no you have to go to the bios and set the NB volt your self every p35 motherboard has this problem what is your fsb right nowIQT786

It isn't a P35... unless i'm missing something. fsb is 1333 MHz (I have a Q6600 overclocked to 3.0 GHz from 2.4 if that matters, bus speed is set at 333 MHz)

whats your north bridge voltIQT786

No idea, would you know of a program to monitor it? (in the BIOS it automatically optimizes voltages, so it doesn't say what they are)

1 of your ram is bad or more check them 1 by 1 see if you get a blue screen i used to have this problem wean i had 3 sticks of corsair ddr2 1 ram was bad i used to get bluescreen and wean i take that ram out i dont get any blue screensIQT786

I've run memtest with all 4 sticks of RAM in and I got lots of errors, but when I tested them all individualy they came up with no errors. I'm pretty sure my MB simply can't handle 4 individual sticks at 800 MHz, because i've seen others with my motherboard having the same problem as mine, and the fact that as I lowered the speeds on the RAM it slowly became more and more stable. MB is a Gigabyte 965P-DS3 btw

As the title says, I have 4 1GB's sticks of RAM in my computer at the moment, and running at their stock speeds (800 MHz) causes my computer to blue screen. But if I run them at 667 MHz the blue screens are gone, so if I installed 2 2GB sticks of RAM in my computer, would this fix the blue screens? (I think this is less stressful on the motherboard?)

Yep...try those:D i have a feeling it might be the low stock fan speed on your card. I have the 4870 and it would get very hot as well.

cheetfreak

Tempeture on the card isn't a problem, I have a custom cooler installed on it and at full load it only gets to 57C. Just installed the new drivers, but I don't have time to test them tonight, too much homework :x will bump this tomorrow if I still have problems.

have you installed the lates version of CCC for your 4850?cheetfreak

Yeah, have the latest drivers for all components

I have Vista 64-bit and these specs:

Q6600 @ 2.4 GHz

4 Gig's of RAM @ 800 MHz (4 X 1GB's)

HD 4850

Creative X-Fi Xtreme Music sound card

Gigabyte 965P-DS3

The time before the blue screen occurs varies, when playing TF2 or Crysis Wars I can sometimes play only 1 match before a blue screen, or more than 3. Have tried installing and reinstalling with driver cleaner pro the latest drivers for all components, and have tried underclocking the RAM. Any help would be appreciated :)

BSOD Log:

Additional information about the problem:
DRIVER_IRQL_NOT_LESS_OR_EQUAL
BCCode: d1
BCP1: 0000000000000000
BCP2: 0000000000000002
BCP3: 0000000000000000
BCP4: FFFFFA6001053C94
OS Version: 6_0_6001
Service Pack: 1_0
Product: 768_1
tcpip.sys
Files that help describe the problem:
C:WindowsMinidumpMini101208-04.dmp
C:UsersKyleAppDataLocalTempWER-39437-0.sysdata.xml
C:UsersKyleAppDataLocalTempWERD3E1.tmp.version.txt

and one more log:

Additional information about the problem:
DRIVER_IRQL_NOT_LESS_OR_EQUAL
BCCode: d1
BCP1: FFFFCE807198A418
BCP2: 0000000000000002
BCP3: 0000000000000001
BCP4: FFFFFA600105C206
OS Version: 6_0_6001
Service Pack: 1_0
Product: 768_1
tcpip.sys
Files that help describe the problem:
C:WindowsMinidumpMini101208-05.dmp
C:UsersKyleAppDataLocalTempWER-43664-0.sysdata.xml
C:UsersKyleAppDataLocalTempWERD087.tmp.version.txt

EDIT: forgot to mention, happens only when playing games that stress the GPU, I occasionly play Roller Coaster Tycoon 2 (older game that hardly stresses the video card) and it runs fine. Also don't think it could be a hardware problem, have ran Windows XP with this same setup (only with 2GB's of RAM, and have used memtest to check if the RAM is bad and came up with no errors)