Underclock DDR3 ram for Skylake?

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MrAlecfrey

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A few months back I picked up a 6600k, z170-p d3, and 16 gb of Kingston hyperx fury ram. I have had no problems but all the talk about ddr3 ram burning your Skylake cpu scares me. Should I underclock my ram to 1.35 volts? And if so how?

 
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photonboy

photonboy

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http://www.kitguru.net/components/motherboard/anton-shilov/intel-prolonged-usage-of-ddr3-memory-at-default-voltages-can-damage-skylake/
and
http://wccftech.com/skylake-does-not-support-ddr3-damage-ddr3l-only/

"But prolonged use can (and will) damage your brand new Skylake chip"

So.. yeah, it's a big problem.

I'd drop to 1.35V and tweak to the highest setting you can that's still stable. Use memtest86 free version to help www.memtest86.com

(Unfortunately you're starving your CPU at anything less than about 1866MHz CAS9 in some scenarios... if you need 1333MHz to get stable you're definitely losing performance at times.)
 
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photonboy

photonboy

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How?
In the BIOS, but it's a combination of voltage and other timings specific to your memory.

If you run "CPU-Z" it may give a list of profiles the memory natively supports, but mine only has 1.5V or higher. I don't know if you have a 1.35V profile or whether you can get that stable at all.

(I'd consider asking Asus for a refund or swap to another motherboard because frankly I think they're responsible here. It's their mistake since technically Intel stated DDR3L support not DDR3 for these CPU's.)
 
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MrAlecfrey

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kingston fury hyperx 16gb 1866
 
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MrAlecfrey

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HX318C10FBK2/16
 
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junkeymonkey

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skylake only supports low voltage ddr3 memory and using 1.5v or higher can/ could burn up the chips memory controller 1.35 is the max you should use on it good luck

this is stated in articles and I think at intel as well ??

Memory Types DDR4-1866/2133, DDR3L-1333/1600 @ ''1.35V ''

 
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MrAlecfrey

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My mobo supports 1.5v ram. I was unaware of this when I purchased it.
 
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MrAlecfrey

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How can I underclock my ram?
 
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junkeymonkey

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its not the clocks or ram speeds its the voltages

http://wccftech.com/skylake-does-not-support-ddr3-damage-ddr3l-only/

like 4Ryan6 said above about setting it down if you bought standard or high voltage ddr3

me I would just get ddr4 unles I was reuseing ddr3 I all ready had around just to use

why would you go ddr3 and skylake to start with ??? you would of been far better off with a haswell sky lake blows chunks for compatibility
I'd never conceder it over a haswell -- too limiting a platform as I see it [opinion]
 
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4Ryan6

4Ryan6

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Unfortunately for you the

JEDEC standard 1.5V (1.425V ~1.575V)

The minimum operating voltage is 1.425V underlined above, the information is from the
HX318C10FBK2/16 PDF specifications from the Kingston website of the memory modules you purchased.

So the bottomline is if you are afraid you're going to damage your CPU then ease your tensions and buy some DDR3L at 1.35v.

**********************************************************************

But from an overclockers point of view thousands have been doing exactly the same thing with earlier CPUs when they ran DDR3 spec'd at 1.50v with memory running at 1.65v, and how many have failed because of it?

None to my knowledge!

Is your motherboard capable?

https://www.asus.com/us/Motherboards/Z170-P-D3/

It most definitely is!

(I would make a printed copy of that link to ASUS regarding your motherboard and keep it for my records.)

If there is a problem which I seriously doubt there will be, guess where the responsibility lies, at ASUS front door as their own advertising thoroughly covers it!

Personally I would go ahead and run what I have and not give it another thought, but if you cannot that's totally up to you.

 
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MrAlecfrey

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Would it burn my cpu or alot of other components too? Also, would ASUS cover the damage?
 
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junkeymonkey

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thing is though , not warnings then as skylake gets now .. like I said if I was to do skylake it would be for ddr4 use and that's the only thing I see you get from it it sure not like cpu support or full usb compatibility [intel removed some usb support on haswell I guess they want to make it proprietary in some way ?? or force you to 10 ??]

http://wccftech.com/intel-skylake-remove-support-usb-based-windows-7-installation-platform-specs/

cant see doing a platform that seems to have my hands tied in some ways when hard running haswell builds don't , but that's just me

lot of sales hype smoke screening some facts and now here you are

is it too late to do a rma of the ddr3 and exchange it for ddr4 ??

good luck
 
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MrAlecfrey

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When I bought it I had no clue that it was bad to use with skylake. I watched videos and saw no increase in gaming performance. I choose skylake because it was new and seemed like the best.

It probably is since I bought it in September I think
 
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junkeymonkey

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its not that skylake is ''bad'' its just a few things not brought up front and most find out after the fact .. [buy on hype not on facts ]

its a primarily ddr4 platform ddr4 is low voltage memory [something like 1.20v ??] so using ddr3 on the same controller its limited to 1,35 max [split controller]

you may vcan run at 1.5v or higher but its at your own risk . may run for years with out any degradation or stability issues /cooling then it may bugg out everytime you do something demanding or anything at all

all you can do is see the warnings witch I;m sure is to protect intels interests and liability ? if you got a great binned chip it may hold up great under ddr3 at 1.5 v ??

if its a concern to you reguardless just trade the ddr3 in for ddr4 that fully conforms to the platform ?


one more example

haswell controler is ddr3 1,50v so you put ddr3 1,65v in it thats only .15v over volt on the controler

skylake is a primary ddr4 controller rated at 1.2v now to support the split controller for ddr3l its overvolted to 1.35 thats only .15 like the ddr3 at 1.65 . no big issue

now you stick 1,5v ddr3 on it you now got the ddr4 controller overvolted to .3v [x2 over spec ]

see how things can start to heat up and stress a bit ?? you now wen from 1.2 normal to 1.5 over

that's like setting memory on haswell from 1.5 to 1.8v [better have good heat spreaders on them sticks ]

then is the split ddr4/ddr3l controller as forgiving as the straight ddr3 controller of haswell ???


 
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4Ryan6

4Ryan6

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Probably not burn the CPU, and not any other components related to the motherboard.

As far as ASUS covering any damage, assuming it happens, ask them, none of us work for ASUS, you'll have to call ASUS support, and by call I mean get them on the phone and actually talk to someone.

However I'm confident ASUS would not have included DDR3 in the boards capability if they were not 100% confident it could handle 1.50v DDR3 memory.

Like I already said overclockers have been pushing memory voltage for years with no problems, myself included!

 
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junkeymonkey

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some how I got the wrong board when I looked ? I see now

well sorry I thought it was a combo [why a straight ddr3 on 1151 anyway is super odd to me ] ??

I guess your down to what 4ryan6 says above run what they claim and save all documentations and if it fails dump the ball in there court ???

I now also see on the boards memory list they got 1.65v listed as well ??

asus says it al lgood then what can you do now next to just trade in for ddr3L 1.35 memory if your still concerned.

i'll still hold to what I said above about the voltages on the chip 1.20v controller and asus is fine with running 1,65v ?? all you can do is take there word on it and run ??


sorry for all my misunderstanding on your board but my point still remains the same

4ryan6 - that was meant in general but point taken on how you seen that you '' '' it seeing it don't pertain to his board


just found this

''In a conversation with ComputerBase.de web-site, an Asustek representative said that the company’s Asus Z170-P D3, Z170M-E D3 that support DDR3 memory modules are fully-compatible with 1.5V and 1.65V DDR3 DIMMs.''


''it does not seem that makers of motherboards and Intel truly want to make such platforms. In general, the vast majority of Intel “Skylake”-supporting platforms will support DDR4 memory, which will help the transition to the new type of DRAM''

http://www.kitguru.net/components/motherboard/anton-shilov/asusteks-intel-z170-mainboards-will-work-correctly-with-ddr3-1-5v1-65v-modules/

read in to that as you will I guess ?? I figure if there was no issue there would be no issue in making the platform fully compatible ??

don't know just do what you can and hope for the best
 
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