We just looked at i7 memory scaling performance and now it is time to chill a few processors to see what those DDR3-2000+ kits are capable of for the serious overclocker. As it turns out that was the opening to our original article, which we planned to launch in conjunction with the DDR3 memory-scaling article.

However, the best plans of mice and men sometimes go awry. Unfortunately, we met delay after delay as every one of our Elpida “Hyper” based kits failed on us in some form or fashion over the past few weeks. At times, a single module would fail and eventually the whole kit in certain instances. Eventually our patience wore thin as even warranty replacements started failing and we knew this was not an isolated problem.

In fact, this problem has become widespread in the extreme overclocking community. Admittedly, widespread in this particular group means a few hundred users. Nevertheless, this audience purchases these extreme memory kits with prices tags reaching the $500+ level at times and expects like performance and quality in return. Certainly, the performance is there, quality we are not so sure about right now.

We could attribute the demise of our modules to the elevated voltage levels we have used for this article and normally we would go that direction and stop for the day. However, we had modules die on us using no more 1.50V VDimm and stock VTT settings in a variety of boards. We are not the only ones, as it seems a number of users have also been through the RMA process (a few more than once) regardless of voltage settings.

The “official” cause of death is unknown at present, while the usual suspects, such as manufacturing errors, motherboard voltage/ user over voltage issues and temperature related deterioration are the obvious perpetrators. The “unofficial” cause of death is simply a quality problem with the Elpida “Hyper” based ICs according to various sources we have spoken with the past couple of weeks. Granted, the other factors can and probably do account for a certain failure rate, but the randomness of our failures along with others, especially at first POST or during stock benchmarking lead us to believe that the quality of the IC is the primary factor at this point.

We have contacted Elpida about the problem but do not have an “official” response from their engineering group yet. However, the problem is serious enough that Corsair informed us earlier today that they asked their retailers to return any kits in the channel. They will not be selling kits based on the Elpida Hyper ICs until an enhanced manufacturing and testing process is in place to ensure the quality of this particular product before shipment. We applaud Corsair for being aggressive in regards to this problem and we expect/hope other suppliers to follow suit.

Most of the suppliers have reported that a relatively small percentage of kits appear to be affected. Just how small is unknown. Based on our own numbers and those of other users it appears to us it is significantly more serious than we were lead to believe a few weeks ago. We are now at the point of just saying that you are better off avoiding Elpida Hyper kits due to the ‘frequently random’ level of failures with modules. However, at least for now, all of the suppliers are fully backing their warranties. If you need the available benchmarking performance generated by these kits then it is worth the risk. Just make sure of the warranty terms before purchase, or simply put, buyer beware.

When we speak of failures, there are two types, a catastrophic failure where the module dies instantly and one of deterioration. One or more of the modules failing to map fully to the operating system usually marks the first sign of deterioration. Moving the modules around between the slots can work around some of this, although from our experience this is a primary sign that things are beginning to go downhill fast. This phenomenon is not to be confused with the i7 memory controller skipping to map a module because of insufficient voltages for the applied clocks.

The next step is when the module no longer clocks up at stock voltages or given voltage limits like 1.65V VDimm. We have witnessed modules not clocking above 1900MHz or so regardless of voltages and slowly dropping to 1200MHz before total failure.

With all that said, we decided to complete the article as there are users out there that have not experienced any of the issues at all or those still wishing to take a chance on these kits. Two of the kits we have been pushing for raw bandwidth over the past few weeks are Corsair’s Dominator GT 7-8-7-20 6GB kit and OCZ’s Blade 2133 8-9-8-24 6GB kit. We have tested other kits, but these are the last two standing in the labs although both of them are now showing signs of deterioration.

Corsair chose to stick with the tried and tested 2000MHz CAS 7-8-7-20 formula while OCZ gives up the tighter CAS rating in a bid to woo the market with a 2133MHz kit at 8-9-8-24 timings. On the face of it, we would say that both kits should be capable of similar results assuming that SPD and PCB differences between the two are not massive. OCZ and Corsair tell us their respective top end kits represent the top 1% of the Elpida Hyper yield.

We’re keeping it simple today, running a few of the preferred benchmarking programs in a bid to find maximum frequency limits for the modules along with a small comparison of scores at the same CPU frequency. We have already shown that these kits are not really needed by the general enthusiast and typically do not improve application performance significantly enough to warrant the increased cost. However, they do provide a certain degree of flexibility when overclocking and allow for very tight latencies at a variety of memory speeds.

Test Setup
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  • justniz - Wednesday, July 22, 2009 - link

    DONT BUY CORSAIR PRODUCTS.

    Their warranty is a scam and their customer support is insultingly useless.

    I RMA'd $680 worth of memory that was advertised as fully covered with a lifetime waranty. Now they refuse to offer anything other than $90 worth of much lower performing memory. Basically I paid for a Ferrari under lifetime warranty and they will only offer a Daewoo as a replacement.

    All emails to Corsair are either ignored or take days for a response which is mostly just an automated or canned reply that contains no information and is of no actual help. Their customer phone support takes ages to get through, then you speak to someone who hardly speaks English, is technically clueless, and has no authority to make any actual decisions.

    Their phone and email system is designed to completely prevent you from getting to anyone that is actually empowered enough to help you.

    Worst experience ever. I will never buy any Corsair products again.
    My only recourse against them is to share my experience with you, the world, so that you won't make the same mistake I did.

    DONT BUY CORSAIR PRODUCTS.
    Reply
  • BlackDragon24 - Thursday, July 09, 2009 - link

    I'm really glad you took the time to write this article Raja. I went thru two of the top end OCZ blade elpida kits in three days. First kit fried in the first hyperpi32M run only running 1.60 vdimm and 1600 memory speed. Second kit failed after three days while running only 1800mhz with 1.63 vdimm. Third set seems to be running like a champ so far (about 3 months), but I am afraid it won't last long.

    Luckily OCZ was a champ about the whole thing and took care of me very quickly. I would expect as much with $450 memory.

    Hopefully if these fail they'll have a comparable replacement part.
    Reply
  • bobsmith1492 - Wednesday, July 08, 2009 - link

    I would recommend graphing the test results vs. CAS value and clock speed in a 3D graph where CAS is one axis, clock speed is the other axis, and the vertical axis is the test results. That could be a good visual aid to the first block of numbers of test results.

    Other combinations, like processor clock and RAM clock might help also - of course the non-graphed variables would have to remain constant.
    Reply
  • mataichi - Wednesday, July 08, 2009 - link

    I bought some Kingston HyperX T1, and they crapped out after a few weeks. I RMA'd them with Kingston and they said it would be about a month before they had any more in stock.
    Luckily they offered to refund the purchase price, so I took it.
    Reply
  • kitfit1 - Wednesday, July 08, 2009 - link

    Once all the others come into line and "pull" their Elpida as well, the question then is, will they replace ALL the Elpida ram in the wild.
    As no one knows if they have suspect ram (until it dies), the ram company's should do a re-call in the same way that car company's have to do. Then they can replace it with whatever comes after Elpida.
    Reply
  • navilor - Wednesday, July 08, 2009 - link

    According to Corsair:
    http://forum.corsair.com/forums/showthread.php?t=7...">http://forum.corsair.com/forums/showthread.php?t=7...

    We have seen a number of reports across various forums about failures of modules (from Corsair as well as from other memory manufacturers) built with Elpida “Hyper” RAMs. Through lab testing, we have now been able to reproduce similar failures. We are continuing to test to determine the cause of these failures. Note that although a relatively small percentage of “Hyper” ICs appear to be affected, the rate of failure is not acceptable to Corsair or to our customers.

    Due to these failures, we will no longer sell Hyper-based modules until the issue can be resolved. We have also have asked our retailers to return any modules they currently have on their shelves. Products impacted include TW3X4G1600C6GTF, TR3X6G1866C7GTF, TR3X6G2000C8GTF, TR3X3G2000C7GTF, and TR3X6G2000C7GTF. We are working on enhancing our manufacturing and testing process to be able to offer these parts again as soon as possible.

    We continue to stand behind these modules 100% with our standard warranty, which can be found at http://www.corsair.com/warranty/default.aspx">http://www.corsair.com/warranty/default.aspx.
    Reply
  • Rajinder Gill - Wednesday, July 08, 2009 - link

    I think most automobile recalls are due to safety issues more than anything else. We can hope that if there is no such recall here, that the lifetime warranty that OCZ and Corsair offer on these modules will be honored should they happen to fail for users in the future.

    regards
    Raja
    Reply
  • JonnyDough - Wednesday, July 08, 2009 - link

    The price/performance of these modules is so ludicrous that I find myself not even caring...

    Give me half a year and I'll leave your OC'd $5K+ system in the dust for half the price.
    Reply
  • vol7ron - Wednesday, July 08, 2009 - link

    That's because you're not one of the enthusiasts the article was written for. In 6 months, you will not leave a $5K system in the dust for only $2.5K. That's guaranteed.

    Now, if you meant that you could beat a $5K 2009-07-08 system in 2010-01-08 with $2.5K, then that's not really saying anything. In fact, I'm not sure 6 months is enough time these days that it would go down 1/2 price, I would imagine it'd be about 3/4 price in that time and probably a year to turn around; mainly because the bubble for performance enhancement is about to burst.

    Even to say if your statement was true, you could do the same today with half the price of a system 6 mo. prior.

    I guess I'm writing so much about this because I have a problem with your statement in general; especially considering the facts made and context of the article, which you're arguably not the target audience for.
    Reply
  • Dreamwalker - Wednesday, July 08, 2009 - link

    Just read at guru3d.com

    http://www.guru3d.com/news/corsair-pulls-dominator...">http://www.guru3d.com/news/corsair-pulls-dominator...
    Reply

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