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

Intro

The Radeon HD 5770 has a GPU core 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 is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Compare that to the Radeon HD 6670 (OEM) 1GB, which features core speeds of 800 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 480 SPUs as well as 24 Texture Address Units and 8 ROPs.

(No game benchmarks for this combination yet.)

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 a bit faster than 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 much (approximately 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

The Radeon HD 5770 is quite a bit (about 113%) more effective at AA than the Radeon HD 6670 (OEM) 1GB, and also capable of handling higher resolutions better. (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

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

Model Radeon HD 5770 Radeon HD 6670 (OEM) 1GB
Manufacturer AMD AMD
Year October 13, 2009 February 2011
Code Name Juniper XT Turks
Fab Process 40 nm 40 nm
Bus PCIe 2.1 x16 PCIe 2.1 x16
Memory 1024 MB 1024 MB
Core Speed 850 MHz 800 MHz
Shader Speed N/A MHz (N/A) MHz
Memory Speed 1200 MHz (4800 MHz effective) 1000 MHz (4000 MHz effective)
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
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 3.2 OpenGL 4.1
Power (Max TDP) 108 watts 63 watts
Shader Model 5.0 5.0
Bandwidth 76800 MB/sec 64000 MB/sec
Texel Rate 34000 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 13600 Mpixels/sec 6400 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported across the external memory interface within a second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 amount of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. 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 rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Comments

2 Responses to “Radeon HD 5770 vs Radeon HD 6670 (OEM) 1GB”
[...] 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 [...]
[...] . 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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