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Radeon HD 6970 vs Radeon HD 7850

Intro

The Radeon HD 6970 makes use of a 40 nm design. AMD has set the core frequency at 880 MHz. The GDDR5 RAM is set to run at a speed of 1375 MHz on this particular model. It features 1536 SPUs as well as 96 TAUs and 32 Rasterization Operator Units.

Compare those specs to the Radeon HD 7850, which makes use of a 28 nm design. AMD has set the core frequency at 860 MHz. The GDDR5 RAM works at a frequency of 1200 MHz on this specific card. It features 1024 SPUs along with 64 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850 130 Watts
Radeon HD 6970 250 Watts
Difference: 120 Watts (92%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6970 should be 15% faster than the Radeon HD 7850 in general, because of its higher bandwidth. (explain)

Radeon HD 6970 176000 MB/sec
Radeon HD 7850 153600 MB/sec
Difference: 22400 (15%)

Texel Rate

The Radeon HD 6970 should be much (more or less 53%) more effective at anisotropic filtering than the Radeon HD 7850. (explain)

Radeon HD 6970 84480 Mtexels/sec
Radeon HD 7850 55040 Mtexels/sec
Difference: 29440 (53%)

Pixel Rate

The Radeon HD 6970 is a small bit (more or less 2%) faster with regards to AA than the Radeon HD 7850, and also capable of handling higher resolutions while still performing well. (explain)

Radeon HD 6970 28160 Mpixels/sec
Radeon HD 7850 27520 Mpixels/sec
Difference: 640 (2%)

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 6970

Amazon.com

Radeon HD 7850

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 6970 Radeon HD 7850
Manufacturer AMD AMD
Year December 2010 March 2012
Code Name Cayman XT Pitcairn Pro
Memory 2048 MB 2048 MB
Core Speed 880 MHz 860 MHz
Memory Speed 5500 MHz 4800 MHz
Power (Max TDP) 250 watts 130 watts
Bandwidth 176000 MB/sec 153600 MB/sec
Texel Rate 84480 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 28160 Mpixels/sec 27520 Mpixels/sec
Unified Shaders 1536 1024
Texture Mapping Units 96 64
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 2640 million 2800 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, 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 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 number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka 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, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Comments

One Response to “Radeon HD 6970 vs Radeon HD 7850”
Anonymous says:

[...] viel von der Leistung her, lediglich braucht die 7850 weniger Strom und hat den neueren Chip. Radeon HD 6970 vs Radeon HD 7850 – Performance Comparison Benchmarks @ Hardware Compare Verkaufe GW2 Acc mit Lvl80 Guardian & 5G (gold/orange equippt) Hardware: Bitfenix Prodigy [...]

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