Hardware which way to go

[MiRai]

WEI is fantastic for letting you know how great your system is going to Windows (for the most part). It's not a real benchmark of any sort and no benchmarking sites state how high of a score a CPU, GPU, SSD, etc achieves on the WEI.

You need to look at your Performance Monitor and GPU-Z when you are getting lag. You need to see if it's your CPU or your GPU that is the bottleneck (I'm going to say it's the CPU). If you're using DX11 then change it to DX9. The GTX 280 doesn't technically support DX11 and your VRAM will be better off in DX9. I doubt you're using anywhere near 8GB of RAM unless you're running a ton of shit in the background. I don't think I've ever hit 7GB of RAM usage while multiboxing 5 accounts and I run some fairly high graphics settings.

EDIT: To Add -- Could it be your HDD causing this lag? Sure, it could be. Everyone's definition of lag is different and you could just be experiencing textures loading slowly from the HDD if you've got a ton of crap on it or it hasn't been defrag'd. An SSD will not increase your FPS beyond what your computer is capable of. It will deliver the necessary information that the CPU and the GPU need to display what's on the screen. If the CPU and GPU are the bottleneck then the SSD will not deliver anything besides faster loading screens.