GeForce GTX 470 vs Radeon HD 4750

Intro

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

Display Graphs

Hide Graphs

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

Theoretically speaking, the GeForce GTX 470 should be quite a bit faster than the Radeon HD 4750 in general. (explain)

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

Texel Rate

The GeForce GTX 470 should be much (approximately 46%) better at anisotropic 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 running with 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: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the 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 number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the graphics 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 most pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.