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GeForce GTX 275 vs GeForce GTX 650

Intro

The GeForce GTX 275 makes use of a 55 nm design. nVidia has clocked the core speed at 633 MHz. The GDDR3 RAM is set to run at a speed of 1134 MHz on this model. It features 240 SPUs as well as 80 TAUs and 28 ROPs.

Compare those specs to the GeForce GTX 650, which has a GPU core clock speed of 1058 MHz, and 1024 MB of GDDR5 memory running at 1250 MHz through a 128-bit bus. It also features 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 275 219 Watts
Difference: 155 Watts (242%)

Memory Bandwidth

In theory, the GeForce GTX 275 is 59% faster than the GeForce GTX 650 overall, because of its higher bandwidth. (explain)

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

Texel Rate

The GeForce GTX 275 is quite a bit (more or less 50%) better at anisotropic 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 running with lots of anti-aliasing 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

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GeForce GTX 275

Amazon.com

Check prices at:

GeForce GTX 650

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce GTX 275 GeForce GTX 650
Manufacturer nVidia nVidia
Year April 9, 2009 September 2012
Code Name G200b GK107
Memory 896 MB 1024 MB
Core Speed 633 MHz 1058 MHz
Memory Speed 2268 MHz 5000 MHz
Power (Max TDP) 219 watts 64 watts
Bandwidth 127008 MB/sec 80000 MB/sec
Texel Rate 50640 Mtexels/sec 33856 Mtexels/sec
Pixel Rate 17724 Mpixels/sec 16928 Mpixels/sec
Unified Shaders 240 384
Texture Mapping Units 80 32
Render Output Units 28 16
Bus Type GDDR3 GDDR5
Bus Width 448-bit 128-bit
Fab Process 55 nm 28 nm
Transistors 1400 million 1300 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.0
OpenGL Version OpenGL 3.1 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the max amount of data (counted in MB per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GTX 275

Amazon.com

Check prices at:

GeForce GTX 650

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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