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Written by Olin Coles   
Thursday, 21 October 2010
Table of Contents: Page Index
AMD Radeon HD 6850 Barts Video Card
Radeon HD 6850 Closer Look
Features and Specifications
Video Card Testing Methodology
DX10: 3DMark Vantage
DX10: Crysis Warhead
DX11: Aliens vs Predator
DX11: Battlefield Bad Company 2
DX11: BattleForge
DX9 SSAO: Mafia II
DX11: Metro 2033
DX11: Unigine Heaven 2.1
Overclocking and Temperatures
VGA Power Consumption
Radeon HD 6850 Conclusion

Radeon Features

  • Microsoft DirectX 11 Support
  • AMD Eyefinity Technology
  • AMD Accelerated Parallel Processing (APP) Technology Designed for DirectCompute 5.0 and OpenCL
  • Accelerate Video Transcoding
  • 40 nm Process Technology
  • Advanced GDDR5 Memory Technology
  • 3rd Generation TeraScale Engine
  • Microsoft Windows 7 Support
  • AMD CrossFireX Technology
  • Enhanced Anisotropic Filtering
  • Accelerated Video Transcoding
  • Display Flexibility, Supports DL-DVI, DP, HDMI and D-Sub
  • HDMI 1.4a support with Deep Color and 7.1 High Bitrate Audio
  • On chip HDCP Support
  • AMD CrossFireX multi-GPU support for highly scalable performance. (Use up to four discrete cards with an AMD 790FX based motherboard)
  • AMD Avivo HD Support
    • ATI Unified Video Decoder 3 (UVD3) for 3D Blu-ray and HD Video.
    • Accelerated Video Transcoding (AVT)
    • DVD Upscaling
    • Dynamic Contrast
    • Built-in HDMI with 7.1 surround sound support
    • Dynamic power management with ATI PowerPlay technology including memory clocks
    • Dolby TrueHD and DTSHD Master Audio Support

AMD Barts GPU Details

  • ATI Radeon HD 6850 has a size of 336 sq.mm, perf/sq.mm = 22.0
  • AMD Radeon HD 6870 has a size of 255 sq.mm, perf/sq.mm = 30.3

6850/6870 Specifications

Reference Design Attribute Radeon HD 5850 Radeon HD 5870 Radeon HD 6850 Radeon HD 6870

Process

40nm

40nm

40nm

40nm

Transistors

2.15B

2.15B

1.7B 1.7B

Engine Clock

725 MHz

850 MHz

775 MHz 900 MHz

Stream Processors

1440

1600

960 1120

Compute Performance

2.09 TFLOPS

2.72 TFLOPs

1.50 TFLOPs 2.00 TFLOPs

Texture Units

72

80

48 56

Texture Fillrate

52.2 GTexels/s

68.0 GTexel/s

37.2 GTexel/s 50.4 GTexel/s

ROPs

32

32

32 32

Pixel Fillrate

23.2 Gpixel/s

27.2 GPixel/s

24.8 GPixel/s

28.8 GPixel/s

Z/Stencil

92.8 GSamples/s

108.8 GSamples/s

99.2 GSamples/s 128.0 GSamples/s

Memory Type

GDDR5

GDDR5

GDDR5

GDDR5

Memory Clock

1000 MHz

1200 MHz

1000 MHz

1050 MHz

Memory Data Rate

4.0 Gbps

4.8 Gbps

4.0 Gbps

4.2 Gbps

Memory Bandwidth

128.0 GB/s

153.6 GB/s

128.0 GB/s

134.4 GB/s

Maximum Board Power

170W

188W

127W 151W

Idle Board Power

27W

27W

19W 19W



 

Comments 

 
# Why 7.25 on the value?sweatshopking 2010-10-22 03:50
this card produces frames at a lower cost than anything else you tested, based on your own scores. Why do you rate it a 7.25 on the value front?
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# RE: Why 7.25 on the value?Olin Coles 2010-10-22 07:04
True, the cost per frame value was quite nice, but there were several factors I considered for the value rating and you've got to keep in mind that it's a subjective score. I didn't like that fan noise was slightly louder than the 6870, and the price seemed just a little higher than I think it should be. Again, it's only my rating, and you can ignore it if you feel differently about the cards' price.
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# Mr.Mete Can Karahasan 2010-10-23 16:59
At 16x10 resolution, Hd 6850 is actually producing 56.1 fps in the BF2:BC benchmark, better than gtx 460. A typo there, my guess.
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# Typo fixedOlin Coles 2010-10-23 17:33
Fixed! Thank you for pointing that out.
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# 5830David 2010-10-25 06:30
well I wish I'd read this before I bought a 5830. not really sure where the 5830 would have placed in this test, but I assume it would be just below the 6850. my options at the site I purchased it were 5770 $139, 5830 $179, or 6850 $199. my motherboard doesn't have pcie 2.1 on 2.0 but I'm not sure if that would influence my choices.
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# typoDavid 2010-10-25 06:31
2.1 on 2.0 should read 2.1 only 2.0
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# 5830 wasn't greatsweatshopking 2010-10-25 07:02
the 5830 would come in quite a bit below the 6850, and with much higher tdp, and noise. It was a lackluster part, and that was one of the reasons for the refresh. that being said, it's still better than my 4850, so enjoy it!
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# RE: 5830Olin Coles 2010-10-25 07:14
I've actually got several results tested on the 5830, but didn't include them because this model is being phased out. I'll update the article with what I've got.
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# RE: 5830David 2010-10-25 08:05
so my next question is how will my system likely perform. I'm upgrading from a 8800GT OC to a 6850 reference card on a P43 ICH10 MB a E8400 cpu with 4GB of Dual Channel DDR2 1066 Ram and a 3gbs Sata HD, onto a 1680 x 1050 22" LCD via DVI
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# finesweatshopking 2010-10-25 08:51
should be able to play pretty much anything on high, at that resolution.
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# RE: RE: 5830Olin Coles 2010-10-25 10:23
At that resolution, it should nearly match the 1680x1050 results I produced in this review.
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# RE: RE: RE: 5830David 2010-10-25 10:46
Thanks :D thats great news!
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# rmaDavid 2010-10-25 07:35
called NE they informed me that the order shipped but i can refuse delivery or rma the whole box unopened for a full refund. so I reordered everything with a 6850 :D
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# RE: rmaOlin Coles 2010-10-25 07:37
That's good news. I've updated the test summary sections with 5830 performance results.
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# RE: RE: rmaDavid 2010-10-25 07:45
thanks, looks like it's $20 well spent to go from the 5830 to the 6850. besides the FPS increase, I will also get a overall better quality controlled product with a couple of extras that I probably won't use LOL.
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# RE: RE: RE: rmaDavid 2010-10-25 07:49
hmm well did have to give up a free copy of Call of Duty: Modern Warfare 2. sigh. I doubt I would of played it much though
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# Updated performance chartsOlin Coles 2010-10-25 16:23
You'll all be pleased to know that I've updated this article with new performance charts that compare the Radeon HD 5830 and 5770.
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# EVGApero 2010-11-12 23:09
How can the EVGA GTX460 be so much better than a normal one?
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# Massive OverclockBruceBruce 2010-11-12 23:34
It's overclocked by the factory from 675 MHz to 850 MHz, giving it a pretty substantial (25% +) kick compared to stock cards.
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# RE: Massive Overclockpero 2010-11-13 14:39
Is it physically different too? If a consumer overclocked a non-overclocked GTX460, would the results be the same?
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# RE: RE: Massive OverclockOlin Coles 2010-11-13 15:49
Nope, it's just been overclocked. The results would be the same for any GTX 460 overclocked to those speeds.
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# RE: EVGAOlin Coles 2010-11-13 08:49
Please see the Test Methodology section for specifications, but the reason it's better is because of a strong factory overclock.
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# Will it work with my mobo?Ethan 2011-11-24 20:22
Hi. My motherboard has a pci 2.0 slot, not 2.1. will this card work?

Im currently running an amd msi r5770 hawk.
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# RE: AMD Radeon HD 6850 Barts Video CardEthan 2011-11-24 20:29
also, how much power does it need to run crossfire?
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# RE: RE: AMD Radeon HD 6850 Barts Video CardOlin Coles 2011-11-24 21:06
It will work just fine with PCI-E 2.0, and since each card uses 140W expect to use 280W in CrossFire.
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# RE: RE: AMD Radeon HD 6850 Barts Video CardEthan 2011-11-24 23:28
I have a 750 watt power supply. A 1 terrabite segate 7200 rpm hdd 8 gigs of ddr3 1333 Corsair Dominator ram, and an x fi titanium sound card. do you think that there would be enough power to run cf or should i check and see how much power each thing takes individually?

Thank you very much for the response
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# RE: RE: RE: AMD Radeon HD 6850 Barts Video CardOlin Coles 2011-11-25 08:34
Your 750W PSU will be more than enough for CrossFire on that system.
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