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Geforce GTX 670 vs Radeon HD 7770

Intro

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

Compare all that to the Radeon HD 7770, which makes use of a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 RAM is set to run at a frequency of 1125 MHz on this card. It features 640 SPUs as well as 40 Texture Address Units and 16 ROPs.

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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 7770 3180 points
Difference: 4171 (131%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770 80 Watts
Geforce GTX 670 170 Watts
Difference: 90 Watts (113%)

Memory Bandwidth

The Geforce GTX 670 should theoretically be much faster than the Radeon HD 7770 overall. (explain)

Geforce GTX 670 192000 MB/sec
Radeon HD 7770 72000 MB/sec
Difference: 120000 (167%)

Texel Rate

The Geforce GTX 670 will be quite a bit (approximately 156%) faster with regards to anisotropic filtering than the Radeon HD 7770. (explain)

Geforce GTX 670 102480 Mtexels/sec
Radeon HD 7770 40000 Mtexels/sec
Difference: 62480 (156%)

Pixel Rate

If running with high levels of AA is important to you, then the Geforce GTX 670 is superior to the Radeon HD 7770, by far. (explain)

Geforce GTX 670 29280 Mpixels/sec
Radeon HD 7770 16000 Mpixels/sec
Difference: 13280 (83%)

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

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Geforce GTX 670

Amazon.com

Check prices at:

Radeon HD 7770

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 7770
Manufacturer nVidia AMD
Year May 2012 February 2012
Code Name GK104 Cape Verde XT
Memory 2048 MB 1024 MB
Core Speed 915 MHz 1000 MHz
Memory Speed 6000 MHz 4500 MHz
Power (Max TDP) 170 watts 80 watts
Bandwidth 192000 MB/sec 72000 MB/sec
Texel Rate 102480 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 29280 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 1344 640
Texture Mapping Units 112 40
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 28 nm 28 nm
Transistors 3540 million 1500 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.1
OpenGL Version OpenGL 4.2 OpenGL 4.2

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's 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 fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Geforce GTX 670

Amazon.com

Check prices at:

Radeon HD 7770

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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