GeForce GT 640 DDR3 vs Radeon RX 6700 XT

Intro

Compare all that to the Radeon RX 6700 XT, which comes with clock speeds of 2321 MHz on the GPU, and 2000 MHz on the (Unknown) MB of GDDR6 RAM. It features 2560 SPUs as well as 160 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 6700 XT		230 Watts
	Difference: 165 Watts (254%)

Memory Bandwidth

As far as performance goes, the Radeon RX 6700 XT should theoretically be much better than the GeForce GT 640 DDR3 overall. (explain)

Radeon RX 6700 XT		393216 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 336192 (590%)

Texel Rate

The Radeon RX 6700 XT should be much (about 1189%) better at texture filtering than the GeForce GT 640 DDR3. (explain)

Radeon RX 6700 XT		371360 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 342560 (1189%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon RX 6700 XT is the winner, by a large margin. (explain)

Radeon RX 6700 XT		148544 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 134144 (932%)

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 information (in units of megabytes per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range 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 texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

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