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Geforce GTX 680 vs Radeon HD 7970

Intro

The Geforce GTX 680 has a core clock speed of 1006 MHz and a GDDR5 memory frequency of 1502 MHz. It also features a 256-bit bus, and uses a 28 nm design. It is made up of 1536 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Compare all that to the Radeon HD 7970, which comes with core speeds of 925 MHz on the GPU, and 1375 MHz on the 3072 MB of GDDR5 memory. It features 2048 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 680 195 Watts
Radeon HD 7970 250 Watts
Difference: 55 Watts (28%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7970 should in theory be quite a bit better than the Geforce GTX 680 overall. (explain)

Radeon HD 7970 264000 MB/sec
Geforce GTX 680 192256 MB/sec
Difference: 71744 (37%)

Texel Rate

The Geforce GTX 680 is a bit (approximately 9%) faster with regards to AF than the Radeon HD 7970. (explain)

Geforce GTX 680 128768 Mtexels/sec
Radeon HD 7970 118400 Mtexels/sec
Difference: 10368 (9%)

Pixel Rate

If using a high resolution is important to you, then the Geforce GTX 680 is superior to the Radeon HD 7970, though only just barely. (explain)

Geforce GTX 680 32192 Mpixels/sec
Radeon HD 7970 29600 Mpixels/sec
Difference: 2592 (9%)

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

Geforce GTX 680

Amazon.com

Radeon HD 7970

Amazon.com

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

Model Geforce GTX 680 Radeon HD 7970
Manufacturer nVidia AMD
Year March 2012 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 1006 MHz 925 MHz
Shader Speed 1006 MHz (N/A) MHz
Memory Speed 1502 MHz (6008 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 4.2 OpenGL 4.2
Power (Max TDP) 195 watts 250 watts
Shader Model 5.0 5.0
Bandwidth 192256 MB/sec 264000 MB/sec
Texel Rate 128768 Mtexels/sec 118400 Mtexels/sec
Pixel Rate 32192 Mpixels/sec 29600 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of data (in units of megabytes per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Comments

14 Responses to “Geforce GTX 680 vs Radeon HD 7970”
[...] Nu ma intereseaza OC la nimic de aici. Un link destul de relevant zic eu despre 680 si 7970: Geforce GTX 680 vs Radeon HD 7970 – Performance Comparison Benchmarks @ Hardware Compare If you GTFO, vampires won't catch you. Reply With [...]
[...] the Radeon HD 7970 should perform a lot faster than the Geforce GTX 680 overall. (explain) Radeon HD 7970 264000 MB/sec Geforce GTX 680 192256 MB/sec Difference: 71744 (37%) Texel [...]
omar farooq says:
I have The Radeon 7970 Sapphire Edition.In my opnion it's best graphic Card EVER.And if you download the new latest Beta Drivers.the FRAMS will be getting going Higher.And The 7970 is also Faster than GTX 680.So if someone is the FAN of AMD They can go for The 7970.And if someone is the FAN of Nvidia they can go for 680!both Cards are Awesome.And they dont have too much Difference too.!!So Personaly I LIKE RADEON 7970 HD.I LOVE IT.
Elias Maluco says:
"I have The Radeon 7970 Sapphire Edition.In my opnion it's best graphic Card EVER"

Did you see the GTX 690?

Ponas Nubas says:
"Did you see the GTX 690?"
Did you see the cost of the gtx690?
tautve says:
Still GTX 690 is easily best because of its dual gpu. Also, when HD 7990 comes out GTX 690's price should drop by quite a bit. By how much it depends on how good HD 7990 will be in comparison to GTX 690.
scho says:
The 680 beats the hd7970 needs 55 more watts and according to this is beats it 2 out of 3. Nvidia FTW
Nick says:
what about physics ?
ds says:
New amd drivers change the game i just bought a hd7970 for 380$
Stefan says:
Aha compare last and last
GeForce GTX 690 and Radeon 7970
steven says:
well to be honest i have look all over the internet i belive the 7970 ghz edition is the best. The test here only shows 925 mhz model i have the 1010 ghz 5500 ghz mem MSI model . i belive it beats the 680 on price bench marks ok not all but most on directX 10 and 11 ok 680 wins on directX 9 but who cars out old games want sim frame rates and save money i say nomore paid £310 7970 £400 680
prolific says:
Why would you compare the 690 and the 7970??? The 690 is a dual two 680's on one card...the 680 vs the 7970 is the comparison that matters. Compare the GTX 690 to the HD 7990...
Larksea says:
benchmarks suggest the cards are very even, which is better depends on the game.

Maybe the edge the 7970 has on paper is made up for by the overall better quality and support nvidia drivers offer.

The tie breaker for me is power usage - the GTX680 wins.

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