Geforce GTX 770 vs Radeon HD 7990

Intro

Compare those specifications to the Radeon HD 7990, which features GPU core speed of 950 MHz, and 3072 MB of GDDR5 memory running at 1500 MHz through a 384-bit bus. It also features 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

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

Theoretically speaking, the Radeon HD 7990 should perform quite a bit faster than the Geforce GTX 770 in general. (explain)

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

Texel Rate

The Radeon HD 7990 is a lot (about 82%) better at texture filtering than the Geforce GTX 770. (explain)

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

Pixel Rate

The Radeon HD 7990 should be quite a bit (about 82%) faster with regards to FSAA than the Geforce GTX 770, and will be able to handle higher screen resolutions better. (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: Memory bandwidth is the max amount of information (measured in MB per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends 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.