GeForce 8600 GT 512MB DDR2 vs GeForce GTX 750

Intro

Compare those specs to the GeForce GTX 750, which features a core clock speed of 1020 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 128-bit memory bus, and uses a 28 nm design. It is comprised of 512 SPUs, 32 Texture Address Units, 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
GeForce GTX 750		55 Watts
	Difference: 8 Watts (17%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 750 will be 525% quicker than the GeForce 8600 GT 512MB DDR2 in general, because of its higher bandwidth. (explain)

GeForce GTX 750		80000 MB/sec
GeForce 8600 GT 512MB DDR2		12800 MB/sec
	Difference: 67200 (525%)

Texel Rate

The GeForce GTX 750 will be much (more or less 278%) more effective at anisotropic filtering than the GeForce 8600 GT 512MB DDR2. (explain)

GeForce GTX 750		32640 Mtexels/sec
GeForce 8600 GT 512MB DDR2		8640 Mtexels/sec
	Difference: 24000 (278%)

Pixel Rate

The GeForce GTX 750 is quite a bit (approximately 278%) faster with regards to AA than the GeForce 8600 GT 512MB DDR2, and able to handle higher resolutions better. (explain)

GeForce GTX 750		16320 Mpixels/sec
GeForce 8600 GT 512MB DDR2		4320 Mpixels/sec
	Difference: 12000 (278%)

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 moved over the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it should 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 high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the 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 most pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.