GeForce GT 640 DDR3 vs Radeon RX 5500 XT

Intro

Compare those specifications to the Radeon RX 5500 XT, which has a core clock speed of 1717 MHz and a GDDR6 memory frequency of 1750 MHz. It also uses a 128-bit memory bus, and makes use of a 7 nm design. It is comprised of 1408 SPUs, 88 TAUs, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
Radeon RX 5500 XT		130 Watts
	Difference: 65 Watts (100%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 5500 XT should be much faster than the GeForce GT 640 DDR3 in general. (explain)

Radeon RX 5500 XT		229376 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 172352 (302%)

Texel Rate

The Radeon RX 5500 XT will be a lot (more or less 425%) faster with regards to AF than the GeForce GT 640 DDR3. (explain)

Radeon RX 5500 XT		151096 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 122296 (425%)

Pixel Rate

If using a high resolution is important to you, then the Radeon RX 5500 XT is a better choice, by far. (explain)

Radeon RX 5500 XT		54944 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 40544 (282%)

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 information (in units of megabytes per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write 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 - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.