overclocking problem - BIOS checksum error..

[Monkey Puzzle]

Hi, just been overclocking my machine - 4300, 4x1gb GeIL ULL 6400 RAM, Asus p5k deluxe MB, watercooled. I got it up to 3.33 (370 x 9) at 1.4825 (1.) and it's 30mins orthos stable so far, with load temps of ~62-63 by TAT.

I tried seeing whether the chip could go to 3.375 (375 x 9) and after blackscreening on lower voltages got it to get into windows and run orthos at 1.5625v in Bios. It ran Orthos for a minute before blackscreening and rebooting, after which the machine came up with a BIOS checksum error screen. After rebooting it seems fine at the earlier setting of 3.33 GHz. Is the bios checksum error screen something I should worry about? (BIOS is version 0404).

 

[MiNxYyY]

i think Checksum error is Memory related,have you upped the voltage?

 

[Vigoro]

Make sure you change the timings on your ram and lower the clock of the ram

 

[Monkey Puzzle]

Oh right okay - memory is running at 1:1 so would have been at 750 MHz at 4-4-4-12 (it's rated for 800 at 4-4-4-12). Thanks for your replies.

 

[Pneumonic]

what voltage are you running your NB, VTT and RAM at?

 

[Monkey Puzzle]

These are my settings at present. Any suggestions on where to go from here?

 

[TechMeh]

CPU voltage seems a lil high, what CPU are you using, you may also want to tweak NB and SB voltages and maybe PLL BUT DONT EXCEED 1.6 or 1.4 (depending on CPU) if you want your CPU to be... dead

 

[Monkey Puzzle]

cpu is a 4300 - had run 2hrs orthos stable at 1.475 vcore but failed intel burntest so increased it. So should I just set PLL, NB and SB to lowest voltages and then work up?

 

[TechMeh]

Right, in regards to my last post, dont touch the PPL, Increase your NB and SB voltages from there default value,

Good Luck!

also ive heard reports of people hitting 3.5Ghz with this chip

 

[Pneumonic]

set your FSB to Northbridge Strap to 333mhz