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Radeon HD 5870 vs Radeon HD 7970


Intro

The Radeon HD 5870 features core speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 RAM. It features 1600(320x5) SPUs as well as 80 TAUs and 32 ROPs.

Compare those specs to the Radeon HD 7970, which comes with GPU clock speed of 925 MHz, and 3072 MB of GDDR5 memory running at 1375 MHz through a 384-bit bus. It also is made up of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5870 188 Watts
Radeon HD 7970 250 Watts
Difference: 62 Watts (33%)

Memory Bandwidth

The Radeon HD 7970 should in theory be quite a bit faster than the Radeon HD 5870 in general. (explain)

Radeon HD 7970 264000 MB/sec
Radeon HD 5870 153600 MB/sec
Difference: 110400 (72%)

Texel Rate

The Radeon HD 7970 will be quite a bit (about 74%) faster with regards to AF than the Radeon HD 5870. (explain)

Radeon HD 7970 118400 Mtexels/sec
Radeon HD 5870 68000 Mtexels/sec
Difference: 50400 (74%)

Pixel Rate

The Radeon HD 7970 is a little bit (more or less 9%) more effective at anti-aliasing than the Radeon HD 5870, and will be able to handle higher screen resolutions more effectively. (explain)

Radeon HD 7970 29600 Mpixels/sec
Radeon HD 5870 27200 Mpixels/sec
Difference: 2400 (9%)

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 5870

Amazon.com

Radeon HD 7970

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 5870 Radeon HD 7970
Manufacturer AMD AMD
Year September 23, 2009 January 2012
Code Name Cypress XT Tahiti XT
Memory 1024 MB 3072 MB
Core Speed 850 MHz 925 MHz
Memory Speed 4800 MHz 5500 MHz
Power (Max TDP) 188 watts 250 watts
Bandwidth 153600 MB/sec 264000 MB/sec
Texel Rate 68000 Mtexels/sec 118400 Mtexels/sec
Pixel Rate 27200 Mpixels/sec 29600 Mpixels/sec
Unified Shaders 1600(320x5) 2048
Texture Mapping Units 80 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 384-bit
Fab Process 40 nm 28 nm
Transistors 2154 million 4313 million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 3.2 OpenGL 4.2

Memory Bandwidth: Bandwidth is the max amount of information (in units of megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount 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 of the card by the core speed of the chip. The better this number, the better the graphics card will be at handling 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 the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core 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 5870

Amazon.com

Radeon HD 7970

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 5870 vs Radeon HD 7970”
PC Zusammnstellung, was meint ihr? says:

[...] ist ja schnell genug, aber wenns am Geld nicht fehlt hol dir die 7970. Kannst ja mal hier gucken, Radeon HD 5870 vs Radeon HD 7970 – Performance Comparison Benchmarks @ Hardware Compare Zitieren + Antworten Gehe zu: Komplette Rechner: Zusammenstellung [...]

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