GeForce GTX 480 vs Radeon HD 4750

Intro

Compare all of that to the Radeon HD 4750, which makes use of a 40 nm design. AMD has set the core speed at 730 MHz. The GDDR5 memory runs at a speed of 800 MHz on this model. It features 640(128x5) SPUs along with 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

In theory, the GeForce GTX 480 should be quite a bit 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 should be a lot (approximately 80%) faster with regards to texture filtering than the Radeon HD 4750. (explain)

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

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 480 is a better choice, by a large margin. (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: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied 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 figure is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. 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 output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.