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Radeon HD 6770 vs Radeon R9 M265X

Intro

The Radeon HD 6770 uses a 40 nm design. AMD has set the core speed at 900 MHz. The GDDR5 memory works at a frequency of 1050 MHz on this particular model. It features 800 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Compare all that to the Radeon R9 M265X, which has core clock speeds of 575 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 memory. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon R9 M265X should be a small bit faster than the Radeon HD 6770 in general. (explain)

Radeon R9 M265X 72000 MB/sec
Radeon HD 6770 67200 MB/sec
Difference: 4800 (7%)

Texel Rate

The Radeon HD 6770 should be much (about 57%) more effective at texture filtering than the Radeon R9 M265X. (explain)

Radeon HD 6770 36000 Mtexels/sec
Radeon R9 M265X 23000 Mtexels/sec
Difference: 13000 (57%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6770 is superior to the Radeon R9 M265X, by a large margin. (explain)

Radeon HD 6770 14400 Mpixels/sec
Radeon R9 M265X 9200 Mpixels/sec
Difference: 5200 (57%)

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 M265X

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 M265X
Manufacturer AMD AMD
Year January 2011 May 1 2014
Code Name Juniper XT Venus Pro
Memory 512 MB 2048 MB
Core Speed 900 MHz 575 MHz
Memory Speed 4200 MHz 4500 MHz
Power (Max TDP) 108 watts (Unknown) watts
Bandwidth 67200 MB/sec 72000 MB/sec
Texel Rate 36000 Mtexels/sec 23000 Mtexels/sec
Pixel Rate 14400 Mpixels/sec 9200 Mpixels/sec
Unified Shaders 800 640
Texture Mapping Units 40 40
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 1040 million (Unknown) million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.2
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of information (measured in megabytes per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, it 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 anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory 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 M265X

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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