GeForce GTX 275 vs GeForce GTX 650

Intro

Compare all that to the GeForce GTX 650, which features core clock speeds of 1058 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 memory. It features 384 SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce GTX 275		219 Watts
	Difference: 155 Watts (242%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 275 should theoretically be much better than the GeForce GTX 650 overall. (explain)

GeForce GTX 275		127008 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 47008 (59%)

Texel Rate

The GeForce GTX 275 is a lot (approximately 50%) faster with regards to texture filtering than the GeForce GTX 650. (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 16784 (50%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 275 is a better choice, but only just. (explain)

GeForce GTX 275		17724 Mpixels/sec
GeForce GTX 650		16928 Mpixels/sec
	Difference: 796 (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 (measured in MB per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR 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 calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the clock 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 fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.