error in Prime95

Barton 2500+ @ 2.21 GHz 11 x 200fsb
Abit NF-7s
2 x 256 Buffalo Tech pc3200


CPU FSB/DRAM ration 3/3 (400MHz)
AGP Frequency 66 MHz
CPU Interface Enabled

CPU Core Voltage 1.95
DDR SDRAM Voltage 2.6
Chipset Voltage 1.6
AGO Voltage 1.6

I ran Prime95 to see if the computer was stable or not and in the first 5 minutes got this error Fatal Error: Rounding was 0.5, expected less than 0.4.

I guess this error means that my computer isn't stable, but what is it exactly?

And what do I have to change to make the computer stable?

Please review this thread:

http://www.ocforums.com/showthread.php?s=&threadid=234632

What are your CPU temps? Unless your barton is one of the older ones, you won't need that high vcore to reach 2.2GHz. check the timings you're running, lower them and see if you can pass then.

The point of testing is to see if you get errors or not thus testing the stability. The meaning of errors themselves is not as important.

To get it stable (besides lowering the overclock ), increase Vdimm and or Vcore voltage, get better cooling (for both CPU and case), get a name brand Power Supply.

If that doesn't help, new mobile Bartons are overclocking champs.


Which version is your Abit mobo, 2 or 1?

i have a version 2 nf7-s

and the v-core is cpu core voltage? and vdimm is chipset voltage?