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GeForce GT 640 DDR3 vs Radeon R9 380 2G

Intro

The GeForce GT 640 DDR3 comes with a core clock speed of 900 MHz and a DDR3 memory speed of 1782 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It features 384 SPUs, 32 TAUs, and 16 Raster Operation Units.

Compare those specs to the Radeon R9 380 2G, which comes with clock speeds of 970 MHz on the GPU, and 1425 MHz on the 2048 MB of GDDR5 memory. It features 1792 SPUs as well as 112 Texture Address Units and 32 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 R9 380 2G 8850 points
GeForce GT 640 DDR3 1560 points
Difference: 7290 (467%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3 65 Watts
Radeon R9 380 2G 190 Watts
Difference: 125 Watts (192%)

Memory Bandwidth

As far as performance goes, the Radeon R9 380 2G should theoretically be much superior to the GeForce GT 640 DDR3 overall. (explain)

Radeon R9 380 2G 182400 MB/sec
GeForce GT 640 DDR3 57024 MB/sec
Difference: 125376 (220%)

Texel Rate

The Radeon R9 380 2G will be a lot (more or less 277%) faster with regards to anisotropic filtering than the GeForce GT 640 DDR3. (explain)

Radeon R9 380 2G 108640 Mtexels/sec
GeForce GT 640 DDR3 28800 Mtexels/sec
Difference: 79840 (277%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 380 2G is the winner, by far. (explain)

Radeon R9 380 2G 31040 Mpixels/sec
GeForce GT 640 DDR3 14400 Mpixels/sec
Difference: 16640 (116%)

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 R9 380 2G

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 R9 380 2G
Manufacturer nVidia AMD
Year June 2012 June 2015
Code Name GK107 Antigua PRO
Memory 2048 MB 2048 MB
Core Speed 900 MHz 970 MHz
Memory Speed 3564 MHz 5700 MHz
Power (Max TDP) 65 watts 190 watts
Bandwidth 57024 MB/sec 182400 MB/sec
Texel Rate 28800 Mtexels/sec 108640 Mtexels/sec
Pixel Rate 14400 Mpixels/sec 31040 Mpixels/sec
Unified Shaders 384 1792
Texture Mapping Units 32 112
Render Output Units 16 32
Bus Type DDR3 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 1300 million 5000 million
Bus PCIe 3.0 x16 PCIe 3.0 ×16
DirectX Version DirectX 11.0 DirectX 12.0
OpenGL Version OpenGL 4.2 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the max amount of information (measured in MB per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. 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 higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out 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 filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce GT 640 DDR3

Amazon.com

Check prices at:

Radeon R9 380 2G

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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