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Radeon HD 5770 vs Radeon HD 6670 (OEM) 1GB


The Radeon HD 5770 has core speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Compare all that to the Radeon HD 6670 (OEM) 1GB, which has a core clock frequency of 800 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 128-bit bus, and uses a 40 nm design. It is comprised of 480 SPUs, 24 Texture Address Units, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 1GB 63 Watts
Radeon HD 5770 108 Watts
Difference: 45 Watts (71%)

Memory Bandwidth

Performance-wise, the Radeon HD 5770 should theoretically be a small bit superior to the Radeon HD 6670 (OEM) 1GB overall. (explain)

Radeon HD 5770 76800 MB/sec
Radeon HD 6670 (OEM) 1GB 64000 MB/sec
Difference: 12800 (20%)

Texel Rate

The Radeon HD 5770 is quite a bit (more or less 77%) better at anisotropic filtering than the Radeon HD 6670 (OEM) 1GB. (explain)

Radeon HD 5770 34000 Mtexels/sec
Radeon HD 6670 (OEM) 1GB 19200 Mtexels/sec
Difference: 14800 (77%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 5770 is a better choice, and very much so. (explain)

Radeon HD 5770 13600 Mpixels/sec
Radeon HD 6670 (OEM) 1GB 6400 Mpixels/sec
Difference: 7200 (113%)

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 5770

Radeon HD 6670 (OEM) 1GB

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.


Display Specifications

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Model Radeon HD 5770 Radeon HD 6670 (OEM) 1GB
Manufacturer AMD AMD
Year October 13, 2009 February 2011
Code Name Juniper XT Turks
Memory 1024 MB 1024 MB
Core Speed 850 MHz 800 MHz
Memory Speed 4800 MHz 4000 MHz
Power (Max TDP) 108 watts 63 watts
Bandwidth 76800 MB/sec 64000 MB/sec
Texel Rate 34000 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 13600 Mpixels/sec 6400 Mpixels/sec
Unified Shaders 800(160x5) 480
Texture Mapping Units 40 24
Render Output Units 16 8
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 1040 million 715 million
Bus PCIe 2.1 x16 PCIe 2.1 x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 3.2 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of data (measured in MB per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 once 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 processed per second. This is worked out by multiplying the total number of texture units by the core clock 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 applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.


2 Responses to “Radeon HD 5770 vs Radeon HD 6670 (OEM) 1GB”
[Want to Buy] Graphics Card - HD5770 / HD4850 - Digit Technology Discussion Forum says:

[...] Would be looking for 5770 only @katikoli: Thanks for the suggestion, but have a look at this: Radeon HD 5770 vs Radeon HD 6670 (OEM) 1GB – Performance Comparison Benchmarks @ Hardware Comp... Again, I think I will have to pass HD4850. Now I am looking for HD5770 only. I am open for [...]

can the FPS be fake?? says:

[...] . some games requires more core of processors. that might be some factors that slows me down. . Radeon HD 5770 vs Radeon HD 6670 (OEM) 1GB – Performance Comparison Benchmarks @ Hardware Comp... and 6770 is almost a match for 5770. . just the series defference. . . Radeon HD 5770 vs [...]

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