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Radeon HD 5770 vs Radeon HD 5870

Intro

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

Compare those specifications to the Radeon HD 5870, which uses a 40 nm design. AMD has clocked the core speed at 850 MHz. The GDDR5 RAM is set to run at a speed of 1200 MHz on this model. It features 1600(320x5) SPUs as well as 80 TAUs and 32 ROPs.

Avatar

Settings: Ultra High Quality
AA: 8x
AF: none
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
Radeon HD 5870 62 FPS
Radeon HD 5770 37 FPS
Difference: 25 FPS (68%)

Battlefield Bad Company 2

Settings: High Quality
AA: 4x
AF: 8x
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
Radeon HD 5870 58 FPS
Radeon HD 5770 30 FPS
Difference: 28 FPS (93%)

Fallout 3

Settings: Very High Quality
AA: 8x
AF: 16x
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
Radeon HD 5870 85 FPS
Radeon HD 5770 54 FPS
Difference: 31 FPS (57%)

Left4Dead

Settings: Very High Quality
AA: 8x
AF: 16x
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
Radeon HD 5870 119 FPS
Radeon HD 5770 66 FPS
Difference: 53 FPS (80%)

Left4Dead 2

Settings: Very High
AA: 8x
AF: 16x
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
Radeon HD 5870 124 FPS
Radeon HD 5770 70 FPS
Difference: 54 FPS (77%)

Mass Effect 2

Settings: Maximum Quality
AA: none
AF: 8x
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
Radeon HD 5870 150 FPS
Radeon HD 5770 87 FPS
Difference: 63 FPS (72%)

Supreme Commander 2

Settings: High
AA: 8x
AF: 16x
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
Radeon HD 5870 92 FPS
Radeon HD 5770 62 FPS
Difference: 30 FPS (48%)

Tom Clancy's Endwar

Settings: High Quality
AA: 4x
AF: 8x
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
Radeon HD 5870 30 FPS
Radeon HD 5770 28 FPS
Difference: 2 FPS (7%)

Radeon HD 5870 wins

(Based entirely on the benchmarks listed above)

When combining all game benchmark scores on this page together, the Radeon HD 5870 wins overall, by 286 FPS. Please note that we do not have the results of every benchmark ever done for these cards, so the results may differ wildly in different games.

Radeon HD 5870 720 FPS
Radeon HD 5770 434 FPS
Difference: 286 FPS (66%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770 108 Watts
Radeon HD 5870 188 Watts
Difference: 80 Watts (74%)

Memory Bandwidth

Performance-wise, the Radeon HD 5870 should in theory be much superior to the Radeon HD 5770 in general. (explain)

Radeon HD 5870 153600 MB/sec
Radeon HD 5770 76800 MB/sec
Difference: 76800 (100%)

Texel Rate

The Radeon HD 5870 will be a lot (more or less 100%) better at anisotropic filtering than the Radeon HD 5770. (explain)

Radeon HD 5870 68000 Mtexels/sec
Radeon HD 5770 34000 Mtexels/sec
Difference: 34000 (100%)

Pixel Rate

The Radeon HD 5870 should be quite a bit (more or less 100%) better at AA than the Radeon HD 5770, and also capable of handling higher screen resolutions more effectively. (explain)

Radeon HD 5870 27200 Mpixels/sec
Radeon HD 5770 13600 Mpixels/sec
Difference: 13600 (100%)

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 5870

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 5870
Manufacturer AMD AMD
Year October 13, 2009 September 23, 2009
Code Name Juniper XT Cypress XT
Fab Process 40 nm 40 nm
Bus PCIe 2.1 x16 PCIe 2.1 x16
Memory 1024 MB 1024 MB
Core Speed 850 MHz 850 MHz
Shader Speed N/A MHz (N/A) MHz
Memory Speed 1200 MHz (4800 MHz effective) 1200 MHz (4800 MHz effective)
Unified Shaders 800(160x5) 1600(320x5)
Texture Mapping Units 40 80
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 3.2
Power (Max TDP) 108 watts 188 watts
Shader Model 5.0 5.0
Bandwidth 76800 MB/sec 153600 MB/sec
Texel Rate 34000 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 13600 Mpixels/sec 27200 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of data (in units of megabytes per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR 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 clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Comments

One Response to “Radeon HD 5770 vs Radeon HD 5870”
ArgentSouL says:
1billon transistors vs 2,1 billons transistor ,mmmh..

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