GeForce GT 640 DDR3 vs Radeon RX 5500 XT

Intro

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

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 overall. (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 is quite a bit (approximately 425%) more effective at 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 lots of anti-aliasing is important to you, then the Radeon RX 5500 XT is superior to the GeForce GT 640 DDR3, by a large margin. (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 maximum amount of data (counted in MB per second) that can be transported across the external memory interface in a second. It's calculated 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 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster 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 processed per second. This is calculated by multiplying the total number of texture units by the core 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 applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.