P45 picky with RAM???

[bandsaw]

Further to some serious hair-pulling (older thread) that resulted in BSODs on Win7 x64 right, left and centre, I went back to some older 1GB Corsair 800MHz CL4 sticks and all was hunky-dorey again... Corsair replaced the 4GB set under warranty and within minutes of putting the replacement stuff back in, I'm back to BSODs referencing the same BCCodes as I was getting before.

I see from Corsair's own docs that the particular type of DHX RAM I have has PSC ICs, whoever the devil they are, as opposed to ICs from folk I know of like Micron, Elpida, Infineon, etc. I'll have to double check but I think the older RAM uses ProMos or Micron.

Is it conceivable that this particular implementation of the P45 (GA-EP45-UD3P v1.1) just doesn't like the PSC ICs???

[pardal51]

Silly Q: Did you try to boot with only 1 stick?

[Ulti]

Are you running 4 sticks of DDR2? It might be that due to running all 4 sticks at CL4 timings, this puts strain on the the P45 chipset and therefore you might need to bring up your NB/Chipset/MCH voltage by a tiny notch. This is the case with P35 motherboards for me, not sure how P45 is in this instance.

[bandsaw]

At this point, there's no such thing as a silly question!
Tried one stick. Tried different slots. Tried CL4 and CL5. Tried "fail safe" defaults. Tried "optimised" defaults. I've even tried shouting at the damn things.

It is only two sticks though - I've turned the MCH voltage up a smidgen (0.1V), just in case. The older XMS2 sticks work absolutely fine at precisely the same settings so it has to be something to do with the DHX sticks. It's not heat either - they don't get hot enough as they have ample airflow and they do remain pretty cool to the touch.

My next trick is to grab some Crucial/G.Skill/Geil/OCZ/PNY/Kingston/etc stuff and keep the ol' fingers, arms and legs all crossed.

[Keyboard]

Have you got the latest BIOS which may give you improved H/W compatability?

Is the make/type etc. of RAM on the mobo manufacturer's recommened list?

If not, are any of the recommended RAM type ones that are made using PSC type RAM chips? That may take some time researching, but if none of them are made with PSC IC's, then that might be the answer....

[bandsaw]

I have got the latest BIOS, yes.
Problem fixed now though - Kingston works a treat!