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Thread Starter 
Hey. I'm new to overclocking so I'm not looking for anything too advanced. Just want to get a bit more performance out of my slowly aging components and buy new stuff if necessary. I have:

i7 930 2.80GHz
HD 5850 1024MB
24MB DDR3 RAM (not sure how the other RAM specs work)

My case is the Antec Three Hundred with stock cooling
PSU is Ultra LSP750

3DMark test:

So is there a major bottleneck here? I heard that the PSU isn't very reliable but I'm not sure which one to get. Besides that, it seems the graphics card is my main problem, but I don't know what the best decision would be given my current hardware (do I need cooling / new card / etc).