GeForce RTX 2080 SUPER vs Radeon HD 7990

Intro

Compare those specs to the Radeon HD 7990, which has GPU clock speed of 950 MHz, and 3072 MB of GDDR5 memory set to run at 1500 MHz through a 384-bit bus. It also is comprised of 2048 Stream Processors, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 2080 SUPER		250 Watts
Radeon HD 7990		375 Watts
	Difference: 125 Watts (50%)

Memory Bandwidth

In theory, the Radeon HD 7990 should perform a bit faster than the GeForce RTX 2080 SUPER overall. (explain)

Radeon HD 7990		576000 MB/sec
GeForce RTX 2080 SUPER		507904 MB/sec
	Difference: 68096 (13%)

Texel Rate

The GeForce RTX 2080 SUPER will be much (more or less 30%) better at AF than the Radeon HD 7990. (explain)

GeForce RTX 2080 SUPER		316800 Mtexels/sec
Radeon HD 7990		243200 Mtexels/sec
	Difference: 73600 (30%)

Pixel Rate

The GeForce RTX 2080 SUPER should be a lot (approximately 74%) faster with regards to anti-aliasing than the Radeon HD 7990, and also should be capable of handling higher resolutions while still performing well. (explain)

GeForce RTX 2080 SUPER		105600 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 44800 (74%)

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: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transported over the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the 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 amount of texture map elements (texels) that can be applied 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 graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

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