PC randomly rebooting after flashing the BIOS and changing the RAM timings

[Oobie-]

Hey guys,

So I updated my BIOS to v 1004 and thus changed my DRAM timings to 4 4 4 12 @ 2.1v manually. Now when playing CS I have lost connection 4 times, on one account the sound messed up and rebooted.
Prior to the flash and the DRAM timings of 5-5-5-18, this didn't happen.

Any ideas as to why it could be crashing?

[IAmATeaf]

Obvious question but what happens when you put the timings back to 5-5-5-18? Also did you reset the BIOS to defaults after flashing?

EDIT: Only do the reset if your RAM can boot at normal/auto RAM voltages or you might end up in a pickle.

[Supershanks]

Any ideas as to why it could be crashing?

tightening the timings
what fsb & strap are u using??
1) does it do trhe same if u put timings on auto or 5-5-5-18
2) Have you checked stability using orthos with 4-4-4-12
3) to run with tighter timings u may need to increase vdimm

[Clunk]

Clear the cmos with the jumper + take battery out.

[Oobie-]

IAmATeaf -
I changed the timings back to 5-5-5-18 and it does the same thing
I also checked the option to clear cmos settings in the asusUpdate window before you flash the BIOS.
Yes my RAM can boot at normal/auto voltages. Come to think I think I left the DRAM volatage at 2.1 on 5-5-5-18 ddr2 800

Supershanks-
FSB = 1066
Whats a strap? :$
1) I put it back to 5-5-5-18 and I have left it on 2.1v (I shall change that when I finish this post )
2)I ran memtest at 4-4-4-12 for about 30 mins, it got through one pass and half way through the other, there were no errors. I shall run orthos overnight then?
3)This ram is rated to run at 4-4-4-12 @2.1v so I am reluctant to think its the ram.

I shall do that now clunk

My Temps are about 50C when I manage to check the temp (can't believe its so high for an aftermarket HSF (I have also reseated it 3 times)
My mobo is about 43C (according to asus probe and the BIOS), although when I touch it, its as if I am putting my finger on an electric hob which has been on for about 20 mins....

BTW It crashed again, and Asus Probe said "warning vcore voltage an issue" or something to that point (it rebooted before I could read it properly)

[Clunk]

Hold on, what is set to 1066 exactly?

[Oobie-]

The FSB is 1066mhz in the BIOS clunk.
At least thats what it says.

[Clunk]

set the cpu to 266 and the ram to 533 and try again

[Oobie-]

CPU is and was always at 266, and the RAM is PC6400 when you boot. Even when I first put it in. BUt I shall put it to 533.

Am I correct in saying that once you change the FSB, say to 280mhz, does the ram speed change too, or is the RAM mhz independent?

[Clunk]

The P5B quite often shows the ram speed wrongly at post, dont worry about that.

Yes, when you up the fsb, the ram changes as well, so 280 will give you 560mhz for the ram...just double it.

Also, keep in mind that if you do any overclocking, even a bit, and you leave the vcore on auto, the board will just give the cpu what it thinks it should have, so quite often, you will end up with more volts than you need and higher temps. the easiest way is to lock the vcore quite low and see how far you can go until it fails orthos, and either back off the fsb or add a touch of voltage as needed

[Oobie-]

Right-o

I left Orthos running overnight with default/auto everything, apart from the vcore, which I manually set to 1.2500. Temps were about 50C. No errors



I then rebooted and changed the RAM freq to DDR2 533 and booted back into windows. Then I was greeted with this error:


(I clicked to show the details of it)
Not sure if its related or not, but I thought it would be good to show you.

The FSB: DRAM ratio is now 1:1 and the timings are 4-4-4-12@auto voltage, 266.7mhz

I will take out the CMOS battery and set the jumpers now.

[Clunk]

can you do a screen shot of your bios for the main screen where you change the ram divider, and one of the ram timings?

[Oobie-]

Would that be in the Nbridge configuration option, where you disable the "Allow DRAM freq to be configured by SPD"?
(not quoted)

[Clunk]

Yes, thats where the timings are, and the main screen where you can change the fsb, one of that as well.

[Oobie-]

FSB:


Jumper free config:


Ram timings:

[Clunk]

On the first screen, change them all to disabled.

leave the second screen on auto for the cpu voltage while its at stock speeds for now.

on the last screen, you may need to enter the subtimings, the last few that are 10 and 11 values, maybe the geil website will have those?

Also, disable legacy usb in the bios, this can make you fail memtest.

Does your ram definately do the 4-4-4-12 timings? If thats what it is rated at, set it to that, and whatever voltage it is supposed to have.

Run orthos overnight again and see if it errors, and also, run memtest.

If you manage to pass orthos and memtest, you can up the fsb a bit, keep an eye on the temps if the vcore is on auto.