Maximum Stable Overclock
237MHz (948MHz Bus) / 18.5% Delta
237×18 = 4266MHz
|Sandra CPU Dhrystone ALU (MIPS)
Sandra CPU Whetstone FPU (MFLOPS)
Sandra CPU – ISSE2
|Sandra Memory Float (MB/s)
Sandra Memory Int (MB/s)
|Half-Life 2 – Avg FPS
Half-Life 2 – Low FPS
Half-Life 2 – High FPS
Though the ABIT AG8 stopped overclocking at 237MHz, the results are very similar to the Asus P5GDC-V (comparisons of all results will be done at the end of this article). 3D performance has no real clear gain from system overclocking as seen by the minimal improvement in the average and lowest frame rate. However, by overclocking, CPU and memory performance increased by about 17.5% which would be useful for intensive desktop applications.
Ambient Temperature = -11C / 12F
Though the ABIT AG8 was the best performing overclocker at 14x multiplier, it falls short at the default 18x setting – it’s a bit unusual. Typically when overclocking you get a few settings beyond your optimal that are nearly stable, like how we saw 239-243MHz nearly stable on the Asus P5GDC-V. The ABIT exhibited no such behaviour. Once crossing the 237MHz mark, the computer would stop POSTing all together! I found it unusual that 237MHz works great, but anything above 237MHz is a blackhole.
What is a bit more odd is the fact 238MHz is not a selectable frequency! If you put 238MHz in the BIOS, upon rebooting the frequency will jump up to 239MHz and fail at POSTing.
There is something very unusual happening on the ABIT AG8 and updating the BIOS to v19 did not help.