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GeForce GTX 275 vs Radeon R9 M395X

Intro

The GeForce GTX 275 has a GPU clock speed of 633 MHz, and the 896 MB of GDDR3 memory runs at 1134 MHz through a 448-bit bus. It also is made up of 240 SPUs, 80 Texture Address Units, and 28 ROPs.

Compare those specifications to the Radeon R9 M395X, which comes with a core clock speed of 723 MHz and a GDDR5 memory speed of 1250 MHz. It also features a 256-bit memory bus, and makes use of a 28 nm design. It is made up of 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X 125 Watts
GeForce GTX 275 219 Watts
Difference: 94 Watts (75%)

Memory Bandwidth

The Radeon R9 M395X, in theory, should perform much faster than the GeForce GTX 275 in general. (explain)

Radeon R9 M395X 160000 MB/sec
GeForce GTX 275 127008 MB/sec
Difference: 32992 (26%)

Texel Rate

The Radeon R9 M395X is a lot (about 83%) more effective at anisotropic filtering than the GeForce GTX 275. (explain)

Radeon R9 M395X 92544 Mtexels/sec
GeForce GTX 275 50640 Mtexels/sec
Difference: 41904 (83%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 M395X is the winner, by far. (explain)

Radeon R9 M395X 23136 Mpixels/sec
GeForce GTX 275 17724 Mpixels/sec
Difference: 5412 (31%)

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:

Radeon R9 M395X

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 Radeon R9 M395X
Manufacturer nVidia AMD
Year April 9, 2009 2015
Code Name G200b Tonga
Memory 896 MB 4096 MB
Core Speed 633 MHz 723 MHz
Memory Speed 2268 MHz 5000 MHz
Power (Max TDP) 219 watts 125 watts
Bandwidth 127008 MB/sec 160000 MB/sec
Texel Rate 50640 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 17724 Mpixels/sec 23136 Mpixels/sec
Unified Shaders 240 2048
Texture Mapping Units 80 128
Render Output Units 28 32
Bus Type GDDR3 GDDR5
Bus Width 448-bit 256-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 4.3

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the card's clock speed. 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 bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 275

Amazon.com

Check prices at:

Radeon R9 M395X

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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