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Radeon HD 6770 vs Radeon R9 M395X

Intro

The Radeon HD 6770 comes with a GPU core speed of 900 MHz, and the 512 MB of GDDR5 RAM runs at 1050 MHz through a 128-bit bus. It also is made up of 800 Stream Processors, 40 TAUs, and 16 Raster Operation Units.

Compare all that to the Radeon R9 M395X, which comes with a GPU core clock speed of 723 MHz, and 4096 MB of GDDR5 memory running at 1250 MHz through a 256-bit bus. It also features 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 108 Watts
Radeon R9 M395X 125 Watts
Difference: 17 Watts (16%)

Memory Bandwidth

In theory, the Radeon R9 M395X should perform a lot faster than the Radeon HD 6770 overall. (explain)

Radeon R9 M395X 160000 MB/sec
Radeon HD 6770 67200 MB/sec
Difference: 92800 (138%)

Texel Rate

The Radeon R9 M395X should be quite a bit (about 157%) more effective at anisotropic filtering than the Radeon HD 6770. (explain)

Radeon R9 M395X 92544 Mtexels/sec
Radeon HD 6770 36000 Mtexels/sec
Difference: 56544 (157%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 M395X is superior to the Radeon HD 6770, by a large margin. (explain)

Radeon R9 M395X 23136 Mpixels/sec
Radeon HD 6770 14400 Mpixels/sec
Difference: 8736 (61%)

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 M395X

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 M395X
Manufacturer AMD AMD
Year January 2011 2015
Code Name Juniper XT Tonga
Memory 512 MB 4096 MB
Core Speed 900 MHz 723 MHz
Memory Speed 4200 MHz 5000 MHz
Power (Max TDP) 108 watts 125 watts
Bandwidth 67200 MB/sec 160000 MB/sec
Texel Rate 36000 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 14400 Mpixels/sec 23136 Mpixels/sec
Unified Shaders 800 2048
Texture Mapping Units 40 128
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 1040 million (Unknown) million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 12
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of data (in units of MB per second) that can be moved past the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 are processed in one second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling 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 graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 6770

Amazon.com

Check prices at:

Radeon R9 M395X

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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