P775DM3-G with Gskill Ripjaws 3200MHz

(Sorry for my bad English because I'm French ^^)
Hi,

I have a P775DM3-G (with 7700K) and I just bought a kit 2x16GB Gskill DDR4 3200MHz but now I’m struggling to enable the XMP profile.

At first, I got it installed in RAM3/RAM4 slots (behind the bottom cover), the system didn’t even POST. So, I switched to RAM1/RAM2 slots under the keyboard. It was the same thing.

Then I contacted my reseller (PCSpecialist, I know they are not Prema Partner, unfortunately btw) for a BIOS update. I think they have sent me a stock BIOS from CLEVO (1.06.11). I also did the trick that I installed a stick first in the RAM4 slot, then enabled XMP, reboot and finally installed the second stick to RAM2 slot.

Things went a bit better as the system can boot normally but as soon as I get into Windows it crashes with BSOD.

I tried to bump the CPU Voltage a little bit. I set Core Voltage to Override, disable the offset voltage and bump around 1.25-1.4V. It’s didn’t work either. I also noticed that my PC always reverse to set the offset voltage to the default value (-100mV) after each reboot.

Since my BIOS doesn’t have much options so I’ve used Intel XTU to bump VCCSA a little bit by increasing the SA offset voltage. But as soon as I set the XMP then reboot, my PC doesn’t even POST like in the first place.

As of now I’m running @2400MHz, Memtest+ gives no errors so I think it’s can be a faulty RAM.

Can anyone help me about this ?

 

first off, set everything to stock in bios, especially CPU VCore & clocks. so just load default values, you dont want any cpu instabilities messing with the RAM testing.

then bump both VCCSA and VCCIO voltages to 1.25 V and manually set VDIMM to 1.35 V. reboot to apply the voltage changes. only then try to enable the XMP profile, again starting first with only one stick, then adding the second.

also, when your laptop boots with black screen, let it cycle for 5-10 minutes, you will notice that it will keep rebooting, with the mobo trying different settings and thus "training" itself and the RAM until it finds stable settings.

good luck!

 

Thanks for the reply.
How can I change the VCCSA and VCCIO beside XTU because I don't have a Prema BIOS ?

 

aside from XTU, you can also try Throttlestop.

 

be aware that anything going above 3000 Mhz on RAM requires lots of tweaking and finetuning to get it stable on laptops

 

Here is my ThrottleStop Windows. I couldn't modify VCCSA directly. All I have is just the offset voltage like in XTU or in BIOS

 

Stock VCCSA is 1.05V, so you can start at +200 mV offset

oh and adjust those VCore and Cache voltages to 0 offset.

 

Slot 2 and 4 is single channel.

 

good point!

try and stick to the two slots on the same side as the cpu, they have shorter traces and thus more chance to succeed.

Sent from my Xiaomi Mi Max 2 (Oxygen) using Tapatalk

 

I still see CPU-Z report them as Dual Channel ? I'm talking about those slot marks on the board. I know I should stick to the two slots at the Bottom cover but it didn't work for me so well.

That was the thing that I have tried in the first place. No luck.

 

I had best luck in my machine with 1 and 4, seems like less interference. 2666mhz dual channel is better than 3200mhz single.

 

I'm little bit confused. The slot 3-4 is on the CPU side but which one is the slot 4. The one on the top or the one on the bottom, right on the board ?

My kit comes with just one XMP profile at 3200MHz. So for 2666MHz I'll have to go manually.

The real problem is that my locked BIOS didn't allow me to do much. I wish I could have the magic from @Prema

 

Update:
I have figured out which is the slot 4. The funny thing is that even with one stick the system still refuse to boot with XMP.
I made a mistake before. It was RAM2+RAM3 (not RAM2+RAM4), so it was reported as Dual Channel.
So summary:
RAM3, one stick =>no problem, XMP Single Channel. Nothing special.
RAM4, one stick => no boot
RAM3+4 or RAM1+2 => no boot
RAM1+4 =>no boot
RAM2+3 => boot normally but BSOD.
Frankly I'm getting a bit tired of this. I need my PC for school too

 

ok just to clarify: u CAN use both sticks in dual channel at stock profile, correct? only once u try and enable XMP does it give u issues?

and yes, welcome to the world of ram tweaking, takes a loooooooot of time and patience

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That's correct. On stock 2400MHz, everything was fine. Things only went wrong on XMP Dual Channel, or XMP but not in the "right RAM slot"
I've read some about RAM tweaking and I also tried it a little bit before with a desktop (Z77+3770K) but it's my first time for me on a Laptop. Couldn't do many thing with stock BIOS.

 

what u can do instead: manual tuning. leave all timings at 2400 mhz stock, then up the frequency one step (say, 2500 or 2667 mhz for example. depending on what kinda options xtu gives you). then test with tm5. if stable, go one more step up and test again. if unstable, loosen primary timings by 1-2 and repeat.

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Looks like I'm going back to XTU again )
Off-topic question: Do I need to disable the XTU component in Clevo Control Center installation to avoid colission between them ? As I saw there is an overclocking section in CCC too and it looks exactly the same as XTU.

 

nah, no worries. that OC / xtu section is actually connected to xtu installation, so you can just leave it alone. id prefer xtu over CCC OC

 

Does the changement in XTU apply directly to BIOS or just in software level like Throttlestop ?

 

both actually have a connection to the bios firmware.

 

XMP is not as robust as the desktop, I'd suggest manually tweaking the speed and timings to match those listed in the spd.

 

I'm trying to manually tweak the speed and timing like XMP, bump the VDIMM to 1.35V in BIOS and bump VCCSA by XTU. I'll update it later if I get some improvements.
Oh. I just tested ThaiphoonBurner too. It reported that there are some address domains on SPD data are not accessible because of BIOS locks. Is it really because of BIOS or the RAM itself ?
Tbh Thaiphoon Burner is somewhat too difficult for me.

 

yep TB should only be used if you reaaaaally know what youre doing in terms of RAM tweaking

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The latest chips have extra protection making TB less useful.