GeForce GTX 660 vs Radeon RX 6800

Intro

Compare all of that to the Radeon RX 6800, which has GPU core speed of 1700 MHz, and 16384 MB of GDDR6 RAM set to run at 2000 MHz through a 256-bit bus. It also is made up of 3840 SPUs, 240 Texture Address Units, and 96 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660		140 Watts
Radeon RX 6800		250 Watts
	Difference: 110 Watts (79%)

Memory Bandwidth

The Radeon RX 6800 should theoretically perform much faster than the GeForce GTX 660 in general. (explain)

Radeon RX 6800		524288 MB/sec
GeForce GTX 660		144192 MB/sec
	Difference: 380096 (264%)

Texel Rate

The Radeon RX 6800 will be a lot (about 420%) faster with regards to anisotropic filtering than the GeForce GTX 660. (explain)

Radeon RX 6800		408000 Mtexels/sec
GeForce GTX 660		78400 Mtexels/sec
	Difference: 329600 (420%)

Pixel Rate

The Radeon RX 6800 should be a lot (about 594%) more effective at FSAA than the GeForce GTX 660, and should be able to handle higher resolutions without losing too much performance. (explain)

Radeon RX 6800		163200 Mpixels/sec
GeForce GTX 660		23520 Mpixels/sec
	Difference: 139680 (594%)

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 data (counted in MB per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The better this number, the better the video card will be at 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 card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the card's 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 quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.