GeForce GT 640 DDR3 vs Radeon RX 6500 XT

Intro

Compare all of that to the Radeon RX 6500 XT, which features a GPU core clock speed of 2200 MHz, and 4096 MB of GDDR6 RAM running at 2250 MHz through a 64-bit bus. It also is made up of 1024 SPUs, 64 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 6500 XT		107 Watts
	Difference: 42 Watts (65%)

Memory Bandwidth

The Radeon RX 6500 XT should theoretically perform a lot faster than the GeForce GT 640 DDR3 overall. (explain)

Radeon RX 6500 XT		147456 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 90432 (159%)

Texel Rate

The Radeon RX 6500 XT is a lot (approximately 389%) faster with regards to anisotropic filtering than the GeForce GT 640 DDR3. (explain)

Radeon RX 6500 XT		140800 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 112000 (389%)

Pixel Rate

The Radeon RX 6500 XT will be quite a bit (approximately 389%) faster with regards to full screen anti-aliasing than the GeForce GT 640 DDR3, and also capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon RX 6500 XT		70400 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 56000 (389%)

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 max amount of data (counted in megabytes per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, it should 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the card will be at handling 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 per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.