GeForce 8800 GTS (G92) vs Radeon HD 4750

Intro

Compare those specifications 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 memory. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750		75 Watts
GeForce 8800 GTS (G92)		135 Watts
	Difference: 60 Watts (80%)

Memory Bandwidth

Theoretically speaking, the GeForce 8800 GTS (G92) is 21% quicker than the Radeon HD 4750 overall, because of its higher bandwidth. (explain)

GeForce 8800 GTS (G92)		62080 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 10880 (21%)

Texel Rate

The GeForce 8800 GTS (G92) should be a lot (about 78%) faster with regards to anisotropic filtering than the Radeon HD 4750. (explain)

GeForce 8800 GTS (G92)		41600 Mtexels/sec
Radeon HD 4750		23360 Mtexels/sec
	Difference: 18240 (78%)

Pixel Rate

The Radeon HD 4750 should be just a bit (approximately 12%) faster with regards to anti-aliasing than the GeForce 8800 GTS (G92), and also should be able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 4750		11680 Mpixels/sec
GeForce 8800 GTS (G92)		10400 Mpixels/sec
	Difference: 1280 (12%)

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 information (in units of megabytes per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the bus width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, 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 number of pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.