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  Topic Review (Newest First)
07-11-2020 05:00 AM
munternet
Quote: Originally Posted by Nizzen View Post
Too bad the memory lacks memory bandwidth

4700c17 proper tweaked on z490 is about 72-74GB/s

Nice result anyway
Yeah, I know what you're saying
I was just putting it through it's paces to see if it would run a 4200cl14 stable. Not really going for performance
My daily is tweaked better for performance but still nothing like what you're talking about
I think my wife would hit the roof if I spent much more on PCs
07-11-2020 04:11 AM
Nizzen
Quote: Originally Posted by munternet View Post
Speaking of high voltages, I need 1.7 VDRAM (water cooled) to stabilize this 4200-14-16-16-36-2T with the 2x8GB 4400C19 Viper Steels
IO and SA are 1.25v and 1.35v though
No bad boots, seems rock solid
Too bad the memory lacks memory bandwidth

4700c17 proper tweaked on z490 is about 72-74GB/s

Nice result anyway
07-11-2020 01:08 AM
ogider
Quote: Originally Posted by OLDFATSHEEP View Post
It is already good enough.

What was the highest ram temp you've tried during the test?
43c but I have 80mm fan from NoiseBlocker mounted above dimms. 1200rpm. Was 26c outside case during tests.
07-10-2020 10:31 PM
metalspider well im still waiting for a ram fan so cant go 1.5v tried some trefi stuff today and saw nice gains but as soon as i heat test with the gpu under load i had errors.
my previous gskill ram had temp sensors which i miss but the viper steels are better.
07-10-2020 09:16 PM
munternet
Quote: Originally Posted by metalspider View Post
you should be able to lower twtr_L and S to at least 10 4 im doing that at 4266mhz 1.43v on my 4400C19 Viper Steels.
Thanks but I'm not keeping it. I just wanted to see if I could get 4200cl14 to work reliably with this hardware and what voltages are required
Nice work with the 4 sticks on the XI Hero BTW

Edit: Got a 4000cl13 GSAT stable but not quite TM5 1USMUS stable. Might save it and have a play in the future.
Was kinda seeing how far DRAM voltage would scale. Got to 1.735v
07-10-2020 08:22 PM
metalspider you should be able to lower twtr_L and S to at least 10 4 im doing that at 4266mhz 1.43v on my 4400C19 Viper Steels.
07-10-2020 07:11 PM
munternet Speaking of high voltages, I need 1.7 VDRAM (water cooled) to stabilize this 4200-14-16-16-36-2T with the 2x8GB 4400C19 Viper Steels
IO and SA are 1.25v and 1.35v though
No bad boots, seems rock solid
07-10-2020 06:46 PM
OLDFATSHEEP
Quote: Originally Posted by ogider View Post
trdrd sg is at 8 ..on my setup 4300 c16 flat was 7. But increase from 7 to 8 was crucial timming to reach 4533



twrwr sg dg..very similar story. a bit more stable when -1 but still not enought.

I m able to enter windows with 4600MHz cl 17-17-17 as well..but for more testing i need better bios..if the new bios will bring improvement and not other way.

from 4300 c16 flat to 4533 c17 flat i had to change:

trfc from 280 to 370 (maybe i could lower a bit 340 perhaps)
rt init 61 63 to 66 68 (maybe i could lower a bit 64 66 perhaps)
trdrd sg from 7 to 8

ddr4 voltge was 1.53V now 1.51V
sa 1.32 ->1.4 (maybe i could lower a bit)
io 1.3 -> 1.38V (maybe i could lower a bit)
It is already good enough.

What was the highest ram temp you've tried during the test?
07-10-2020 09:19 AM
Robostyle
Quote: Originally Posted by Gregix View Post
Try 32678.
To tight tREFI makes things unstable. To high with bad OC/timings may lead to file corruption and broken OS.

Besides, JEDEC formula as I know is 7.8xmemory speed/2 for tREFI, so in your case, it should be 7.8*1600=12480 and this is minimal value u can/could set.
And is somehow related to tRFC so...
There is some stability gains actually, when I follow jedec values - memtest error popup rate drops ~trice, and it doesn't bsod at least. Still, it gets errors.
32000 does work stable as well, though I need some testing to be done, before actually saying its stable
tREFI lower than 16-20000 won't go stable.

Quote: Originally Posted by Larkonian View Post
A tREFI of 65535 might default to some auto setting. I've suspected as much from seeing lots of people able to run that value even with high voltages.

Try setting tREFI to auto and see what you get.
Auto = 8316, so it's either false value by ATC, or motherboard simply can't do autotune, only EC defaults.
07-10-2020 08:58 AM
ogider
Quote: Originally Posted by OLDFATSHEEP View Post
Your IMC is much better than that guy. That guy used 1.65V VCCSA and 1.6V VDIMM to run 4500C17.

I'm curious: can you further shrink your tRDRD/tWRWR sg and dg to 6-4 and all dr values to 5?
trdrd sg is at 8 ..on my setup 4300 c16 flat was 7. But increase from 7 to 8 was crucial timming to reach 4533



twrwr sg dg..very similar story. a bit more stable when -1 but still not enought.

I m able to enter windows with 4600MHz cl 17-17-17 as well..but for more testing i need better bios..if the new bios will bring improvement and not other way.

from 4300 c16 flat to 4533 c17 flat i had to change:

trfc from 280 to 370 (maybe i could lower a bit 340 perhaps)
rt init 61 63 to 66 68 (maybe i could lower a bit 64 66 perhaps)
trdrd sg from 7 to 8

ddr4 voltge was 1.53V now 1.51V
sa 1.32 ->1.4 (maybe i could lower a bit)
io 1.3 -> 1.38V (maybe i could lower a bit)
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