GeForce GT 1030 vs GeForce GT 640 DDR3

Intro

Compare those specs to the GeForce GT 640 DDR3, which features a GPU core clock speed of 900 MHz, and 2048 MB of DDR3 RAM set to run at 1782 MHz through a 128-bit bus. It also is made up of 384 SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

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 should be just a bit faster than the GeForce GT 1030 in general. (explain)

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

Texel Rate

The GeForce GT 1030 will be a lot (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 is a lot (approximately 41%) better at AA than the GeForce GT 640 DDR3, and able to handle higher resolutions without slowing down too much. (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: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.