ASUS Crosshair IV Extreme The Ultimate AM3 Board

Published by Christian Ney on 26.01.11
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Overclocking

Bus frequency overclocking

For the following tests we started with the memory set to 1066 MHz with 8-8-8-24 timings at 1.65 Volt. To determine wether the system was stable or not we were using the CPU test of Futuremarks 3DMark 06. To enter the different setting we use both the BIOS as well as TurboV EVO from ASUS.

Motherboard CPUFreq BusFreq NBFreq HTFreq RamFreq
ASUS Crosshair IV Extreme Bus OC 1504 Mhz 376 Mhz 2'256 Mhz 376 Mhz 1002 Mhz
DFI LanParty DK 790FXB-M3H5 Bus OC 1'380 Mhz 345 Mhz 2'070 Mhz 345 Mhz 690 Mhz
ECS A890GXM-A2 Bus OC 2'480 MHz 310 MHz 1'860 MHz 620 MHz 826 MHz
ASUS M4A78-HTPC (DDR2) Bus OC 1'355 Mhz 271 Mhz 1'084 Mhz 271 Mhz 452 Mhz
ECS A890GXM-A2 Bus @ Stock 1'600 MHz 200 MHz 1'400 MHz 200 MHz 533 MHz
ASUS M4A78-HTPC (DDR2) Bus Stock 1'000 Mhz 200 Mhz 800 Mhz 200 Mhz 333 Mhz
DFI LanParty DK 790FXB-M3H5 Bus Stock 800 Mhz 200 Mhz 1'200 Mhz 200 Mhz 400 Mhz
ASUS Crosshair IV Extreme Bus Stock 800 Mhz 200 Mhz 1200 Mhz 200 Mhz 533 Mhz
  Higher is better


Regarding the bus clock we were able to reach 376 MHz stable in 3DMark06 on our ASUS Crosshair IV Extreme and with resonable voltages. 350 MHz where the max bootable from the BIOS, the last 26 Mhz were increased with TurboV EVO under windows. Even if this frequency is just amazing, it seems like our memory kit was limiting - unfortunately. As we weren't able to use a 2x DRAM ratio, the 2.66x ratio was running our 800 Mhz kit at 1'002 Mhz.


CPU Overclocking

For this test we kept the previous settings:

  • NBFreq : 6 x 200 MHz
  • HTFreq : 2 x 200 Mhz
  • MemoryFreq : 2.66 x 200 Mhz @ 8-8-8-24, 1.68 V
  • CPUFreq : 16 x 200 Mhz

In this test we also used TurboV EVO as well as the BIOS to do the overclocking.


CPU Overclocking CPU Freq Percent
ASUS Crosshair IV Extreme 4'362 107.70 %
DFI LanParty DK 790FXB-M3H5 4'350 107.41 %
ECS A890GXM-A2 4'275 105.55 %
ASUS M4A78-HTPC (DDR2) 4'050 100.00 %
  Higher is better

The highest frequency which we reached stably was 4'362 MHz which is the limit for our Phenom II x6 1090T BE. Therefore we needed to provide the CPU with 1.5 Volt. To obtain overclocking results which are as comparable as possible we set northbridge and the HT multiplyer to 10. The memory frequency we tried to keep as close to 800 MHz as possible.


Motherboard 3DMark06 3DMark06 CPU 3DMarkVantage 3DMarkVantage CPU SuperPi 1M WPrime 32M Average %
ASUS Crosshair IV Extreme OC 21'006 7'580 13'757 21'556 16.256 sec 6.005 sec 125.99 %
DFI LanParty DK 790FXB-M3H5 OC 20'633 7'454 13'425 21'407 16.224 sec 6.271 sec 123.76 %
ECS A890GXM-A2 OC 20'623 7'475 13'501 21'075 16.380 sec 6.287 sec 123.31 %
ASUS M4A78-HTPC (DDR2-800-CL4) OC 20'135 7'026 13'383 20'130 17.285 sec 6.784 sec 118.79 %
ASUS Crosshair IV Extreme Stock 17'471 5'803 12'960 16'747 21.341 8.345 100.00 %
ECS A890GXM-A2 Stock 17'054 5'647 12'884 16'286 21.653 sec 8.143 sec  98.77 %
ASUS M4A78-HTPC (DDR2-800-CL4) Stock 17'156 5'663 12'920 16'226 21.606 sec 8.237 sec 98.09 %
DFI LanParty DK 790FXB-M3H5 Stock 16'866 5'693 12'792 16'390 21.590 sec 8.656 sec 97.74 %
  more is better less is better  

   


Page 1 - ASUS Crosshair IV Extreme Page 9 - SuperPi/WPrime
Page 2 - Specifications Page 10 - Games
Page 3 - Presentaion/Layout/I/O/Bundle Page 11 - Software / Hardware ROG
Page 4 - BIOS Page 12 - Temperatures
Page 5 - Test Setup Page 13 - Overclocking
Page 6 - FutureMark Page 14 - Lucid HydraLogix
Page 7 - SiSoft Sandra 1 Page 15 - Conclusion
Page 8 - SiSoft Sandra 2  



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