For the price range, you can't go wrong. I've paired this with a 7870 and everything run's fantastic, sadly most games aren't heavily threaded so they don't take advantage of multiple cores which is why i opted for the dual core with 4 threads. I'm expecting a performance hit when I'm going to play planetside 2 and BF3 multiplayer as these can use all the resources of a quad core. Overall, it's an awesome buy.
I bought this to go with an Asus P8H61-MX USB3 motherboard as a replacement for a dead ABit AN8-32X motherboard on my children's computer (one of my old cast-offs), and coupled it with 8 GB of Crucial DDR3 PC3-12800 RAM (2x 4 GB sticks). Putting that in the carcass of the dead machine (which was running Fedora Linux) resurrected it and resulted in a very respectable machine for an upgrade cost of under £200. Needless to say I was very happy with the result and it runs faster than I'd expected (my usual machine is an i7). My son no longer pesters me to use my machine because his own is too slow.
Cheap and low power, yet it packs a punch! The perfect CPU for a budget SFF build? This is(was) it! Haswell is obviously the one to get now, but if you can pick up a second hand one for 50 quid, go for it! I used this for gaming with a 7850 and it coped 100%. Recently upgraded to a i5 and 760 because I'm doing music production and needed extra horsepower.
This is a fantastic CPU, almost certainly the fastest dual core you can buy (apart from the other ivy bridge i3s, but what difference does 1Ghz make?). The difference between this and my brother's AMD Phenom x4 in terms of performance on games that are traditionally cpu intensive like GTA IV, is negligble. With a fast enough graphics card you can run it on max settings no problem. And as for games where you just need one or 2 fast cores (most games), my system is faster (we are both using graphics cards in the same price range). So if you dont want to splash out on an i5 but you still want a powerful Intel processor, look no further.