GeForce GT 640 DDR3 vs GeForce GTX 1650

Intro

Compare all of that to the GeForce GTX 1650, which has a GPU core clock speed of 1485 MHz, and 4096 MB of GDDR5 RAM set to run at 2001 MHz through a 128-bit bus. It also is made up of 896 SPUs, 56 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
GeForce GTX 1650		75 Watts
	Difference: 10 Watts (15%)

Memory Bandwidth

The GeForce GTX 1650, in theory, should be quite a bit faster than the GeForce GT 640 DDR3 overall. (explain)

GeForce GTX 1650		131072 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 74048 (130%)

Texel Rate

The GeForce GTX 1650 is quite a bit (more or less 189%) more effective at texture filtering than the GeForce GT 640 DDR3. (explain)

GeForce GTX 1650		83160 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 54360 (189%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 1650 is the winner, and very much so. (explain)

GeForce GTX 1650		47520 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 33120 (230%)

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 moved across the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, 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 number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can 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 Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.