EP45-DS3R with 8gb RAM Problem

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Hi

I have a EP45-DRS3R with 4*2 gb corsair dhx 800 mhz ram 1.8 v jdc 5-5-5-18, running with 1:1 at 400 fsb, with a q9300 cpu.
Voltages are stock/manual, and i am experiencing memory unstabilities running occt blend test.
I have tried upping the mem voltage to 1.9 v no luck.
THe mobo is running with trd 9.

Please, nead advice how to stabilize ram.

 

[ferencster]

sorry bad category please delete