Initial Overclocking Results

We are working on a comprehensive overclocking guide for the i7/X58 platform to fully explain each BIOS setting as well as providing an easy to follow set of instructions to get the most out of this new platform. In the meantime, we are showing our initial overclocking results with air-cooling and the i920. To be blunt, overclocking the i920 on air to 4GHz is fairly simple: raise Bclk to 191, enable turbo and HT modes, set VCore to 1.4125V, VTT to 1.30V, VDimm to 1.67V, and set your 6GB kit to 9-9-9-24 as a good base start. After that, it is merely a matter of fine tuning the voltages a little and adjusting memory timings for improved performance and/or stability. Of course, all of this depends on the quality of your memory, cooling, and CPU. In our case, even with very good air-cooling, we found the practical limit for VCore to be around 1.425V without incurring throttling under load temperatures. Based on this setting, we arrived at our 21x191 setting. We will take a further look at overclocking on these boards and others with a CoolIT Systems Freezone Elite shortly.

Our overclocking numbers are reached with HT and Turbo settings enabled on a retail CPU. This adds a significant load on the IMC and memory system resulting in the need to run higher voltages than if we turned off HT or Turbo, especially HT. In fact, a 19x211 (ES CPU) setting without HT or Turbo enabled resulted in us lowering VCore from the 1.4125V range to 1.35V and VDimm from an average of 1.67V to 1.64V while retaining like CPU clock speeds and stability. Performance is basically equal, except in applications that take advantage of four or more cores where a slight lead goes to an HT enabled system. Our retail CPU sample is not the best around so our non HT/Turbo enabled voltages and Bclk numbers could be improved with a better unit. In fact, the retail CPU we utilized refused to go over a 205 Bclk so we had to use an ES sample for the 19x211 testing. We have additional CPUs arriving shortly.

All of our boards easily reached 21x191 for a turbo boosted speed of 4010MHz or so. Each board was able to run our Corsair or Mushkin 1600MHz 6GB kits at CAS7 with ASUS offering the best timings at 7-7-7-20 1T, Gigabyte at 7-8-7-24 1T, MSI at 7-8-7-20 1T, and EVGA at 7-8-7-20 1T. Memory performance was very close for each solution considering the Bclk ratio was not exactly at 191 as set in the BIOS. The EVGA board returned a 190.5 setting, MSI at 191.5, ASUS at 190.9, and Gigabyte at 191. Even accounting for the various Bclk speeds, the boards were extremely close in the write, copy, and latency numbers; the exact numbers we think are extremely important for improving system performance with an IMC design, whether from Intel or AMD.

Overall, we think the Gigabyte numbers are the best and for good reason. On each board, we set the basic timings based on extensive stability testing and let each individual board set the balance of the subtimings based on their auto settings. Gigabyte offers an additional memory setting that improves subtimings automatically; there are three different settings: Standard, Turbo,and Extreme. We utilized the Turbo setting without affecting stability. The Standard setting returned results that were slightly lower than the other boards and the Extreme setting was not stable.

This is not to take away from the performance of the other boards. In fact, each successive MSI BIOS has improved memory performance and stability greatly, to the point now that the Eclipse board is able to run with the wolves. ASUS started out with the fastest memory performance, and in our initial testing beyond 4GHz their ability to run tighter timings pays off as you increase Bclk rates. EVGA just provided a BIOS that opens up 24 different subtimings and we could improve memory performance about 3% after a quick session.

Of course, manually tuning each setting certainly results in better performance in certain benchmarks - you know, the ones like SuperPI 32M, AquaMark, or WinRAR. However, you will never notice the difference in daily usage unless you do it wrong and wonder why Excel or Crysis constantly crashes. So, for the majority of users we highly recommend auto settings for the subtimings - and often for the base memory timings as well.

The one knock we have against the Gigabyte board is that VDroop is present even with load line calibration enabled. We had to set our VCore to 1.4250 to 1.4300V to ensure stability after accounting for VDroop; however, the board proved to be stable at a real 1.392V ~ 1.412V. The EVGA board tended to overvolt slightly under load while the MSI and ASUS boards kept VCore stable.

Overclocking to 21x191 with our G.Skill or Patriot 1600MHz kits was like an Indiana Jones adventure. Just when we thought the treasure of stability was in our hands, it would slip away quickly and we had to go through some exciting travels to get it back. To be honest, the ASUS board was the easiest to clock high with 12GB installed. The Gigabyte and EVGA products required a few BIOS revisions before we could overclock properly and we are still fighting with the MSI board. All of the manufacturers stated that they fully support 12GB operation up to DDR3-1333, but after that, the IMC is being pushed beyond its official rating from Intel. However, like the official 1.65V VDimm warning, we basically ignored the official rating and set off to see how high we could go on air-cooling.

Let's get the bad news out of the way first. We could not get the MSI board stable past a 21x175 setting utilizing manual tuning methods. We tried every setting, especially setting tRFC to 74 or higher and starting with 10-10-10-24 timings, but nothing worked. If we set the board to auto settings for voltages and memory, manually set Bclk to 200, and turned on Turbo/HT the board would work; however, VCore was set to 1.48V, VTT to 1.48V, and VDimm to 1.90V. Not bad for a stable 4.1GHz, and considering the relationship between VTT and VDimm, we were within a safe range for not destroying our CPU. However, the VCore level was too much for our air-cooling solution on a 24/7 basis and after a few hours load temps would rise past 90C, throttling would occur, and our system would crash. What we found to be strange was that a 21x191 manual setting, but with all other settings the same as the 21x200 setup, would crash the system after the initial POST sequence. MSI is working on it and we expect a solution shortly.

We were able to run the ASUS board at memory timings of 8-8-8-20 2T compared to 9-8-8-24 1T on the Gigabyte and EVGA boards. Memory performance was nearly identical between each board and once again showed that we could make a choice if required between a lower CAS setting with 2T or a higher CAS setting with 1T enabled without really affecting performance in our application benchmarks. We had to set VCore to 1.425V, VTT to 1.325V, IOH to 1.20V, and VDimm to 1.70V for 24/7 stability on each board. Once again, the Gigabyte board operated fine even though VDroop meant real voltage swung between 1.392V and 1.412V. We could have slightly reduced our VCore settings to 1.4125V on the ASUS and EVGA board but we always had Crysis Warhead lock up on us after the 15th pass out of 25.

Overall, we generally found it was easier to overclock with the ASUS P6T-Deluxe and could easily do it on mostly auto settings. We would recommend this board for those who do not want to get their hands too dirty to reach a reasonable overclock level. The ASUS BIOS is very informative and lists out the min/max and standard settings for the major BIOS options, and a new user interested in overclocking will find this comforting. You can still get down and dirty with the P6T when it comes to tweaking the BIOS for best performance. Based on this we find the ASUS board to have a very balanced design for both types of users.

Except for the informative BIOS settings, the same basically holds true for the EVGA X58 SLI board, and in some ways we liked its simplicity of settings when overclocking. The latest BIOS allows you to tweak further but still not to the absolute degree of the ASUS or Gigabyte boards. Since the V15 BIOS, getting high Bclk with 12GB has been relatively easy and pain free. Also, the BIOS is smart about setting the right auto timings to get the best possible performance while retaining stability. This platform has also proved to be rock stable. Depending on your memory supplier, there might be a need to set tRFC to 74 or higher when clocking high with 12GB installed.

The MSI Eclipse X58 is an interesting board; it has all the makings of a great overclocking platform and yet the BIOS is still a tweak or two away from being really good. The board performed equally to the other offerings with a 3GB or 6GB memory load but buckled underneath the pressure when loaded with 12GB. Based on the progress MSI has made in the past couple of weeks, we expect this problem to be solved shortly. The one item of note when overclocking this board is that a few of the voltage settings in the BIOS are rather cryptic as MSI utilizes a +/- setting for changes. The base voltage information is not always listed so the user has to have prior knowledge of base settings before making an informed decision.

The Gigabyte GA-EX58-UD5 is a tweaker's delight, and based on our initial testing with the latest F4K series BIOS we have no doubt now about the potential capabilities it offers. Gigabyte has come a long a way in improving the overclocking capabilities of this board along with improved performance and stability in a short time. If Gigabyte could match usability features of the ASUS BIOS and improve auto settings, we feel like this board could ultimately offer the best overclocking experience in the mid-range X58 market.

Power Consumption Final Words
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  • belladog - Saturday, December 6, 2008 - link

    Im glad Anandtech is taking a firmer stance with the motherboard makers. I too have seen a degradation in quality over the years.

    I take what review sites say with a grain of salt. People concerned about stabilty should go to the motherboards makers forums(or other user forums) to really see what to expect with a product.

    You dont need to be einstein to realise that manufacturers send hand picked and tweaked products to review sites. Their sales figures depend on a good review, but then the masses who buy the boards/products from the shop see very different results.

    Also its hard to poorly rate a product when reviewers have friendships at the companies or depend on advertising revenue from these same companies.

    Whats the use of high overclocks if you cant get 4 Gigs of ram to work? Or your new PCI-E 2.0 Video card is having "compatibilty" problems with a board advertised to run it? Then they say its your PSU or memory. The PSU maker blames the motherboard, everyone blames each other and us suckers have to go out and buy 2 PSU's, 2 different ram kits and mix and match to get a working system.

    I like to buy high end parts but my experience is its usually not worth it. Most "high end" boards, PSU's , memory are overpriced and provide little or no better experience than a mainstream parts at half the price, except maybe graphics cards where a high priced one will provide a better gaming experience on high settings.

    Even in crossfire/SLI an X38/X48 board running at 16X/16X will perform no better than a mainstream P45 board running at 16X/8X. Even worse in some situations.

    X58 is a little different because its a whole new architecture that looks interesting but really doesnt offer a huge performance gain. We will probably see the socket 1156 boards performing about the same if the past is anything to go by.

    Anyway something needs to change in regards to reviews. Maybe review sites should only test parts obtained from retail channels. Maybe review sites should run a standardised lot of tests before even considering overclocking results. I expect all the advertised features to work correctly as advertised.

    Like i said, the best thing consumers can do is, dont take too much notice of reviews and go to the manufacturers forum or other user forums to see what you're really in for.

  • stungun - Saturday, December 6, 2008 - link

    I love the fact you are trying to implement changes in how you review hardware. Personally I do not overclock, dont want to but i do want the newer Intel processor/motherboard combo for 3d rendering and just because it is time to upgrade I should go with the future. Not all your readers want to burn up cpu components some of us just want a good honest working system.
  • shocku - Saturday, December 6, 2008 - link

    That's it?!
    After promising snippets for weeks, the final article is a compilation of what's been said before. That, and more promises future articles will be more in-depth about: RAM… non ES CPUs… the two or three X58 motherboards not covered here…, etc., etc., etc.

    I appreciate all the work that goes on behind the scenes to make reviews. But at some point you gotta tell it like it is. If a BIOS or driver wasn't ready-- tough luck. There's plenty of room for other companies to shine by getting things right the first time. Or, are sites like Anandtech the new beta testers?

    "We still have several boards to review, ranging from the $220 MSI Platinum up to the $400 Foxconn Bloodrage with several in-between. Our next review will focus on the "lower" end X58 boards from Intel, Gigabyte, Biostar, and MSI. Our final review will feature the upper end boards from ASUS, Gigabyte, DFI, and Foxconn. In between, we will provide a comprehensive OC guide along with a detailed look at memory performance with several DDR3 tri-channel kits from Corsair, OCZ, Patriot, GSkill, Kingston, Crucial, and Mushkin."

    Say it isn’t so. Why did I read this article for?

    I'll try going from the bottom up...
    >I thought the Nehalem memory article was out already. There's that much memory performance left to be covered?
    >How can readers make use of "a comprehensive OC guide" that's coming out before "upper end boards"? There's no point if a few bucks more can get you a board that goes as high as your attempts to OC the cheaper one. Might as well pay more and OC more, or pay less if both have the same ceiling.
    >The next review will be about lower end boards like Intel's?! Huh?! The Smackover retails for over $250 USD. Unless they have a cheaper board nobody knows about, and they're ready to sell it now; there's NO SUCH THING as a low end X58 board this year.

    This article's conclusion, as of 12/05/08, seems impartial and has constructive criticism for the board makers. Perhaps this whole series of articles and blogs will look good to someone reading them for the first time 6 months from now. But, right now, the article is just fodder.

    Are readers better off with an expensive board they know thanks to this article, or should they get an even more expensive board that’s been skipped from this review? Heck, maybe the best is a cheaper one whose price puts it in the so-called ‘low end.’
    These boards are not $1-$5 dollar items. So, say it like you mean it.
    KTHX.
    Or... charge manufacturers for all the beta testing you've done and the many 'second' chances they got before you went public. While you're at it, spare us from dealing with ads in your Web site.

    PS: I wrote this before I read any comments. Boy am I not alone!
  • sidewinderx2 - Saturday, December 6, 2008 - link

    Err... i'm pretty sure i'm just feeding a troll here... but here goes:

    Do you not understand what quotation marks mean? You know... somewhat sarcastic? they specifically put the word "lower" in quotation marks, so unless you truly have no grasp of the english language, you must be retarded to think that they actually meant those boards are "low end" boards.


    "This article's conclusion, as of 12/05/08, seems impartial and has constructive criticism for the board makers. Perhaps this whole series of articles and blogs will look good to someone reading them for the first time 6 months from now. But, right now, the article is just fodder. "

    So... what you're saying is... "WAAAAH! ANANDTECH DIDN'T TELL ME WHAT I SHOULD BUY! WAAAAH! THEY'RE TOO IMPARTIAL! WAAAH! THEY SHOULD BLINDLY GIVE ADVICE OVER THINGS THEY HAVEN'T TESTED YET! WAAAAAAAAH!"

    Right.
  • LtPage1 - Friday, December 5, 2008 - link

    Which companies have better quality control out of the gate is information of EXTREME relevance to the consumer. These boards are close enough together in pricing, features, and performance as makes no difference to me. Which company's board had the least problems when it was shipped to you would absolutely sway my purchase. Also, how quickly they dealt with problems you brought up, and how obsessed they were with overclocking performance results to the exclusion of basic functionality would be a huge factor for me.

    Inform the consumer! Report on hardware? Tell us which companies deserve our money.
  • chekk - Friday, December 5, 2008 - link

    Perhaps you should send the mobo manufacturers a bill for your testing. It sounds like Anandtech provided a very valuable service since clearly the manufacturer's quality assurance processes are not up to the task.
    Yes, overclocking is fun, but if I buy a production board, it had better be production ready. Also, whether the board is $300 or $65, that sucker better work.
    I'd actually like to know which manufacturers we're discussing as I'd like to stop supporting them with my dollars until they get a clue.
  • Ben - Friday, December 5, 2008 - link

    It's hard not to rant here, but I know that rants often get passed over.

    You guys don't know what a relief it was to read this article. I've been building systems for many years and I have noticed the steady decline in quality.

    My latest build was not only the most money I've ever spent on a computer, but also the worst experience I've ever had with a build. I've since sold it off as pieces, while I contemplate buying a preassembled workstation for the first time in my life.

    The final straw for me was when I complained about a broken feature to a well-known manufacturer and they told me that I "should have known" what to expect from their product by reading their message boards. In other words, we know it says it does A, B, and C on the box, but if you read our message boards before you bought our product, then you would have known that it doesn't do A, B, and C.

    I hope you guys can turn this situation around.
  • DBissett - Friday, December 5, 2008 - link

    Anand's essay on this topic is some of the most important writing I've seen here. Unfortunately, the editorial slant of AT reviews, along with many other sites, has set the stage over the years for exactly what the complaint is about. Anand describes it well...the overriding interest, if not outright obsession, with what often amounts to miniscule performance advantages has literally buried the benefits of simple day to day dependability. Now that this situation has reached such extremes that Anand feels compelled to sound off about it, the task is to turn the editorial focus enough to raise dependability to the higher level of concern that it deserves. Some users in the forums point out at times that different settings or product differences make absolutely no difference in real world use. AT reviews should be equally candid and state, perhaps in bold type, when differences in observed speed are insignificant, and then NOT go on to rank order products on these insignificant speed differences. AT reviews should also go on to provide a rating or at least clear observations about the true ease of use, dependability and satisfaction to be expected by users in general or at different levels of experience, including BIOS issues that the manufacturer has not fixed. It sounds like this might be coming. Great! JDPowers ranks cars on something like initial problems/defects found by new buyers and there's no reason why similar polling/experiences shouldn't be provided for users of what are increasingly expensive computer parts. I hope Anand follows up on this issue and really institutes changes to address it.
  • marsrunner - Friday, December 5, 2008 - link

    Thanks for the roundup. Great reading.
    I bought the i7-920, 12GB of G.Skill PC3-1333 RAM and Asus P6T a couple of weeks ago, and have only had one real problem. My new Logitech Illuminated Keyboard causes the mobo to take about 3 minutes to initialize USB devices at POST, and then when it does POST the keyboard won't work at all until Vista takes over. Very irritating. Haven't contacted ASUS, because I'm sure they'd point the finger at Logitech, who would point the finger back at ASUS. Besides, the keyboard does not cause any problems on my other PC.
    I should say that I don't and won't be doing any overclocking, unlike most people around here I imagine, but even so I've noticed a lack of attention to detail in these mobos.
  • Ecmaster76 - Friday, December 5, 2008 - link

    Good article.

    However the feature tables are a rather large download. If you absolutely must post them as an image please use PNG or GIF. I resaved one in both formats and the size dropped in half without a loss in quality. JPEG is excellent where color content is more important than detail. However the indexed color of PNG and GIF is superior for a 2 color text table where the sharpness of the letters and not the exact shades of those two green is most important.

    Also you have a next page link at the bottom of the last page that, of course, goes nowhere.

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