GeForce GTX 650 vs GeForce RTX 3080 12 GB

Intro

Compare that to the GeForce RTX 3080 12 GB, which makes use of a 8 nm design. nVidia has clocked the core frequency at 1260 MHz. The GDDR6X RAM runs at a frequency of 1188 MHz on this particular model. It features 8960 SPUs as well as 280 TAUs and 112 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce RTX 3080 12 GB		350 Watts
	Difference: 286 Watts (447%)

Memory Bandwidth

In theory, the GeForce RTX 3080 12 GB is 1068% faster than the GeForce GTX 650 overall, because of its greater bandwidth. (explain)

GeForce RTX 3080 12 GB		934298 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 854298 (1068%)

Texel Rate

The GeForce RTX 3080 12 GB will be a lot (more or less 942%) more effective at anisotropic filtering than the GeForce GTX 650. (explain)

GeForce RTX 3080 12 GB		352800 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 318944 (942%)

Pixel Rate

If using a high resolution is important to you, then the GeForce RTX 3080 12 GB is the winner, and very much so. (explain)

GeForce RTX 3080 12 GB		141120 Mpixels/sec
GeForce GTX 650		16928 Mpixels/sec
	Difference: 124192 (734%)

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 (counted in megabytes per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.