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Radeon HD 6770 vs Radeon R9 390X 8G

Intro

The Radeon HD 6770 has core speeds of 900 MHz on the GPU, and 1050 MHz on the 512 MB of GDDR5 RAM. It features 800 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Compare those specifications to the Radeon R9 390X 8G, which makes use of a 28 nm design. AMD has set the core speed at 1050 MHz. The GDDR5 memory runs at a frequency of 1500 MHz on this particular card. It features 2816 SPUs along with 176 Texture Address Units and 64 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

Radeon R9 390X 8G 13555 points
Radeon HD 6770 1520 points
Difference: 12035 (792%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 108 Watts
Radeon R9 390X 8G 275 Watts
Difference: 167 Watts (155%)

Memory Bandwidth

Theoretically, the Radeon R9 390X 8G should be quite a bit faster than the Radeon HD 6770 in general. (explain)

Radeon R9 390X 8G 384000 MB/sec
Radeon HD 6770 67200 MB/sec
Difference: 316800 (471%)

Texel Rate

The Radeon R9 390X 8G will be a lot (about 413%) more effective at anisotropic filtering than the Radeon HD 6770. (explain)

Radeon R9 390X 8G 184800 Mtexels/sec
Radeon HD 6770 36000 Mtexels/sec
Difference: 148800 (413%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 390X 8G is superior to the Radeon HD 6770, by far. (explain)

Radeon R9 390X 8G 67200 Mpixels/sec
Radeon HD 6770 14400 Mpixels/sec
Difference: 52800 (367%)

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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Radeon HD 6770

Amazon.com

Check prices at:

Radeon R9 390X 8G

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 Radeon HD 6770 Radeon R9 390X 8G
Manufacturer AMD AMD
Year January 2011 June 2015
Code Name Juniper XT Grenada XT
Memory 512 MB 8192 MB
Core Speed 900 MHz 1050 MHz
Memory Speed 4200 MHz 6000 MHz
Power (Max TDP) 108 watts 275 watts
Bandwidth 67200 MB/sec 384000 MB/sec
Texel Rate 36000 Mtexels/sec 184800 Mtexels/sec
Pixel Rate 14400 Mpixels/sec 67200 Mpixels/sec
Unified Shaders 800 2816
Texture Mapping Units 40 176
Render Output Units 16 64
Bus Type GDDR5 GDDR5
Bus Width 128-bit 512-bit
Fab Process 40 nm 28 nm
Transistors 1040 million 6200 million
Bus PCIe x16 PCIe 3.0 ×16
DirectX Version DirectX 11 DirectX 12.0
OpenGL Version OpenGL 4.1 OpenGL 4.5

Memory Bandwidth: Bandwidth is the max amount of data (measured in megabytes per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the video 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 amount of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. 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 is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 6770

Amazon.com

Check prices at:

Radeon R9 390X 8G

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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