Zotac GeForce GTX 275 AMP

Category : NVIDIA

Published by Jean-Luc Hadey on 07.06.09

With the GeForce GTX 275 AMP ZOTAC presents a graphic card which is based on nVidias GT200 graphic chip. ZOTAC overworked the GTX 275s power design. Therefore the card is now provided with a seven phase power design. This is what allows ZOTAC to clock the GPU up to 702 MHz instead of 633 MHz wich is standard. Also the memory is overclocked to 1260 MHz instead of 1130 MHz.


The GT 275 chip which is based on nVidias GT200 comes with 240 shader processors and 80 texture units whereas the shaders are clocked at 1512 MHz. Furthermore the card is equipped with a 448 bit wide memory interface which is able to address 896 MByte of GDDR3 memory. As a special feature with the Zotac GTX 275 AMP you get a seven phase power design which provides a stable current flow to the overclocked components.

On the following pages you'll be able to read what the Zotac GeForce GTX 275 is capable of.



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Technical data / specifications

	Zotac GTX 275 AMP	GeForce GTX 275	GeForce GTX 285	Radeon HD 4890
Chip	G200	G200	G200	RV790
Process	55 nm	55 nm	55 nm	55 nm
Transistors	ca. 1.4 Mrd.	ca.1.4 Mrd.	ca.1.4 Mrd.	ca. 959 Mio.
GPU clock	702 MHz	633 MHz	648 MHz	850 MHz
Shader (MADD)	240 unified	240 unified	240 unified	160 (5D)
Shader clock	1512 MHz	1404 MHz	1476 MHz	850 MHz
Memory	896 GDDR3	896 MB GDDR3	1024 MB GDDR3	1024 MB GDDR5
Memory clock	1260 MHz	1134 MHz	1142 MHz	1950 MHz
Memory interface	448 Bit	448 Bit	512 Bit	256 Bit
Memory bandwidth	141'120 MB/s	127'008 MB/s	158'976 MB/s	124'800 MB/s
ROPs	28	28	32	16
TMUs	80	80	80	40
TAUs	80	80	80	40
Shader model	SM4	SM 4	SM 4	SM 4.1
Maximum board power	ca. 250 Watt	219 Watt	183 Watt	190 W

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Layout

The ZOTAC GTX 275 presents itself on a 27 cm long and black PCB which is provided with power via two six pin plugs. Zotac also spent the GTX 275 a dual slot cooler which is based on a copper ground plate, numerous fins made of aluminium and a 70 mm radial fan which helds the cooler at adequate temperatures.

Further you'll find two HDCP Dual-Link-DVI and one HDTV-out connector at the cards bezel.

Included in delivery is a power cord, a audio connector cable, HDMI- to DVI adaptor as well as a DVI- to analog adaptor. As a software package you'll find drivers and tools as well as the game Race Driver Grid and 3DMark Vantage Advanced.



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Testsystem/Benchmarking

Hardware
Mainboard	Asus P6T Deluxe Intel X58, Bios 10.03
CPU	Intel Core I7 965, 3.2GHz
Memory	DDR3: 3 x 1GB Corsair XMS3 Dominator 1600 MHz 8-8-8-24
Graphic cards ATI	ZOTAC GeForce GTX 275
Hard disk	Samsung 620GB F1
PSU	Corsair 1000 Watt

Software
Operating system	Windows VISTA Home Premium 64Bit SP1
Graphic driver	Nvidia ForceWare 182.50 ATI Catalyst 9.3 mit CCC
Benchmarks	3DMark Vantage
	3DMark 06 v1.1.0
	F.E.A.R
	Far Cry 2
	World in Conflict
	Call of Juarez
	Crysis

All benchmarks are performed at the highest detail level.



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Synthetische Benchmarks

Futuremark 3DMark06

Futuremark 3DMark06	Default (1280x1024 no AA, no AF)
2 x Sapphire Radeon HD 4890 1GB CF	21239
Zotac GTX 275 AMP 896 MB	18965
NVidia GTX 285 1 GB	18795
Sapphire Radeon HD 4890 1 GB	17953
ASUS Radeon HD 4870 1 GB	17108
	1680x1050 8xAA 16xAF
2 x Sapphire Radeon HD 4890 1GB CF	18630
Zotac GTX 275 AMP 896 MB	11326
NVidia GTX 285 1GB	11262
Sapphire Radeon HD 4890 1GB	10467
ASUS Radeon HD 4870 1GB	10269
	1920x1080 8xAA 16xAF
2 x Sapphire Radeon HD 4890 1GB CF	17749
Zotac GTX 275 AMP 896 MB	11130
NVidia GTX 285 1GB	11056
Sapphire Radeon HD 4890 1GB	9806
ASUS Radeon HD 4870 1GB	9594

Futuremark 3DMark Vantage (GPU Score)

Futuremark 3DMark Vantage	Performance-Preset 1280x1024 1xAA 1xAF
2 x Sapphire Radeon HD 4890 1GB CF	14546
Zotac GTX 275 AMP 896 MB	12098
ASUS NVidia GTX 285 1GB	11886
Sapphire Radeon HD 4890 1GB	9881
ASUS Radeon HD 4870 1GB	8588
	High-Preset 1680x1050 2xAA 8xAF
2 x Sapphire Radeon HD 4890 1GB CF	10856
Zotac GTX 275 AMP 896 MB	8423
NVidia GTX 285 1GB	8199
Sapphire Radeon HD 4890 1GB	6235
ASUS Radeon HD 4870 1GB	5479
	Extreme Custom-Preset 1920x1080 8xAA 16xAF
ATI 4890 1GB CF	7406
Zotac GTX 275 AMP 896 MB	6440
NVidia GTX 285 1GB	6240
ATI 4890 1GB	4882
ASUS Radeon HD 4870 1GB	4168

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DX9-Benchmarks

F.E.A.R, results in (FPS)

F.E.A.R

1680x1050 xAA 16xAF

2 x Sapphire Radeon HD 4890 1GB CF	179
NVidia GTX 285 1GB	156
Zotac GTX 275 AMP 896 MB	153
Sapphire Radeon HD 4890 1GB	88
ASUS Radeon HD 4870 1GB	81
	1920x1080 8xAA 16xAF
2 x Sapphire Radeon HD 4890 1GB CF	161
Zotac GTX 275 AMP 896 MB	140
NVidia GTX 285 1GB	137
Sapphire Radeon HD 4890 1GB	79
ASUS Radeon HD 4870 1GB	72

DX10-Benchmarks

Far Cry 2, results in FPS

Far Cry 2	1680x1050 8xAA 16xAF
2 x Sapphire Radeon HD 4890 1GB CF	76.56
Zotac GTX 275 AMP 896 MB	54.35
NVidia GTX 285 1GB	48.75
Sapphire Radeon HD 4890 1GB	35.04
ASUS Radeon HD 4870 1GB	33.82
	1920x1080 8xAA 16xAF
2 x Sapphire Radeon HD 4890 1GB CF	68.60
Zotac GTX 275 AMP 896 MB	48.75
NVidia GTX 285 1GB	48.03
Sapphire Radeon HD 4890 1GB	31.27
ASUS Radeon HD 4870 1GB	29.00

Crysis, results in FPS

CRYSIS

1680x1050 8xAA 16xAF

2 x Sapphire Radeon HD 4890 1GB CF	39.87
Zotac GTX 275 AMP 896 MB	23.57
ASUS NVidia GTX 285 1GB	20.19
Sapphire Radeon HD 4890 1GB	20.99
ASUS Radeon HD 4870 1GB	19.97
	1920x1080 8xAA 16xAF
2 x Sapphire Radeon HD 4890 1GB CF	35.27
Zotac GTX 275 AMP 896 MB	20.38
Sapphire Radeon HD 4890 1GB	18.34
ASUS NVidia GTX 285 1GB	17.23
ASUS Radeon HD 4870 1GB	11.92

World in Conflict, results in FPS

World in Conflict	1680x1050 8xAA 16xAF
2 x Sapphire Radeon HD 4890 1GB CF	70
ASUS NVidia GTX 285 1GB	63
Zotac GTX 275 AMP 896 MB	48
Sapphire Radeon HD 4890 1GB	46
ASUS Radeon HD 4870 1GB	34
	1920x1080 8xAA 16xAF
2 x Sapphire Radeon HD 4890 1GB CF	66
NVidia GTX 285 1GB	60
Zotac GTX 275 AMP 896 MB	45
Sapphire Radeon HD 4890 1GB	43
ASUS Radeon HD 4870 1GB	31

Call of Juarez, results in FPS

Call of Juarez	1680x1050 8xAA 16xAF
2 x Sapphire Radeon HD 4890 1GB CF	90.6
Zotac GTX 275 AMP 896 MB	39.4
NVidia GTX 285 1GB	37.2
Sapphire Radeon HD 4890 1GB	34.6
ASUS Radeon HD 4870 1GB	20
	1920x1080 8xAA 16xAF
2 x Sapphire Radeon HD 4890 1GB CF	82.5
Zotac GTX 275 AMP 896 MB	34.9
NVidia GTX 285 1GB	32.7
Sapphire Radeon HD 4890 1GB	30.9
ASUS Radeon HD 4870 1GB	18.7

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Conclusion

For the Zotac GeForce GTX 275 AMP there stand two very good arguments: first is the performance and second the price. For about CHF 327.- (EUR 218.-) you get a card which performs as well as a GTX 285 that costs CHF 70.- (EUR 45.-) more than the Zotac model. The seven phase power design is what allows Zotac to overclock the GPU by nearly 70 MHz, which is quite astonishing for a factory overclock especially when you keep in mind that GPU is still air cooled.

The Zotac GTX 275 AMP really was able to convice us. Performance as well as price are at a very good level and also the delivery includes with Race Driver Grid and Futuremark Vantage useful software.

Resulting of the above mentioned reasons we give our ocaholic Top Hardware Award to this product.



The ZOTAC GTX 275 can be bought at Digitec.ch to a price of CHF 327.-


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Author: jl.hadey@ocaholic.ch
Revised by: m.buechel@ocaholic.ch