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Radeon HD 5770 vs Radeon HD 6950

Intro

The Radeon HD 5770 uses a 40 nm design. AMD has clocked the core speed at 850 MHz. The GDDR5 RAM works at a speed of 1200 MHz on this particular card. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Compare those specs to the Radeon HD 6950, which uses a 40 nm design. AMD has set the core speed at 800 MHz. The GDDR5 RAM is set to run at a speed of 1250 MHz on this particular card. It features 1408 SPUs as well as 88 TAUs and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770 108 Watts
Radeon HD 6950 200 Watts
Difference: 92 Watts (85%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6950 is 108% faster than the Radeon HD 5770 in general, because of its higher bandwidth. (explain)

Radeon HD 6950 160000 MB/sec
Radeon HD 5770 76800 MB/sec
Difference: 83200 (108%)

Texel Rate

The Radeon HD 6950 will be much (about 107%) better at texture filtering than the Radeon HD 5770. (explain)

Radeon HD 6950 70400 Mtexels/sec
Radeon HD 5770 34000 Mtexels/sec
Difference: 36400 (107%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 6950 is the winner, by far. (explain)

Radeon HD 6950 25600 Mpixels/sec
Radeon HD 5770 13600 Mpixels/sec
Difference: 12000 (88%)

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

Check prices at:

Radeon HD 6950

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 5770 Radeon HD 6950
Manufacturer AMD AMD
Year October 13, 2009 December 2010
Code Name Juniper XT Cayman Pro
Memory 1024 MB 1024 MB
Core Speed 850 MHz 800 MHz
Memory Speed 4800 MHz 5000 MHz
Power (Max TDP) 108 watts 200 watts
Bandwidth 76800 MB/sec 160000 MB/sec
Texel Rate 34000 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 13600 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 800(160x5) 1408
Texture Mapping Units 40 88
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 1040 million 2640 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 largest amount of information (measured in MB per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 number of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 5770

Amazon.com

Check prices at:

Radeon HD 6950

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.

Comments

One Response to “Radeon HD 5770 vs Radeon HD 6950”
[video card]Looking to Upgrade, thoughts? by SyNtHeTiC - TribalWar Forums says:

[...] a cool site you can use to compare cards My upgrade: Radeon HD 5770 vs Radeon HD 6950 ***8211; Performance Comparison Benchmarks @ Hardware Compare [...]

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