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GeForce GT 1030 vs GeForce GT 640 DDR3

Intro

The GeForce GT 1030 comes with a core clock speed of 1265 MHz and a GDDR5 memory frequency of 1502 MHz. It also features a 64-bit memory bus, and uses a 16 nm design. It features 384 SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Compare that to the GeForce GT 640 DDR3, which makes use of a 28 nm design. nVidia has clocked the core speed at 900 MHz. The DDR3 memory runs at a speed of 1782 MHz on this specific card. It features 384 SPUs as well as 32 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 1030 30 Watts
GeForce GT 640 DDR3 65 Watts
Difference: 35 Watts (117%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 640 DDR3 should be 16% faster than the GeForce GT 1030 overall, because of its higher data rate. (explain)

GeForce GT 640 DDR3 57024 MB/sec
GeForce GT 1030 49152 MB/sec
Difference: 7872 (16%)

Texel Rate

The GeForce GT 1030 is quite a bit (more or less 41%) better at anisotropic filtering than the GeForce GT 640 DDR3. (explain)

GeForce GT 1030 40480 Mtexels/sec
GeForce GT 640 DDR3 28800 Mtexels/sec
Difference: 11680 (41%)

Pixel Rate

The GeForce GT 1030 will be quite a bit (more or less 41%) more effective at AA than the GeForce GT 640 DDR3, and will be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GT 1030 20240 Mpixels/sec
GeForce GT 640 DDR3 14400 Mpixels/sec
Difference: 5840 (41%)

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 1030

Amazon.com

GeForce GT 640 DDR3

Amazon.com

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 1030 GeForce GT 640 DDR3
Manufacturer nVidia nVidia
Year May 2017 June 2012
Code Name GP108-300 GK107
Memory 2048 MB 2048 MB
Core Speed 1265 MHz 900 MHz
Memory Speed 6008 MHz 3564 MHz
Power (Max TDP) 30 watts 65 watts
Bandwidth 49152 MB/sec 57024 MB/sec
Texel Rate 40480 Mtexels/sec 28800 Mtexels/sec
Pixel Rate 20240 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 384 384
Texture Mapping Units 32 32
Render Output Units 16 16
Bus Type GDDR5 DDR3
Bus Width 64-bit 128-bit
Fab Process 16 nm 28 nm
Transistors 3300 million 1300 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12.0 DirectX 11.0
OpenGL Version OpenGL 4.5 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce GT 1030

Amazon.com

GeForce GT 640 DDR3

Amazon.com

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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