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GeForce GT 640 DDR3 vs Radeon R7 260X

Intro

The GeForce GT 640 DDR3 features a core clock frequency of 900 MHz and a DDR3 memory frequency of 1782 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It is made up of 384 SPUs, 32 Texture Address Units, and 16 ROPs.

Compare that to the Radeon R7 260X, which features GPU clock speed of 1100 MHz, and 2048 MB of GDDR5 RAM set to run at 1625 MHz through a 128-bit bus. It also is made up of 896 SPUs, 56 Texture Address Units, and 16 ROPs.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon R7 260X 4381 points
GeForce GT 640 DDR3 1560 points
Difference: 2821 (181%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3 65 Watts
Radeon R7 260X 115 Watts
Difference: 50 Watts (77%)

Memory Bandwidth

Theoretically, the Radeon R7 260X should perform much faster than the GeForce GT 640 DDR3 in general. (explain)

Radeon R7 260X 104000 MB/sec
GeForce GT 640 DDR3 57024 MB/sec
Difference: 46976 (82%)

Texel Rate

The Radeon R7 260X should be much (about 114%) better at texture filtering than the GeForce GT 640 DDR3. (explain)

Radeon R7 260X 61600 Mtexels/sec
GeForce GT 640 DDR3 28800 Mtexels/sec
Difference: 32800 (114%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R7 260X is superior to the GeForce GT 640 DDR3, by a large margin. (explain)

Radeon R7 260X 17600 Mpixels/sec
GeForce GT 640 DDR3 14400 Mpixels/sec
Difference: 3200 (22%)

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

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Radeon R7 260X

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 GT 640 DDR3 Radeon R7 260X
Manufacturer nVidia AMD
Year June 2012 October 2013
Code Name GK107 Bonaire XTX
Memory 2048 MB 2048 MB
Core Speed 900 MHz 1100 MHz
Memory Speed 3564 MHz 6500 MHz
Power (Max TDP) 65 watts 115 watts
Bandwidth 57024 MB/sec 104000 MB/sec
Texel Rate 28800 Mtexels/sec 61600 Mtexels/sec
Pixel Rate 14400 Mpixels/sec 17600 Mpixels/sec
Unified Shaders 384 896
Texture Mapping Units 32 56
Render Output Units 16 16
Bus Type DDR3 GDDR5
Bus Width 128-bit 128-bit
Fab Process 28 nm 28 nm
Transistors 1300 million 2080 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.2
OpenGL Version OpenGL 4.2 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated 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 filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce GT 640 DDR3

Amazon.com

Check prices at:

Radeon R7 260X

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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