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Radeon HD 4870 X2 vs Radeon HD 5870

Intro

The Radeon HD 4870 X2 uses a 55 nm design. ATi has set the core frequency at 750 MHz. The GDDR5 RAM runs at a frequency of 900 MHz on this specific card. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Compare those specs to the Radeon HD 5870, which uses a 40 nm design. ATi has set the core speed at 850 MHz. The GDDR5 memory runs at a frequency of 1200 MHz on this model. It features 1600(320x5) SPUs along with 80 TAUs and 32 Rasterization Operator Units.

Avatar

Settings: Ultra High Quality
AA: 8x
AF: none
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
Radeon HD 4870 X2 64 FPS
Radeon HD 5870 62 FPS
Difference: 2 FPS (3%)

Battlefield Bad Company 2

Settings: High Quality
AA: 4x
AF: 8x
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
Radeon HD 4870 X2 60 FPS
Radeon HD 5870 58 FPS
Difference: 2 FPS (3%)

Left4Dead 2

Settings: Very High
AA: 8x
AF: 16x
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
Radeon HD 4870 X2 134 FPS
Radeon HD 5870 124 FPS
Difference: 10 FPS (8%)

Supreme Commander 2

Settings: High
AA: 8x
AF: 16x
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
Radeon HD 4870 X2 99 FPS
Radeon HD 5870 92 FPS
Difference: 7 FPS (8%)

Radeon HD 4870 X2 wins

(Based entirely on the benchmarks listed above)

When combining all game benchmark scores on this page together, the Radeon HD 4870 X2 wins overall, by 21 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 4870 X2 357 FPS
Radeon HD 5870 336 FPS
Difference: 21 FPS (6%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5870 188 Watts
Radeon HD 4870 X2 350 Watts
Difference: 162 Watts (86%)

Memory Bandwidth

The Radeon HD 4870 X2 should theoretically perform a lot faster than the Radeon HD 5870 overall. (explain)

Radeon HD 4870 X2 230400 MB/sec
Radeon HD 5870 153600 MB/sec
Difference: 76800 (50%)

Texel Rate

The Radeon HD 5870 will be a little bit (about 13%) more effective at AF than the Radeon HD 4870 X2. (explain)

Radeon HD 5870 68000 Mtexels/sec
Radeon HD 4870 X2 60000 Mtexels/sec
Difference: 8000 (13%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 5870 is superior to the Radeon HD 4870 X2, though not by far. (explain)

Radeon HD 5870 27200 Mpixels/sec
Radeon HD 4870 X2 24000 Mpixels/sec
Difference: 3200 (13%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

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 4870 X2

Amazon.com

Other US-based stores

Radeon HD 5870

Amazon.com

Other US-based stores

Specifications

Model Radeon HD 4870 X2 Radeon HD 5870
Manufacturer ATi ATi
Year Aug 12, 2008 September 23, 2009
Code Name R700 Cypress XT
Fab Process 55 nm 40 nm
Bus PCIe 2.0 x16 (PCIe bridge) PCIe 2.1 x16
Memory 1024 MB (x2) 1024 MB
Core Speed 750 MHz (x2) 850 MHz
Shader Speed N/A MHz (x2) (N/A) MHz
Memory Speed 900 MHz (3600 MHz effective) (x2) 1200 MHz (4800 MHz effective)
Unified Shaders 800(160x5) (x2) 1600(320x5)
Texture Mapping Units 40 (x2) 80
Render Output Units 16 (x2) 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 256-bit
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2
Power (Max TDP) 350 watts 188 watts
Shader Model 4.1 5.0
Bandwidth 230400 MB/sec 153600 MB/sec
Texel Rate 60000 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 24000 Mpixels/sec 27200 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of data (measured in megabytes per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total texture units of the card 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 applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated 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 filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Comments

2 Responses to “Radeon HD 4870 X2 vs Radeon HD 5870”
[...] Radeon HD 4870 X2 vs Radeon HD 5870 – Performance Comparison Benchmarks @ Hardware Compare The 4870x2 Power la..... Free ups!! "Working on imperfect system that demands [...]
Adam says:
and what cpu/clock was used in this comparison? looks cpu bottle necked to me...

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