GeForce GTX 980 Ti vs Radeon HD 7990

Intro

Compare those specs to the Radeon HD 7990, which has a clock speed of 950 MHz and a GDDR5 memory frequency of 1500 MHz. It also makes use of a 384-bit memory bus, and makes use of a 28 nm design. It is made up of 2048 SPUs, 128 TAUs, and 32 ROPs.

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 980 Ti		17120 points
Radeon HD 7990		15520 points
	Difference: 1600 (10%)

Zcash Mining Hash Rate

Radeon HD 7990		513 Sol/s
GeForce GTX 980 Ti		425 Sol/s
	Difference: 88 (21%)

Ethereum Mining Hash Rate

Radeon HD 7990		32 Mh/s
GeForce GTX 980 Ti		22 Mh/s
	Difference: 10 (45%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980 Ti		250 Watts
Radeon HD 7990		375 Watts
	Difference: 125 Watts (50%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7990 should be a lot faster than the GeForce GTX 980 Ti in general. (explain)

Radeon HD 7990		576000 MB/sec
GeForce GTX 980 Ti		336000 MB/sec
	Difference: 240000 (71%)

Texel Rate

The Radeon HD 7990 should be much (more or less 38%) better at AF than the GeForce GTX 980 Ti. (explain)

Radeon HD 7990		243200 Mtexels/sec
GeForce GTX 980 Ti		176000 Mtexels/sec
	Difference: 67200 (38%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 980 Ti is the winner, by a large margin. (explain)

GeForce GTX 980 Ti		96000 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 35200 (58%)

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 largest amount of information (in units of MB per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. 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 applied per second. This number 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels 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 amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.