Help ! Can't get past FSB 1333MHz O/C

[nickhi]

I'm trying to overclock a Tbird 1000 (266) but have failed badly at 1.33GHz. I was managing to get stable 1.33GHz (133x10 1.8v 33MHz PCI, load temp 38C) but couldn't get higher. Any increase in either multiplier or FSB or PCI and the system wouldn't BOOT. This is particularly annoying when you can't get into the BIOS and have to keep discharging the CMOS in order to reset and try again. By the way does anyone know why the Graphics fails when just changing the CPU multiplier and nothing else ? I thought the AGP clock was linked to the FSB ? The Graphics card is a nvidia Geforce2 Pro.

I had imagined the KT7-A and Tbird 1000 (266) AXIA core would be a real breeze to get to at least 1.4 and above ! BTW the third line on the core starts with a K instead of a Y does this have any impact on it's capability to O/C.

I have upgraded the BIOS to version ZT but now can't even get it to BOOT at 1.33GHz it doesn't even seem to POST.

Any help or suggestions or clues to BIOS settings much appreciated.

AXIA0108MPMW (1GHz C part)
Global Win 38 Fan (People warn about the noise, but BOY !)
ABit KT7-A
256Mb PC133 Cas2 Crucial
Gainward Geforce2 Pro/400 64Mb DDR
MAXTOR 7200 20.5Gb
Creative 1024 Live
300W PSU

[Ridenow]

Welcome!

If you look in the CPU database on the home page, the average overclock for a 1000 Tbird is 1321 Mhz . What are your temps? Every chip and mobo are different, it is possible that you have gone as high as you can with your current setup. If the new BIOS does not like it, then go back to the old version or try a different one. I think there are 4 out.

[Willis]

I'm not sure which of the AXIA stepping processors are the high speed ones. I've got a 1ghz (266fsb) overclocked to 1400 (140 x 10) and I'm at my limit. Anything higher and it locks and/or can't even boot. Changing the jumper from 133 to 100fsb allowed me to boot and switch the multiplier. That allowed me to get back to a multiplier that would work when I went back to 133fsb. It's a pain, but it's better than messing with the CMOS.

I've seen some AXIA go way up there, but never without some serious cooling. I'm using a Swiftech MC462-A heatsink, which is very loud but able to keep me about 41C idle and 45C at full load. It seems the average is right around the 1400mhz +/- mark for the AXIA. Look at it this way, you got 33% more performance out of your processor for basically nothing!

Hope this helps!

[Hoot]

I can not stress this enough!
There was a run of KT7As that found their way into the market, which will not run their FSB greater than 133. I know, I bought one. I spent 10s of hours troubleshooting, including upgrading the PSU to 400W, adding PC150CL2 Ram, Adding better Northbridge cooling, trying different Video, NIC and Sound cards. Nothing helped. I took advantage of NewEggs 30 day, satisfaction guarantee and sent it back for another one. The second one ran an FSB of 150 Mhz, right out of the box, using the same components from the first one. Send the darn thing back for an exchange, while you still can!

Hoot