GeForce 8600 GT 512MB DDR2 vs Radeon HD 4750

Intro

Compare all that to the Radeon HD 4750, which makes use of a 40 nm design. AMD has set the core frequency at 730 MHz. The GDDR5 RAM runs at a frequency of 800 MHz on this specific 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)

GeForce 8600 GT 512MB DDR2		47 Watts
Radeon HD 4750		75 Watts
	Difference: 28 Watts (60%)

Memory Bandwidth

The Radeon HD 4750, in theory, should be a lot faster than the GeForce 8600 GT 512MB DDR2 overall. (explain)

Radeon HD 4750		51200 MB/sec
GeForce 8600 GT 512MB DDR2		12800 MB/sec
	Difference: 38400 (300%)

Texel Rate

The Radeon HD 4750 is a lot (more or less 170%) faster with regards to texture filtering than the GeForce 8600 GT 512MB DDR2. (explain)

Radeon HD 4750		23360 Mtexels/sec
GeForce 8600 GT 512MB DDR2		8640 Mtexels/sec
	Difference: 14720 (170%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 4750 is superior to the GeForce 8600 GT 512MB DDR2, by a large margin. (explain)

Radeon HD 4750		11680 Mpixels/sec
GeForce 8600 GT 512MB DDR2		4320 Mpixels/sec
	Difference: 7360 (170%)

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 (measured in megabytes per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 are applied in one second. This figure is worked out by multiplying the total texture units of the card by the core 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 a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core 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 fill rate is also dependant 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.