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Written by Hank Tolman   
Friday, 04 November 2011
Table of Contents: Page Index
VisionTek Radeon HD 6850 Video Card
Closer Look: VisionTek 6850
Features and Specifications
Video Card Testing Methodology
DX10: 3DMark Vantage
DX9 SSAO: Mafia II
DX11: Aliens vs. Predator
DX11: Battlefield: Bad Company 2
DX11: DiRT-2 Demo
DX11: Lost Planet 2
DX11: Unigine Heaven 2.5
MSI R6870 Hawk Temperatures and Overclocking

VisionTek Radeon HD 6850 Temperatures

It's hard to know exactly when the first video card got overclocked, and by whom. What we do know is that it's hard to imagine a computer enthusiast or gamer today that doesn't overclock their hardware. Of course, not every video card has the head room. Some products run so hot that they can't suffer any higher temperatures than they generate straight from the factory. This is why we measure the operating temperature of the video card products we test.

Before stressing the video card to its extremes, I want to get a good baseline for how the card runs at idle. I use GPU-Z to measure the temperature reported by the GPU to get this number. After that's taken care of I want to really stress the card. I use FurMark to do this. It is important to remember that, with FurMark, we will get temperature and power consumption numbers that are probably far above anything a game could produce. I run FurMark at full blast on the stress settings with everything turned all the way for 20 minutes before checking the temps. At the same time, the idle temps were taken after sitting at the desktop for 20 min after a cool start up. While checking the temperatures of the card, the ambient room temperature remained stable at 22C. I use an open-air test bench for testing, so air restriction is not a problem.


Despite the changes in fan placement and the lower clock speeds of the Radeon HD 6850, the VisionTek Radeon HD 6850 touts temperatures almost exactly the same as the VisionTek 6870.


Fan Speed

GPU Temperature








100% - Manual


When overclocked, the GPU temperatures raise slightly, but considering the performance upgrade that the overclock provides, it's worth it. With only a single fan on the VisionTek 6850, even when cranked up to 100%, it wasn't very noisy. If I concentrated, I could hear it, but it wasn't loud. With the fan on auto, I didn't hear a thing.


Fan Speed

GPU Temperature








100% - Manual



Since Afterburner got its upgrade, overclocking has become a lot less limited. Since the Radeon HD 6850 is so close in nature to the HD 6870, it has a lot of overclock potential. To overclock the VisionTek Radeon HD 6850, I used the Afterburner program from MSI.

I increased the auxiliary voltage and memory voltage for the VisionTek Radeon HD 6850 using Afterburner by the maximum available values. For the GPU core voltage I slowly increased until I reached a value of 920. I haven't had much luck with any card operating above this. In the end, I was able to achieve excellent results with the overclocking. The VisionTek Radeon HD 6850 reached a GPU core clock speed of 1000MHz, up from the stock 775MHz it came with. That is the exact same speed I reached with the MSI 6870 Hawk. That constitutes an increase of almost 30%. With the memory, I was able to achieve stability at 1150MHz, up from 1000MHz. That increase is about 15%.

The excellent overclocking that we achieved with the VisionTek Radeon HD 6850 made it pretty equal to a Radeon HD 6870 at overclocked speeds. It also made it very comparable to the much more expensive GTX 570 in many cases. Realize that these results are not typical and each piece of hardware is different.



3DMark Vantage: Nash



3DMark Vantage: Calico



Mafia II



Alien vs. Predator



Battlefield: Bad Company 2



Dirt 2



Lost Planet 2








# RE: VisionTek Radeon HD 6850 Video Cardkzinti1 2011-11-08 23:36
Why did you say that this card "Looks pretty dull"? I think it's a quite good looking videocard. It's a lot nicer looking than all the cards with mostly naked pictures of alien women glued all over them. It also looks better than my EVGA GTX 590 which has nothing but "EVGA GTX 590 Classified" written on it and a completely black background. It does have the Nvidia logo and "GeForce" on the side lit up with l.e.d.'s, which really does make it look classy in a subdued manner. Sort of like a nice tuxedo compared to the cheap clown suits as most videocards appear. This Visiontek HD 6850 looks good and expensive, not cheap and gawdy.
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# RE: RE: VisionTek Radeon HD 6850 Video CardComputer Ed 2011-11-10 03:53
I have to agree and ask why this is worthy of a ding on the card. I mean seriously swho spends time looking at their video card, I put it in and use it and then do not care what it looks like.
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# AppearancesHank Tolman 2011-11-10 07:56
Thanks for the responses!

I can appreciate your opinions. Personally, I think it looks pretty dull, but definitely not cheap or gawdy. I have a clear side on my case, and I prefer flashy components.

I just imagined myself walking down the isles of a store and passing right by this card, especially because the box is very plain. It doesn't catch my eye. The card itself is better, but it's still pretty plain. The pictures make it look like the fan might have LEDs, but it doesn't.

Anyway, that's my opinion.

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# RE: RE: VisionTek Radeon HD 6850 Video CardRiley 2011-11-10 12:29
i think the fact that it doesn't have the half naked girls and ogres and dragons actually makes this box stand out from the rest of them on the shelf don't you think? I saw a white version of this box at BestBuy and it stood out to my eyes. great review by the way
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# Lol!Hank Tolman 2011-11-11 05:39
You make a good point!

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# RE: VisionTek Radeon HD 6850 Video Cardmnc2fan 2011-11-09 22:52
"along with an installion CD.."

Bit of a typo.
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