Qualified Vendor List or Memory Producer Compatibility List? Who to trust to be sure?

[lukx]

I need new ram for my P5W DH Deluxe. I have problems with Corsair twinx6400C4 4GB. It showed errors in memtest but when tested on another mobo no problems.Also different memory also no errors on my asus. So when buying new ram whu I should trust QVL of ASUS or for example when buying crucial I shoud trust it's memory advisor tool? P5W DH QVL list doesn't show that 800Mhz memory form crucial supports all 4 slots in dual channel mode while crucial says that I can get their 800 balistix?I also don't understand why on asus QVL there is memory name but there are empty space (without any tics) under it's compatibility with Dimm socet compatibility. How to understand that? What do you think?

 

[DaveSimmons]

Crucial guarantees their RAM will work if you use their memory selector and buy direct, so it's risk-free if you plan to run at stock speed.

 

[lukx]

but will it work with all combinations? I mean for example 4 slots (8GB) in daul channel.
They could just show compability with two or 1 slot.