GeForce 8600 GT 1GB GDDR3 vs GeForce GTX 650 Ti

Intro

Compare all of that to the GeForce GTX 650 Ti, which has GPU clock speed of 928 MHz, and 1024 MB of GDDR5 RAM set to run at 1350 MHz through a 128-bit bus. It also is comprised of 768 Stream Processors, 64 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 1GB GDDR3		47 Watts
GeForce GTX 650 Ti		110 Watts
	Difference: 63 Watts (134%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 650 Ti is 286% quicker than the GeForce 8600 GT 1GB GDDR3 overall, due to its greater bandwidth. (explain)

GeForce GTX 650 Ti		86400 MB/sec
GeForce 8600 GT 1GB GDDR3		22400 MB/sec
	Difference: 64000 (286%)

Texel Rate

The GeForce GTX 650 Ti is quite a bit (about 587%) more effective at AF than the GeForce 8600 GT 1GB GDDR3. (explain)

GeForce GTX 650 Ti		59392 Mtexels/sec
GeForce 8600 GT 1GB GDDR3		8640 Mtexels/sec
	Difference: 50752 (587%)

Pixel Rate

The GeForce GTX 650 Ti will be a lot (approximately 244%) more effective at full screen anti-aliasing than the GeForce 8600 GT 1GB GDDR3, and will be capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTX 650 Ti		14848 Mpixels/sec
GeForce 8600 GT 1GB GDDR3		4320 Mpixels/sec
	Difference: 10528 (244%)

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 max 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 bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's 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 number of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.