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Radeon HD 5770 vs Radeon HD 6770


Intro

The Radeon HD 5770 uses a 40 nm design. AMD has clocked the core speed at 850 MHz. The GDDR5 memory is set to run at a speed of 1200 MHz on this particular model. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 ROPs.

Compare all that to the Radeon HD 6770, which makes use of a 40 nm design. AMD has set the core speed at 900 MHz. The GDDR5 RAM is set to run at a frequency of 1050 MHz on this particular card. It features 800 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

As far as performance goes, the Radeon HD 5770 should theoretically be a small bit better than the Radeon HD 6770 overall. (explain)

Radeon HD 5770 76800 MB/sec
Radeon HD 6770 67200 MB/sec
Difference: 9600 (14%)

Texel Rate

The Radeon HD 6770 should be a little bit (more or less 6%) better at anisotropic filtering than the Radeon HD 5770. (explain)

Radeon HD 6770 36000 Mtexels/sec
Radeon HD 5770 34000 Mtexels/sec
Difference: 2000 (6%)

Pixel Rate

The Radeon HD 6770 should be a little bit (approximately 6%) more effective at AA than the Radeon HD 5770, and also will be able to handle higher resolutions better. (explain)

Radeon HD 6770 14400 Mpixels/sec
Radeon HD 5770 13600 Mpixels/sec
Difference: 800 (6%)

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 6770

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 6770
Manufacturer AMD AMD
Year October 13, 2009 January 2011
Code Name Juniper XT Juniper XT
Memory 1024 MB 512 MB
Core Speed 850 MHz 900 MHz
Memory Speed 4800 MHz 4200 MHz
Power (Max TDP) 108 watts 108 watts
Bandwidth 76800 MB/sec 67200 MB/sec
Texel Rate 34000 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 13600 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 800(160x5) 800
Texture Mapping Units 40 40
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 1040 million 1040 million
Bus PCIe 2.1 x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 3.2 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster 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 are processed per second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 5770

Amazon.com

Radeon HD 6770

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.

Comments

3 Responses to “Radeon HD 5770 vs Radeon HD 6770”
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فروش کارت گرافیک HD 5770 HIS ICQ5 - صفحه 2 says:

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فروش گرافیک 5770 برند HIS says:

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