Ram speed issues

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Pierre Olivier Vidal

Pierre Olivier Vidal

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I have bought a set of Kingston Hyper-X Beast 32GB 2400MHz (khx24c11t3k4/32x) installed on an Asus Maximus VII Formula with a I7-4790k.

When I put only 16GB I can run XMP with 2400MHz no problem, but when I put the whole 32GB I can only use XMP profile #2 wich goes to 2133MHz altough I have gotten a bluescreen, no idea if it's from the ram ( installed my ram yesterday ) but I'll keep an eye on that. If I try XMP profile #1 for 2400MHz on the 32GB the computer won't boot.

I've been suggested to cranck my DRAM voltage up by 0.05V which would get me from 1.65V to 1.7V, is that safe?
 
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juanrdp

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You have a timing penalty for adding more DIMMs per channel, maybe that could be your problem?, if you get a bluescreen you are already in the edge, increase ram values to found what one works nice for you



Safe?, probably but as allways in overvolting (voltages for that memory are 1,5 and 1,65) it's no 100% safe, lets say 99.9%.

 
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Pierre Olivier Vidal

Pierre Olivier Vidal

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but those ram are designed as a 32GB 2400MHz kit, how could 2133MHz be the limit ( if the bluescreen is because of the ram, could also be some dust, forgot to clean the ports before installing my new ram or I might even have installed incorrectly one of them... it did happen only once, and after about 10 minutes the computer was on, never happened again since yesterday )

Edit : If it's any help, the way the bluescreen occured is that my internet window disapeared (like if minimized) then task bar disapeared but desktop icons still there, then desktop icons disapeared with mouse control all over that time and finally the bluescreen. All that over about 60 - 90 secondes.
 
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juanrdp

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The limit is a combination of Ram speed, CAS timmings and Voltage applied, with lower CAS you will get lower speeds if you want to get stable memories, and with faster speeds you almost allways need higher CAS.

In you memory:
XMP 1 - Frequency 1,200 MHz
XMP 1 - CAS latency 11
XMP 1 - RAS-to-CAS delay 13
XMP 1 - RAS precharge time 13
XMP 1 - Active-to-precharge time 30
XMP 1 - Command Rate 2 T
XMP 1 - Voltage 1.65 V

First of all you could use the 1,65V-1,67V at the XMP profle 2 to see if it's stable, also using XMP profile 1 as template try to increase the values, maybe something like this:

Frequency 1,200 MHz
CAS latency 12
RAS-to-CAS delay 13
RAS precharge time 13
Active-to-precharge time 30
Command Rate 2 T
Voltage 1.67 V

 
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juanrdp

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Probably not, or at least no any noticiable difference

 
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Pierre Olivier Vidal

Pierre Olivier Vidal

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so at this point, since I'm not doing any hardcore gaming and I don't think I'm ever going to OC, would it be better lifespan wise to stay at 2133MHz even tough they're supose to clock at 2400MHz or will it not make any difference since they are designed for 2400MHz?
 
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Tradesman1

Tradesman1

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What CPU, may have a weaker MC, in which case have options to increase DRAM voltage, OC the CPU some or increase the MC (memory controller) voltage. Yes 1.7 is safe, MC voltage is CPUVTT or may be DDRVTT, with your CPU you can try an OC to 4.2 which should suffice
 
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Pierre Olivier Vidal

Pierre Olivier Vidal

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I'm using a i7-4790k @ 4.4GHz (turbo) and the weird thing is with 2 bars I can easely reach 2400MHz, but with 4 bars I can only reach 2200MHz ( I tried one step higher then 2133 and it worked, but 2400 won't ).

When I get back home, I'll try to boot at 2200MHz from XMP profile 1 and 2 see if it makes any difference (currently 7:30 am in my timezone and I'll get back home around 5 - 5:30 pm ).

Edit : to Tradesman1 - You sir, have answered all my questions concerning Ram, if I could upvote you more then once, I would!

Edit #2 : follow-up on my bluescreen problem that happened at 2133MHz, hasen't happened in 3hrs of gaming at 2200MHz yesterday.
 
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Pierre Olivier Vidal

Pierre Olivier Vidal

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If possible, what's the exact line name in ROG BIOS, I don't really know my way around there yet. Otherwise i'll just do my homework and do some research on the internet, will try that tonight.

And what are the values I should expect/go for?

 
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Pierre Olivier Vidal

Pierre Olivier Vidal

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After live chat with Asus : will test EACH RAM SEPERATLY in EACH slot to ensure it is not a deffective slot or RAM bar. If all 16 tests ( 4 bars times 4 slots ) perform well at 2400MHz, according to Asus 9 times out of 10 would be a deffective memory control on the MB itself.

here is the transcript :

Cordell S. Fri, 03/13/15 12:06:08 pm America/Rainy_River

Hello Pierre Olivier Vidal, thank you for contacting ASUS support. Please give me a few moments to review your information. I will be with you shortly.
How may I assist you today?

Pierre Olivier Vidal 12:07:48 pm

I have an Maximus VII Formula as I mentionned, and I am using Kingston Hyper-X Beast 2400MHz (khx24c11t3k4/32x) and it seems that they won't clock at 2400MHz when using the full 32GB kit, but they work perfectly at 16GB. Could it be that the board can't handle it even though it is mention it can in the QVL?
Forgot to mention, at 32GB they work at a maximum of 2200MHz, any higher and the computer won't boot. ( I am using a I7-4790k CPU )

Cordell S. 12:10:10 pm

What you need to do is test each stick one at a time, and each slot one at a time, you either have a bad stick somewhere, bad slot, or possibly a bad Dram controller on the board or CPU.
It would not be the board just cant handle it, unless its a defective board, as they surely support that RAM

Pierre Olivier Vidal 12:11:46 pm

So I'll start by testing all 4 bars of RAM in the first slot at 2400MHz and if they all work proceed with all 4 in the second slot and so on?

Cordell S. 12:12:22 pm

Yes, that would be correct, as if all sticks work fine, and in all slots one at a time like that, then its going to be Dram controller issue either on the board or cpu, 9 times out of 10 in that case, its the board.
but if you have a bad stick, it normally will not post in any slot by itself
and if you have a bad slot, when testing it by itself, it normally will not post either

Pierre Olivier Vidal 12:14:16 pm

So if all bars work in all slot, 9 times out of 10 it would be a defective board? Is there anything I can do for that? I believe i've had the board for about 1 month, maximum 2. I don't have the bill in front of me.

Cordell S. 12:15:21 pm

Yes, that would be correct, its very possible it could be the DRAM controller on the CPU, but that is less likely. and that board is covered under a 3 year warranty, so you would be well within the warranty with us. So if it boils down to a board issue, then you can do an RMA with us or see if you are still able to swap at the place of purchase. but you will most likely be out of their timeframe at this point and need to do an RMA with us. RMA is warranty repair
 
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Pierre Olivier Vidal

Pierre Olivier Vidal

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Will do a follow-up to inform people who might stumble onto this thread if the issue was resolved with the new MB.

Edit: Asus Motherboard RMA
March 18th : First stock check for the cross ship RMA

March 23rd : After no response, recontacted Asus support and did a second stock check that should take up to 48hrs

March 25th : Received the confirmation for the stock reservation and the credit card forms. Proceeded to print and complete the forms that needed physical signatures and faxed them. The forms were already darkened as it is but I figured it wasn't such a big deal.

March 27th :
- Received an email from Asus saying my forms were unreadable.
- Contacted customer support see if there's a way to complete them online, seems like they can only be faxed or sent via email, but they need to be printed first for physical signature, so in the end no way to make it less dark.
- Scanned them and sent them via email with a transcript of all the answers to the form, immediatly received an email confirming the reception of my email and saying it would be proccessed accordingly.

April 2nd : Still no news, contacted Asus once again. Seems like they never received the forms. I'll need to resend them.

April 5th : Hold has been placed on my credit card.

April 7th : Received and installed the Motherboard, problem is still present! Contacted Asus to return the replacement since the problem isn't on my motherboard and contacted intel for a deffective CPU memory control.

In the end, very dissapointed by the overall Asus customer service.

Intel CPU RMA
April 9th : Contacted Intel, made the stock check and got a call from an intel representative for the credit card information on my cell phone at work, asked to call back on work phone.

April 13th : Still no call back from the representative. Tried live chat with Intel and asked for the Cross-Ship department. Got to speak with the person who was supose to call me in matter of seconds and he explained he had left me a message (which I never received). He offered to call me back straight away while we were still on chat and he did, completed the forms in about 2 minutes.

April 14th : Credit Card was charged meaning shipment was sent, but never received an email comfirming the tracking number.

April 17th : Still haven't received my package, contacted Intel to know the tracking number. Learnt that they had a problem with their tracking number database and that the package was refused on the 14th due to ''no invoice information''. Intel representative has assured me it is the first time this ever happened and offered me a refund on the shipping cost and offered free 1 day shipping including free return which I accepted. He also mentionned I would get the package by monday the 20th for sure.

April 20th : Received the new CPU as promised. Installed it right away and when I got to testing the computer, does not boot. Tried reinstalling the old CPU, does not boot either. According to both Intel and Asus, seems like I had a short/ground issue probably due to static. will have to test outside the case, and if it still does not boot, I will need a new motherboard once again

Second Asus RMA
April 22nd : Started the procedures for the stock check for a new Motherboard once again.

April 27th : Still no news, contacted support and they mentionned a stock reserve showing on their screen, told me I should receive the email confirmation in the next 30 minutes.

April 29th : Still no email, contacted support again and they told me they are implamenting a new system and are not familiar with it yet. According to them, my file was only missing a hold amount for the credit card. They went to get it straight from a supervisor and sent me the email confirmation immediatly. I proceeded to fill the credit forms now available online, which saved me alot of time.

April 30th : credit card hold was placed.

May 1st : Received an email stating my product does not qualify for a second Cross-Ship RMA... After being charged on my credit card!! The order in which the procedures were done is unacceptable! I now have to fill papers and send my Motherboard trough normal repairs, resulting in more loss time.

May 3rd : Shipped the Motherboard.

May 7th : Motherboard received by Asus.

May 8th : Unable to repair by Asus, Motherboard is being replaced and shipped.

May 12th : Received the Motherboard. ( Odly enough, the Motherboard I received was my old one I exchanged in my first RMA according to the serial number. )

May 13th : problem still present, will have to escalate to intel engineering team.

In the end, it was not so bad, but there was alot of loss time.

Intel engineering department
May 13th : Sent the information required, they will try to reproduce the problem and will contact me again.

May 19th : Intel engineers tell me the CPU is made for up to 32GB at 1600MHz
 
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Darkstar1960

Darkstar1960

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I had 2 x 8 gb of g.skill trident x ddr3 2400 @ 10-12-12-31 with a 4790k on a gigabyte g1 mobo.I then added an additional 2 x 8 gb of same memory and had issues until I reset bios to default,then rebooted it and let it detect memory first.then I reset to xmp and have had no issues at all on all stock settings.of course that's not your setup but it might help?
 
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Tradesman1

Tradesman1

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_____________

Yes, they are being Intel and playing the 'this is our specs' game, if your are to glance throught he forums you'll see plenty of folks running 32GB at 2400 and higher (I have two Haswell rigs, one with 32GB of 2666 and the other w/ 32GB of 2800, and have seen people running even faster DRAM. Actually can look at their own listing for XMP

http://www.intel.com/content/www/us/en/gaming/xmp-for-core-processors.html
 
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