Coming straight after the Asus Extreme N6600GT, we have to admit that the Leadtek Winfast PX6600TD seems a little dull. It uses the GeForce 6600 GPU, rather than the 6600GT, so the core speed is a mere 300MHz and the memory runs at an effective 550MHz, which makes it more akin to the GeForce 6200 than the 6600GT.

Although the 6600 has the same eight pixel pipelines as the 6600GT, the standard clock speeds are so slow that the Leadtek has a very steep hill to climb. When we ran the Leadtek WinFox utility to overclock the PX6600TD the core speed went up to 400MHz and the memory speed rose to 720MHz which closed the gap on the 6600GT, but you'll typically find that 6600 cards run regular DDR memory where 6600GTs use DDR3, so if you're hoping to turn your (£100) 6600 into a (£150) 6600GT you can forget about it as the speed of the memory will always be a limitation.

This means that your £95 buys you a graphics card that supports all of the lovely visual quality features of DirectX 9.0c and Shader Model 3, but you don't get enough raw graphics power to make the most of the features and Anti Aliasing in particular isn't really an option when you run a GeForce 6600 as the frame rate drops far too low for comfort.

This makes a mockery of the 146 million transistors humming away inside the Leadtek graphics core as they don't get the chance to show what they can do.

To our mind the performance of the Leadtek Winfast PX6600TD shows that you should jump directly from a 128MB GeForce 6200 straight to a 6600GT or better, bypassing the 6600 in one stride. A price point just below £100 is very tempting but this graphics card simply doesn't offer proper value for money.