Weird Error in Memtest86 - Please help

[Lusiphur]

Mobo - ASUS P5K Pro (flashed to latest 1303 bios)
CPU - Intel E8500 Wolfdale
Memory - Crucial Ballistix PC6400 DDR2 (4x1 Gig Sticks)

Everything is at stock values (no overclock).

Ok, I have been getting random crashes in games so I decided to run a Memtest86 to see if I have memory issues.

I fired up Memtest86 and it reboots on the second test (Test#1, test own address). Which cant be good.

So I pull all the DIMM's and put one back in. Memtest is fine (left it running for a bit).
Put another DIMM back in. Still fine
And another. Still ok.
Put the fourth DIMM back in and it reboots on the first test again.

So, I figure that we have a bad DIMM. Pull them all again and put the last one added in on its own. Memtest runs fine.
Start adding DIMM's back in one by one until yet again, when there are four DIMM's in the board Memtest reboots on the second test.

I have tried various combo's of DIMM + slot and it seems to be fine up to 3 DIMM's. The minute I add the fourth, boom (note the PC will boot fine into Windows 7 with 4 DIMM's).

So, I am either thinking, some weird BIOS configuration issue or I need a new motherboard (hope not)

Anyone got any suggestions ?

 

[JonJ678]

Increase the northbridge voltage a couple of notches.

 

[Lusiphur]

Upped it to 1.41 (from 1.25, in steps). Same issue every time.

 

[Lusiphur]

Sigh, I was using version 3.5 which must be buggy.

The tests work fine with version 3.4 and version 4.0

Still crashing the minute I put AA on in any game though ...