Trouble OCing G.Skill Ripjaws V DDR4-3200 CL14?

[langiroth]

Hey guys,

I'm having trouble pushing the overclock on my 2x16gb set of G.Skill Ripjaws V DDR4-3200 14-14-14-34. I can clock it to 3333Mhz @ 1.35V keeping the same timings, but anything faster is impossible. Even 3466 with relaxed timings (tried CL15 and 16) AND a DRAM voltage of 1.40V - or even 1.45V - won't even POST, let alone boot into Windows. I was hoping to go for 3600+ MHz.

I tried using both the XMP and manual modes, no luck. I haven't played around with any of the secondary timings, but I don't know if they would be relevant nor would I know what exactly to tweak.

I was under the impression that this kit was Samsung B-die and would be able to achieve a decent overclock. Did I get a dud? Or are 16gb modules really that much worse at overclocking compared to 8gb modules? Are there some BIOS settings that I forgot to adjust?

My other relevant specs are 8700k @ 5.0 (though I also tried at stock speeds with no luck), Asus Strix Z370-E (tried with both the old and new BIOS), RMx 650W PSU from Corsair.

Any insight would be much appreciated!

 

[mackerel]

I'm not experienced enough to comment on the OC part, but you can confirm the chips used in the module using Thaiphoon Burner.

 

[Woomack]

Only B die were in 3200 CL14 or higher frequency kits so I don't expect to see anything else, not to mention that no other IC can work at so tight timings. Problems can be on the BIOS side as all these motherboards are new and still have issues. Couple of threads below is one example how new BIOS fixed all issues with memory.

3600 will run at about 16-16-16 1.35-1.40V. Depends on luck. I don't know if you have to adjust additional voltages for 16GB modules on your board. Can try higher VCCIO and VCCSA.

 

[langiroth]

Only B die were in 3200 CL14 or higher frequency kits so I don't expect to see anything else, not to mention that no other IC can work at so tight timings. Problems can be on the BIOS side as all these motherboards are new and still have issues. Couple of threads below is one example how new BIOS fixed all issues with memory.

3600 will run at about 16-16-16 1.35-1.40V. Depends on luck. I don't know if you have to adjust additional voltages for 16GB modules on your board. Can try higher VCCIO and VCCSA.

The most I tried was setting VCCIO @ 1.25V and VCCSA @ 1.35V, still with no luck in even POSTing. Interestingly, if I leave them on auto with the default XMP profile (3200mhz), they default to 1.23V and 1.33V respectively which seem like pretty high values to me. I don't know the implications yet with this new chipset but I thought the rule of thumb with Z170/270 was to keep these below 1.3ish volts ideally.

I can also tighten the timings down to 3200 @ 13-13-13, 1.35V without an issue. Seems weird that DDR4-3333 looks like a hard limit in terms of speed for some reason.

 

[batboy]

My G.Skill Trident Z has a XMP voltage of 1.35, they can handle up to 1.4v with good case ventilation.

 

[Tír na nÓg]

Mine are running with 1.55v. Heck, I ran [email protected] for a while and pushed to 1.7v for some benchies, lol!

DDR3 and DDR4? Pfff, 1.65v +/-10%

On a more serious note, even during long encoding sessions or heavy benchmarks, they never get hot...

Edit: the ones I use are from the first Trident Z line (3600/17-18-18-36/1.35v, Samsung IC's) and overclock like mierda, need 1.6v for 3300/Cl14!

 

[Woomack]

My G.Skill Trident Z has a XMP voltage of 1.35, they can handle up to 1.4v with good case ventilation.

These kits can handle 1.5V+ without any airflow and for quick tests most won't have any issues to run up to 1.8V+ ( not recommended ).
Some kits have temp sensors so you can check temps in popular soft. Max temp for commercial grade memory is ~85°C ( the same for SSD and RAM ). Most kits after some overvoltage won't pass 50°C.

JEDEC specs is much lower than real voltages that we see in RAM. I have no idea on what are based specs for memory kits but in general, spec for DDR4 is 1.2V +/- 10%. First HyperX 3000 DDR4 had XMP profiles with 1.5V. Later it was changed to 1.35V. Right now only 4000+ kits have up to 1.45V ( mainly 4266+ ).

Check CL=tWCL for higher clocks. Sometimes it helps.

 

[batboy]

That's good to know. Maybe I've been overly cautious then. Even if I "only" went up to 1.45v, that would open up some options.

 

[Woomack]

1.45V let you to go up to 4500 on good sticks but won't let you run at tighter timings. Still on new platforms clock is more important.

 

[Kenrou]

Didn't manage to overclock mine much as well, was stable up to 3866mhz c16 1.45v on my 6700k/Maximus VIII Hero but i stuck to daily 3600mhz c15 1.4v (not much difference in most games) wondering if the new z270/z370 w/KL will allow for more as i was thinking of switching this for a 8700k ?

 

[Woomack]

3866 was about max for hero, this was one of reasons why I sold it after about a month.

 

[funsoul]

For benching...I run my sticks (for 2-6 hours at a time) 4000 to 4100 12-11 in the 1.95-1.98v range (on z270 apex, 1.88-1.93 on z170mocf). Obviously...you're totally on your own if you take them that high but quite a few folks say even up to 2.13 is fine. Any of these voltages is completely inappropriate for 24/7.

The 16GB sticks are A LOT tougher to get fast/tight compared to 8GB ones. If Woomack couldn't get faster than 3866, I'd say that's a good target.

 

[Tír na nÓg]

Those DDR4 sticks are amazing: @1.65v, they never see 45c!


Might run them 24/[email protected]+, just or the fun ride!

 

[Slyb]

I have the same RAM with a 8700k.
But a Gigabyte Z370 Gaming 7 motherboard.

Would be grateful if i could get some help overclocking these sticks
Like another one of those great posts by @Woomack
https://www.overclockers.com/forums...nt-Z-2x8GB-DDR4-3200-CL14-F4-3200C14D-16GTZKW

 

[Slyb]

Is 3866 16-17-17 1.40V good with these sticks?

 

[funsoul]

Give them around 1.75v and see where that gets you.

 

[Slyb]

Went up to 1.6 (I'm a wimp)
Didn't seem to get me any further though

 

[Slyb]

3866 16-16-16-34 1.40V

 

[custom90gt]

3866 16-16-16-34 1.40V

What did you do to get them stable at that voltage? Mine sadly won't seem to do above 3600 at 16-16-34 @1.45v

 

[Slyb]

What did you do to get them stable at that voltage? Mine sadly won't seem to do above 3600 at 16-16-34 @1.45v

I'm not sure
I'm new at this

Been testing with stressapptest (GSAT) and just playing with the timings a little bit at a time.
Did get errors the first time I tried to lower RCD to 16... but after I had RP stable at 16 RCD just followed.
My secondary timings are now a copy of Woomack's 4133 17-17-17 results on this page
https://www.overclockers.com/forums...nt-Z-2x8GB-DDR4-3200-CL14-F4-3200C14D-16GTZKW
(Except refresh period which I have not touched. Why you ask? Because I just can't find it )