GeForce GT 1030 vs GeForce GT 640 DDR3

Intro

Compare those specs to the GeForce GT 640 DDR3, which comes with core clock speeds of 900 MHz on the GPU, and 1782 MHz on the 2048 MB of DDR3 RAM. It features 384 SPUs as well as 32 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

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 is 16% quicker than the GeForce GT 1030 overall, due to its higher bandwidth. (explain)

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

Texel Rate

The GeForce GT 1030 is much (more or less 41%) faster with regards to 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

If using lots of anti-aliasing is important to you, then the GeForce GT 1030 is superior to the GeForce GT 640 DDR3, by a large margin. (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

Specifications

Memory Bandwidth: Bandwidth is the max amount of information (in units of MB per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the bus width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the card's clock speed. 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, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.