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*Official* Intel DDR4 24/7 Memory Stability Thread - Page 266

post #2651 of 6344
Quote:
Originally Posted by Silent Scone View Post

Can you confirm what kit you are using?

G.SKILL Ripjaws V Series 32GB (4 x 8GB) 288-Pin DDR4 SDRAM DDR4 3200 (PC4 25600) Intel Z170 Platform / Intel X99 Platform Desktop Memory Model F4-3200C16Q-32GVKB http://www.newegg.com/Product/Product.aspx?Item=20-231-942

I manually placed the default xmp settings except the frequency is set at 3000mhz.
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post #2652 of 6344
Quote:
Originally Posted by greg1184 View Post

G.SKILL Ripjaws V Series 32GB (4 x 8GB) 288-Pin DDR4 SDRAM DDR4 3200 (PC4 25600) Intel Z170 Platform / Intel X99 Platform Desktop Memory Model F4-3200C16Q-32GVKB http://www.newegg.com/Product/Product.aspx?Item=20-231-942

I manually placed the default xmp settings except the frequency is set at 3000mhz.

I don't know why NewEgg shows X99 for that kit when G.Skill only validated it for Z170.

http://www.gskill.com/en/product/f4-3200c16q-32gvkb
post #2653 of 6344
Thread Starter 
Quote:
Originally Posted by sabishiihito View Post

I don't know why NewEgg shows X99 for that kit when G.Skill only validated it for Z170.

http://www.gskill.com/en/product/f4-3200c16q-32gvkb

This happens a lot. Always check the memory vendors website.
post #2654 of 6344
Well that explains a lot. Maybe I should sell it and carefully choose a kit that would work optimally with x99.
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post #2655 of 6344
Quote:
Originally Posted by superkyle1721 View Post

1) changing tREFI to auto then changing it to 2*Auto and finally adjusting it to MAX value shows zero changes in perceived stability and AIDA throughput.

Going from auto to 2x+ tREFI should show a modest reduction in memory latency and often a minor increase in read bandwidth. Value might not be sticking if you see no change.

Regardless, for messing with either tREFI or tRFC, I'd recommend testing with GSAT for at least two hours with only enough case/board cooling enabled to keep your CPU from overheating. Retention time is heavily dependent on temperature and if you don't test your memory in a worst case scenario you run the risk of any abnormal spike in ambient, dust accumulation, heavy GPU load, or anything else that pushes case temps above normal inducing instability.
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post #2656 of 6344
lilchronic--i7 5820K @4.55/4.55---3600Mhz-C16-16-16-38-1T----1.43v---SA 1.06v---Stressapptest----1 Hour
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post #2657 of 6344
Quote:
Originally Posted by lilchronic View Post

lilchronic--i7 5820K @4.55/4.55---3600Mhz-C16-16-16-38-1T----1.43v---SA 1.06v---Stressapptest----1 Hour

Noice! thumb.gif
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post #2658 of 6344
Quote:
Originally Posted by djgar View Post


Praz, I've had some situations where I experienced significantly higher voltages than I specified in the BIOS (much as you warn) when I read the Aida measurements, but I'm assuming the reported voltages are correct, hopefully? I ended up putting lower than the expected in the BIOS and by several tries got a reading around what I was looking for.

Hello

As Raja wrote this cannot be monitored with AIDA. These voltage also have no effect on the values seen for the user set CPU, cache or memory voltages. The voltages related to the OC Socket should not be considered an applied voltage as one would with the CPU or cache voltage for example. The difference being the OC Socket voltages are manipulated to alter the behavior of the associated internal CPU circuits.

As to my preference of 3200 for 24/7 use consider the following for Broadwell-E. One of the OC Socket rails that is manipulated in conjunction with memory speed is being increased up to 35% higher by Intel over stock memory speed. An OC Socket board may add another 30% or so voltage on top of this if the set memory speed is high enough. A lot of of what is going on with these circuits is shrouded in mystery for all but a few at Intel. The long term effect of these increases are even less known.
post #2659 of 6344
Gigabyte boards with the OC socket reveals some of these reserved voltages to user control in the form of the VL1-6 options that are available, and I've seen some of these values, left on auto settings, push a 60-70% overvolt.

As Praz says, no one seems to know exactly what they do. I've never been able to get a straight answer from anyone with the authority to speak for any motherboard company about their precise function. Best info on hand comes from tweakers like Der8auer--who isolated what he calls the 'uncore supply voltage' (while probably far from accurate nomenclature, this seems to be equivalent to the VL6 option on Gigabyte boards with the OC socket)--and others who have the inclination to risk breaking a lot of stuff via trial and error. Again, as Praz mentions, these aren't major voltage rails, most of them seem to be one or two pins carrying almost no current, so clearly telling the CPU to do something internally, and aren't powering components themselves.

Anyway, I do like having manual control over what I can, and I use VLs well below auto settings when I use the OC socket on my X99 SOC Champion to hedge my bets against early failure/degradation.

I would like to see some detailed investigation of all the reserved lands and what the OC sockets are doing with them, but no one seems inclined to do this for free and release the info publicly.
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post #2660 of 6344
Quote:
Originally Posted by Praz View Post

Hello

As Raja wrote this cannot be monitored with AIDA. These voltage also have no effect on the values seen for the user set CPU, cache or memory voltages. The voltages related to the OC Socket should not be considered an applied voltage as one would with the CPU or cache voltage for example. The difference being the OC Socket voltages are manipulated to alter the behavior of the associated internal CPU circuits.

As to my preference of 3200 for 24/7 use consider the following for Broadwell-E. One of the OC Socket rails that is manipulated in conjunction with memory speed is being increased up to 35% higher by Intel over stock memory speed. An OC Socket board may add another 30% or so voltage on top of this if the set memory speed is high enough. A lot of of what is going on with these circuits is shrouded in mystery for all but a few at Intel. The long term effect of these increases are even less known.

Thanks for the great info, Praz!
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