GeForce GTX 285 2GB vs Radeon HD 7750

Intro

Compare that to the Radeon HD 7750, which has a GPU core clock speed of 800 MHz, and 1024 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also features 512 SPUs, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 149 Watts (271%)

Memory Bandwidth

In theory, the GeForce GTX 285 2GB should be 121% quicker than the Radeon HD 7750 overall, due to its higher data rate. (explain)

GeForce GTX 285 2GB		158976 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 86976 (121%)

Texel Rate

The GeForce GTX 285 2GB should be a lot (about 103%) better at texture filtering than the Radeon HD 7750. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 26240 (103%)

Pixel Rate

The GeForce GTX 285 2GB will be quite a bit (more or less 62%) more effective at full screen anti-aliasing than the Radeon HD 7750, and also should be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 285 2GB		20736 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 7936 (62%)

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 over the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. 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, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This figure 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 write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs 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 fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.