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GeForce GTX 275 vs GeForce GTX 650

Intro

The GeForce GTX 275 features a GPU core clock speed of 633 MHz, and the 896 MB of GDDR3 memory is set to run at 1134 MHz through a 448-bit bus. It also is made up of 240 Stream Processors, 80 Texture Address Units, and 28 ROPs.

Compare those specifications to the GeForce GTX 650, which makes use of a 28 nm design. nVidia has set the core speed at 1058 MHz. The GDDR5 memory works at a frequency of 1250 MHz on this card. It features 384 SPUs along with 32 TAUs and 16 Rasterization Operator Units.

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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

The GeForce GTX 275, in theory, should be a lot faster than the GeForce GTX 650 in general. (explain)

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

Texel Rate

The GeForce GTX 275 is much (approximately 50%) more effective at AF 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 a high screen resolution is important to you, then the GeForce GTX 275 is superior to the GeForce GTX 650, but it probably won't make a huge difference. (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

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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: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the 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 amount of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the 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 maximum number of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach 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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