Original timing at 1.8 5-5-5-18, but in my bios not possible to change timing.
So only way it is to change memory ration (4`) and then it shows 1066, but after some minutes to work or test at Prime95 get Hardware error !
Maybe i found solution about speed - update latest bios F12 - change ration to (4`) 1066mhz and start PRIME95 test - for now look stablish - but test continuing... but problem about windows or mother board recognizing of KHX8500D2K2/4G still exist - show me like i have PC2-6400, different softs: everst, cpu-z, memset 4.1
Any idea?