AMD Radeon HD 6850 Overclocking Roundup: Asus, XFX, & MSI
by Ryan Smith on November 8, 2010 12:40 AM ESTMeet The XFX Radeon HD 6850
Kicking of our look at 6850s is XFX’s Radeon HD 6850 (HD-685X-ZNFC), a card we’ve had since the 6850 launch two weeks ago and provided to us by XFX to allow us to test 6850 CrossFire performance.
In terms of design the XFX 6850 only bears little resemblance to the reference 6850. The PCB runs half an inch shorter than the reference 6850, measuring 8.5”, while among other differences the XFX 6850 has a second unused set of pads for a second 6pin PCIe power socket. Unfortunately the PCIe power socket is still rear facing, meaning while the card is shorter than the reference 6850, you need to factor in space needed for a PCIe power cable. Meanwhile in terms of build quality the card is fairly normal for a mainstream video card; along with the usual solid capacitors, XFX is also using solid state ferrite core chokes here.
Attached to the top of the card is a completely custom cooler. As is common with cards in this price range and performance level, XFX has ditched the 5850/6850 blower for a more open design that features a center-mounted fan that blows air out the front and the rear of the card. These open designs are both cooler and quieter as air doesn’t need to be forced through several inches of heatsink & shrouding, at a cost of relying more on a case’s cooling abilities. XFX is using a partially shrouded design in order to keep hot air from blowing out of the bottom of the card & towards the motherboard, along with providing some structural stability to the card.
Interestingly, XFX is using a vapor chamber cooler here, which is uncommon for cards at this price range. As you may recall, vapor chambers are effectively flattened heatpipes that sit between a GPU and heatsink, and offer better cooling than a simple solid-metal heatsink base. We’ve never been able to get a solid idea on pricing, but it’s our belief that vapor chamber coolers end up costing more to build than similar heatpipe coolers, which makes the inclusion of a vapor chamber on a sub-$200 card an unusual choice. In any case, the vapor chamber is then attached to a fairly typical circular aluminum heatsink, with fins running up to the top of the card and the fan embedded in the middle. As we’ll see in our test results, the cooling design on the XFX 6850 keeps the card exceptionally cool, but XFX has turned the card for cooling performance at the cost of noise.
Cross-Sectional Diagram Of XFX's Cooler
For the port configuration, XFX has deviated from AMD’s new Eyefinity port configuration in place of the older 5800-series port configuration. This means along with the two DVI ports and the HDMI port there’s only one full-size DisplayPort, versus the two mini-DP ports that AMD has been pushing for these cards. This is a DP 1.2 port, so the XFX 6850 can still drive up to 3 monitors from it, but the card will be unable to drive 6 monitors (instead being limited to 5) as it lacks the necessary outputs.
As far as packed-in items are concerned, as the 6850 is a mainstream card you won’t find any significant included with the card. XFX includes the usual collection of a quick start guide, warranty guide, and driver CD along with a XFX-banded doorknob hanger. However you won’t find any dongles, cables, or power adapters here – in fact XFX doesn’t even officially support using a 2x Molex to 6pin PCIe power adapter.
Finally, XFX is providing their standard double lifetime warranty for the card; 2 years if unregistered with the double lifetime warranty taking effect if the card is registered. Not surprisingly this along with XFX’s design choices have pushed the price of the card up a bit, with the XFX 6850 available for around $190, $10 over the AMD baseline MSRP.
Facebook
Twitter
RSS
93 Comments
View All Comments
tech6 - Monday, November 8, 2010 - link
Please don't feed the troll.haplo602 - Monday, November 8, 2010 - link
on the test setup page:Video Cards: AMD Radeon HD 6870
AMD Radeon HD 6850
AMD Radeon HD 5870
AMD Radeon HD 5850
AMD Radeon HD 5770
AMD Radeon HD 4870
NVIDIA GeForce GTX 480
NVIDIA GeForce GTX 470
NVIDIA GeForce GTX 460 1GB
NVIDIA GeForce GTX 460 768MB
>>>>>>>>>>>>>>> NVIDIA GeForce GTS 450 <<<<<<<<<<<<<<<
NVIDIA GeForce GTX 285
NVIDIA GeForce GTX 260 Core 216
XFX Radeon HD 6850
MSI R6850 OC
Asus EAH6850
However the card is nowhere in the graphs. Yet 5770 is there .... I was actualy interested in that comparison. thanks for the good work.
Ryan Smith - Monday, November 8, 2010 - link
I actually don't have the GTS 450 on the new test suite. We'll be updating Bench this next week, at which point it'll show up.Marburg U - Monday, November 8, 2010 - link
http://img838.imageshack.us/i/gpu46068706850ocstud...DoktorSleepless - Monday, November 8, 2010 - link
I would actually love to see the GTX 460 FTW in these charts because 850 mhz is a typical OC you can get from any regular GTX 460. The 460 and the 6850 are direct competitors so having both their overclock results side by side would be nice.kmmatney - Monday, November 8, 2010 - link
I have a HD4890, which is a power hog, yet I can run it at near silence, fully overclocked, with an Accelero S1 Rev 2 and a whisper fan. Too bad they don't offer a card with this sort of cooler pre-installed - then it would be possible to overclock these cards and still keep a quiet system. I wonder if this cooler will fit on these new cards? The cooler worked great onteh HD4890, but I did have to buy an extra heatsink for the VRMs (and had to hacksaw that to make it fit).Pantsu - Monday, November 8, 2010 - link
Can't the XFX cooler be adjusted with a tool like Afterburner? I mean that would solve the noise issue afaik. But if it's stuck that way there's no reason to buy it.casteve - Monday, November 8, 2010 - link
+1. Why not use Afterburner to remove some of the variables and see how the tested coolers stack up db vs temp?Oxford Guy - Sunday, November 14, 2010 - link
Yes.El_Capitan - Monday, November 8, 2010 - link
Newegg's Lowest prices (11/8/2010):HD 5870 1GB.................$299.99 (plus $2.99 shipping)
GTX 470 1.28GB............$249.99 (free shipping)
HD 6870 1GB.................$239.99 (plus $7.56 shipping)
HD 5850 1GB.................$239.99 (free shipping)
GTX 460 1GB..................$189.99 (plus $3.99 shipping)
HD 6850 1GB.................$179.99 (plus $7.56 shipping)
GTX 460 768MB.............$159.99 (free shipping)
GTS 450 1GB .................$109.99 (free shipping)
Just comparing the above, there's really two competitive ranges:
The $239.99 to $249.99 price range which includes the GTX 470 1.28GB, the HD 6870 1GB, and the HD 5850 1GB.
The $179.99 - $189.99 price range which includes the GTX 460 1GB, and the HD 6850 1GB.
How, if we're going by OVERCLOCKED comparisons for a SINGLE card, especially at the highest two resolutions (1920 x 1200 and 2560 x 1600):
1. The GTX 470 1.28GB overclocked definitely edges out both the overclocked HD 6870 1GB and HD 5850 in performance, while the HD 6870 1GB would be my pick over the HD 5850 1GB, both being the same price.
2. The GTX 460 1GB and the HD 6850 1GB are both great cards. However, seeing the Max Overclock for the HD 6850 with a Max Overclocked Voltage at 1.22v being 960MHz, and a Max Overclock witnessed for the GTX 460 1GB with a Max Overclocked Voltage at 1.087v being 1015MHz (most are in the 880MHz - 950MHz range), the GTX 460 1GB has a greater potential of overclocking ability than the HD 6850. Given that a GTX 460 1GB overclocked slightly betters that of a GTX 470 1.28GB at stock, the winner is obviously the GTX 460 1GB.
Please include the GTX 460 1GB overclocks when comparing overclocks with the HD 6850. Most of us are mature and smart enough to make our own decisions based upon test results, rather than guesswork. Those that are biased one way or another are going to believe what they want no matter what. All that we really losing out on, is our confidence that the site that's doing the review is behaving the same way. If we don't see it here, we're just going to go see it somewhere else.