How to fix low FPS on Star Wars the Old Republic?

Ok, thought I could handle ToR with my NVidia 9800GTX+ with my 24inch Samsung LED monitor at 1920x1200 resolution. However, as I tried grouping with friends for my first boss I was at 3-5 frames per second, nearly impossible to tank with. Thus, with the support of my wife to upgrade my system I come to my fellow gamers.

What should I do to optimize my system? I've heard arguments both for the NVidia GTX 560 TI as well as the ATI Radeon 6950 are good options. I thought about adding in more RAM but I'm at the limit for my motherboard with 4gig DDR 1066 (2 x OCZ Platinum 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit), motherboard is about 5 years old. Is this a quick fix or is it just time to rebuild?



My dxdiag results:

Card name: NVIDIA GeForce 9800 GTX/9800 GTX+

Display Memory: 512.0 MB

Current Mode: 1920 x 1080 (32 bit) (60Hz)

Processor: Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz (4 CPUs)

Memory: 3070MB RAM

Page File: 2642MB used, 2313MB available

DirectX Version: DirectX 9.0c (4.09.0000.0904)

Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 3 (2600.xpsp_sp3_gdr.111025-1629)



My wife's computer, which has no issues, is only one step up from mine, but it is attached to a 19inch LCD. Here's her dxdiag results

Card name: ATI Radeon HD 4800 Series

Display Memory: 1024.0 MB

Current Mode: 1280 x 1024 (32 bit) (75Hz)

Processor: AMD Phenom(tm) II X3 720 Processor, MMX, 3DNow (3 CPUs), ~2.8GHz

Memory: 3326MB RAM

Page File: 2353MB used, 2856MB available

DirectX Version: DirectX 9.0c (4.09.0000.0904)

Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 3 (2600.xpsp_sp3_gdr.111025-1629)



Your assistance is greatly appreciated, I'd really like to not have to build a computer this month to play with friends...but I'll do what it takes...

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