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*Official* Intel DDR4 24/7 Memory Stability Thread - Page 220

post #2191 of 5721
Quote:
Originally Posted by KedarWolf View Post

OP is a bit unclear, I do 'To bring up system info within Mint Terminal, type: sudo dmidecode type 17 and scroll to the relevant info.' and I get a Window with a few pages of scrolling info, not really sure what to include, but i'll re-add my submission with just what the OP says and System Monitor. redface.gif

"sudo dmidecode type 17" doesn't work properly - try "sudo dmidecode -t 17".
post #2192 of 5721
KedarWolf 5960x @4.7/4.5---2666Mhz-C12-12-12-32-1T 1.4v---SA 1.12v--- Stressapptest 2 Hours

1.263v Core
1.248v Cache
1.92v CPU Input


    
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post #2193 of 5721
Quote:
Originally Posted by djgar View Post

"sudo dmidecode type 17" doesn't work properly - try "sudo dmidecode -t 17".

Thank you. smile.gif
    
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post #2194 of 5721
Thread Starter 
Quote:
Originally Posted by stargate125645 View Post

Again, that's entirely vague...so never mind I guess.


Sorry, start a thread if you want to be spoon fed.
post #2195 of 5721
Quote:
Originally Posted by Silent Scone View Post

Check RTL/IOL, these settings are chosen by the board during the training routines, and can drift depending on the condition of the test

A lot of other parameters adjusted by training that can't be changed manually, so it's always wise to test under different conditions and work in some headroom.
Quote:
Originally Posted by GRABibus View Post

Can RAM stability due to too low Vccin ?
Can cache stability due to too low Vccin ?

Probably for the first question. Yes for the second.

Still wouldn't be the first thing I'd look at though.
Quote:
Originally Posted by stargate125645 View Post

I just find it odd that the CPU would be perfectly stable at 4.4GHz with only 1.2V for cache, but then complain endlessly about 3200MHz RAM at even CL15, and even when I lower the cache down to 3.8GHz. I still question whether my RAM simply doesn't operate at binned specifications.

Perfectly possible to have bad memory, or memory that was right on the edge under the manufacturer's test conditions.

Higher CPU and cache speed will put more strain on the memory by shifting any bottleneck more and more to the memory as the other parts become able to process data faster. In general, anything that increases memory performance is going to increase memory strain.

A long series of tests with the CPU as close to stock as XMP allows would be needed to see if the memory really is defective.
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post #2196 of 5721
Quote:
Originally Posted by Blameless View Post

Perfectly possible to have bad memory, or memory that was right on the edge under the manufacturer's test conditions.

Higher CPU and cache speed will put more strain on the memory by shifting any bottleneck more and more to the memory as the other parts become able to process data faster. In general, anything that increases memory performance is going to increase memory strain.
That's what I read previously, though was told above differently. Go figure.
Quote:
A long series of tests with the CPU as close to stock as XMP allows would be needed to see if the memory really is defective.
I will put the CPU at stock and test the memory with XMP default settings. That's what I was trying to mimic by lowering the cache back down dramatically and testing at XMP RAM settings. If it doesn't work at XMP settings with no CPU overclock, I'll contact G.Skill. Is it possible for the core overclock to affect the memory significantly? I ask because if the answer to that is no, my cache frequency isn't going to get much lower than 3.8GHz when putting things to stock values. I suppose I could raise core voltage further if that could help. Assuming things do work with stock CPU settings and XMP, increasing the core frequency is more beneficial than memory from what I've seen in benchmarks, so I would imagine my best bet is to just go with the looser timings.
Edited by stargate125645 - 7/21/16 at 10:55am
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post #2197 of 5721
Thread Starter 
Contacting G.Skill is pointless. XMP is not certified to work with every CPU, if you're looking for faulty memory test the system at stock, this much should be obvious.
post #2198 of 5721
Exactly this. My CPU has a bad IMC, but with a bit of tweaking decent timings are possible. XMP isn't guaranteed to work on all CPUs, and it depends on how the manufacturers test their XMP compatibility (sample size, motherboards, DIMM layout, channels). Sometimes if you've tested more than 2 kits and XMP fails out of the box, no matter how much VTT and VCCSA tweaking you do, then you have a dud IMC. However, those kits are guaranteed to operate on JEDEC spec (2133MHz for HW-E, 2400MHz for SK, BW-E).

The easiest way to know if it is the IMC is to make sure to test with different kits beforehand (although that may not be financially doable).
post #2199 of 5721
The cheaper the RAM, the more pleasant the surprises regarding it's performance tend to be!
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post #2200 of 5721
Quote:
Originally Posted by Blameless View Post

The cheaper the RAM, the more pleasant the surprises regarding it's performance tend to be!

Right?! I got 8GB of DDR3-1866 CL9 for $60 back in 2013. Surprisingly, it ran 2200MHz @ 9-10-9-27 2T, IIRC, with just 1.70V. Not gonna lie, but that alone turned me onto RAM overclocking, which I had never really cared about (don't hate me).
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