Help OC'ing a 939 3000+ on an Epox 9NDA3+

[finagle69]

recently bought:
A64 3000+ 939
Epox 9NDA3+
Thermalright XP-90 for cooling
running Geil Golden Dragon PC3200 1G(2x512) in dual channel mode.

i had a Barton 2500+ @ 3200+ on an abit NF7-S, so i know a little bit about OC'ing, though, admittedly, it was very easy on the old settup. i understand the multi's are locked on these 939's, and mine's at 9. 9x200=1.8GHz. that much i understand.

in the BIOS, i was looking for a 5:4 or 3:2 divider for the ram so i could try to push the clock to 2.5ish while keeping the 1000HTT. but i can't seem to find it for the life of me.

any suggestions? i guess i need someone to hold my hand through this

 

[finagle69]

bump

there's a CPU Overclock in the Power BIOS options, but i can't get it to boot to windows past 215MHz. i assume that's the fsb oc, because there's a section in the ram settings to hold the ram at 200MHz or other speeds. i can't quite figure this thing out :/ furthermore, from the reviews i've read, they should show multi's from 8 to 25, mine only shows 8 and 9.

 

[scorpion2k4]

You only get max. 9 because you have a A64 3000+. Regular A64 have only lower multipliers unlocked (for C'n'Q to work). Only FXes have the full range of multipliers unlocked and you can select a higher multiplier than the default one.

 

[jpeyton]

Look in the section of the BIOS with all the memory timings for a memory clock setting. It should give you options like Auto/133/166/200. Those are the ratios; 200 = 1:1, and it goes down from there. Because you have a 9x multiplier, you'll need a 267MHz FSB to hit 2.4GHz, 278MHz FSB to hit 2.5GHz, and so on.

If your RAM is good for 230-240MHz FSB, set the memory to 166. If you want to be on the safe side, set it to 133. Then start clocking up your FSB. If you have SATA hard drives, you will want to put them on the SATA ports that are locked.

Set your AGP speed to 67. By default, it's set to 66 and for most motherboard you need it set to 67 for the AGP/PCI lock to be activated.

You have good aircooling, so keep an eye on the temps. Over 65C and you're probably getting too hot for comfort (although still well below max).

You can up the core voltage to 1.65~1.7V max if needed, but keep and eye on those temps. Some people say 1.7V is too high for air cooling; others say it's fine.

I would set your HTT ratio to 4x or 3x if you're having stability issues.

 

[finagle69]

how do i know which SATA ports are locked? i've read that on most boards, 1 and 2 aren't, so i used 3 and 4

 

[finagle69]

ok, it was the SATA ports, moved it to port 1 and am running at 267x9 for 2.4G

bad thing is, my vcore is at 1.568V max. Vagp at 1.616, chipset at 1.744, and vdimm at 2.784. it loaded at 39C when running NFS Underground 2 for about 15 minutes with no glitches. but fails Prime within 2 minutes :/ not sure what else to tweak.

 

[jpeyton]

Kick that VCore up to 1.6 or 1.65. Your temps look great if they're accurate.

 

[finagle69]

that's the thing, i can't kick the vcore up any more the default vcore of the chip was 1.4. then choosing +.20 kicked it up to 1.568 which you see above. really need a modded BIOS to allow for a higher vcore, cuz i know it can handle 1.7+. my barton 2500 was running at 1.75V to get it to 3200+.

ps. thanks for your help and advice btw, i really appreciate it.