Asus p5k not booting with new DDr2

Hiya guys

I've got a self built PC with :
Asus p5k premium mobo
2x 2gb Geil 6400 ram
Wolfdale E8400 cpu

All been running stable with a slight overclock on the CPU for 3+ years.
Just bought 2x 2gb corsair XMS2 6400 ram.
I slotted them into the 2nd and 3rd ram slots, and the PC booted fine for the night.
When I tried it again today, it wouldnt even boot to the bios.

Taking the new ram out, and the pc boots fine.
If I put one of the sticks in slot 2, it boots fine.
Put the 4th stick in slot 4, and no boot.

So i'm thinking, a duff stick of ram!
I've requested an RMA from the shop I bought it, so that should be good.

The overclock that I had now wont boot though!
Its been so long since I have done an overclock, I cant remember the settings, so i've had to reset to the stock settings.

Has anyone else had this scenario before?

is it deffo busted ram? or has my overclock stopped it from working with 4 sticks?
5 answers Last reply
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  1. You didn't test the other way to know for sure. You should have tried 1, 3, 4 and checked if that booted. It's possible to have a dead ram slot.

    Also, because you were OCing with different sets, you should have checked to make sure the RAM settings were common to the lowest denominator. If you had ram settings at DDR2-800 with 4-4-4-12 @1.8v and the new ram is DDR2-800 with 5-5-5-18 @ 2.0v then you just needed to change the timings to 5-5-5-18 @ 2.0v.
  2. The ram settings where are 5-5-5-18 and 2.15v.
    I had to up the voltage during my overclock I think, to get things stable.

    Looking in CPU-z when I had three sticks in, the ram timings where all equal.

    I did try the RAM in slots 1,3 and 4, and that didnt boot.
    I'll try that tonight with the stick I think is working ok.

    The thing is though, If i put the three sticks i think are working in 1,2 and 3, it boots.
    Swap out the other new stick into slot 2, and it doesnt boot.
  3. Based on that information I would agree that you have a dead stick. RMA.
  4. Could my higher voltages have fried that one stick?
    it booted fine for an afternoon, and didnt the next day.
    On the stick it says 1.8v, and I am running at 2.15v.

    Its got a heatsink on the damn thing, so I wouldnt expect it to blow, but you never know!
  5. 2.15 is a bit high, but it *should* be able to handle up to 2.2v. Once you go to 2.2 you need to have active cooling. That is a rather high ram voltage, it could have damaged the stick.
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