Athlon 2100+ OC on Asus A7n8x Deluxe

[Nephilim]

I was kinda bored the other day and decided I would see how high I could get my XP 2100+ to go with air cooling.

I've never tried to OC anything since the days of the Slot-A Athlons so my experience with the T-bird and T-bred OCing is nil. I have a XP 2100+ (AIUHB) with a stock HSF on an Asus A7n8x Deluxe rev. 1.xx board.

I can underclock the CPU just fine by changing multipliers, but if I try to raise the FSB or the mulitplier to anything past 133mhz or 13x respectively the system doesn't POST. Is there something I'm missing? My ram should be able to handle the higher FSB just fine (unless I've forgotten what RAM I actually have...but it should be DDR400) and the system stays nicely under 40C as it is, so a little extra temp shouldn't be a problem.

I've tried raising the VCORE to 1.7, I've locked the AGP and PCI bus to their default clock speeds, what am I missing?

Any help is appreciated!

[john19055]

I'm not sure what the number is ,but is your cpu a throghrobred or is it a palomino,if it is the first then have you lowered the multipler to 10 and the FSB to 166 and raise the cpu voltage to 1.75 and see if it will boot at a lower multipler.

[Nephilim]

It'll boot at a lower multiplier, but only if I leave the RAM speed alone. I can boost the FSB seperately from the RAM speed. If I jack up the RAM speed any, no boot.

[Dazz]

The stock HSF will limit your overclocking quite a bit.

[Nephilim]

Yeah, but it shouldn't cause the system to no POST. It's very odd.

[john19055]

When you set the multipler to 10 what is the highest your FSB will go before it wont boot and have you raised the Ram dim voltage or do you not have that option.

[Nephilim]

The voltage on the RAM is set at 2.5, I haven't changed it. I cannot raise the RAM speed above 133. If I do, the system won't POST.

I don't know if this is a factor or not, I have the RAM running in Dual-Channel mode. Would that make any difference in OCing?