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GeForce GT 640 DDR3 vs Radeon R7 M260X

Intro

The GeForce GT 640 DDR3 has clock speeds of 900 MHz on the GPU, and 1782 MHz on the 2048 MB of DDR3 RAM. It features 384 SPUs along with 32 TAUs and 16 Rasterization Operator Units.

Compare that to the Radeon R7 M260X, which makes use of a 28 nm design. AMD has set the core frequency at 825 MHz. The GDDR5 RAM is set to run at a speed of 1000 MHz on this model. It features 384 SPUs as well as 24 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R7 M260X, in theory, should perform a small bit faster than the GeForce GT 640 DDR3 overall. (explain)

Radeon R7 M260X 64000 MB/sec
GeForce GT 640 DDR3 57024 MB/sec
Difference: 6976 (12%)

Texel Rate

The GeForce GT 640 DDR3 will be quite a bit (about 45%) more effective at texture filtering than the Radeon R7 M260X. (explain)

GeForce GT 640 DDR3 28800 Mtexels/sec
Radeon R7 M260X 19800 Mtexels/sec
Difference: 9000 (45%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GT 640 DDR3 is a better choice, by far. (explain)

GeForce GT 640 DDR3 14400 Mpixels/sec
Radeon R7 M260X 6600 Mpixels/sec
Difference: 7800 (118%)

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 GT 640 DDR3

Amazon.com

Check prices at:

Radeon R7 M260X

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 GT 640 DDR3 Radeon R7 M260X
Manufacturer nVidia AMD
Year June 2012 June 2014
Code Name GK107 Opal
Memory 2048 MB 2048 MB
Core Speed 900 MHz 825 MHz
Memory Speed 3564 MHz 4000 MHz
Power (Max TDP) 65 watts (Unknown) watts
Bandwidth 57024 MB/sec 64000 MB/sec
Texel Rate 28800 Mtexels/sec 19800 Mtexels/sec
Pixel Rate 14400 Mpixels/sec 6600 Mpixels/sec
Unified Shaders 384 384
Texture Mapping Units 32 24
Render Output Units 16 8
Bus Type DDR3 GDDR5
Bus Width 128-bit 128-bit
Fab Process 28 nm 28 nm
Transistors 1300 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x8
DirectX Version DirectX 11.0 DirectX 11.2
OpenGL Version OpenGL 4.2 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of data (counted in megabytes per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR type memory, the result should 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 anti-aliasing, High Dynamic Range and higher screen 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 speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce GT 640 DDR3

Amazon.com

Check prices at:

Radeon R7 M260X

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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