Geforce GTX 1080 Ti vs Radeon HD 7990

Intro

Compare those specs to the Radeon HD 7990, which makes use of a 28 nm design. AMD has set the core speed at 950 MHz. The GDDR5 RAM is set to run at a speed of 1500 MHz on this particular model. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Geforce GTX 1080 Ti		27629 points
Radeon HD 7990		15520 points
	Difference: 12109 (78%)

Zcash Mining Hash Rate

Geforce GTX 1080 Ti		710 Sol/s
Radeon HD 7990		513 Sol/s
	Difference: 197 (38%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 1080 Ti		250 Watts
Radeon HD 7990		375 Watts
	Difference: 125 Watts (50%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7990 should be 16% faster than the Geforce GTX 1080 Ti in general, because of its higher bandwidth. (explain)

Radeon HD 7990		576000 MB/sec
Geforce GTX 1080 Ti		495616 MB/sec
	Difference: 80384 (16%)

Texel Rate

The Geforce GTX 1080 Ti will be quite a bit (about 36%) more effective at anisotropic filtering than the Radeon HD 7990. (explain)

Geforce GTX 1080 Ti		331520 Mtexels/sec
Radeon HD 7990		243200 Mtexels/sec
	Difference: 88320 (36%)

Pixel Rate

The Geforce GTX 1080 Ti is much (more or less 114%) better at FSAA than the Radeon HD 7990, and also able to handle higher screen resolutions without losing too much performance. (explain)

Geforce GTX 1080 Ti		130240 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 69440 (114%)

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 (counted in MB per second) that can be transported over the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate 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 outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.