GeForce GTX 1080 vs Radeon HD 7990

Intro

Compare that to the Radeon HD 7990, which comes with a GPU core clock speed of 950 MHz, and 3072 MB of GDDR5 RAM running at 1500 MHz through a 384-bit bus. It also is comprised of 2048 Stream Processors, 128 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

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		21942 points
Radeon HD 7990		15520 points
	Difference: 6422 (41%)

Zcash Mining Hash Rate

GeForce GTX 1080		553 Sol/s
Radeon HD 7990		513 Sol/s
	Difference: 40 (8%)

Ethereum Mining Hash Rate

Radeon HD 7990		32 Mh/s
GeForce GTX 1080		20 Mh/s
	Difference: 12 (60%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 1080		180 Watts
Radeon HD 7990		375 Watts
	Difference: 195 Watts (108%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7990 should perform a lot faster than the GeForce GTX 1080 overall. (explain)

Radeon HD 7990		576000 MB/sec
GeForce GTX 1080		327680 MB/sec
	Difference: 248320 (76%)

Texel Rate

The GeForce GTX 1080 should be a small bit (about 6%) more effective at AF than the Radeon HD 7990. (explain)

GeForce GTX 1080		257120 Mtexels/sec
Radeon HD 7990		243200 Mtexels/sec
	Difference: 13920 (6%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 1080 is a better choice, by a large margin. (explain)

GeForce GTX 1080		102848 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 42048 (69%)

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 largest amount of information (counted in MB per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.