Need an Experts Advice....

[koolman007]

Hi,
i just bought an extra pair of ram to increase my current ram to 4gb.
my previous pair was
corsair pc6400 (5-5-5-18) @1.8v
and the new one is
kingston pc6400 (5-5-5-15) @ 2.0v .
Now since i have upgraded i had BSOD on a few occasions. I been using corsair but never had a BSOD before also i tried running Kingston on its own for a while but didnt encounter any BSOD either.
So i checked in the bios and both modules are running at 1.8v i think its something to do with the difference in voltage as kingston is being under powered .02v. If i go ahead and change it to 2.0v in bios will that have any negative effect on the corsair.
I will also try running memtest later on during the day and post it here.

here are my specs

E8400 CPU
680i SLI Mobo
280GTX 1GIG
SB Audigy
Corsair 650W PSU

 

[n7]

Definitely run Memtest86+.

You're going to need to find a happy medium between those differing kits.

That can be done by upping vDIMM, loosening timings, lowering frequency.

Which way you choose to go is up to you.

 

[LOUISSSSS]

Increase VRAM to 2.0. Run memtest for 24 hours. Then run p95 blend for 24 hours. If those 2 pass ur good

 

[koolman007]

ok here is a reply from a guy in another forums:

''You cannot run ram that have two different voltages it will be very unstable no matter what. Also overvolting your ram will have a very bad result besides stability issues you can easily burn out your ram. Its OK to run two different brands of memory but they HAVE TO BE same VOLTS otherwise major instability will be the result''

what are your views ?

 

[n7]

Definitely run Memtest86+.

You're going to need to find a happy medium between those differing kits.

That can be done by upping vDIMM, loosening timings, lowering frequency.

Which way you choose to go is up to you.

My views are to quote myself.

You've got non-identical RAM.
That doesn't mean it cannot work together, but it does mean you've got a challenge

If you're scared of the BIOS, i'd suggest looking @ returning your 2.0v new stuff & getting something 1.8v.

If you're not scared, like i said previously, you've got a few ways to make this work.

A little more vDIMM is unlikely to kill RAM, but it's likely out of warranty.
You want to get the two kits working with as little vDIMM as possible.

I'd be suggesting loosening timings or lowering RAM speed if you don't want to mess with vDIMM.

If your CPU is stock, that's 333 FSB, which means you can do DDR2-667.

Safest easiest bet for you is likely actually to put the RAM @ DDR2-667 5-5-5 1.8v.

Odds are good the new kit will work fine @ that speed @ 1.8v.

You could also try DDR2-800 6-6-6 (looser timings).

Or try DDR2-800 1.9-2.0v.

You've got lots of options!