Gigabyte GA-MA770T-UD3P & freeze

Hello,

I have some problems with my mother card (GA-MA770T-UD3P).
I've already read this topic: http://www.tomshardware.co.uk/foru [...] _12_0.html

When I play to a game my PC freezes after ~15minutes.
I try to increase Voltage of DRAM (2V), VCore (+0.100) and PCIE (+0.100) but pc freezes too.
I try to increase by one the PCIE Frequency (100 to 101)
I try to plug only one DDR3 => pc freezes too.


My configuration is:
- G.Skill Kit Extreme3 4 x 1 Go PC12800 Trident Series (8-8-8-21 and 1.65V)
- AMD Phenom™ II X4 810
- OCZ StealthXStream - 500W
- 9500GT

Thanks to help me