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Geforce GTX 670 vs Geforce GTX 680

Intro

The Geforce GTX 670 uses a 28 nm design. nVidia has clocked the core speed at 915 MHz. The GDDR5 memory runs at a frequency of 1500 MHz on this particular card. It features 1344 SPUs as well as 112 Texture Address Units and 32 ROPs.

Compare that to the Geforce GTX 680, which comes with core clock speeds of 1006 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 memory. It features 1536 SPUs as well as 128 TAUs and 32 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 670 170 Watts
Geforce GTX 680 195 Watts
Difference: 25 Watts (15%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 680 is 0% quicker than the Geforce GTX 670 in general, due to its greater bandwidth. (explain)

Geforce GTX 680 192256 MB/sec
Geforce GTX 670 192000 MB/sec
Difference: 256 (0%)

Texel Rate

The Geforce GTX 680 is a lot (about 26%) better at anisotropic filtering than the Geforce GTX 670. (explain)

Geforce GTX 680 128768 Mtexels/sec
Geforce GTX 670 102480 Mtexels/sec
Difference: 26288 (26%)

Pixel Rate

The Geforce GTX 680 will be just a bit (more or less 10%) faster with regards to AA than the Geforce GTX 670, and also will be capable of handling higher resolutions while still performing well. (explain)

Geforce GTX 680 32192 Mpixels/sec
Geforce GTX 670 29280 Mpixels/sec
Difference: 2912 (10%)

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 670

Amazon.com

Geforce GTX 680

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 670 Geforce GTX 680
Manufacturer nVidia nVidia
Year May 2012 March 2012
Code Name GK104 GK104
Fab Process 28 nm 28 nm
Bus PCIe 3.0 x16 PCIe 3.0 x16
Memory 2048 MB 2048 MB
Core Speed 915 MHz 1006 MHz
Shader Speed 915 MHz 1006 MHz
Memory Speed 1500 MHz (6000 MHz effective) 1502 MHz (6008 MHz effective)
Unified Shaders 1344 1536
Texture Mapping Units 112 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
DirectX Version DirectX 11.0 DirectX 11.0
OpenGL Version OpenGL 4.2 OpenGL 4.2
Power (Max TDP) 170 watts 195 watts
Shader Model 5.0 5.0
Bandwidth 192000 MB/sec 192256 MB/sec
Texel Rate 102480 Mtexels/sec 128768 Mtexels/sec
Pixel Rate 29280 Mpixels/sec 32192 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of information (measured in MB per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 amount of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of 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.

Comments

4 Responses to “Geforce GTX 670 vs Geforce GTX 680”
Adnan says:
I was thinking about getting a gtx 680. But given the specifications and price performance ratio, 670 should be a better choice is money is a factor to you. 670 is more than 100 dollar cheaper than 680 and you get a performance drop only 5-6%. Search in the google for their benchmark and you will be amazed at how gtx 680 and gtx 670 go neck to neck. If overclocked, gtx 670 can easily surpass a stock gtx 680. The memory bandwitdh and vedeo ram are the same!
Ankit says:
thanks for info in going with gtx 670
anoyness says:
I'm getting a gtx680 for about the same price as a 670 you OC your 670 to my 680 but then i OC my 680 200mhz
scott says:
I Am defiantly going to go with a GTX 680, even though more expensive, i will buy the super over clock version which is much faster with better cooling.

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