GeForce GTX 980 Ti vs Radeon HD 7990

Intro

Compare those specifications to the Radeon HD 7990, which features core speeds of 950 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 memory. 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 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

In theory, the Radeon HD 7990 should be much faster than the GeForce GTX 980 Ti overall. (explain)

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

Texel Rate

The Radeon HD 7990 is a lot (approximately 38%) faster with regards to 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

The GeForce GTX 980 Ti should be a lot (approximately 58%) better at FSAA than the Radeon HD 7990, and will be able to handle higher screen resolutions better. (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: Bandwidth is the max amount of information (measured in MB per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is calculated 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 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 record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock 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 rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.