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GeForce GT 640 DDR3 vs Geforce GTX 760

Intro

The GeForce GT 640 DDR3 features a GPU core speed of 900 MHz, and the 2048 MB of DDR3 memory runs at 1782 MHz through a 128-bit bus. It also is comprised of 384 SPUs, 32 TAUs, and 16 Raster Operation Units.

Compare all of that to the Geforce GTX 760, which uses a 28 nm design. nVidia has set the core frequency at 980 MHz. The GDDR5 memory is set to run at a speed of 1502 MHz on this specific model. It features 1152 SPUs along with 96 TAUs and 32 Rasterization Operator Units.

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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 GTX 760 5923 points
GeForce GT 640 DDR3 1560 points
Difference: 4363 (280%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3 65 Watts
Geforce GTX 760 170 Watts
Difference: 105 Watts (162%)

Memory Bandwidth

The Geforce GTX 760 should in theory perform a lot faster than the GeForce GT 640 DDR3 in general. (explain)

Geforce GTX 760 192256 MB/sec
GeForce GT 640 DDR3 57024 MB/sec
Difference: 135232 (237%)

Texel Rate

The Geforce GTX 760 should be a lot (about 227%) better at texture filtering than the GeForce GT 640 DDR3. (explain)

Geforce GTX 760 94080 Mtexels/sec
GeForce GT 640 DDR3 28800 Mtexels/sec
Difference: 65280 (227%)

Pixel Rate

The Geforce GTX 760 should be much (more or less 118%) faster with regards to FSAA than the GeForce GT 640 DDR3, and should be able to handle higher resolutions while still performing well. (explain)

Geforce GTX 760 31360 Mpixels/sec
GeForce GT 640 DDR3 14400 Mpixels/sec
Difference: 16960 (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

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Geforce GTX 760

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 Geforce GTX 760
Manufacturer nVidia nVidia
Year June 2012 June 2013
Code Name GK107 GK104
Memory 2048 MB 2048 MB
Core Speed 900 MHz 980 MHz
Memory Speed 3564 MHz 6008 MHz
Power (Max TDP) 65 watts 170 watts
Bandwidth 57024 MB/sec 192256 MB/sec
Texel Rate 28800 Mtexels/sec 94080 Mtexels/sec
Pixel Rate 14400 Mpixels/sec 31360 Mpixels/sec
Unified Shaders 384 1152
Texture Mapping Units 32 96
Render Output Units 16 32
Bus Type DDR3 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 1300 million 3540 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.0
OpenGL Version OpenGL 4.2 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines 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 rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce GT 640 DDR3

Amazon.com

Check prices at:

Geforce GTX 760

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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