Amazing mobo,
I oc my Sempron64 3000+ up to 2.6GHz (306x8.5) with latest bios, although I had to do it from Windows. ClockGen and A64Tweaker is all you need.

memory (DDR400 2.5c):
3-8-8
tRC:8
tRFC:16
Max Async. Latency: 5ns
Read Preamble time: 6ns
Idle Cycle Limit: Enable
tWTR: 3
tRTW: 2
freq 200Mhz
tREF 200Mhz(15.6us)

set HTT to 3x
set CPU multiplier to 8.5

A64Tweaker
Set freq to 166MHz and Apply
Set tREF to 166mhz(15.6us) and Apply
ClockGen
Raise FSB 'til memory reach almost 200Mhz
A64Tweaker
Set freq to 133MHz and Apply
Set tREF to 133mhz(15.6us) and Apply
ClockGen
Raise FSB 'til memory reach almost 200Mhz
result:=2.6GHz

Amazing mobo,
I oc my Sempron64 3000+ up to 2.6GHz (306x8.5) with latest bios, although I had to do it from Windows. ClockGen and A64Tweaker is all you need.

memory (DDR400 2.5c):
3-8-8
tRC:8
tRFC:16
Max Async. Latency: 5ns
Read Preamble time: 6ns
Idle Cycle Limit: Enable
tWTR: 3
tRTW: 2
freq 200Mhz
tREF 200Mhz(15.6us)

set HTT to 3x
set CPU multiplier to 8.5

A64Tweaker
Set freq to 166MHz and Apply
Set tREF to 166mhz(15.6us) and Apply
ClockGen
Raise FSB 'til memory reach almost 200Mhz
A64Tweaker
Set freq to 133MHz and Apply
Set tREF to 133mhz(15.6us) and Apply
ClockGen
Raise FSB 'til memory reach almost 200Mhz
result:=2.6GHz



Attached thumbnail(s)

Yeap,
I‘ve tried that bosskiller bios 1.0 you send me, but I‘ve gone insane listening that floppy drive during constant rebooting while oc-ing, so I flashed back to bios 1.5 that came with the motherboard and I managed to achieve 2.6GHz. I did the same with 1.7 too.
To mention that I left the core at 1.45V so this is not the limit, I just have to time to play any more.

I think that the problem in oc-ing this mobo from bios is in the order of applying clocks while booting. I was not able to oc just by setting memory to 133 and FSB to 300. I always had to keep memory clock above 166mhz.