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

Intro

The Radeon HD 5770 features a GPU core clock speed of 850 MHz, and the 1024 MB of GDDR5 memory is set to run at 1200 MHz through a 128-bit bus. It also features 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

Compare those specifications to the Radeon HD 6670 (OEM) 1GB, which uses a 40 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 memory runs at a frequency of 1000 MHz on this specific model. It features 480 SPUs as well as 24 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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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

In theory, the Radeon HD 5770 should be 20% faster than the Radeon HD 6670 (OEM) 1GB overall, due to its greater data rate. (explain)

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

Texel Rate

The Radeon HD 5770 should be much (approximately 77%) more effective at texture 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 lots of anti-aliasing is important to you, then the Radeon HD 5770 is a better choice, by a large margin. (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

Amazon.com

Radeon HD 6670 (OEM) 1GB

Amazon.com

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 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: Bandwidth is the max amount of information (counted in megabytes per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. If the card has DDR memory, it must 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total amount of texture units of the card by the core 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 amount of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Comments

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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