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Geforce GTX 670 vs Radeon HD 6990

Intro

The Geforce GTX 670 features a clock frequency of 915 MHz and a GDDR5 memory speed of 1500 MHz. It also uses a 256-bit bus, and uses a 28 nm design. It features 1344 SPUs, 112 Texture Address Units, and 32 ROPs.

Compare all that to the Radeon HD 6990, which comes with core speeds of 830 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs along with 96 TAUs and 32 Rasterization Operator Units.

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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

Geforce GTX 670 7351 points
Radeon HD 6990 5820 points
Difference: 1531 (26%)

Ethereum Mining Hash Rate

Radeon HD 6990 24 Mh/s
Geforce GTX 670 13 Mh/s
Difference: 11 (85%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 670 170 Watts
Radeon HD 6990 375 Watts
Difference: 205 Watts (121%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6990 should perform much faster than the Geforce GTX 670 overall. (explain)

Radeon HD 6990 320000 MB/sec
Geforce GTX 670 192000 MB/sec
Difference: 128000 (67%)

Texel Rate

The Radeon HD 6990 is much (approximately 56%) faster with regards to AF than the Geforce GTX 670. (explain)

Radeon HD 6990 159360 Mtexels/sec
Geforce GTX 670 102480 Mtexels/sec
Difference: 56880 (56%)

Pixel Rate

The Radeon HD 6990 will be much (approximately 81%) faster with regards to full screen anti-aliasing than the Geforce GTX 670, and capable of handling higher screen resolutions more effectively. (explain)

Radeon HD 6990 53120 Mpixels/sec
Geforce GTX 670 29280 Mpixels/sec
Difference: 23840 (81%)

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

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Geforce GTX 670

Amazon.com

Check prices at:

Radeon HD 6990

Amazon.com

Check prices at:

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

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Model Geforce GTX 670 Radeon HD 6990
Manufacturer nVidia AMD
Year May 2012 March 2011
Code Name GK104 Antilles
Memory 2048 MB 2048 MB (x2)
Core Speed 915 MHz 830 MHz (x2)
Memory Speed 6000 MHz 5000 MHz (x2)
Power (Max TDP) 170 watts 375 watts
Bandwidth 192000 MB/sec 320000 MB/sec
Texel Rate 102480 Mtexels/sec 159360 Mtexels/sec
Pixel Rate 29280 Mpixels/sec 53120 Mpixels/sec
Unified Shaders 1344 1536 (x2)
Texture Mapping Units 112 96 (x2)
Render Output Units 32 32 (x2)
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit (x2)
Fab Process 28 nm 40 nm
Transistors 3540 million 2640 million
Bus PCIe 3.0 x16 PCIe 2.1 x16
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.2 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at 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 the video card could possibly write to its local memory per second - measured in millions of pixels per second. The number 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 fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Geforce GTX 670

Amazon.com

Check prices at:

Radeon HD 6990

Amazon.com

Check prices at:

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.

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