Neoseeker posted a review of the XFX Geforce 6600 DDR2.

XFX have done an awesome job with the 6600 DDR2. For $100 this card performs almost as well as what cost $200 this same time last year. Take note that almost all 6600 GT's come with only 128 MB of RAM as well, versus the DDR2 which comes with 256 MB. The fact that XFX overclocks the card by 50 MHz and charges $20 less than Nvidia's MSRP and still packs in Far Cry is almost unbelievable.

As competition for ATI's X1300, this does extremely well. The card beats it in most benchmarks and overclocks well out of reach of the top model 1300. Nvidia have a very solid product with the 6600 DDR2, and XFX just makes the deal a little sweeter.

XFX 6600 DDR2 Review