GeForce GT 640 DDR3 vs GeForce RTX 2060 Super

Intro

Compare all that to the GeForce RTX 2060 Super, which features a clock speed of 1470 MHz and a GDDR6 memory speed of 1750 MHz. It also makes use of a 256-bit bus, and uses a 12 nm design. It is made up of 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, the GeForce RTX 2060 Super should perform a lot faster than the GeForce GT 640 DDR3 in general. (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 should be quite a bit (about 594%) more effective at anisotropic filtering 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 a high screen resolution is important to you, then the GeForce RTX 2060 Super is a better choice, and very much so. (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 maximum amount of data (in units of MB per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.