AMD Radeon HD 6850 Overclocking Roundup: Asus, XFX, & MSI
by Ryan Smith on November 8, 2010 12:40 AM ESTFinal Thoughts
As this is a two-sided article, there are two things we’d like to touch on: Radeon HD 6850 overclocking in general, and how well the cards in today’s roundup stack up.
We’ll start with 6850 overclocking in general. While we only use a subset of our most performance-hungry games in overclocking testing, it’s clear that 6850 overclocking isn’t going to be a simple case of overclocking the core first, and getting what you can out of the memory second. In fact it looks to be the opposite: the 6850’s big performance pickup from overclocking is due to the memory overclock first, then the core overclock. As a result we’re less concerned with core overclocking (and overvolting) as we are with memory overclocking. Overclocking both is going to be necessary to compete with the 6870 in shader-bound games, but even the memory overclock alone can be quite potent. AMD’s Overdrive limits don’t look so bad in this respect, and based on our 4 cards 850/1150 is probably attainable on most cards.
On this note, it’s interesting that the only card in our roundup with a significant factory overclock, the MSI R6850 OC, had a much bigger memory overclock than a core overclock. We normally don’t put much thought in to how partners choose their overclocks beyond choosing things that bin in large enough numbers, but this certainly grabs our attention. Perhaps MSI has realized the same thing we have?
This brings us to the second half of our article: the 6850 roundup. Balance is usually the key to a good card, and in the mainstream market this is even more important. So among the 3 cards in our roundup it catches us off-guard to see that only 1 of the cards is really balanced: the Asus EAH6850. While the XFX Radeon HD 6850 has excellent cooling, it’s much too aggressive in our tests; lower temperatures don’t do anything on their own, we’re only concerned about them to the point that they’re low enough that we need not be concerned with the lifespan of a card. Meanwhile the MSI R6850 OC is just all-around worse, which while explainable at stock speeds due to its overclock, is hard to explain when we normalize clocks and voltages at 1.172v, 940/1150. There’s always something to be said for the benefits of a factory overclock, but compared to the Asus card it seems like there’s a lot to give up to get there.
And that leaves us with the Asus EAH6850. Asus’s design philosophy is normally what we’d call “aggressive”, as we have seen a number of their cards that trade temperature for noise, similar to the XFX. But this isn’t the case for the EAH6850 – it’s as balanced a card as we could ask for. It does well enough at cooling while approaching whisper-quiet noise levels, and even overclocked it manages to keep the 6850 in check without getting too loud or drawing more power than is necessary. At 9.5” long Asus did have to make some kind of tradeoff, but unless you have an extremely cramped case it’s definitely a reasonable tradeoff. Ignore the ridiculous token overclock, and you have the Radeon HD 6850 that not only stands above all others, but can more than give the GTX 460 1GB a solid kick to the curb.
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Mr Perfect - Monday, November 8, 2010 - link
AT normally tears the cooler off to examine the card, and then dissects the cooler itself too. Neither 6800 article has done this though. It should be an even bigger priority when we're comparing non reference cards that are competing purely on their unique designs. Are these cards on loan? Do they have to be returned in the same condition they where received? If so, I say just ship them back without reviewing them. :PI just came from XBitLabs, where they did a proper teardown of both a stock 6850 and 6870, and that Asus card looks a lot like the stock 6870 board. It has the two top mounted PCIe power connectors, and the VRMs appear to be between the GPU and IO ports. I would not be surprised if it really was a 6870 PCB. Check it out!
khimera2000 - Monday, November 8, 2010 - link
I appreciate the review, it looks alot less of a hot article as the last one, and its clear that a good amount of effert went into this article just by the comments AT left, and the way the article was written.I was also wondering when will the review of the higher end 6xxx card be availabe?
Cali3350 - Monday, November 8, 2010 - link
A lot of Doom and Gloom here about the OC cards. Let me try and tell you, Ryan and Anand, what I think the people want as a majority:1. Never use OC'd cards in a initial review. Ever. You guys, quite frankly, should have known this and the flak you are getting for using it is deserved imo. Nvidia conned you guys into making their cards unfairly better than the competition in the main review article of a major launch and you fell for it. That article will likely get much more readership than any roundup, and is likely to be looked up in higher numbers down the line. You played that one like a PR branch of Nvidia and you made people angry (imo rightly so). Dont ever do this again. Do not review anything but stock clocks in your GTX 580 review tommorow, and dont you dare use a overclocked anything in your upcoming Cayman review either.
2. Always use OC'd cards in your comparisons. This a COMPARISON article of AIB's and the products they are offering. Ofcourse we want to see how a overclocked 460 compares to a overclocked 6850, this is the article where we go over what is out there in the retail market, not what is officially supplied by the creators. This article loses a lot of value without a 460 OC'd in it.
Launch articles = what we are getting from the creators of the product.
Comparison articles = what we are buying in the real world.
I love this site, and I do not think your biased, but I wont defend you over the 68XX review either.
AnandThenMan - Monday, November 8, 2010 - link
I agree with what you are saying here. The problem is, the genie is out of the bottle. Anandtech should not let the 68xx review stand as is, the FTW results should be removed, and all references to it. And if that is not done, then overclocked AMD cards must be included in all future reviews, no exceptions. In fact, Anandtech should accept a hand picked, delivered to their door card from AMD.If neither are done, then I would question all results published here, there is a credibility problem to say the least. You can't start picking and choosing how reviews are done depending on the hardware. That is exactly why policies are in place. Sadly that policy was ignored.
Jamahl - Wednesday, November 10, 2010 - link
This.Ryan Smith and Anand deserve the fallout over this. They brought it on themselves as does any site that shifted their goalposts in the past few weeks.
Dwebtron - Monday, November 8, 2010 - link
I'm super interested in this one, as I'm holding on to mine... but it never appears in the charts?RaptorTek - Monday, November 8, 2010 - link
Its really the immature fanboys that cant handle seeing their company/card lose that make a stink about including the FTW OC cards in the mix. It makes them feel insecure about themselves and their decisions on being a fanboy for which they decided to spend their hard earned money on. When it comes down to it, the more data we have available the better the decisions we can make on what really is the best hardware for the price. Having the FTW 460 1gb in the stock 6850/6870 article was good since it showed what the contending cards possibilities were. Including the FTW 460 1gb in this OC article would of been even more relevant for side by side comparisons. I would hope Anandtech can see that even if some of "the readers" complain about these things, its really for the best in the logical comparison of these cards.
El_Capitan - Monday, November 8, 2010 - link
Indeed. Why would any logical person WANT LESS data?Fanboy: My HD 6850 that I bought for $189.99 is better than a stock GTX 460 1GB you purchased for $239.99, and overclocks higher!
Realist: I bought by GTX 460 1GB for $189.99 and it overclocks to 1015MHz without unlocking the voltage, what are you talking about?
Fanboy: AnandTech doesn't show that, so it's not relevant!
Realist: You're retarded.
Fanboy: You're an Nvidia fanboy!
Realist: I also own a HD 5870 2GB that I bought for $250.
Fanboy: Yeah, right, whatever!
Realist: ...
Fanboy: Stupid fanboys, they think they know everything.
Realist: :Facepalm:
AnandThenMan - Monday, November 8, 2010 - link
You both completely missed the point, and sounded childish and fanboy-ish in the process.jsrivo - Monday, November 8, 2010 - link
From what I've read, the OCed cards are reaching 800-900MHz on average, and claiming that 1015MHz is realistic for most buyers is a bit fanboyish, in my opinion.