GeForce 8800 GTS (G80) 320MB vs Radeon HD 7750

Intro

Compare all that to the Radeon HD 7750, which has a core clock speed of 800 MHz and a GDDR5 memory frequency of 1125 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It is comprised of 512 SPUs, 32 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
GeForce 8800 GTS (G80) 320MB		143 Watts
	Difference: 88 Watts (160%)

Memory Bandwidth

The Radeon HD 7750 should theoretically be just a bit faster than the GeForce 8800 GTS (G80) 320MB in general. (explain)

Radeon HD 7750		72000 MB/sec
GeForce 8800 GTS (G80) 320MB		63360 MB/sec
	Difference: 8640 (14%)

Texel Rate

The Radeon HD 7750 is a little bit (approximately 4%) more effective at texture filtering than the GeForce 8800 GTS (G80) 320MB. (explain)

Radeon HD 7750		25600 Mtexels/sec
GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
	Difference: 976 (4%)

Pixel Rate

The Radeon HD 7750 will be a lot (approximately 25%) better at anti-aliasing than the GeForce 8800 GTS (G80) 320MB, and able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 7750		12800 Mpixels/sec
GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
	Difference: 2540 (25%)

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 (in units of megabytes per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total amount of texture units 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can 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 ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.