GeForce GTX 470 vs Radeon HD 4750

Intro

Compare all that to the Radeon HD 4750, which comes with core speeds of 730 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 memory. It features 640(128x5) SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750		75 Watts
GeForce GTX 470		215 Watts
	Difference: 140 Watts (187%)

Memory Bandwidth

In theory, the GeForce GTX 470 will be 162% quicker than the Radeon HD 4750 in general, because of its greater data rate. (explain)

GeForce GTX 470		133920 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 82720 (162%)

Texel Rate

The GeForce GTX 470 should be a lot (more or less 46%) more effective at texture filtering than the Radeon HD 4750. (explain)

GeForce GTX 470		33992 Mtexels/sec
Radeon HD 4750		23360 Mtexels/sec
	Difference: 10632 (46%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 470 is the winner, and very much so. (explain)

GeForce GTX 470		24280 Mpixels/sec
Radeon HD 4750		11680 Mpixels/sec
	Difference: 12600 (108%)

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 data (counted in megabytes per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount 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 worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.