GeForce GTX 260 Core 216 vs GeForce GTX 650

Intro

Compare all that to the GeForce GTX 650, which has GPU clock speed of 1058 MHz, and 1024 MB of GDDR5 memory set to run at 1250 MHz through a 128-bit bus. It also features 384 Stream Processors, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce GTX 260 Core 216		202 Watts
	Difference: 138 Watts (216%)

Memory Bandwidth

The GeForce GTX 260 Core 216 should theoretically perform quite a bit faster than the GeForce GTX 650 overall. (explain)

GeForce GTX 260 Core 216		111888 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 31888 (40%)

Texel Rate

The GeForce GTX 260 Core 216 will be quite a bit (about 22%) more effective at texture filtering than the GeForce GTX 650. (explain)

GeForce GTX 260 Core 216		41472 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 7616 (22%)

Pixel Rate

The GeForce GTX 650 will be just a bit (more or less 5%) better at anti-aliasing than the GeForce GTX 260 Core 216, and also will be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 650		16928 Mpixels/sec
GeForce GTX 260 Core 216		16128 Mpixels/sec
	Difference: 800 (5%)

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 information (counted in MB per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, 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 most pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.