Abdelrhman Fayyad said:
I have a low budget only 600$ and I wanted to upgrade the mother board and the cpu ,I was thinking about getting a new z77-ud3h with i5 3570k and 2 kingston hyperx 4GB and i already have an ocz power supply 500w and the 6850 toxic
You could save a lot by choosing a B75 MOBO and an i5-3570 (non-k version). If you did that, then you would have about 300$ or more left to buy a new GPU for. If you sold your old GPU you could afford a GTX 670 or a Radeon 7970! Also just might add another stick of RAM.
Don't be afraid that you can't overclock. Overclocking is mostly only for bragging, and doesn't add up performance as much as you would think. A lot of people buys expensive z77 MOBOS and unlocked CPUs and never overclock the CPU.