GeForce 8800 GTX vs Radeon HD 7750

Intro

Compare those specs to the Radeon HD 7750, which uses a 28 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 memory runs at a speed of 1125 MHz on this model. It features 512 SPUs along with 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
GeForce 8800 GTX		155 Watts
	Difference: 100 Watts (182%)

Memory Bandwidth

In theory, the GeForce 8800 GTX should be 20% faster than the Radeon HD 7750 overall, due to its greater data rate. (explain)

GeForce 8800 GTX		86400 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 14400 (20%)

Texel Rate

The GeForce 8800 GTX should be quite a bit (approximately 44%) better at texture filtering than the Radeon HD 7750. (explain)

GeForce 8800 GTX		36800 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 11200 (44%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce 8800 GTX is superior to the Radeon HD 7750, but only just. (explain)

GeForce 8800 GTX		13800 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 1000 (8%)

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 maximum amount of information (measured in MB per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, it must 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total 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 applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.