GeForce GT 640 DDR3 vs GeForce RTX 2080 Ti

Intro

Compare that to the GeForce RTX 2080 Ti, which has core clock speeds of 1350 MHz on the GPU, and 1750 MHz on the 11264 MB of GDDR6 RAM. It features 4352 SPUs along with 272 TAUs and 88 ROPs.

Display Graphs

Hide Graphs

Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce RTX 2080 Ti		31381 points
GeForce GT 640 DDR3		1560 points
	Difference: 29821 (1912%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3		65 Watts
GeForce RTX 2080 Ti		250 Watts
	Difference: 185 Watts (285%)

Memory Bandwidth

The GeForce RTX 2080 Ti should in theory be quite a bit faster than the GeForce GT 640 DDR3 overall. (explain)

GeForce RTX 2080 Ti		630784 MB/sec
GeForce GT 640 DDR3		57024 MB/sec
	Difference: 573760 (1006%)

Texel Rate

The GeForce RTX 2080 Ti will be a lot (more or less 1175%) faster with regards to texture filtering than the GeForce GT 640 DDR3. (explain)

GeForce RTX 2080 Ti		367200 Mtexels/sec
GeForce GT 640 DDR3		28800 Mtexels/sec
	Difference: 338400 (1175%)

Pixel Rate

The GeForce RTX 2080 Ti is much (more or less 725%) more effective at AA than the GeForce GT 640 DDR3, and also capable of handling higher resolutions without slowing down too much. (explain)

GeForce RTX 2080 Ti		118800 Mpixels/sec
GeForce GT 640 DDR3		14400 Mpixels/sec
	Difference: 104400 (725%)

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 information (measured in MB per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the 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 most pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.