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Geforce GTX 670 vs Radeon HD 6990

Intro

The Geforce GTX 670 comes with core clock speeds of 915 MHz on the GPU, and 1500 MHz on the 2048 MB of GDDR5 RAM. It features 1344 SPUs as well as 112 Texture Address Units and 32 ROPs.

Compare those specs to the Radeon HD 6990, which comes with a core clock speed of 830 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 256-bit bus, and uses a 40 nm design. It features 1536 SPUs, 96 Texture Address Units, and 32 Raster Operation 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 will be 67% faster than the Geforce GTX 670 in general, due to its greater data rate. (explain)

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

Texel Rate

The Radeon HD 6990 should be a lot (approximately 56%) more effective at texture filtering 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 should be quite a bit (more or less 81%) better at full screen anti-aliasing than the Geforce GTX 670, and also able to handle higher screen resolutions while still performing well. (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 maximum amount of information (counted in megabytes per second) that can be moved past the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. 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 AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the 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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