GeForce GTX 980 vs Radeon HD 7990

Intro

Compare that to the Radeon HD 7990, which has GPU clock speed of 950 MHz, and 3072 MB of GDDR5 memory running at 1500 MHz through a 384-bit bus. It also is made up of 2048 Stream Processors, 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

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

In theory, the Radeon HD 7990 is 157% faster than the GeForce GTX 980 in general, because of its higher data rate. (explain)

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

Texel Rate

The Radeon HD 7990 is a lot (approximately 69%) faster with regards to AF than the GeForce GTX 980. (explain)

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

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 980 is superior to the Radeon HD 7990, but it probably won't make a huge difference. (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 information (measured in MB per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the bus 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 higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total number 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 in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). 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 potential to get to the max fill rate.