I recently upgraded my video card and CPU but did not get the performance gain I was expecting. With my current setup I cannot take all 5 toons into stormwind because the FPS on all of them (even the master) drops to 0-3. I can take three in, but no more than that. Even then its choppy. I have the graphics slider in wow set to minimum. The only change I made was upping the view distance to Good. I have the master's FPS limited to 30 and the slaves to 15 through isboxer. I run all copies of WoW from the same folder (one installation). My connection is not the issue; my latency is fine even in SW. When I switched from an older athlon dual core cpu and an 8800gt video card I was expecting more of a performance boost. The game at least runs fine now when not in stormwind but I have the graphics turned all the way down. I was hoping to do more than just be able to run the master at 30fps. I cannot remove the fps throttle in isboxer or I get highly erratic framerates (15-60) for no apparent reason. I have no viruses or rootkits. I have pretty much nothing installed except xp and wow. This computer is not bloated with a bunch of crap installed. Thanks for any help you can offer.

What should I do to increase performance without building another computer?

OS: Windows XP Pro 32-bit, DX9

CPU AMD Phenom II X4 940 Black Edition

MoBo ASUS M2N-SLI Deluxe AM2 (flashed to support my new AM3 chip)

Video Card XFX HD-577A-ZNFC Radeon HD 5770

PS CORSAIR Enthusiast Series CMPSU-650TX 650W

RAM 4GB SDRAM DDR2 800 (PC2 6400)

HDD 250GB 7200 RPM 16MB Cache SATA 3.0Gb/s