GeForce RTX 3080 Ti vs Radeon HD 7990

Intro

Compare those specifications to the Radeon HD 7990, which has GPU core speed of 950 MHz, and 3072 MB of GDDR5 RAM running at 1500 MHz through a 384-bit bus. It also features 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 3080 Ti		350 Watts
Radeon HD 7990		375 Watts
	Difference: 25 Watts (7%)

Memory Bandwidth

Performance-wise, the GeForce RTX 3080 Ti should in theory be much superior to the Radeon HD 7990 in general. (explain)

GeForce RTX 3080 Ti		934297 MB/sec
Radeon HD 7990		576000 MB/sec
	Difference: 358297 (62%)

Texel Rate

The GeForce RTX 3080 Ti should be much (approximately 80%) better at texture filtering than the Radeon HD 7990. (explain)

GeForce RTX 3080 Ti		436800 Mtexels/sec
Radeon HD 7990		243200 Mtexels/sec
	Difference: 193600 (80%)

Pixel Rate

The GeForce RTX 3080 Ti will be a lot (approximately 151%) faster with regards to anti-aliasing than the Radeon HD 7990, and also capable of handling higher resolutions while still performing well. (explain)

GeForce RTX 3080 Ti		152880 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 92080 (151%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

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 a second. It is calculated by multiplying the bus width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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