GeForce 8600 GT 512MB DDR2 vs Radeon HD 6750 1GB

Intro

Compare that to the Radeon HD 6750 1GB, which makes use of a 40 nm design. AMD has set the core frequency at 725 MHz. The GDDR5 RAM runs at a frequency of 1000 MHz on this particular model. It features 720 SPUs along with 36 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 512MB DDR2		47 Watts
Radeon HD 6750 1GB		86 Watts
	Difference: 39 Watts (83%)

Memory Bandwidth

In theory, the Radeon HD 6750 1GB should perform a lot faster than the GeForce 8600 GT 512MB DDR2 overall. (explain)

Radeon HD 6750 1GB		64000 MB/sec
GeForce 8600 GT 512MB DDR2		12800 MB/sec
	Difference: 51200 (400%)

Texel Rate

The Radeon HD 6750 1GB will be much (about 202%) faster with regards to anisotropic filtering than the GeForce 8600 GT 512MB DDR2. (explain)

Radeon HD 6750 1GB		26100 Mtexels/sec
GeForce 8600 GT 512MB DDR2		8640 Mtexels/sec
	Difference: 17460 (202%)

Pixel Rate

The Radeon HD 6750 1GB should be a lot (approximately 169%) more effective at full screen anti-aliasing than the GeForce 8600 GT 512MB DDR2, and able to handle higher screen resolutions better. (explain)

Radeon HD 6750 1GB		11600 Mpixels/sec
GeForce 8600 GT 512MB DDR2		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: Bandwidth is the largest amount of information (counted in megabytes per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in a 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 outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.