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Radeon HD 5770 vs Radeon HD 6950

Intro

The Radeon HD 5770 features core clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

Compare that to the Radeon HD 6950, which has GPU core speed of 800 MHz, and 1024 MB of GDDR5 memory running at 1250 MHz through a 256-bit bus. It also features 1408 Stream Processors, 88 TAUs, and 32 ROPs.

(No game benchmarks for this combination yet.)

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

In theory, the Radeon HD 6950 should be 108% faster than the Radeon HD 5770 in general, due to its higher data rate. (explain)

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

Texel Rate

The Radeon HD 6950 is a lot (more or less 107%) better at 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 much (more or less 88%) faster with regards to FSAA than the Radeon HD 5770, and will be able to handle higher resolutions while still performing well. (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

Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.

Radeon HD 5770

Amazon.com

Other US-based stores

Radeon HD 6950

Amazon.com

Other US-based stores

Specifications

Model Radeon HD 5770 Radeon HD 6950
Manufacturer ATi ATi
Year October 13, 2009 December 2010
Code Name Juniper XT Cayman Pro
Fab Process 40 nm 40 nm
Bus PCIe 2.1 x16 PCIe 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) 1250 MHz (5000 MHz effective)
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
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 3.2 OpenGL 4.1
Power (Max TDP) 108 watts 200 watts
Shader Model 5.0 5.0
Bandwidth 76800 MB/sec 160000 MB/sec
Texel Rate 34000 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 13600 Mpixels/sec 25600 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of information (counted in megabytes per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 amount of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 maximum amount of pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

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[...] 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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