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Radeon HD 6850 vs Radeon HD 7770


Intro

The Radeon HD 6850 uses a 40 nm design. AMD has set the core frequency at 775 MHz. The GDDR5 RAM works at a frequency of 1000 MHz on this particular model. It features 960 SPUs as well as 48 TAUs and 32 ROPs.

Compare all of that to the Radeon HD 7770, which has core clock speeds of 1000 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 memory. It features 640 SPUs as well as 40 TAUs and 16 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 7770 3180 points
Radeon HD 6850 2395 points
Difference: 785 (33%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770 80 Watts
Radeon HD 6850 127 Watts
Difference: 47 Watts (59%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6850 should in theory be quite a bit better than the Radeon HD 7770 overall. (explain)

Radeon HD 6850 128000 MB/sec
Radeon HD 7770 72000 MB/sec
Difference: 56000 (78%)

Texel Rate

The Radeon HD 7770 should be a small bit (about 8%) better at anisotropic filtering than the Radeon HD 6850. (explain)

Radeon HD 7770 40000 Mtexels/sec
Radeon HD 6850 37200 Mtexels/sec
Difference: 2800 (8%)

Pixel Rate

The Radeon HD 6850 should be a lot (approximately 55%) better at anti-aliasing than the Radeon HD 7770, and able to handle higher resolutions better. (explain)

Radeon HD 6850 24800 Mpixels/sec
Radeon HD 7770 16000 Mpixels/sec
Difference: 8800 (55%)

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 6850

Amazon.com

Radeon HD 7770

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 6850 Radeon HD 7770
Manufacturer AMD AMD
Year October 2010 February 2012
Code Name Barts Pro Cape Verde XT
Memory 1024 MB 1024 MB
Core Speed 775 MHz 1000 MHz
Memory Speed 4000 MHz 4500 MHz
Power (Max TDP) 127 watts 80 watts
Bandwidth 128000 MB/sec 72000 MB/sec
Texel Rate 37200 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 24800 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 960 640
Texture Mapping Units 48 40
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 1700 million 1500 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 max amount of data (counted in MB per second) that can be transported across the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, 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 texture map elements (texels) that can be processed per 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 higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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Radeon HD 6850

Amazon.com

Radeon HD 7770

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

9 Responses to “Radeon HD 6850 vs Radeon HD 7770”
Which is better HD6850 or HD 7770 says:

[...] PC My PC Specs Monitor: View Sonic 27inch LED CPU: Core i7 2600K Cooler: Cooler Master H50 Motherboard: Msi P67-AGD 65 B3 Memory: G.Skills 4GB GPU: MSI GTX 560Ti Hawk O.C HDD: W.D Cavier Black 1TB (INTEL 40GB SSD) Chassis: Haf X 942 PSU: TT 800W (ThermalTake) Soundcard: Creative Xifi-Titanium Fitality Pro OS: Windows 7 64-BIT My Achievements Total Achievements: 1 This one is help you a lot. Radeon HD 6850 vs Radeon HD 7770 – Performance Comparison Benchmarks @ Hardware Compare [...]

graphics card power consumption - Hardware Canucks says:

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AMD prepara nuevas Radeon HD 7750 900MHz y Radeon HD 7770 1.1GHz says:

[...] mismo renombrado y cambiado el hdmi a 1.4a en vez hdmi 1.3 Ahora pongo la 6850 frente a la 7770 Radeon HD 6850 vs Radeon HD 7770 – Performance Comparison Benchmarks @ Hardware Compare Perdona pero decir que una 7770 es un reemplazo de la 5770 o 6770 es un insulto a nuestra [...]

Graphics Card Around 7k - Digit Technology Discussion Forum says:

[...] Posted by CarlonSamuels Got some extra cash i am going with the HD 7770 !!!!!!! Radeon HD 6850 vs Radeon HD 7770 – Performance Comparison Benchmarks @ Hardware Compare Check this out !!!! HD7770 (128 bit) beats the HD6850 (256 bit) only in power consumption. But [...]

MSI 6850 Availability query. - Digit Technology Discussion Forum says:

[...] or MSI 7770. Your expert advice on which to choose, topgear? Or should I make a new thread? Radeon HD 6850 vs Radeon HD 7770 – Performance Comparison Benchmarks @ Hardware Compare Performance wise HD6850(256 bit) is always better than HD7770(128 bit), although HD7770 with its [...]

More gpu insight says:

[...] More gpu insight >Saphire Radeon HD 6850 Radeon HD 7770 Radeon HD 6850 The differences between them $20 difference with the 6850 being better than the 7770. If you can spring for it, go for the [...]

Best graphic card under 10k says:

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Consiglio scheda Video da non spendere esageratamente per GAMING says:

[...] VGA..comunque ti assicuro che sia una 6850 che una 6870....gliele suonano di brutto ad una 7770... Radeon HD 6850 vs Radeon HD 7770 – Performance Comparison Benchmarks @ Hardware Compare Radeon HD 6870 vs Radeon HD 7770 – Performance Comparison Benchmarks @ Hardware Compare per [...]

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