Is my PSU enough?

W

Wastedfun

Geek Trainee
Ok, I tried to search for similar setups but I just built a new rig and recently upgraded my ram. When I put the new ram in I have issues.

My specs are below, before everything runs fine with 4GB of DDR2 RAM (2x2GB sticks) but with 8 everything goes to hell. IF it boots, windows crashes. I run Memtest and get errors.

I know the new RAM is good because I swap it out in place of my old ram and it runs the same. Memtest pass and everything.

anyways, Specs (with the extra RAM installed):


Full Tower ATX
nForce 680i SLI ATX Motherboard
850W PSU
8GB of DDR2 800 (pc2 6400) RAM
Intel Core 2 Duo E6750
500GB WD sata HD X2
GeForce 8800GTX 768MB 384-bit GDDR3 SLI Video Card X2 (well, the second card is by MSI, the "OC" version)
Triple monitor setup + 61" HDTV DLP cloning the third monitor (for movies)
2X22" Envision
1X19" Hanns-G

Is the 850w PSU enough to run everything? is that why Im having problems? If so what PSU should I get to run everything? If not, any clue as to why it wont run the full 8GB?

Im also running Vista ultimate, 64bit. I know its not vista's issue because sometimes the issues starts before any windows booting even starts.

Thanks for your time.
WF
 
I don't think it's a psu issue. 850w is more than enough to run your system. I'd be inclined to think it is a ram problem. Im sure ive read about this problem, when you fill all the ram slots on a mobo, quite recently.

Now where did i read it :(

I can't find the original article that i read. However i did find many articles relating to 8gb memory problems with vista 64bit.

If you go into the bios on start-up how much memory does it say you have.
 
I checked the ram. I ran two stick at a time, tested each to the max and checked up fine. It only has issues when all 4 sticks installed
 
Maybe your motherboard has an issue with one of its RAM slots (hopefully its not the case because replacing that motherboard would suck!). I always found that filling up all the RAM slots was a problem for me.

JUST INCASE it is a pwoer supply issue, which i doubt since 850W is more than enough to power up your pc, go here to calculate the amount you need to run your pc:

eXtreme Power Supply Calculator Lite v2.5

Simply enter your hardware settings accuralety and get your results!
 
Oh yeah, that power supply is definitely plenty. Normally Rosewill is something I'd stay away from, but that particular unit has been reviewed and is a solid unit.


I Googled what yorkkev was talking about and it's an issue that is out there.
First, make sure you're all patched up with the latest updates and then make sure you have the latest drivers for everything. I'd also recommend flashing the latest BIOS for your motherboard if you don't already have it.

How well these work, I don't know, but that seems to be the typical response I'm seeing, and they aren't bad ideas either.
 
Big B said:
Oh yeah, that power supply is definitely plenty. Normally Rosewill is something I'd stay away from, but that particular unit has been reviewed and is a solid unit.


I Googled what yorkkev was talking about and it's an issue that is out there.
First, make sure you're all patched up with the latest updates and then make sure you have the latest drivers for everything. I'd also recommend flashing the latest BIOS for your motherboard if you don't already have it.

How well these work, I don't know, but that seems to be the typical response I'm seeing, and they aren't bad ideas either.
Click to expand...

I have updated everything and flashed my bios. I just dont get why it wont take it.

uhg
 
Have you tried dropping your memory timings to 5-5-5-5. I know that using more sticks of RAM sometimes require running slower/looser timings. I couldn't tell you specifically where in your BIOS, but you're looking for CAS-RAS-tRAS-tRC numbers. Any enthusiast-class board will have these and more, but these are going to be the first 4 values in most cases. The only thing that may come before it is the Command-Per-Clock/Command Rate. Speaking of which, if this is available, you may try setting this to 2 or Off depending on what options you have.
 
Big B said:
Have you tried dropping your memory timings to 5-5-5-5. I know that using more sticks of RAM sometimes require running slower/looser timings. I couldn't tell you specifically where in your BIOS, but you're looking for CAS-RAS-tRAS-tRC numbers. Any enthusiast-class board will have these and more, but these are going to be the first 4 values in most cases. The only thing that may come before it is the Command-Per-Clock/Command Rate. Speaking of which, if this is available, you may try setting this to 2 or Off depending on what options you have.
Click to expand...

Big B don't you mean 5-5-5-15?
 
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