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Radeon HD 7850 vs Radeon HD 7970


Intro

The Radeon HD 7850 uses a 28 nm design. AMD has set the core frequency at 860 MHz. The GDDR5 memory runs at a frequency of 1200 MHz on this card. It features 1024 SPUs along with 64 Texture Address Units and 32 Rasterization Operator Units.

Compare those specs to the Radeon HD 7970, which uses a 28 nm design. AMD has clocked the core frequency at 925 MHz. The GDDR5 memory is set to run at a frequency of 1375 MHz on this specific card. It features 2048 SPUs as well as 128 TAUs and 32 Rasterization Operator Units.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 7970 8225 points
Radeon HD 7850 5200 points
Difference: 3025 (58%)

Ethereum Mining Hash Rate

Radeon HD 7970 21 Mh/s
Radeon HD 7850 13 Mh/s
Difference: 8 (62%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850 130 Watts
Radeon HD 7970 250 Watts
Difference: 120 Watts (92%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7970 should perform much faster than the Radeon HD 7850 overall. (explain)

Radeon HD 7970 264000 MB/sec
Radeon HD 7850 153600 MB/sec
Difference: 110400 (72%)

Texel Rate

The Radeon HD 7970 is a lot (more or less 115%) more effective at anisotropic filtering than the Radeon HD 7850. (explain)

Radeon HD 7970 118400 Mtexels/sec
Radeon HD 7850 55040 Mtexels/sec
Difference: 63360 (115%)

Pixel Rate

The Radeon HD 7970 is a little bit (more or less 8%) better at full screen anti-aliasing than the Radeon HD 7850, and also should be able to handle higher resolutions while still performing well. (explain)

Radeon HD 7970 29600 Mpixels/sec
Radeon HD 7850 27520 Mpixels/sec
Difference: 2080 (8%)

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 7850

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 7850 Radeon HD 7970
Manufacturer AMD AMD
Year March 2012 January 2012
Code Name Pitcairn Pro Tahiti XT
Memory 2048 MB 3072 MB
Core Speed 860 MHz 925 MHz
Memory Speed 4800 MHz 5500 MHz
Power (Max TDP) 130 watts 250 watts
Bandwidth 153600 MB/sec 264000 MB/sec
Texel Rate 55040 Mtexels/sec 118400 Mtexels/sec
Pixel Rate 27520 Mpixels/sec 29600 Mpixels/sec
Unified Shaders 1024 2048
Texture Mapping Units 64 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 384-bit
Fab Process 28 nm 28 nm
Transistors 2800 million 4313 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 11.1
OpenGL Version OpenGL 4.2 OpenGL 4.2

Memory Bandwidth: Bandwidth is the largest amount of data (counted in megabytes per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the bus width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 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 anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is worked out 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 processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 7850

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 7850 vs Radeon HD 7970”
arnold says:

para la diferencia que tiene me quedo con la 7850 aparte para masturbarme no importa la vga jajaja a cagarce a pajas amigos

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