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GeForce GT 640 DDR3 vs Radeon R7 240

Intro

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

Compare all of that to the Radeon R7 240, which has GPU clock speed of 730 MHz, and 2048 MB of DDR3 RAM running at 900 MHz through a 128-bit bus. It also is comprised of 320 SPUs, 20 TAUs, and 8 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

GeForce GT 640 DDR3 1560 points
Radeon R7 240 1218 points
Difference: 342 (28%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240 30 Watts
GeForce GT 640 DDR3 65 Watts
Difference: 35 Watts (117%)

Memory Bandwidth

As far as performance goes, the GeForce GT 640 DDR3 should theoretically be much superior to the Radeon R7 240 overall. (explain)

GeForce GT 640 DDR3 57024 MB/sec
Radeon R7 240 28800 MB/sec
Difference: 28224 (98%)

Texel Rate

The GeForce GT 640 DDR3 will be much (about 97%) better at AF than the Radeon R7 240. (explain)

GeForce GT 640 DDR3 28800 Mtexels/sec
Radeon R7 240 14600 Mtexels/sec
Difference: 14200 (97%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GT 640 DDR3 is a better choice, and very much so. (explain)

GeForce GT 640 DDR3 14400 Mpixels/sec
Radeon R7 240 5840 Mpixels/sec
Difference: 8560 (147%)

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 240

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 240
Manufacturer nVidia AMD
Year June 2012 October 2013
Code Name GK107 Oland PRO
Memory 2048 MB 2048 MB
Core Speed 900 MHz 730 MHz
Memory Speed 3564 MHz 1800 MHz
Power (Max TDP) 65 watts 30 watts
Bandwidth 57024 MB/sec 28800 MB/sec
Texel Rate 28800 Mtexels/sec 14600 Mtexels/sec
Pixel Rate 14400 Mpixels/sec 5840 Mpixels/sec
Unified Shaders 384 320
Texture Mapping Units 32 20
Render Output Units 16 8
Bus Type DDR3 DDR3
Bus Width 128-bit 128-bit
Fab Process 28 nm 28 nm
Transistors 1300 million 1040 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 largest amount of information (counted in MB per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better 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 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 higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also 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 - the lower the 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 240

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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