GeForce GTX 980 vs Radeon HD 7990

Intro

Compare those specs to the Radeon HD 7990, which uses a 28 nm design. AMD has clocked the core frequency at 950 MHz. The GDDR5 RAM runs at a speed of 1500 MHz on this specific model. It features 2048 SPUs along with 128 TAUs 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

Radeon HD 7990		15520 points
GeForce GTX 980		13552 points
	Difference: 1968 (15%)

Ethereum Mining Hash Rate

Radeon HD 7990		32 Mh/s
GeForce GTX 980		20 Mh/s
	Difference: 12 (60%)

Zcash Mining Hash Rate

Radeon HD 7990		513 Sol/s
GeForce GTX 980		408 Sol/s
	Difference: 105 (26%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980		165 Watts
Radeon HD 7990		375 Watts
	Difference: 210 Watts (127%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7990 should be 157% faster than the GeForce GTX 980 in general, due to its greater bandwidth. (explain)

Radeon HD 7990		576000 MB/sec
GeForce GTX 980		224000 MB/sec
	Difference: 352000 (157%)

Texel Rate

The Radeon HD 7990 should be a lot (approximately 69%) faster with regards to texture filtering than the GeForce GTX 980. (explain)

Radeon HD 7990		243200 Mtexels/sec
GeForce GTX 980		144128 Mtexels/sec
	Difference: 99072 (69%)

Pixel Rate

The GeForce GTX 980 will be a bit (more or less 19%) more effective at AA than the Radeon HD 7990, and will be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 980		72064 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 11264 (19%)

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 data (counted in megabytes per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant 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.