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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 frequency at 850 MHz. The GDDR5 RAM runs at a speed of 1200 MHz on this specific model. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

Compare all that to the Radeon HD 6950, which has a clock frequency of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 256-bit memory bus, and makes use of a 40 nm design. It is made up of 1408 SPUs, 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

Performance-wise, the Radeon HD 6950 should in theory be much superior to the Radeon HD 5770 overall. (explain)

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

Texel Rate

The Radeon HD 6950 is quite a bit (approximately 107%) faster with regards to anisotropic filtering than the Radeon HD 5770. (explain)

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

Pixel Rate

The Radeon HD 6950 is a lot (more or less 88%) faster with regards to anti-aliasing than the Radeon HD 5770, and will be able to handle higher screen resolutions without losing too much performance. (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

Radeon HD 6950

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 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: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If 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, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the clock 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 fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 5770

Amazon.com

Radeon HD 6950

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

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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