GeForce GT 640 DDR3 vs GeForce RTX 2060

Intro

Compare those specs to the GeForce RTX 2060, which comes with GPU core speed of 1365 MHz, and 6144 MB of GDDR6 memory running at 1750 MHz through a 192-bit bus. It also is comprised of 1920 SPUs, 120 TAUs, and 48 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
GeForce RTX 2060		160 Watts
	Difference: 95 Watts (146%)

Memory Bandwidth

The GeForce RTX 2060 should theoretically perform a lot faster than the GeForce GT 640 DDR3 in general. (explain)

GeForce RTX 2060		344064 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 287040 (503%)

Texel Rate

The GeForce RTX 2060 should be a lot (approximately 469%) more effective at anisotropic filtering than the GeForce GT 640 DDR3. (explain)

GeForce RTX 2060		163800 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 135000 (469%)

Pixel Rate

The GeForce RTX 2060 should be a lot (about 355%) more effective at FSAA than the GeForce GT 640 DDR3, and capable of handling higher resolutions while still performing well. (explain)

GeForce RTX 2060		65520 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 51120 (355%)

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 megabytes per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it must 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 AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour 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 rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.