GeForce 8600 GT 256MB DDR2 vs Radeon HD 6750

Intro

Compare all of that to the Radeon HD 6750, which comes with a core clock speed of 725 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 128-bit bus, and makes use of a 40 nm design. It features 720 SPUs, 36 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 256MB DDR2		47 Watts
Radeon HD 6750		86 Watts
	Difference: 39 Watts (83%)

Memory Bandwidth

The Radeon HD 6750 should theoretically be much faster than the GeForce 8600 GT 256MB DDR2 overall. (explain)

Radeon HD 6750		64000 MB/sec
GeForce 8600 GT 256MB DDR2		12800 MB/sec
	Difference: 51200 (400%)

Texel Rate

The Radeon HD 6750 should be a lot (more or less 202%) more effective at anisotropic filtering than the GeForce 8600 GT 256MB DDR2. (explain)

Radeon HD 6750		26100 Mtexels/sec
GeForce 8600 GT 256MB DDR2		8640 Mtexels/sec
	Difference: 17460 (202%)

Pixel Rate

The Radeon HD 6750 should be much (approximately 169%) more effective at FSAA than the GeForce 8600 GT 256MB DDR2, and capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 6750		11600 Mpixels/sec
GeForce 8600 GT 256MB 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: Memory bandwidth is the max amount of data (measured in MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel 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 reach the maximum fill rate.