I've recently been getting the odd crash to desktop / blue screen when gaming.

Temps are all fine.

Prior to testing I've put all the speeds back to standard.

Memtest86: -

Testing all sticks individually - all pass

Testing them all at the same time - lots of errors on test 7

Any ideas?

GA-P35C-DS3R - F10
E6750
4gb Crucial Ballistix 2GB 8500C5 (4x1gb)
HD3870 512MB PCI-E

 

What do the event logs say?

 

nowt in the event logs - other than application hang or crash.

I'll have to take an image of the BSOD when it happens

 

Have you tried a BIOS update? Maybe an issue with the BIOS version and Dual Channel.

 

F10 is the latest BIOS revision

 

Have you tried the memory in non-dual channel mode to see if the problem persists?

 

sorted it. . .

The mobo was feeding the RAM 0.4v short of what it should be.
(ram runs @ 2.1 mobo was sending 1.7+/-

Increased by +0.4v and now passes.