GeForce GTX 480 vs Radeon HD 4750

Intro

Compare all that to the Radeon HD 4750, which comes with clock speeds of 730 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 RAM. It features 640(128x5) SPUs as well as 32 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750		75 Watts
GeForce GTX 480		250 Watts
	Difference: 175 Watts (233%)

Memory Bandwidth

The GeForce GTX 480 should in theory perform a lot faster than the Radeon HD 4750 in general. (explain)

GeForce GTX 480		177408 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 126208 (247%)

Texel Rate

The GeForce GTX 480 will be a lot (approximately 80%) better at AF than the Radeon HD 4750. (explain)

GeForce GTX 480		42000 Mtexels/sec
Radeon HD 4750		23360 Mtexels/sec
	Difference: 18640 (80%)

Pixel Rate

The GeForce GTX 480 is much (approximately 188%) faster with regards to AA than the Radeon HD 4750, and will be able to handle higher screen resolutions better. (explain)

GeForce GTX 480		33600 Mpixels/sec
Radeon HD 4750		11680 Mpixels/sec
	Difference: 21920 (188%)

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 max amount of information (counted in megabytes per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to 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 ability to reach the maximum fill rate.