GeForce GT 640 DDR3 vs Radeon RX 6750 XT

Intro

Compare all of that to the Radeon RX 6750 XT, which uses a 7 nm design. AMD has set the core speed at 2150 MHz. The GDDR6 RAM is set to run at a speed of 2250 MHz on this particular card. It features 2560 SPUs along with 160 TAUs and 64 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
Radeon RX 6750 XT		250 Watts
	Difference: 185 Watts (285%)

Memory Bandwidth

In theory, the Radeon RX 6750 XT is 676% faster than the GeForce GT 640 DDR3 in general, because of its higher data rate. (explain)

Radeon RX 6750 XT		442368 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 385344 (676%)

Texel Rate

The Radeon RX 6750 XT will be a lot (approximately 1094%) faster with regards to texture filtering than the GeForce GT 640 DDR3. (explain)

Radeon RX 6750 XT		344000 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 315200 (1094%)

Pixel Rate

The Radeon RX 6750 XT should be much (about 856%) more effective at anti-aliasing than the GeForce GT 640 DDR3, and also able to handle higher screen resolutions more effectively. (explain)

Radeon RX 6750 XT		137600 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 123200 (856%)

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 (counted in MB per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total 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 processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 memory bandwidth is, the lower the potential to get to the maximum fill rate.