I just put together a new system for a friend and we are trying to overclock the FSB, it's a nice rig:
AXP2500+ (Coolermaster Jet 7 HSF)
Asus A7N8X Delux mobo (nForce2 Ultra 400 chipset)
Corsair TwinX CMX512-3200C2PT (1GB)
Two SATA Barracuda V 160GB HDD in Raid 0
ATI All-In-Wonder 9800PRO
Antec Trueblue 480W PS
I'm trying to get 200+ FSB out of it, but dosen't want to work, I've tried:
8.5 X 200
9 X 200
9.5 X 200
10 X 200
I'm still running the OEM BIOS, newegg.com said the mobo would only support the 3200+ with a BIOS update, is this the same reason it's not supporting 200MHz FSB for me?
I'm running without any problems at 12.5 X 166 now and maintaing CPU temps around 56C
First of all A7N8X DLX doesn't use nForce2 Ultra400 chipset. Second, You should flash the bios, however without flashing you still should hit 200FSB. Flash bios, then check if it still doesn't work, then you got a mobo with a chipset that's extremely undervolted.
I don't have your mobo, but from what you write the newegg.com people said you needed bios flash (generally you turn a 2500+ into a 3200+ by upping FSB to 200, so yes you need to flash bios although I thought those boards came OEM with the ability to do 200 FSB).
I note that you must have an unlocked 2500+
Why not leave CPU with stock multi and incrementally work your way up to FSB 200. Or have you tried that (incrementally) and no go?
I'm guessing that Ram is running at FSB 200 (pc3200) hence your system is asyncronous right now?
EDIT: You may need to bump up the voltage a bit to get it to FSB 200
MSI KT3 ULTRA-2 KT333
Maxtor 60GB ATA 133 7200RPM
ABIT G4 Ti4200 OTES 64MB
Win98SE<P ID="edit"><FONT SIZE=-1><EM>Edited by Coyote on 12/09/03 05:17 PM.</EM></FONT></P>
<A HREF="http://usa.asus.com/products/mb/mbindex.htm" target="_new">Asus</A> proves me right, so newegg can go screw themselves, I think I do know what i'm talking about. The Ultra 400 chipset is only for the sh*tty A7N8X-X.
FSB 400 Support
Starting from PCB version 2.0, The A7N8X motherboard supports Front Side Bus
(FSB) 400. The PCB (Printed Circuit Board) version is located beside the
motherboard name printed on the motherboard. PCB 2.0 BIOS version or later are not compatible with PCB 1.06 or earlier BIOS versions.]
First things first Flash that mobo to the latest version for your PCB. Next SLOWLY increase fsb with low multi (9 or 9.5, watch 9 though as my mobo's 9 is actually 11). Then slowly increase multi with low fsb (166). That will give your limits and then you can fool around in the range.
Sure enough it does, but in my dealings with Asus their full of (*&* half the time anyway. I don't/wouldn't believe a damn thing on that website even though they manage to make a good mobo every now and again.