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KHX2000C8D3T1K3/6GX - Elpida MGH-E Hyper + Core i7 980X

This is a discussion on KHX2000C8D3T1K3/6GX - Elpida MGH-E Hyper + Core i7 980X within the DDR3 Intel Memory forums, part of the Intel memory category; By GenAn Any of those kits should do since they all use Elpida Hyper chips, though the Corsair GT 2000 ...

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Old 27-05-2010, 02:44 PM   #33 (permalink)
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By GenAn View Post
Any of those kits should do since they all use Elpida Hyper chips, though the Corsair GT 2000 CL7 will probably allow for the tightest timings at the higher clocks with the least amount of VDIMM. The 980x is a bit more lax about the Uncore/DRAM ratio so 2200 7-7-7 might not be possible with a 920.
Hi thanks for the quick and informative response.

Yes VDIMM was another one of my concerns. I would think it would be better to buy a kit that uses less VDIMM for 2000+/-MHz. From what I can see it seems as if Kingston HyperX T1 needs the most.

Also another thing I forgot to mention was the ICs. According to a lot of reviews I have seen the Elpida Hypers are having a lot of problems. I have looked at reviews of the three above mentioned kits and the kit with the least negative reviews ( pertaining to failing Hyper chips ) was the Kingston HyperX T1. Could this be possible due to the lack of people buying Kingston memory, therefore lessening the chances of reported failures? Or are any of the three better than the other?

I have a decent understanding of this stuff so if the internals are mainly the same then overall there should not be much of a difference between the kits. However any opinions are always welcome and much appreciated. Thanks.
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Old 27-05-2010, 11:13 PM   #34 (permalink)
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Hi spoolindsm127 and welcome

As GenAn stated i7 980X loosens the uncore to mem frequency ratio from 2x to 1.5x so you can potentially push memory a bit more before you hit a uncore frequency ceiling see this thread http://i4memory.com/f55/intel-core-i...-ratios-23430/

By spoolindsm127 View Post
Hi everybody,

My name is Ali and I am new to the forums. This is my first post so I apologize if I break any rules.

I just wanted to say to eva2000 that those overclocks really are astonishing, very well done! I'm not nearly as knowledgable as some people on this forum but I know that 7-7-7-21 at nearly 2200MHz is downright amazing. I'm new to the i7 world but still this seems to me like a great achievement, congrats!

I have recently acquired a i7 920 and am very excited to be moving to the x58 platform. I have been doing a lot of research and luckily found a very good OCing batch i7 off ebay. Now my concern is with memory and honestly can use some help.

I am interested in buying memory that is capable of running 2000+Mhz at very low tmings. I have narrowed it down to either the Corsair Dominator GT 2000MHz ( Either CL8 or CL7 ), Kingston HyperX T1 2000MHz ( CL8 ), or Mushkin Redline 998750 2000MHz 8-8-7-24. Anyone have any personal experience that they can share?

Once again if I am taking this thread off topic I apolgize but I figured this would be a good way to introduce myself. Regardless of my questions I know I will find an answer. I honestly though did want to congratulate eva2000 for his success with the Kingston memory

Thanks
By spoolindsm127 View Post
Hi thanks for the quick and informative response.

Yes VDIMM was another one of my concerns. I would think it would be better to buy a kit that uses less VDIMM for 2000+/-MHz. From what I can see it seems as if Kingston HyperX T1 needs the most.

Also another thing I forgot to mention was the ICs. According to a lot of reviews I have seen the Elpida Hypers are having a lot of problems. I have looked at reviews of the three above mentioned kits and the kit with the least negative reviews ( pertaining to failing Hyper chips ) was the Kingston HyperX T1. Could this be possible due to the lack of people buying Kingston memory, therefore lessening the chances of reported failures? Or are any of the three better than the other?

I have a decent understanding of this stuff so if the internals are mainly the same then overall there should not be much of a difference between the kits. However any opinions are always welcome and much appreciated. Thanks.
There's 2x Kingston 2000mhz 8-8-8-24 elpida SKUs, the older original KHX16000D3ULT1K3/6GX which unfortunately were majority from the bad batches of Elpida 50nm MNH-E Hypers ICs and the newer SKU - KHX2000C8D3T1K3/6GX with better improved reliability Elpida 50nm MGH-E Hyper ICs, both do tight 2000mhz timings, the MGH-E seems more likely to do 7-7-7-x compared to MNH-E which do 7-8-7-x. It's probably the older bad SKU giving a bad rep for Kingston 2000C8. But it's too early to tell if the newer SKU is better or not, but seen less folks reports issues with them so far.

But as stated in this thread both SKUs are end of line discontinued now replaced with Kingston 2000mhz cas9 part - KHX2000C9AD3T1K3/6GX which apparently users less performing non-50nm Elpida BDBG ICs see 6GB Kingston HyperX KHX2000C9AD3T1K3/6GX Elpida BDBG Testing

And I believe Mushkin's newer kits don't use Elpida Hypers, so you won't get as tight timings on that kit.

That leaves with with Corsair Dominator GT 2000C7 7-8-7-20 SKU as the other option for 100% Elpida Hypers, although there's also Patriot 2000mhz CAS8 and Super Talent 2000/2200 CAS8 kits which use Elpida Hypers. Patriot uses very old Elpida MNH-E hypers so could be risky as the weeks reported in GenAn's thread below so week 10-11, 2009 = 910 or 911 which is within range of the bad batch period (no confirmation from any manufacturer as to which weeks batches were bad unfortunately).

Not sure what Super Talent 2000/2200 CAS8 Elpida Hyper ics used - I have a few kits I'll test later but not prying off heatsinks heh.

6GB Patriot Viper II PV236G2000LLKB Elpida MNH-E Hyper

http://i4memory.com/f83/super-talent...2000-c8-23675/
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Old 28-05-2010, 12:10 AM   #35 (permalink)
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Not sure what Super Talent 2000/2200 CAS8 Elpida Hyper ics used - I have a few kits I'll test later but not prying off heatsinks heh.
I asked Super Talent if they were MGH-E and the reply I got was "yes" but we need visual confirmation! Heat em up with a blow dryer and pull em!
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Old 28-05-2010, 12:16 AM   #36 (permalink)
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Patriot uses very old Elpida MNH-E hypers so could be risky as the weeks reported in GenAn's thread below so week 10-11, 2009 = 910 or 911 which is within range of the bad batch period (no confirmation from any manufacturer as to which weeks batches were bad unfortunately).
I found a pic of some MGH-E that is 09110 used in G.Skill Perfect Storm:



I wonder if the MNH-E from the same period is just "pre" MGH-E, chips that were "fixed" but came out just prior to Elpida changing the code.
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Old 28-05-2010, 12:26 AM   #37 (permalink)
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Not sure wish there was more publicly accessible info as to how manufacturers date/produce these ICs heh.

But as always one thing folks overlook is that power supply quality also effects memory clocks on core i3/i5/i7 memory controllers - well that's what some of the LN2 benchers are saying.
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Old 28-05-2010, 04:02 AM   #38 (permalink)
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6GB Kingston 2000CAS8 KHX2000C8D3T1K3/6GX scaling tests, when I reduced the Uncore frequency multiplier from 24x to 23x - I reduced the Uncore frequency from 4128Mhz to 4071Mhz. I knew I'd get a potentially higher max memory clock at 8-8-8-24 1T timings, but was surprised by how much extra. I managed to jump from DDR3-2064Mhz to DDR3-2124Mhz at the same voltages of 1.45v CPU VTT and 1.66v VDIMM all thanks to Core i7 980X's lower minimum Uncore to Memory ratio requirements!

6GB Kingston 2000CAS8 KHX2000C8D3T1K3/6GX
@DDR3-2124Mhz 8-8-8-24 1T at 1.66v
  • 23x 177bclk = 4071Mhz cpu frequency
  • 23x 177bclk = 4071Mhz Uncore frequency (cpuz reports it as NB frequency)
  • 18x 177bclk = 3186Mhz QPI frequency
  • 12x 177bclk = DDR3-2124Mhz memory frequency



6GB Kingston 2000CAS8 KHX2000C8D3T1K3/6GX
@DDR3-2230Mhz 8-8-8-24 1T at 1.66v


Managing to use TurboV to push bclk incrementally until I reached DDR3-2230Mhz 8-8-8-24 1T at 1.45v CPU VTT and 1.66v VDIMM !
  • 23x 186bclk = 4275Mhz cpu frequency
  • 23x 186bclk = 4275Mhz Uncore frequency (cpuz reports it as NB frequency)
  • 18x 186bclk = 3345Mhz QPI frequency
  • 12x 186bclk = DDR3-2230Mhz memory frequency



System:
  • Intel Core i7 980X 3951A763 B1 Step 2 ES
  • EK Supreme LT H20 + TFC480 + MCP655
  • Asus P6T6 WS Revolution 0609 beta bios
  • Sapphire HD5970 OC Edition 10.4 Official Catalyst Drivers
  • 6GB Kingston 2000C8 (KHX2000C8D3T1K3/6GX)
  • 750GB Samsung SATAII OS
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Old 28-05-2010, 08:18 AM   #39 (permalink)
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Hi spoolindsm127 and welcome

As GenAn stated i7 980X loosens the uncore to mem frequency ratio from 2x to 1.5x so you can potentially push memory a bit more before you hit a uncore frequency ceiling see this thread http://i4memory.com/f55/intel-core-i...-ratios-23430/





There's 2x Kingston 2000mhz 8-8-8-24 elpida SKUs, the older original KHX16000D3ULT1K3/6GX which unfortunately were majority from the bad batches of Elpida 50nm MNH-E Hypers ICs and the newer SKU - KHX2000C8D3T1K3/6GX with better improved reliability Elpida 50nm MGH-E Hyper ICs, both do tight 2000mhz timings, the MGH-E seems more likely to do 7-7-7-x compared to MNH-E which do 7-8-7-x. It's probably the older bad SKU giving a bad rep for Kingston 2000C8. But it's too early to tell if the newer SKU is better or not, but seen less folks reports issues with them so far.

But as stated in this thread both SKUs are end of line discontinued now replaced with Kingston 2000mhz cas9 part - KHX2000C9AD3T1K3/6GX which apparently users less performing non-50nm Elpida BDBG ICs see 6GB Kingston HyperX KHX2000C9AD3T1K3/6GX Elpida BDBG Testing

And I believe Mushkin's newer kits don't use Elpida Hypers, so you won't get as tight timings on that kit.

That leaves with with Corsair Dominator GT 2000C7 7-8-7-20 SKU as the other option for 100% Elpida Hypers, although there's also Patriot 2000mhz CAS8 and Super Talent 2000/2200 CAS8 kits which use Elpida Hypers. Patriot uses very old Elpida MNH-E hypers so could be risky as the weeks reported in GenAn's thread below so week 10-11, 2009 = 910 or 911 which is within range of the bad batch period (no confirmation from any manufacturer as to which weeks batches were bad unfortunately).

Not sure what Super Talent 2000/2200 CAS8 Elpida Hyper ics used - I have a few kits I'll test later but not prying off heatsinks heh.

6GB Patriot Viper II PV236G2000LLKB Elpida MNH-E Hyper

http://i4memory.com/f83/super-talent...2000-c8-23675/
Thanks eva2000, I am glad I joined this forum. I will take a look at that link to better my understanding of uncore to mem ratios. Also thanks for your replies and GenAn also.

I have been following this thread along with several others on this forum and have gathered sufficient information regarding the Elpida Hyper ICs. Basically if I see a manufacturer selling 2000MHz memory rated at CL8 or lower, I 99% expect them to be using Hypers.

That brings me to your suggestions Eva2000 about the Patriot and Super Talent modules. You are right about the Kingston 2000C8, it is EOL and hard to find. There is an Australian seller who has a few kits on ebay, but he's asking nearly $300 USD for them. This actually isn't a bad price, and seeing how they have worked beautifully for you was making me lean towards buying those. But I assume there is no real difference between brands correct? As long as they are Hyper MGH-Es I should be good yes?

And about whether or not the Super Talents have MGH-E or not is also something I need to know and would like to share with everyone. I wish someone can give a definitive answer because actually I see there are several Super Talent 2000MHz 8-8-8-24 kits on sale for $221 or so on ebay. If Super Talents use MGH-E then this is a steal for this kit! And for all those people looking to find some hypers may be in luck. It's one of those sellers that has multiple account names but is actually the same person or business. I'm ready to order some any minute.

Also Eva2000, weren't you running that 2000C8 at 7-7-7-21 at around 2200MHz? But was that at a higher voltage, and the results your most recently posted are for a lower VDIMM? Just curious but regardless congrats with the success
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Old 28-05-2010, 08:21 AM   #40 (permalink)
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Also I contacted Mushkin and although they can't disclose information regarding their memory ICs he basically confirmed their 998750 2000MHz 8-8-7-24 kits are MGH-Es.

So I just need to know if the ICs are the only thing that matters then I will search for the cheapest kit using MGH-E. Of course though customer support always matters too.
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