GeForce 8600 GT 512MB GDDR3 vs Radeon HD 6750

Intro

Compare that to the Radeon HD 6750, which has clock speeds of 725 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR5 memory. It features 720 SPUs as well as 36 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 512MB GDDR3		47 Watts
Radeon HD 6750		86 Watts
	Difference: 39 Watts (83%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6750 should be much faster than the GeForce 8600 GT 512MB GDDR3 in general. (explain)

Radeon HD 6750		64000 MB/sec
GeForce 8600 GT 512MB GDDR3		22400 MB/sec
	Difference: 41600 (186%)

Texel Rate

The Radeon HD 6750 will be much (about 202%) faster with regards to AF than the GeForce 8600 GT 512MB GDDR3. (explain)

Radeon HD 6750		26100 Mtexels/sec
GeForce 8600 GT 512MB GDDR3		8640 Mtexels/sec
	Difference: 17460 (202%)

Pixel Rate

The Radeon HD 6750 is quite a bit (more or less 169%) better at anti-aliasing than the GeForce 8600 GT 512MB GDDR3, and also should be capable of handling higher screen resolutions better. (explain)

Radeon HD 6750		11600 Mpixels/sec
GeForce 8600 GT 512MB GDDR3		4320 Mpixels/sec
	Difference: 7280 (169%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of MB per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.