GeForce 8500 GT vs Radeon HD 6750 1GB

Intro

Compare those specs to the Radeon HD 6750 1GB, which uses a 40 nm design. AMD has clocked the core frequency at 725 MHz. The GDDR5 memory runs at a speed of 1000 MHz on this particular card. 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 8500 GT		45 Watts
Radeon HD 6750 1GB		86 Watts
	Difference: 41 Watts (91%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6750 1GB should theoretically be quite a bit better than the GeForce 8500 GT in general. (explain)

Radeon HD 6750 1GB		64000 MB/sec
GeForce 8500 GT		12800 MB/sec
	Difference: 51200 (400%)

Texel Rate

The Radeon HD 6750 1GB should be much (more or less 625%) faster with regards to anisotropic filtering than the GeForce 8500 GT. (explain)

Radeon HD 6750 1GB		26100 Mtexels/sec
GeForce 8500 GT		3600 Mtexels/sec
	Difference: 22500 (625%)

Pixel Rate

The Radeon HD 6750 1GB should be much (about 544%) faster with regards to full screen anti-aliasing than the GeForce 8500 GT, and also capable of handling higher resolutions while still performing well. (explain)

Radeon HD 6750 1GB		11600 Mpixels/sec
GeForce 8500 GT		1800 Mpixels/sec
	Difference: 9800 (544%)

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 information (counted in megabytes per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.