Need input on new parts.

[tkananen]

Oh! and i forgot to add, would more ram and a better memory card make the games run smoother? Thanks

 

[tkananen]

Hey guys, last June i purchased a computer off of Newegg. It was a CyberPower 2098. The thing has been working fine...until borderlands. The game runs but lags at parts. I was planning on buying a better graphics card, power supply, and motherboard. My only problem was i did not know how much power i would need. I understand i need more for a better graphics and motherboard , but how much more? And can anyone suggest any better motherboards or graphics cards? I have around $300 to spend on all three so keep that in mind.
Here are the Specs-
CyberpowerPC Gamer Ultra 2098 (GU2098) Desktop PC AMD FX-Series FX-4100(3.6GHz) 8GB DDR3 500GB HDD Capacity AMD Radeon HD 6670 1GB Windows 7 Home Premium 64-Bit


AMD Radeon HD 6670 1GB
AMD FX-Series
CPU Speed
FX-4100(3.6GHz)
CPU Socket Type
AM3+
CPU Main Features
64 bit Quad-Core Processor