Would the Radeon HD 7750 be a worthwhile upgrade?

Would this: Radeon HD 7750 1GB GDDR5
be a worthwhile video upgrade for my ancient PC or a waste of money?

Mainboard : Gigabyte GA-M61VME-S2, Rev.2.0
Chipset : nVidia GeForce 6100V
Processor : AMD Athlon 64 X2 5400+ @ 2800 MHz
Physical Memory : 4096 MB (2 x 2048 DDR2-SDRAM )
Video Card : NVIDIA GeForce 8600 GT
Hard Disk : Seagate ST380815AS (80GB)
DVD-Rom Drive : Toshiba-Samsung CDDVDW SH-S203N
Monitor Type : Asus ASUS VH198 - 19 inches
Network Card :NVIDIA nForce Networking Controller #3
Operating System : Microsoft Windows XP Professional 5.01.2600 Service Pack 3 (32-bit)
DirectX : Version 9.0c (May 2010)
Thank you all

It is not a worthy upgrade since the X2 will bottleneck it greatly.

You can get a 7770 for less than the 7750 you linked to.

I say go for it, your CPU will a bottleneck in certain games but you will see a vast improvement in gaming performance over your 8600GT. Also when you decide to upgrade your CPU/mobo/RAM you can still keep the same GPU.

Will his PSU be sufficient enough?

I'd re-evaluate the choice after the HD 7790 drops tomorrow (about 12 hours from now). If the card gets a favourable reception, then you will likely see a small price reduction on the HD 7770 and 7750.

The 8600GT pulls about 40-43w under load. The HD 7750 a little more- but barely, at ~50w.

Yeah I +1 the 7790 idea.

You could buy that card, its good price/performance deal. You can use it in your future pc and it doesn t require a lot of power so that s nice. Its better than the 8600 GT.