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GeForce GTX 275 vs GeForce GTX 850M

Intro

The GeForce GTX 275 features clock speeds of 633 MHz on the GPU, and 1134 MHz on the 896 MB of GDDR3 RAM. It features 240 SPUs along with 80 TAUs and 28 ROPs.

Compare those specs to the GeForce GTX 850M, which has a clock speed of 876 MHz and a DDR3 memory frequency of 1000 MHz. It also makes use of a 128-bit memory bus, and uses a 28 nm design. It is made up of 640 SPUs, 40 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M 40 Watts
GeForce GTX 275 219 Watts
Difference: 179 Watts (448%)

Memory Bandwidth

The GeForce GTX 275, in theory, should perform quite a bit faster than the GeForce GTX 850M in general. (explain)

GeForce GTX 275 127008 MB/sec
GeForce GTX 850M 32000 MB/sec
Difference: 95008 (297%)

Texel Rate

The GeForce GTX 275 will be quite a bit (more or less 45%) more effective at anisotropic filtering than the GeForce GTX 850M. (explain)

GeForce GTX 275 50640 Mtexels/sec
GeForce GTX 850M 35040 Mtexels/sec
Difference: 15600 (45%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 275 is a better choice, and very much so. (explain)

GeForce GTX 275 17724 Mpixels/sec
GeForce GTX 850M 14016 Mpixels/sec
Difference: 3708 (26%)

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 850M

Amazon.com

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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 850M
Manufacturer nVidia nVidia
Year April 9, 2009 March 12 2014
Code Name G200b GM107
Memory 896 MB 2048 MB
Core Speed 633 MHz 876 MHz
Memory Speed 2268 MHz 2000 MHz
Power (Max TDP) 219 watts 40 watts
Bandwidth 127008 MB/sec 32000 MB/sec
Texel Rate 50640 Mtexels/sec 35040 Mtexels/sec
Pixel Rate 17724 Mpixels/sec 14016 Mpixels/sec
Unified Shaders 240 640
Texture Mapping Units 80 40
Render Output Units 28 16
Bus Type GDDR3 DDR3
Bus Width 448-bit 128-bit
Fab Process 55 nm 28 nm
Transistors 1400 million (Unknown) million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 12
OpenGL Version OpenGL 3.1 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of MB per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. 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 can be applied in one second. This figure is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write 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 core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce GTX 275

Amazon.com

Check prices at:

GeForce GTX 850M

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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