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GeForce GTX 970 vs Radeon HD 7770

Intro

The GeForce GTX 970 comes with a core clock speed of 1050 MHz and a GDDR5 memory speed of 1750 MHz. It also features a 256-bit bus, and uses a 28 nm design. It is comprised of 1664 SPUs, 104 TAUs, and 64 Raster Operation Units.

Compare those specs to the Radeon HD 7770, which has a core clock speed of 1000 MHz and a GDDR5 memory frequency of 1125 MHz. It also uses a 128-bit bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 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 970 10867 points
Radeon HD 7770 3180 points
Difference: 7687 (242%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770 80 Watts
GeForce GTX 970 145 Watts
Difference: 65 Watts (81%)

Memory Bandwidth

Theoretically, the GeForce GTX 970 should be quite a bit faster than the Radeon HD 7770 in general. (explain)

GeForce GTX 970 224000 MB/sec
Radeon HD 7770 72000 MB/sec
Difference: 152000 (211%)

Texel Rate

The GeForce GTX 970 should be quite a bit (more or less 173%) faster with regards to texture filtering than the Radeon HD 7770. (explain)

GeForce GTX 970 109200 Mtexels/sec
Radeon HD 7770 40000 Mtexels/sec
Difference: 69200 (173%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 970 is a better choice, by far. (explain)

GeForce GTX 970 67200 Mpixels/sec
Radeon HD 7770 16000 Mpixels/sec
Difference: 51200 (320%)

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 970

Amazon.com

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Radeon HD 7770

Amazon.com

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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 970 Radeon HD 7770
Manufacturer nVidia AMD
Year September 2014 February 2012
Code Name GM204-200 Cape Verde XT
Memory 4096 MB 1024 MB
Core Speed 1050 MHz 1000 MHz
Memory Speed 7000 MHz 4500 MHz
Power (Max TDP) 145 watts 80 watts
Bandwidth 224000 MB/sec 72000 MB/sec
Texel Rate 109200 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 67200 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 1664 640
Texture Mapping Units 104 40
Render Output Units 64 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 28 nm 28 nm
Transistors 5200 million 1500 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.2 DirectX 11.1
OpenGL Version OpenGL 4.5 OpenGL 4.2

Memory Bandwidth: Bandwidth is the largest amount of data (counted in MB per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total 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 most pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce GTX 970

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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