GeForce GT 640 DDR3 vs GeForce GTX 1650

Intro

Compare all that to the GeForce GTX 1650, which has a clock frequency of 1485 MHz and a GDDR5 memory frequency of 2001 MHz. It also makes use of a 128-bit bus, and makes use of a 12 nm design. It is comprised of 896 SPUs, 56 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
GeForce GTX 1650		75 Watts
	Difference: 10 Watts (15%)

Memory Bandwidth

The GeForce GTX 1650 should in theory be much faster than the GeForce GT 640 DDR3 in general. (explain)

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

Texel Rate

The GeForce GTX 1650 should be much (approximately 189%) more effective at AF 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

The GeForce GTX 1650 should be quite a bit (approximately 230%) faster with regards to FSAA than the GeForce GT 640 DDR3, and also able to handle higher screen resolutions while still performing well. (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 largest amount of information (in units of MB per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the bus width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.