GeForce GTX 480 vs Radeon HD 4750

Intro

Compare that to the Radeon HD 4750, which has GPU clock speed of 730 MHz, and 512 MB of GDDR5 RAM set to run at 800 MHz through a 128-bit bus. It also features 640(128x5) Stream Processors, 32 TAUs, and 16 Raster Operation Units.

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

Performance-wise, the GeForce GTX 480 should in theory be a lot superior to 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 quite a bit (approximately 80%) better at 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

The GeForce GTX 480 is quite a bit (approximately 188%) faster with regards to AA than the Radeon HD 4750, and also will be capable of handling higher screen resolutions more effectively. (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 largest amount of data (counted in MB per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher 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 can be applied per second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.