I've been getting terrible performance from my new build, such as only 35 frames per second on Battlefield 3, running on low, in 1440x900 resolution.
My system specs are:
AMD Athlon II X4 640 Propus 3.0GHz Powercolor Radeon HD 7850 2GB 16 GB DDR3 1333 SDRAM MSI 970A-G46 AM3+ Motherboard Windows 8 64 Bit
All of this is running off of an Apevia 650 Watt PSU.
I have a very similar system that has all of the same specs aside from a different motherboard and an AMD Athlon II X4 651K Llano 3.0GHz instead of the one stated above. This system has a much better performance on games, such as getting around 40 frames per second from Battlefield 3 on Ultra in 1680x1050.
What could be causing the poor performance on my new build? I have installed all of the latest drivers and also updated to the latest DX11 version.
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It could be possible that you haven't placed your ram in correctly.
make sure your mb bios has all the newest bios codes..check with cpu-z that your ram running at the right speed.