If you need to upgrade for skyrim, consider this new TH's article:Picking A Sub-$200 Gaming CPU: FX, An APU, Or A Pentium?
This article shows that Pentium G630 @Stock is able overcome the FX-8120 @4.2GHZ (G630 is 3 fps better at min fps) at the game you want to play, this open a very cheap path upgrade for you. (And this test is at Ultra setting, @1080p, all maxed, FXAA, 8x AA, 16x AF...)Intel Pentium G630 Sandy Bridge
- $79.99GIGABYTE GA-H61M-DS2
- $52.99Patriot Signature 4GB 240-Pin DDR3 SDRAM DDR3 1333
- $17.99HIS H667FS1G Radeon HD 6670 1GB
- $74.99 + $6.98 Shipping ($59.99 after mail-in rebate card)
Couldn't you assemble it?
Roughly: USD 220,00 with shipping and mail-in rebate