GeForce GTX 295 vs GeForce GTX 650

Intro

Compare those specifications to the GeForce GTX 650, which comes with a core clock speed of 1058 MHz and a GDDR5 memory speed of 1250 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It is made up of 384 SPUs, 32 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce GTX 295		289 Watts
	Difference: 225 Watts (352%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 295 will be 180% faster than the GeForce GTX 650 in general, because of its higher data rate. (explain)

GeForce GTX 295		223776 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 143776 (180%)

Texel Rate

The GeForce GTX 295 will be quite a bit (approximately 172%) more effective at anisotropic filtering than the GeForce GTX 650. (explain)

GeForce GTX 295		92160 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 58304 (172%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 295 is the winner, by a large margin. (explain)

GeForce GTX 295		32256 Mpixels/sec
GeForce GTX 650		16928 Mpixels/sec
	Difference: 15328 (91%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.