Geforce GTX 770 vs Radeon HD 7990

Intro

Compare all of that to the Radeon HD 7990, which has a clock frequency of 950 MHz and a GDDR5 memory frequency of 1500 MHz. It also makes use of a 384-bit bus, and makes use of a 28 nm design. It is made up of 2048 SPUs, 128 Texture Address Units, and 32 Raster Operation 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 770		7854 points
	Difference: 7666 (98%)

Ethereum Mining Hash Rate

Radeon HD 7990		32 Mh/s
Geforce GTX 770		14 Mh/s
	Difference: 18 (129%)

Zcash Mining Hash Rate

Radeon HD 7990		513 Sol/s
Geforce GTX 770		70 Sol/s
	Difference: 443 (633%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 770		230 Watts
Radeon HD 7990		375 Watts
	Difference: 145 Watts (63%)

Memory Bandwidth

In theory, the Radeon HD 7990 should perform quite a bit faster than the Geforce GTX 770 overall. (explain)

Radeon HD 7990		576000 MB/sec
Geforce GTX 770		224384 MB/sec
	Difference: 351616 (157%)

Texel Rate

The Radeon HD 7990 should be much (about 82%) faster with regards to AF than the Geforce GTX 770. (explain)

Radeon HD 7990		243200 Mtexels/sec
Geforce GTX 770		133888 Mtexels/sec
	Difference: 109312 (82%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 7990 is the winner, by a large margin. (explain)

Radeon HD 7990		60800 Mpixels/sec
Geforce GTX 770		33472 Mpixels/sec
	Difference: 27328 (82%)

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 maximum amount of data (in units of megabytes per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 applied per second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, 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 maximum number of pixels the video card can 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 ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill 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.