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Abit AA8 DuraMAX - Poor overclock
I purchased this mainboard soon after it was released and fitted it with
Corsair XMS2-5400 DDR2 RAM, P4 540 3.2E GHz CPU (D0 stepping), Abit RX600 XT-PCIE graphics card, and Creative Labs Sound Blaster Audigy2 ZS Platinum Pro PCI card. I have 4 x 250GB SATA hard disks in two RAID arrays (using the onboard RAID). I then added watercooling using Asetek blocks on the CPU, VGA, and NB. The best semi-stable overclock I can manage is about 240/3840 MHz. This is done with the following settings: VCo 1.6125V, DDR2V: 1.90V, NBV: 1.70V CPU temp at idle: 45C, CPU temp at load: 56C, Ambient temp: 25C On very hot days the CPU full load temp approaches 60C, whereafter the machine normally crashes. Whilst I can get into WinXP at 245 MHz it will not run stable under full load. Considering the speed of the DDR2 and that the temperature is still within acceptable limits, I'm disappointed with the poor overclock ability of my setup. I suspect that the overclocked PCIe bus might be at the root of this problem. Maybe the graphics card is sensitive to the overclocked frequency. Or maybe the SATA disks cannot handle it. Reports on the internet about the AA8 is a mixed bag regarding the overclock ability of this board. Some good, some bad. Am I missing something? PS: I have the latest MB BIOS (ver 1.8). |
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