GeForce 8500 GT vs Radeon HD 7750

Intro

Compare those specs to the Radeon HD 7750, which comes with GPU core speed of 800 MHz, and 1024 MB of GDDR5 memory set to run at 1125 MHz through a 128-bit bus. It also is made up of 512 Stream Processors, 32 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8500 GT		45 Watts
Radeon HD 7750		55 Watts
	Difference: 10 Watts (22%)

Memory Bandwidth

In theory, the Radeon HD 7750 should be quite a bit faster than the GeForce 8500 GT overall. (explain)

Radeon HD 7750		72000 MB/sec
GeForce 8500 GT		12800 MB/sec
	Difference: 59200 (463%)

Texel Rate

The Radeon HD 7750 should be a lot (approximately 611%) better at AF than the GeForce 8500 GT. (explain)

Radeon HD 7750		25600 Mtexels/sec
GeForce 8500 GT		3600 Mtexels/sec
	Difference: 22000 (611%)

Pixel Rate

The Radeon HD 7750 will be quite a bit (about 611%) faster with regards to anti-aliasing than the GeForce 8500 GT, and also able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 7750		12800 Mpixels/sec
GeForce 8500 GT		1800 Mpixels/sec
	Difference: 11000 (611%)

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 maximum amount of data (measured in megabytes per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's 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 are processed per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few 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.