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Geforce GTX 770 vs Radeon HD 7990

Intro

The Geforce GTX 770 makes use of a 28 nm design. nVidia has clocked the core speed at 1046 MHz. The GDDR5 memory runs at a speed of 1753 MHz on this particular model. It features 1536 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

Compare all that to the Radeon HD 7990, which features GPU core speed of 950 MHz, and 3072 MB of GDDR5 RAM set to run 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 7837 points
Difference: 7683 (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

Performance-wise, the Radeon HD 7990 should theoretically be quite a bit better 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 quite a bit (more or less 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

The Radeon HD 7990 is quite a bit (approximately 82%) more effective at AA than the Geforce GTX 770, and also will be capable of handling 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

Geforce GTX 770

Radeon HD 7990

Specifications

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Model Geforce GTX 770 Radeon HD 7990
Manufacturer nVidia AMD
Year May 2013 April 2013
Code Name GK104 Malta
Memory 2048 MB 3072 MB (x2)
Core Speed 1046 MHz 950 MHz (x2)
Memory Speed 7012 MHz 6000 MHz (x2)
Power (Max TDP) 230 watts 375 watts
Bandwidth 224384 MB/sec 576000 MB/sec
Texel Rate 133888 Mtexels/sec 243200 Mtexels/sec
Pixel Rate 33472 Mpixels/sec 60800 Mpixels/sec
Unified Shaders 1536 2048 (x2)
Texture Mapping Units 128 128 (x2)
Render Output Units 32 32 (x2)
Bus Type GDDR5 GDDR5
Bus Width 256-bit 384-bit (x2)
Fab Process 28 nm 28 nm
Transistors 3540 million 4313 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.1
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the bus width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines 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 output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Geforce GTX 770

Radeon HD 7990

Comments

2 Responses to “Geforce GTX 770 vs Radeon HD 7990”
Anonymous says:

nice compare !

Anonymous says:

nice comparealert('nice compare!');

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