The are a decent number of games that can use more than 2 cores, but in total they are a small fraction of all games produced every year.
There are even fewer games that can use 4 or more cores. Battlefield 3 can use up to 6 cores (not sure about 8 though), but only in multi-player. In single player mode it only uses 2 cores. I believe ARMA II and Flight Sim X can use at least 6 cores.
If you play online games, then chances are they will probably use more than 2 cores. BF3 uses the Frostbite 2 engine so any game the uses that engine should also use more than 2 cores when playing multi-player online games. Future games that I am aware of which will be using the Frostbite 2 engine are (unless they get cancelled):
Command & Conquer
Dragon Age 3
Battlefield 4 (actually might even be an updated version of Frostbite)
Mass Effect 4 (not the official title name and no official release date. 2015???)
Stock clocks on the 8350 are higher than the 6300. So even if you only use 2-4 cores for gaming, out of 8 or 6, the 8350 will be a little faster. However, the 6300 can easily overclock to 4Ghz like the 8350 and then you'll be talking equal performance. If you look at most benchmarks, there's not too much advantage in going 8350 anyway. And really, this is only for CPU bound titles, which are not terribly common.
What will definitely increase your gaming performance is an upgraded video card. So if this is a new build, put the £50 into the next tier up video card and get the 6300. In other words, an 8350 and a 7850 will perform worse than a 6300 and a 7870 Tahiti.
firstly if you look the budget then everyone would pick an FX 8350 than a 3930k or a 3770 because of the budget!although i have made some tests and at 6\10 the i5 sees to be going better even having two cores less!one test was cinebench in which i5 (not a rendering cpu)did better so i would go for the 3570k unlocked and powerful!
I want to upgrade my computer but I don't know which is better
People have said that games only use four others have said games will start to use more cores but is the £50 price difference worth it
If it's only for gaming the 6300,if you use it for varied tasks and/or multitasking then the 8350.
I'll agree with arpee on this. I got the 8320 (Yes, I know it's not an 8350, but basically the same thing). If all you will be doing is gaming, than yes, go for the 6300. HOWEVER, If you will be recording, streaming, and/or rendering out video files for youtube, etc. than I would go with the 8320. End of story. It all depends on what you are planning on doing and/or what you might decide to do in the future. If you can find a deal and it fits in your budget than go with the 8320 or 8350. There are awesome deals on microcenter on all the FX models and APUs. http://www.microcenter.com/site/products/amd_bundles.as...