GeForce GTX 650 vs GeForce RTX 4080

Intro

Compare those specs to the GeForce RTX 4080, which comes with a clock frequency of 2205 MHz and a GDDR6X memory speed of 1400 MHz. It also makes use of a 256-bit memory bus, and uses a 4 nm design. It is comprised of 9728 SPUs, 304 TAUs, and 112 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce RTX 4080		320 Watts
	Difference: 256 Watts (400%)

Memory Bandwidth

Performance-wise, the GeForce RTX 4080 should theoretically be a lot superior to the GeForce GTX 650 in general. (explain)

GeForce RTX 4080		734003 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 654003 (818%)

Texel Rate

The GeForce RTX 4080 should be quite a bit (approximately 1880%) more effective at anisotropic filtering than the GeForce GTX 650. (explain)

GeForce RTX 4080		670320 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 636464 (1880%)

Pixel Rate

The GeForce RTX 4080 should be quite a bit (approximately 1359%) faster with regards to FSAA than the GeForce GTX 650, and capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce RTX 4080		246960 Mpixels/sec
GeForce GTX 650		16928 Mpixels/sec
	Difference: 230032 (1359%)

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 maximum amount of information (in units of MB per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.