Hi,
I got a retail version of Asus Crosshair III Formula motherboard fresh from production line. This motherboard is based on AMD 790FX chipset and should be optimized for extreme-overclocking. I tested it yesterday with 10 liters of LN2 and Phenom II X4 AM3 ES CPU.
According to Asus: Crosshair III Formula is designed without any PCIEx lane switches which is a big advantage when you aim to have the best possible trace layout for performance, stability and overclockability. Trace optimization is a big part of this board as well as other ROG boards.
I ran 3DMark05 and 3DMark06 with one and two ATI Radeon HD 4870 X2. Both cards were with default BIOS and stock cooling so I just adjusted clocks to 800/950 from CCC. Corsair Dominator DDR3-1866 C8 2 GB kit was running at 7-6-6-18 1T settings 900 MHz with 2,12V. No problems with memory (I used outer slots).
ATI Radeon HD 4870 X2 CrossFireX (800/950):
3DMark05 multicard: 46783 (#4 in hwbot)
3DMark06 multicard: 35924 (#4 in hwbot)
Both of the results are 2nd highest AMD scores just behind Kingpin.
Some thoughts:
- For some reason I was not able to get the system to boot NB @ 4,5 GHz at all so I had to run tests at ~4,275 GHz
- TweakIt works great with keyboard. I was able to adjust Bus Speed during 3DMark06 precisely between 1 MHz intervals. TweakIt is more accurate than AMD's overdrive and helped me to finish 3DMark06 @ 6300 - 6244 MHz. I had to lower CPU clock for GT3 and GT4
- This board definitely seems to be optimized for extreme-overclocking. System was stable @ 6,3 GHz for hours.. with M4A79T Deluxe system was stable closer to 6,2 GHz than 6,3 GHz
- I ran completely out of LN2 40 seconds before GT4 ended when I was hunting down 36kTemperature dropped to -175C and 06 crashed 20 seconds before finishing the test. Despite not breaking 36k I'm pretty happy with the results
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