I have recently bought a 7850 2GB but it's being heavily bottlenecked by my AMD 630, I'm looking for a CPU which is under £100 which would get rid of or at least reduce the enormous bottleneck I am receiving now.
You cannot get a 1090t for anyway near that price man.
If you wanna upgrade you're gonna have to both replace the board & processor. I would save up, and if you could, maybe you'll be able to buy a Core i3 & a board for it soon enough, I don't know the pricing for it in euros/pounds, so I'm sorry.
Can't you get a 1090t for that price? I front one on amazon tho?? Maybe it was used? Anyway I also thought an i3 might be a good aswell and a cheap mobo because that's a cheap and good upgrade. On.y thing then is that you'll have to get ram because its DDR3.