GeForce GT 640 DDR3 vs GeForce RTX 2060 Super

Intro

Compare all of that to the GeForce RTX 2060 Super, which comes with a core clock speed of 1470 MHz and a GDDR6 memory speed of 1750 MHz. It also makes use of a 256-bit memory bus, and makes use of a 12 nm design. It features 2176 SPUs, 136 TAUs, and 64 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
GeForce RTX 2060 Super		175 Watts
	Difference: 110 Watts (169%)

Memory Bandwidth

Theoretically speaking, the GeForce RTX 2060 Super will be 704% faster than the GeForce GT 640 DDR3 overall, due to its greater data rate. (explain)

GeForce RTX 2060 Super		458752 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 401728 (704%)

Texel Rate

The GeForce RTX 2060 Super is a lot (about 594%) faster with regards to AF than the GeForce GT 640 DDR3. (explain)

GeForce RTX 2060 Super		199920 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 171120 (594%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce RTX 2060 Super is a better choice, by a large margin. (explain)

GeForce RTX 2060 Super		94080 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 79680 (553%)

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 data (counted in megabytes per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 in one second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of 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 amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.