GeForce GT 640 DDR3 vs GeForce RTX 2080 SUPER

Intro

Compare all that to the GeForce RTX 2080 SUPER, which features a clock frequency of 1650 MHz and a GDDR6 memory frequency of 1937 MHz. It also features a 256-bit bus, and makes use of a 12 nm design. It is comprised of 3072 SPUs, 192 TAUs, and 64 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
GeForce RTX 2080 SUPER		250 Watts
	Difference: 185 Watts (285%)

Memory Bandwidth

The GeForce RTX 2080 SUPER, in theory, should perform a lot faster than the GeForce GT 640 DDR3 overall. (explain)

GeForce RTX 2080 SUPER		507904 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 450880 (791%)

Texel Rate

The GeForce RTX 2080 SUPER is a lot (approximately 1000%) faster with regards to texture filtering than the GeForce GT 640 DDR3. (explain)

GeForce RTX 2080 SUPER		316800 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 288000 (1000%)

Pixel Rate

The GeForce RTX 2080 SUPER should be quite a bit (approximately 633%) more effective at anti-aliasing than the GeForce GT 640 DDR3, and also should be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce RTX 2080 SUPER		105600 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 91200 (633%)

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 MB per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics 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 maximum amount of pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.