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Geforce GTX 770 vs Radeon HD 7970

Intro

The Geforce GTX 770 comes with a GPU core clock speed of 1046 MHz, and the 2048 MB of GDDR5 RAM runs at 1753 MHz through a 256-bit bus. It also is made up of 1536 SPUs, 128 TAUs, and 32 ROPs.

Compare those specifications to the Radeon HD 7970, which features a core clock frequency of 925 MHz and a GDDR5 memory speed of 1375 MHz. It also makes use of a 384-bit bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 Texture Address Units, and 32 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 770 230 Watts
Radeon HD 7970 250 Watts
Difference: 20 Watts (9%)

Memory Bandwidth

The Radeon HD 7970, in theory, should be a little bit faster than the Geforce GTX 770 overall. (explain)

Radeon HD 7970 264000 MB/sec
Geforce GTX 770 224384 MB/sec
Difference: 39616 (18%)

Texel Rate

The Geforce GTX 770 is a little bit (more or less 13%) more effective at AF than the Radeon HD 7970. (explain)

Geforce GTX 770 133888 Mtexels/sec
Radeon HD 7970 118400 Mtexels/sec
Difference: 15488 (13%)

Pixel Rate

The Geforce GTX 770 is a little bit (about 13%) faster with regards to full screen anti-aliasing than the Radeon HD 7970, and also will be capable of handling higher resolutions without losing too much performance. (explain)

Geforce GTX 770 33472 Mpixels/sec
Radeon HD 7970 29600 Mpixels/sec
Difference: 3872 (13%)

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.

Price Comparison

Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.

Geforce GTX 770

Amazon.com

Other US-based stores

Radeon HD 7970

Amazon.com

Other US-based stores

Specifications

Model Geforce GTX 770 Radeon HD 7970
Manufacturer nVidia ATi
Year May 2013 January 2012
Code Name GK104 Tahiti XT
Fab Process 28 nm 28 nm
Bus PCIe 3.0 x16 PCIe 3.0 x16
Memory 2048 MB 3072 MB
Core Speed 1046 MHz 925 MHz
Shader Speed 1046 MHz (N/A) MHz
Memory Speed 1753 MHz (7012 MHz effective) 1375 MHz (5500 MHz effective)
Unified Shaders 1536 2048
Texture Mapping Units 128 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 384-bit
DirectX Version DirectX 11.0 DirectX 11.1
OpenGL Version OpenGL 4.3 OpenGL 4.2
Power (Max TDP) 230 watts 250 watts
Shader Model 5.0 5.0
Bandwidth 224384 MB/sec 264000 MB/sec
Texel Rate 133888 Mtexels/sec 118400 Mtexels/sec
Pixel Rate 33472 Mpixels/sec 29600 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the max amount of data (counted in megabytes per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher 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 number of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour 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 - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Comments

5 Responses to “Geforce GTX 770 vs Radeon HD 7970”
Blub says:
which card is better a msi r7970 lightning or evga 770 titan cooled ?
becouse i have a r7970 lightning.. :S
Scott says:
Depends, For video editing yes for most games, No. AMD Cards are better for Video editing and better at some games but Nividia is better for gaming, especially on the really popular games, BF3,Far Cry 3 ect... Those cards are pretty close though. The Asus 7970 ROG Matrix is better than the Lightning because of it's better cooling and heat dissipation. The 7970 ROG Matrix is also clocked to 316 GB/s and is much quieter and cooler than reference and lightning 7970's.
Hus says:
Add GHZ edition please
Lachlan says:
Add GHZ edition please
Bedendo says:
The Core Speed and Pixel Rate is wrong about 7970, fix this!

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