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Radeon HD 5770 vs Radeon HD 5870

Intro

The Radeon HD 5770 makes use of a 40 nm design. AMD has set the core speed at 850 MHz. The GDDR5 memory works at a frequency of 1200 MHz on this particular card. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 ROPs.

Compare those specifications to the Radeon HD 5870, which features a clock frequency of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also features a 256-bit memory bus, and uses a 40 nm design. It is made up of 1600(320x5) SPUs, 80 TAUs, and 32 Raster Operation Units.

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

Theoretically, the Radeon HD 5870 should be quite a bit faster than the Radeon HD 5770 overall. (explain)

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

Texel Rate

The Radeon HD 5870 is much (about 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 will be a lot (more or less 100%) more effective at full screen anti-aliasing than the Radeon HD 5770, and also will be able to handle higher screen resolutions better. (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 maximum amount of data (counted in MB per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster 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 texture map elements (texels) that are processed per second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate 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 drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max 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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