Samsung 845DC EVO SSD 960 Gigabyte Review
Category : Storage
Published by Marc Büchel on 28.07.14
Next to the 845DC PRO Samsung has also launched the 845DC EVO series. This drive is equipped with TLC NAND flash memory chips and therefore it's suitable for read-intensive workloads, preserving precious write cycles. Furthermore TLC NAND allows for highly competitive pricing, which you will get with this drive. Overall we're curious to see how this drive is going to perform.
 Article in English |
 Artikel in Deutsch |
 Article en français |
 Articolo in Italiano |
Specifications / Delivery
| Model | 845DC EVO 240 GB | 845DC EVO 400 GB | 845DC EVO 960 GB |
| Capacity | 240 GB | 400 GB | 960 GB |
| Form Factor | 2.5'' | 2.5'' | 2.5'' |
| Controller | Samsung 3-core MDX | Samsung 3-core MDX | |
| Memory |
|
|
|
| Throughput |
|
|
|
| QOS 4KB, QD32 (99.99%) |
|
|
|
| Latency |
|
|
|
| Power Consumption |
|
|
|
| Temperature |
|
|
|
| Endurance | 150 TBW | 300 TBW | 600 TBW |
| Warranty | 5 Years | 5 Years | 5 Years |
| Price |
249.99 US-Dollar |
489.99 US-Dollar |
969.99 US-Dollar |
Samsung Electronics is finally making a push in the enterprise SSD market whilst also making good headway in the consumer market. First we have the 850 PRO for end-users, then the 845DC PRO and the 845DC EVO enterprise-grade SSDs, which we will be reviewing in this article. In the case of the 850 PRO the most significant upgrade is the NAND Flash, since Samsung is now bringing 3D V-NAND to the mass market, enabling a new level of reliability and endurance. The 845DC EVO is a datacenter optimized SSD with TLC memory, recommended to be used in read-intense environments. You might be asking why Samsung is using TLC NAND in enterprise-grade drives, since P/E-cycle count is much lower than what you get with MLC NAND. As we already mentioned Samsung is targeting read-intensive environments, where P/E-cycle count is secondary if not tertiary.
As already mentioned, Samsung recommends the 845DC EVO for read-intensive environments, therefore sequential as well as random read performance is consitently high, but when it comes to sequential as well as random write performance this drive cannot keep up with the 845DC Pro for instance. In the case of enterprise-grade drives, endurance is usually a main concern. A closer look at rating with the 960 GB 845DC shows a value of 600 TBW, which is just a mere fraction of what you get with the 845DC PRO. What you need to consider with the EVO version is that Samsung is recommending this drive for read-intensive environments, which means write processes aren't of primary concern.
Another necessary feature of an enterprise-grade SSD is data-path-protection in the case of sudden power-loss. For this purpose there is an array of tantalum capacitors ensuring data residing in the volatile 1024 MB DDR3 buffer can be safely written into non-volatile NAND Flash memory.
Samsung is using the MEX controller for the 845DC EVO SSDs. Compared to the older MDX controller, that's also being used on the 845DC PRO, the new model clockes 100 MHz quicker at 400 MHz. Checking what's going on under the hood reveals there is the same ARM Cortex-R4 based controller there was with the predecessor, which features three cores.
Looking at the exterior of the SSDs, the Samsung 845DC EVO is only available in the 2.5 inch form factor with a height of 7 millimeters. The interface is SATA 3.1, and we're curious to see whether Samsung is planning on releasing a SAS version of this drive. This might be a move demanded by the markets, since the majority of datacenters are built upon SAS infrastructure.
Impressions
How do we test?
Testenvironment
| Models | |
| ADATA S511 60 GB |
|
| ADATA S511 SSD 120 GB |
|
| ADATA XPG mSATA SSD SX300 128 GB |
|
| Corsair Force 3 120 GB |
|
| Corsair Force GS 240 GB |
|
| Corsair Force GT 120 GB |
|
| Corsair Neutron GTX 240 GB |
|
| Crucial M500 480 GB |
|
| Extrememory XLR8 Express 120 GB |
|
| Intel SSD 335 Series 240 GB |
|
| Intel SSD 520 180 GB |
|
| Intel SSD 520 240 GB |
|
| Intel X25-M 80 GB |
|
| Intel X25-M Gen2 34nm 160 GB |
|
| Kingmax SMP35 Client 240 GB | n/A |
| Kingston HyperX SSD 120 GB |
|
| Kingston HyperX 3K SSD 120 GB |
|
| Kingston HyperX SSD 240 GB |
|
| Kingston SSDNow V+ 200 90 GB |
|
| OCZ Agility 3 240 GB |
|
| OCZ Agility 4 256 GB |
|
| OCZ IBIS 240 GB |
|
| OCZ Octane 512 GB |
|
| OCZ Octane 1 TB |
|
| OCZ RevoDrive 3 240 GB |
|
| OCZ RevoDrive 3 X2 480 GB PCIe-SSD |
|
| OCZ RevoDrive X2 480 GB PCIe-SSD |
|
| OCZ RevoDrive Hybrid 120GB SSD, 1TB HDD |
|
| OCZ Synapse 64 GB |
|
| OCZ Deneva 2 200 GB eMLC |
|
| OCZ Vector 150 240 GB |
|
| OCZ Vector 256 GB |
|
| OCZ Vertex 3 240 GB |
|
| OCZ Vertex 3.20 120 GB |
|
| OCZ Vertex 3.20 240 GB |
|
| OCZ Vertex 4 256 GB |
|
| OCZ Vertex 4 512 GB |
|
| OCZ Vertex 450 256 GB |
|
| OCZ Vertex 460 120 GB |
|
| OCZ Vertex 460 240 GB |
|
| Plextor M5Pro 256 GB |
|
| Samsung PM830 SSD 128 GB |
|
| Samsung PM830 SSD 256 GB |
|
| Smasung 840Evo 120 GB |
|
| Samsung 840Evo 250 GB mSATA |
|
| Samsung 840Evo 1 TB |
|
| Samsung 840 Pro 256 GB |
|
| Samsung 845DC EVO 960 GB |
|
| Samsung 845DC PRO 800 GB |
|
| SanDisk Extreme SSD 120 GB |
|
| SanDisk Extreme SSD 240 GB |
|
| Toshiba THNSNF512GCSS 512 GB | n/A |
Testenvironment |
|
| Motherboard | ASUS Maximus VII Gene |
| Chipset | Intel Z97 |
| CPU | Intel Core i7-4700k |
| Memory | G.Skill Ares 2133 MHz |
| Graphics card | ASUS GeFroce GTX 680 |
| Storage (system) | Intel SSD 335 Series |
| Operating systems | Windows 7 64 Bit with caching drives |
iozone
iozone3 is a benchmark suite for storage solutions which natively runs under Windows/Linux.We are testing the throughput rates/IOPS with different block sizes using the following commands:
KByte/s
- iozone -Rb test4k.xls -i0 -i1 -i2 -+n -r 4k -s4g -t32
- iozone -Rb test256k.xls -i0 -i1 -i2 -+n -r 256k -s4g -t32
iops
- iozone -Rb test4ko.xls -i0 -i1 -i2 -+n -r 4k -s4g -t32 -O
KByte/s, Sequential write |
||
| Sequential write | Bewertung |
Throughput 256 KByte Block Size |
| OCZ RevoDrive 3 X2 480 GB PCIe-SSD |  |
1'291'486 |
| OCZ RevoDrive 3 240 GB | No Review |
771'043 |
| OCZ RevoDrive Hybrid 120GB SSD, 1TB HDD |  |
750'096 |
| OCZ RevoDrive X2 480 GB PCIe-SSD |  |
694'586 |
| OCZ IBIS 240 GB | |
680'372 |
| Samsung 840 Pro 256 GB | |
536'082 |
| OCZ Vector 150 240 GB |
 |
534'262 |
| OCZ Vector 256 GB | |
534'058 |
| OCZ Deneva 2 200 GB eMLC | |
533'969 |
| Intel SSD 335 Series 240 GB | No Review |
533'672 |
| OCZ Vertex 450 256 GB |
|
522'897 |
| Corsair Force GS 240 GB | |
522'613 |
| OCZ Vertex 3 240 GB | |
522'212 |
| Kingmax SMP35 Client 240 GB | |
519'430 |
| Kingston HyperX SSD 240 GB | |
519'190 |
| Corsair Neutron GTX 240 GB | |
519'104 |
| OCZ Vertex 3.20 240 GB | |
517'290 |
| Intel SSD 520 240 GB | |
516'603 |
| Kingston HyperX SSD 120 GB | |
515'218 |
| OCZ Vertex 4 256 GB | |
513'309 |
| Corsair Force GT 120 GB | |
512'676 |
| Intel SSD 520 180 GB | No Review |
512'628 |
| SanDisk Extreme SSD 240 GB | No Review |
511'805 |
| OCZ Vertex 3.20 120 GB | |
510'245 |
| SanDisk Extreme SSD 120 GB | |
507'743 |
| Kingston HyperX 3K SSD 120 GB | |
505'669 |
| Toshiba THNSNF512GCSS 512 GB | No Review |
504'589 |
| Kingston SSDNow V+ 200 90 GB | |
502'272 |
| Samsung 845DC PRO 800 GB |
|
500'153 |
| ADATA XPG mSATA SSD SX300 128 GB | |
499'239 |
| Extrememory XLR8 Express 120 GB | |
491'205 |
| OCZ Synapse 64 GB | |
469'784 |
| Samsung 840 Evo 1 TB | |
462'097 |
| ADATA S511 60 GB | |
457'001 |
| Plextor M5 Pro 256 GB | No Review |
444'122 |
| Crucial M500 480 GB | No Review |
439'829 |
| Samsung 845DC EVO 960 GB | |
436'531 |
| OCZ Vertex 4 512 GB | |
434'466 |
| OCZ Vertex 460 120 GB | |
421'139 |
| OCZ Agility 4 256 GB | |
405'911 |
| ADATA S511 SSD 120 GB | |
343'488 |
| Corsair Force 3 120 GB |  |
328'922 |
| Samsung 840 Evo 250 GB mSATA |
No Review |
324'238 |
| Samsung PM830 SSD 256 GB | |
321'474 |
| OCZ Octane 1 TB | |
314'144 |
| OCZ Octane 512 GB | |
307'781 |
| Samsung PM830 SSD 128 GB | |
271'696 |
| OCZ Agility 3 240 GB | |
266'401 |
| Samsung 840Evo 120 GB | No Review |
219'159 |
| Intel X25-M Gen2 34nm 160 GB | |
80'719 |
| Intel X25-M 80 GB | |
77'257 |
KByte/s, Sequential Read |
||
| Sequential Read |
Bewertung |
Throughput 256 KByte Block Size |
| OCZ RevoDrive 3 X2 480 GB PCIe-SSD | |
1'460'560 |
| OCZ RevoDrive 3 240 GB | No Review |
857'972 |
| OCZ IBIS 240 GB | |
806'858 |
| OCZ RevoDrive Hybrid 120GB SSD, 1TB HDD | |
729'929 |
| OCZ RevoDrive X2 480 GB PCIe-SSD | |
716'357 |
| OCZ Vector 256 GB | |
553'400 |
| OCZ Vector 150 240 GB |
|
547'188 |
| Intel SSD 520 240 GB | |
545'843 |
| Intel SSD 520 180 GB | No Review |
545'656 |
| Samsung 840 Pro 256 GB | |
545'353 |
| Samsung 845DC PRO 800 GB |
|
544'499 |
| ADATA XPG mSATA SSD SX300 128 GB | |
543'650 |
| ADATA S511 SSD 120 GB | |
542'606 |
| Corsair Neutron GTX 240 GB | |
542'442 |
| OCZ Vertex 4 512 | |
542'075 |
| Samsung 845DC EVO 960 GB | |
541'626 |
| Kingston HyperX SSD 120 GB | |
541'613 |
| Intel SSD 335 Series 240 GB | No Review |
541'542 |
| Corsair Force GS 240 GB | |
541'086 |
| OCZ Deneva 2 200 GB eMLC | |
540'973 |
| Toshiba THNSNF512GCSS 512 GB | No Review |
539'056 |
| Samsung PM830 SSD 128 GB | |
539'754 |
| Corsair Force GT 120 GB | |
539'648 |
| Kingston HyperX SSD 240 GB | |
537'745 |
| ADATA S511 60 GB | |
537'560 |
| OCZ Vertex 4 256 | |
536'605 |
| Samsung 840 Evo 1 TB | |
536'542 |
| OCZ Vertex 3 240 GB | |
534'988 |
| OCZ Vertex 3.20 240 GB | |
534'392 |
| OCZ Vertex 450 256 GB |
|
534'241 |
| Samsung PM830 SSD 256 GB | |
534'154 |
| Samsung 840 Evo 250 GB mSATA | No Review |
532'816 |
| Plextor M5 Pro 256 GB | No Review |
530'606 |
| OCZ Vertex 3.20 120 GB | |
530'584 |
| Kingston HyperX 3K SSD 120 GB | |
529'995 |
| SanDisk Extreme SSD 240 GB | No Review |
529'520 |
| OCZ Vertex 460 120 GB | |
529'462 |
| Crucial M500 480 GB | No Review |
525'278 |
| Extrememory XLR8 Express 120 GB | |
521'930 |
| OCZ Agility 3 240 GB | |
516'479 |
| Kingston SSDNow V+ 200 90 GB | |
510'372 |
| SanDisk Extreme SSD 120 GB | |
507'743 |
| Samsung 840Evo 120 GB | No Review |
504'587 |
| Kingmax SMP35 Client 240 GB | |
498'223 |
| Corsair Force 3 120 GB | |
490'777 |
| OCZ Synapse 64 GB | |
441'396 |
| OCZ Octane 1 TB | |
440'052 |
| OCZ Octane 512 GB | |
438'465 |
| Intel X25-M Gen2 34nm 160 GB |
|
247'759 |
| Intel X25-M 80 GB | |
240'404 |
| OCZ Agility 4 256 GB | |
209'723 |
KByte/s, Random write |
||
| Random write |
Bewertung |
Throughput 4 KByte Block Size |
| OCZ RevoDrive 3 X2 480 GB PCIe-SSD | |
756'658 |
| Samsung 840 Pro 256 GB | |
412'837 |
| OCZ RevoDrive 3 240 GB | No Review |
382'970 |
| OCZ Vertex 4 512 GB | |
362'053 |
| OCZ Vector 150 240 GB |
|
356'006 |
| OCZ Vertex 4 256 GB | |
354'573 |
| OCZ Vector 256 GB | |
354'246 |
| Samsung 845DC EVO 960 GB | |
346'184 |
| Crucial M500 480 GB | No Review |
346'003 |
| Samsung 840 Evo 1 TB | |
344'730 |
| Samsung 845DC PRO 800 GB |
|
343'726 |
| OCZ Agility 4 256 GB | |
341'478 |
| OCZ Octane 1 TB | |
325'007 |
| OCZ Octane 512 GB | |
324'023 |
| Corsair Force GS 240 GB | |
301'486 |
| Samsung 840 Evo 250 GB mSATA |
No Review |
299'848 |
| OCZ Vertex 450 256 GB |
|
292'401 |
| SanDisk Extreme SSD 240 GB | No Review |
287'255 |
| OCZ Vertex 3.20 240 GB | |
286'949 |
| Corsair Neutron GTX 240 GB | |
285'558 |
| OCZ Vertex 460 120 GB | |
285'407 |
| Intel SSD 520 180 GB | No Review |
284'858 |
| Intel SSD 520 240 GB | |
283'794 |
| OCZ Deneva 2 200 GB eMLC | |
283'409 |
| OCZ Vertex 3.20 120 GB | |
282'578 |
| Kingston HyperX SSD 240 GB | |
280'556 |
| Kingston HyperX 3K SSD 120 GB | |
279'967 |
| Kingston SSDNow V+ 200 90 GB | |
276'859 |
| OCZ Vertex 3 240 GB | |
275'499 |
| ADATA XPG mSATA SSD SX300 128 GB | |
264'870 |
| OCZ IBIS 240 GB | |
262'687 |
| Intel SSD 335 Series 240 GB | No Review |
262'005 |
| Kingston HyperX SSD 120 GB | |
255'988 |
| Plextor M5 Pro 256 GB | No Review |
254'918 |
| Corsair Force GT 120 GB | |
253'269 |
| SanDisk Extreme SSD 120 GB | |
252'045 |
| ADATA S511 SSD 120 GB | |
244'150 |
| ADATA S511 60 GB | |
226'394 |
| OCZ Agility 3 240 GB | |
242'683 |
| Extrememory XLR8 Express 120 GB | |
237'082 |
| Corsair Force 3 120 GB | |
225'092 |
| OCZ RevoDrive Hybrid 120GB SSD, 1TB HDD | |
213'027 |
| OCZ Synapse 64 GB | |
200'308 |
| Samsung PM830 SSD 256 GB | |
156'814 |
| OCZ RevoDrive X2 480 GB PCIe-SSD | |
156'644 |
| Samsung 840Evo 120 GB | No Review |
148'166 |
| Samsung PM830 SSD 128 GB | |
132'997 |
| Toshiba THNSNF512GCSS 512 GB | No Review |
95'808 |
| Kingmax SMP35 Client 240 GB | |
94'447 |
| Intel X25-M Gen2 34nm 160 GB |
|
62'388 |
| Intel X25-M 80 GB | |
48'194 |
KByte/s, Random read |
||
| Random read |
Bewertung |
Throughput 4 KByte Block Size |
| OCZ RevoDrive 3 X2 480 GB PCIe-SSD | |
640'327 |
| Plextor M5 Pro 256 GB | No Review |
392'851 |
| Samsung 840 Evo 250 GB mSATA | No Review |
400'192 |
| Samsung 840 Evo 1 TB | |
384'527 |
| OCZ Vector 256 GB | |
381'510 |
| Toshiba THNSNF512GCSS 512 GB | No Review |
373'590 |
| OCZ Vertex 4 512 GB | |
368'728 |
| Samsung 845DC PRO 800 GB |
|
368'001 |
| OCZ RevoDrive 3 240 GB | No Review |
364'987 |
| Corsair Neutron GTX 240 GB | |
359'009 |
| OCZ IBIS 240 GB | |
357'112 |
| Samsung 840 Pro 256 GB | |
353'123 |
| Samsung 845DC EVO 960 GB | |
349'781 |
| OCZ Vertex 4 256 GB | |
348'881 |
| Samsung 840Evo 120 GB | No Review |
348'724 |
| Crucial M500 480 GB | No Review |
346'164 |
| OCZ Vertex 450 256 GB |
|
337'922 |
| OCZ Vector 150 240 GB |
|
328'627 |
| Samsung PM830 SSD 256 GB | |
310'109 |
| OCZ Vertex 460 120 GB | |
309'467 |
| Intel SSD 520 240 GB | |
283'794 |
| OCZ Agility 4 256 GB | |
255'743 |
| Kingmax SMP35 Client 240 GB | |
231'999 |
| OCZ Deneva 2 200 GB eMLC | |
226'958 |
| Intel SSD 520 180 GB | No Review |
212'409 |
| OCZ Vertex 3.20 240 GB | |
171'179 |
| Intel SSD 335 Series 240 GB | No Review |
171'684 |
| Kingston HyperX SSD 240 GB | |
168'648 |
| OCZ Vertex 3 240 GB | |
167'922 |
| Corsair Force GS 240 GB | |
163'408 |
| Samsung PM830 SSD 128 GB | |
151'097 |
| Extrememory XLR8 Express 120 GB | |
149'622 |
| OCZ Agility 3 240 GB | |
142'942 |
| SanDisk Extreme SSD 240 GB | No Review |
141'910 |
| OCZ Octane 1 TB | |
126'603 |
| OCZ Octane 512 GB | |
123'553 |
| ADATA XPG mSATA SSD SX300 128 GB | |
102'038 |
| Kingston HyperX 3K SSD 120 GB | |
102'031 |
| Corsair Force GT 120 GB | |
98'387 |
| Kingston HyperX SSD 120 GB | |
96'042 |
| ADATA S511 SSD 120 GB | |
95'928 |
| SanDisk Extreme SSD 120 GB | |
93'316 |
| Kingston SSDNow V+ 200 90 GB | |
89'121 |
| OCZ RevoDrive Hybrid 120GB SSD, 1TB HDD | |
87'188 |
| Corsair Force 3 120 GB | |
84'113 |
| OCZ Vertex 3.20 120 GB | |
81'160 |
| Intel X25-M Gen2 34nm 160 GB |
|
58'647 |
| ADATA S511 60 GB | |
51'187 |
| OCZ Synapse 64 GB | |
47'918 |
| OCZ RevoDrive X2 480 GB PCIe-SSD | |
43'003 |
| Intel X25-M 80 GB | |
30'287 |
IOPS, Random write |
||
| Random write |
Bewertung |
IOPS 4 KByte Block Size |
| OCZ RevoDrive 3 X2 480 GB PCIe-SSD | |
189'164 |
| OCZ RevoDrive 3 240 GB | No Review |
95'782 |
| OCZ Vertex 4 512 GB | |
90'519 |
| Crucial M500 480 GB | No Review |
88'642 |
| OCZ Vector 256 GB | |
88'537 |
| OCZ Vertex 4 256 GB | |
88'460 |
| Samsung 845DC EVO 960 GB | |
86'634 |
| Samsung 845DC PRO 800 GB |
|
85'813 |
| Samsung 840 Evo 1 TB | |
85'792 |
| OCZ Agility 4 256 GB | |
85'373 |
| OCZ Vector 150 240 GB |
|
81'175 |
| Samsung 840 Evo 250 GB mSATA | No Review |
76'721 |
| Corsair Force GS 240 GB | |
75'577 |
| OCZ Vertex 450 256 GB |
|
74'983 |
| OCZ Deneva 2 200 GB eMLC | |
74'389 |
| Samsung 840 Pro 256 GB | |
72'000 |
| OCZ Vertex 3.20 240 GB | |
71'470 |
| Intel SSD 520 240 GB | |
71'338 |
| OCZ Vertex 460 120 GB | |
71'323 |
| OCZ Vertex 3.20 120 GB | |
71'227 |
| Corsair Neutron GTX 240 GB | |
71'180 |
| Intel SSD 520 180 GB | No Review |
70'944 |
| OCZ Vertex 3 240 GB | |
70'031 |
| Kingston HyperX SSD 240 GB | |
70'016 |
| Kingston HyperX 3K SSD 120 GB | |
69'760 |
| Corsair Force GT 120 GB | |
69'108 |
| OCZ IBIS 240 GB | |
67'339 |
| ADATA XPG mSATA SSD SX300 128 GB | |
66'107 |
| SanDisk Extreme SSD 240 GB | No Review |
65'817 |
| Intel SSD 335 Series 240 GB | No Review |
65'714 |
| Kingston SSDNow V+ 200 90 GB | |
64'446 |
| Plextor M5 Pro 256 GB | No Review |
63'620 |
| Kingston HyperX SSD 120 GB | |
63'553 |
| ADATA S511 SSD 120 GB | |
61'302 |
| OCZ Agility 3 240 GB | |
60'579 |
| Extrememory XLR8 Express 120 GB | |
58'604 |
| ADATA S511 60 GB | |
56'749 |
| Corsair Force 3 120 GB | |
56'017 |
| SanDisk Extreme SSD 120 GB | |
53'719 |
| OCZ RevoDrive Hybrid 120GB SSD, 1TB HDD | |
53'618 |
| OCZ Synapse 64 GB | |
52'126 |
| OCZ RevoDrive X2 480 GB PCIe-SSD | |
39'744 |
| Samsung PM830 SSD 256 GB | |
39'192 |
| Samsung 840Evo 120 GB | No Review |
38'077 |
| Samsung PM830 SSD 128 GB | |
32'772 |
| Toshiba THNSNF512GCSS 512 GB | No Review |
23'799 |
| Kingmax SMP35 Client 240 GB | |
23'640 |
| OCZ Octane 1 TB | |
22'192 |
| OCZ Octane 512 GB | |
20'492 |
| Intel X25-M Gen2 34nm 160 GB |
|
15'434 |
| Intel X25-M 80 GB | |
6'297 |
IOPS, Random read |
||
| Random read |
Bewertung |
IOPS 4 KByte Block Size |
| OCZ RevoDrive 3 X2 480 GB PCIe-SSD | |
160'832 |
| Samsung 840 Pro 256 GB | |
100'198 |
| Samsung 840 Evo 250 GB mSATA | No Review |
99'476 |
| Plextor M5 Pro 256 GB | No Review |
98'600 |
| Samsung 840 Evo 1 TB | |
96'308 |
| OCZ Vector 256 GB | |
95'614 |
| Toshiba THNSNF512GCSS 512 GB | No Review |
93'251 |
| Samsung 845DC PRO 800 GB |
|
92'101 |
| OCZ RevoDrive 3 240 GB | No Review |
91'642 |
| OCZ Vertex 4 512 GB | |
92'288 |
| Samsung 840Evo 120 GB | No Review |
91'598 |
| OCZ Vector 150 240 GB |
|
89'692 |
| OCZ IBIS 240 GB | |
89'630 |
| Corsair Neutron GTX 240 GB | |
89'585 |
| OCZ Vertex 4 256 GB | |
87'654 |
| Samsung 845DC EVO 960 GB | |
87'544 |
| Crucial M500 480 GB | No Review |
86'622 |
| OCZ Vertex 450 256 GB |
|
84'561 |
| Samsung PM830 SSD 256 GB | |
77'637 |
| OCZ Vertex 460 120 GB | |
77'119 |
| OCZ Agility 4 256 GB | |
63'925 |
| Kingmax SMP35 Client 240 GB | |
57'856 |
| OCZ Deneva 2 200 GB eMLC | |
55'090 |
| Intel SSD 520 180 GB | No Review |
53'477 |
| Intel SSD 520 240 GB | |
51'835 |
| Corsair Force GS 240 GB | |
51'373 |
| Intel SSD 335 Series 240 GB | No Review |
46'647 |
| OCZ Vertex 3 240 GB | |
42'308 |
| Kingston HyperX SSD 240 GB | |
41'917 |
| OCZ Vertex 3.20 240 GB | |
41'813 |
| Samsung PM830 SSD 128 GB | |
37'813 |
| Extrememory XLR8 Express 120 GB | |
37'403 |
| SanDisk Extreme SSD 240 GB | No Review |
36'550 |
| OCZ Agility 3 240 GB | |
35'295 |
| OCZ Octane 1 TB | |
32'403 |
| OCZ Octane 512 GB | |
31'442 |
| Kingston HyperX 3K SSD 120 GB | |
25'822 |
| ADATA XPG mSATA SSD SX300 128 GB | |
25'036 |
| Corsair Force GT 120 GB | |
24'807 |
| Kingston HyperX SSD 120 GB | |
24'473 |
| ADATA S511 SSD 120 GB | |
24'338 |
| SanDisk Extreme SSD 120 GB | |
22'278 |
| Kingston SSDNow V+ 200 90 GB | |
21'443 |
| OCZ RevoDrive Hybrid 120GB SSD, 1TB HDD | |
21'853 |
| Corsair Force 3 120 GB | |
20'718 |
| OCZ Vertex 3.20 120 GB | |
20'438 |
| Intel X25-M Gen2 34nm 160 GB |
|
14'606 |
| ADATA S511 60 GB | |
12'963 |
| OCZ Synapse 64 GB | |
11'980 |
| OCZ RevoDrive X2 480 GB PCIe-SSD | |
10'833 |
| Intel X25-M 80 GB | |
5'349 |
Conclusion
Throughput 1 Thread (QD1)
| 1T Throughput (KB/s) | ||||||||
| 4k | 8k | 16k | 32k | 64k | 128k | 256k | 512k | |
| Seq write | 480'360 | 474'660 | 485'636 | 429'653 | 452'800 | 458'151 | 455'157 | 467'644 |
| Seq read | 390'492 | 361'363 | 382'827 | 360'318 | 408'736 | 422'010 | 380'687 | 411'419 |
| Rand write | 151'232 | 232'014 | 299'295 | 356'542 | 358'237 | 399'006 | 419'287 | 442'418 |
| Rand read | 30'871 | 49'514 | 75'295 | 115'760 | 185'518 | 219'859 | 236'822 | 264'805 |
Throughput 4 Threads (QD4)
| 4T Throughput (KB/s) | ||||||||
| 4k | 8k | 16k | 32k | 64k | 128k | 256k | 512k | |
| Seq write | 475'447 | 484'935 | 495'631 | 484'786 | 486'336 | 487'678 | 497'158 | 488'613 |
| Seq read | 529'173 | 510'930 | 533'589 | 525'159 | 515'890 | 539'283 | 545'806 | 545'903 |
| Rand write | 335'925 | 391'727 | 441'175 | 464'847 | 479'732 | 485'379 | 496'869 | 487'207 |
| Rand read | 116'712 | 194'183 | 258'036 | 344'995 | 413'217 | 488'916 | 541'473 | 522'104 |
Throughput 8 Threads (QD8)
| 8T Throughput (KB/s) | ||||||||
| 4k | 8k | 16k | 32k | 64k | 128k | 256k | 512k | |
| Seq write | 475'722 | 477'939 | 501'242 | 459'821 | 485'821 | 449'344 | 467'573 | 480'227 |
| Seq read | 520'651 | 516'874 | 517'984 | 527'740 | 533'867 | 545'853 | 546'124 | 546'250 |
| Rand write | 333'544 | 387'538 | 428'703 | 461'995 | 473'034 | 478'316 | 479'967 | 486'184 |
| Rand read | 236'968 | 348'870 | 450'032 | 515'935 | 536'506 | 531'879 | 520'237 | 543'066 |
Throughput 16 Threads (QD16)
| 16T Throughput (KB/s) | ||||||||
| 4k | 8k | 16k | 32k | 64k | 128k | 256k | 512k | |
| Seq write | 476'226 | 487'827 | 488'898 | 498'700 | 497'990 | 492'851 | 495'507 | 498'517 |
| Seq read | 519'429 | 484'994 | 533'751 | 537'482 | 542'011 | 546'090 | 545'935 | 542'698 |
| Rand write | 342'247 | 398'585 | 441'364 | 482'823 | 482'179 | 502'659 | 490'642 | 597'376 |
| Rand read | 362'563 | 466'619 | 506'489 | 526'128 | 527'673 | 533'284 | 526'500 | 539'689 |
Throughput 32 Threads (QD32)
| 32T Throughput (KB/s) | ||||||||
| 4k | 8k | 16k | 32k | 64k | 128k | 256k | 512k | |
| Seq write | 483'234 | 497'561 | 500'193 | 535'243 | 511'291 | 508'925 | 500'153 | 501'576 |
| Seq read | 503'550 | 518'727 | 527'877 | 535'559 | 543'893 | 546'068 | 549'013 | 533'151 |
| Rand write | 343'726 | 398'123 | 453'785 | 479'904 | 494'585 | 508'996 | 526'882 | 51'895 |
| Rand read | 368'001 | 464'624 | 504'144 | 525'451 | 529'137 | 544'131 | 544'499 | 535'028 |
Conclusion
Announcement: Despite the circumstance that the rating of a product is based on as many objective facts as possible there are factors which can have an influence on a rating after publication. Every autor may perceive data differently over time whereas one possible reason for example is a deeper background knowledge or understanding of certain processes. Certain unforseen market conditions as well as changes have the potential to render a descision made at a certain point in time obsolete.With the 845DC Series Samsung Electronics have launched their first enterprise-grade series of SSDs. Samsung Semiconductor on the other hand is active in that area since a long time, generating know-how that can now be found in the latest drives launched by Samsung Electronics. In the case of the 845DC EVO Samsung created a highly, competitive priced drive for data centers, that features power loss protection (PLP). Other than that the drive is suitable for read-intensive environments. The reason why Samsung can push really hard through pricing is because of TLC NAND, that's being used but on the other hand this has a strong negative impact on endurance.
In terms of raw performance our test drive was able to score 437 MB/s sequential write and 542 MB/s sequential read throughput. When it comes to 4K IOPS we measured 87'500 IOPS regarding random read and 86'600 regarding random write. In case of sequential write the drive performs average, which is no surprise with a model made for read-intensive environments. With random read we see the SATA-III inferfce is being maxed out and therefore performance is where it should be. When it comes to random read IOPS performance we measured almost point blank the same Samsung advertises. On the other hand, when it comes to random write performance we were in for quite a surprise, since Samsung claims this drive can only do 14'000 IOPS 4K random write. We measured a whopping 86'600 IOPS. On another note we also had a look at performance with different queue depths as you can see on page 10. In case of random read performance we see 7'700 IOPS and when it comes to random write we see 37'800 IOPS (twice as much as communicated by Samsung).
If you do as Samsung recommends and you only deploy thise drive in read-intensive environments, then you won't hit the advertised endurance rating of 600 TBW (960 GB model) within five years, which is actually the warranty period.
Last but not least there is the pricing. The Samsung 845DC EVO 240GB comes with an MSRP of 249.99 US-Dollar, the 845DC EVO 480GB is recommended to sell for 489.99 US-Dollar and the 845DC EVO 960GB features 969.99 US-Dollar price tag. Price per gigabyte is therefore somewhere inbetween 1.04 and 1.01 US-Dollar, which is simply out of reach for competitors at this point in time.
Should you be looking for an enterprise-grade SSD, which can easily deal with read-intensive workloads, then we recommend considering this drive.
Authors: m.buechel@ocaholic.ch