GeForce GT 640 DDR3 vs GeForce GTX 1630

Intro

Compare those specs to the GeForce GTX 1630, which makes use of a 12 nm design. nVidia has set the core frequency at 1740 MHz. The GDDR6 memory runs at a speed of 1500 MHz on this specific card. It features 512 SPUs along with 32 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
GeForce GTX 1630		75 Watts
	Difference: 10 Watts (15%)

Memory Bandwidth

In theory, the GeForce GTX 1630 should be a lot faster than the GeForce GT 640 DDR3 overall. (explain)

GeForce GTX 1630		98304 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 41280 (72%)

Texel Rate

The GeForce GTX 1630 will be quite a bit (approximately 93%) faster with regards to anisotropic filtering than the GeForce GT 640 DDR3. (explain)

GeForce GTX 1630		55680 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 26880 (93%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 1630 is the winner, by a large margin. (explain)

GeForce GTX 1630		27840 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 13440 (93%)

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 largest amount of data (in units of MB per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 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 anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's 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 fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.