GeForce GT 640 DDR3 vs Radeon RX 5600 XT

Intro

Compare those specifications to the Radeon RX 5600 XT, which features a GPU core clock speed of 1375 MHz, and 6144 MB of GDDR6 memory running at 1500 MHz through a 192-bit bus. It also features 2304 Stream Processors, 144 Texture Address Units, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
Radeon RX 5600 XT		160 Watts
	Difference: 95 Watts (146%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 5600 XT is 503% faster than the GeForce GT 640 DDR3 overall, due to its greater bandwidth. (explain)

Radeon RX 5600 XT		344064 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 287040 (503%)

Texel Rate

The Radeon RX 5600 XT should be a lot (approximately 588%) more effective at anisotropic filtering than the GeForce GT 640 DDR3. (explain)

Radeon RX 5600 XT		198000 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 169200 (588%)

Pixel Rate

The Radeon RX 5600 XT will be a lot (approximately 511%) better at anti-aliasing than the GeForce GT 640 DDR3, and also able to handle higher resolutions better. (explain)

Radeon RX 5600 XT		88000 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 73600 (511%)

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 max amount of data (counted in megabytes per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the video 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 most pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. 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 is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.