GeForce GTX 280 vs Radeon HD 7750

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
GeForce GTX 280		236 Watts
	Difference: 181 Watts (329%)

Memory Bandwidth

Performance-wise, the GeForce GTX 280 should in theory be a lot superior to the Radeon HD 7750 overall. (explain)

GeForce GTX 280		141696 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 69696 (97%)

Texel Rate

The GeForce GTX 280 will be a lot (approximately 88%) better at anisotropic filtering than the Radeon HD 7750. (explain)

GeForce GTX 280		48160 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 22560 (88%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 280 is the winner, by far. (explain)

GeForce GTX 280		19264 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 6464 (51%)

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 largest amount of data (measured in MB per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once 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, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.