[OrionBG]

Hmm I don't know what I am doing wrong with MPT but wattage does not change . I saved the bios from gpuz then loaded it with MPT changed the wattage and tdc and clicked write still stock 281 watts.. Also what is the minimum gpu clock slider for videos?

Did you reboot? You need to reboot every time you write something with MPT.

 

[OrionBG]

Hey guys, new member here. Anytime I'm overclocking anything on my PC I usually end up in here reading discussions and learning...
...

According to this video from Actually Hardcore Overclocking, the VRM is doing almost nothing at 300A at 1.2V. The video is for the RX 6800XT Merc 319 but I'm 99% sure the PCB is the same and the VRM is at least the same spec. That means 14 phase VRM at 70A each phase... P=U.I
Basically, the max theoretical power that this VRM can provide (14x70A).1,2V = 1176W that is the max that can go through the VRM... Theoretically (according to the VRM specifications)

 

[HyperC]

Did you reboot? You need to reboot every time you write something with MPT.

Nope didn't know that part lol, thanks ill check in a couple hours, I love amd and rebooting so much fun.. oh first power up I tried to enable sam and seems to disable csm rebooted back into bios enabled csm saved then black screen ?

 

[dagget3450]

It is quite a mess right not due to the removal of the 2 2080Ti-s but I'll fix it when I get the GPU block. One 480 top, one right, one left, and the 2x 360 are on the back. Unfortunately, it is about 70 kg and I can't easily move it to make a photo of them.
View attachment 2477807
BTW, if you are wondering why the GPU is not inside the case... It is too long to fit with the air cooler...

Hey, i have to ask. The PCIE extender cables i see anywhere are PCIE 3.0, The gpu is 4.0 so with ryzen 3xxx/5xxx your looking at 4.0 pcie slot to card. Do you know for a fact the PCIE extender will work @ 4.0 speeds?

Genuinely curious as i'd like to do a custom build using a pcie extender cable(riser) but last time i tried was many years back and they were buggy.

 

[OrionBG]

Hey, i have to ask. The PCIE extender cables i see anywhere are PCIE 3.0, The gpu is 4.0 so with ryzen 3xxx/5xxx your looking at 4.0 pcie slot to card. Do you know for a fact the PCIE extender will work @ 4.0 speeds?

Genuinely curious as i'd like to do a custom build using a pcie extender cable(riser) but last time i tried was many years back and they were buggy.

I was also quite surprised that this old riser I had from a 3-year-old Lian Li PC-o11 WRX (the model before the Dynamic) work perfectly at PCIe4.0
GPU-Z is reporting PCIe4.0 at 16X and no issues at all.

 

[OrionBG]

Nope didn't know that part lol, thanks ill check in a couple hours, I love amd and rebooting so much fun.. oh first power up I tried to enable sam and seems to disable csm rebooted back into bios enabled csm saved then black screen ?

For SAM to work, you need to disable CSM! This is the first thing I do on a new system actually, Disable CSM... UEFI for the win

 

[chispy]

What are you trying to gain with vBIOS flash/ modified vBIOS?

Why do you always ask so many questions instead of trying to help ??? The last 2 or 3 questions you asked i did answer for you and you never even say thank you ...

anyways , if anyone knows how to do what i ask and if possible i will be grateful.


I'll be nice to you today:

@ZealotKi11er - your answer is here = AMD RX 6900xt / 6800xt / 6800 Overclocking tweaks , tricks and mods. ( yes , i will be running this card on liquid Nitrogen once i find out how to mod the bios , i already did hardware volt mods with evc2 and ran sub-sero on water chiller @ -21c and single Stage Phase dual compressors @ -52c , for pre-testing , obviously next test will be mounting my gpu Ln2 pot on it and run LN2 to it for competitive benchmarking at hwbot for my Team Overclock.net , yes this forum , my house. )

 

[HyperC]

Starting to get the hang of AMD drivers now it all looked chinese to me, never knew AMD likes doing green screens do i need to up my power limit more or stop testing at 2800mhz slider? seems to go green at 2640mhz timespy

 

[ZealotKi11er]

Why do you always ask so many questions instead of trying to help ??? The last 2 or 3 questions you asked i did answer for you and you never even say thank you ...

anyways , if anyone knows how to do what i ask and if possible i will be grateful.


I'll be nice to you today:

@ZealotKi11er - your answer is here = AMD RX 6900xt / 6800xt / 6800 Overclocking tweaks , tricks and mods. ( yes , i will be running this card on liquid Nitrogen once i find out how to mod the bios , i already did hardware volt mods with evc2 and ran sub-sero on water chiller @ -21c and single Stage Phase dual compressors @ -52c , for pre-testing , obviously next test will be mounting my gpu Ln2 pot on it and run LN2 to it for competitive benchmarking at hwbot for my Team Overclock.net , yes this forum , my house. )

I have been told VBIOS changes don't unlock anything for RX6xxx.

 

[ZealotKi11er]

Starting to get the hang of AMD drivers now it all looked chinese to me, never knew AMD likes doing green screens do i need to up my power limit more or stop testing at 2800mhz slider? seems to go green at 2640mhz timespy

The green screen usually when fclk goes bad.

 

[HyperC]

so raise the SOC from 55a to 60?

 

[ZealotKi11er]

so raise the SOC from 55a to 60?

I set mine to 75. What display do you have? If its 1080p and still get green screen its probably something else.

 

[HyperC]

atm I have 2 main is 1440p 165hz other 1080p 144hz, can the voltages be edited ? btw how did you come across this issue my google-fu must be broken

 

[ZealotKi11er]

atm I have 2 main is 1440p 165hz other 1080p 144hz, can the voltages be edited ? btw how did you come across this issue my google-fu must be broken

Does this happen at stock settings?

 

[HyperC]

before using MPT only ran it once never messed with the sliders at all, tried 75 soc crashed upped the wattage no crash but lower score

 

[SLAY3R8888]

According to this video from Actually Hardcore Overclocking, the VRM is doing almost nothing at 300A at 1.2V. The video is for the RX 6800XT Merc 319 but I'm 99% sure the PCB is the same and the VRM is at least the same spec. That means 14 phase VRM at 70A each phase... P=U.I
Basically, the max theoretical power that this VRM can provide (14x70A).1,2V = 1176W that is the max that can go through the VRM... Theoretically (according to the VRM specifications)

I watched this video when he made it. Thanks for pointing that out for me. In your opinion, does this theoretically mean that is the point when the VRM's would be ruined? Obviously it would be on fire way before then with my thermal solution but yeah 🤣. So it's reasonable to say that I could attempt pushing power limit up a bit more as long as thermals aren't getting close to around 100c junction? I know overclocking involves some guessing and risk, just wondering if you would say this is a reasonable rule of thumb to be following? My guess is that I can go up to roughly 400 - 420w total power limit, at which point I would be using the max voltage of 1175mV to drive clock speeds up with stability, and thermals would get warm enough for me to want to quit going further. I'm just waiting for the card to give me a sign that it's had enough, and that hasn't happened yet.

 

[HyperC]

OKay getting better my card seems to want more wattage only soft crashing 2nd test timespy guess ill pump in 380 watts

 

[SLAY3R8888]

Nope didn't know that part lol, thanks ill check in a couple hours, I love amd and rebooting so much fun.. oh first power up I tried to enable sam and seems to disable csm rebooted back into bios enabled csm saved then black screen ?

I can't help with your issues enabling SAM as I followed a guide I found online and didn't have any issue. But I wanted to tell you an easy way to validate your changes in MPT to make sure they applied, or to reference them later. Just save your Bios from GPU-Z again after doing "Write SPPT" and rebooting PC, and name it something different than your stock Bios. Then you can load that one in MPT to see / change your current settings, instead of starting over with loading the stock Bios every time. Idk how this works exactly because it's just a registry mod, but I think pulling the Bios again after you do a "Delete SPPT" will show the settings back at stock configuration.

 

[SLAY3R8888]

OKay getting better my card seems to want more wattage only soft crashing 2nd test timespy guess ill pump in 380 watts

That's where I'm at now is 380w but it hits the limit sometimes still at 1162mV. I'm stuck at 2500 - 2600mhz for now, but thermally it wants more power I think. I took a break from OC'ing to game on it for a few weeks, about to push it more.

 

[HyperC]

I can't help with your issues enabling SAM as I followed a guide I found online and didn't have any issue. But I wanted to tell you an easy way to validate your changes in MPT to make sure they applied, or to reference them later. Just save your Bios from GPU-Z again after doing "Write SPPT" and rebooting PC, and name it something different than your stock Bios. Then you can load that one in MPT to see / change your current settings, instead of starting over with loading the stock Bios every time. Idk how this works exactly because it's just a registry mod, but I think pulling the Bios again after you do a "Delete SPPT" will show the settings back at stock configuration.

I got SAM working for me had to convert my windows drive to GPT try this if you haven't yet Still using BIOS? It's time to switch to UEFI — here's how on Windows 10.

Timespy test 2 doesn't like seems anything over 2650 guess i need more vcore for that...first test I can probably hit around 2750 2800 ..... So why does amd force 100mhz min to max is there away around it?