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GeForce GTX 980 Ti vs Radeon RX 6700 XT

Intro

The GeForce GTX 980 Ti uses a 28 nm design. nVidia has clocked the core speed at 1000 MHz. The GDDR5 memory runs at a frequency of 1750 MHz on this specific model. It features 2816 SPUs along with 176 Texture Address Units and 96 ROPs.

Compare all of that to the Radeon RX 6700 XT, which has GPU core speed of 2321 MHz, and (Unknown) MB of GDDR6 memory set to run at 2000 MHz through a 192-bit bus. It also features 2560 SPUs, 160 Texture Address Units, and 64 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6700 XT		230 Watts
GeForce GTX 980 Ti		250 Watts
	Difference: 20 Watts (9%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6700 XT should be 17% quicker than the GeForce GTX 980 Ti in general, because of its greater bandwidth. (explain)

Radeon RX 6700 XT		393216 MB/sec
GeForce GTX 980 Ti		336000 MB/sec
	Difference: 57216 (17%)

Texel Rate

The Radeon RX 6700 XT should be much (approximately 111%) better at texture filtering than the GeForce GTX 980 Ti. (explain)

Radeon RX 6700 XT		371360 Mtexels/sec
GeForce GTX 980 Ti		176000 Mtexels/sec
	Difference: 195360 (111%)

Pixel Rate

If using a high resolution is important to you, then the Radeon RX 6700 XT is superior to the GeForce GTX 980 Ti, and very much so. (explain)

Radeon RX 6700 XT		148544 Mpixels/sec
GeForce GTX 980 Ti		96000 Mpixels/sec
	Difference: 52544 (55%)

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

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GeForce GTX 980 Ti

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Radeon RX 6700 XT

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Specifications

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Model	GeForce GTX 980 Ti	Radeon RX 6700 XT
Manufacturer	nVidia	AMD
Year	June 2015	March 2021
Code Name	GM200	Navi 22
Memory	6144 MB	(Unknown) MB
Core Speed	1000 MHz	2321 MHz
Memory Speed	7000 MHz	4000 GB/s
Power (Max TDP)	250 watts	230 watts
Bandwidth	336000 MB/sec	393216 MB/sec
Texel Rate	176000 Mtexels/sec	371360 Mtexels/sec
Pixel Rate	96000 Mpixels/sec	148544 Mpixels/sec
Unified Shaders	2816	2560
Texture Mapping Units	176	160
Render Output Units	96	64
Bus Type	GDDR5	GDDR6
Bus Width	384-bit	192-bit
Fab Process	28 nm	7 nm
Transistors	8000 million	17200 million
Bus	PCIe 3.0 x16	PCIe 4.0 x16
DirectX Version	DirectX 12.0	DirectX 12
OpenGL Version	OpenGL 4.5	OpenGL 4.6

Memory Bandwidth: Memory bandwidth is the max amount of data (counted in megabytes per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

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