@Seanoog , also ask @LtMatt to link you his profiles.
Thank me later.
Thank me later.
Disclaimer - Click me!!
Follow this advice at your own risk, i accept no blame if you enter stupid values and break your GPU. You can just use Radeon Software > GPU Tuning to undervolt and optimise performance and power draw. However, if you like to tweak things further to tune your GPU for the best possible optimal performance and power draw, then read on.
Yes, tuning a RX 6000 series graphics card is much like making love to a beautiful woman.
It's important not to rush, but with a bit of patience and subtle tweaking - it can be very satisfying.
I'll explain the process I use for tuning my 6900 XT.
I have two base profiles. One is aimed for low power, silent gaming at above stock performance. The second is aimed at a providing more performance, at the expense of higher power draw, fan speed and temperature.
From my testing so far in the game I play, I've only needed the first profile. These profiles are initially defined by settings used in MorePowerTool (MPT).
MPT allows you to adjust the default core and soc voltages, along with the default total board power (referred to as power limit W in MPT) and the thermal design current (TDC). Doing this will allow you to extract more performance from the 6900 XT and reduce voltage. Here are the two MPT profiles I use, I will call the first Quiet and the second Balanced.
For both profiles i reduce the soc voltage from 1.150v to 0.912v. This saved a few watts and reduces temps, giving you more core/temp headroom. Values too much below 0.900v cause instability, so 0.912v works on my sample. YMMV, but 0.950v should be safe for everyone, including 6800 XT owners which have slightly different values.
The Quiet profile has a power limit W of 275 set in MPT, Balanced has a power limit w of 325W set in MPT.
Setting up MPT
1. Download MPT and GPU-Z.
2. Run GPU-Z and save the BIOS somewhere safe on your PC.
3. Launch MPT, click Load, load the BIOS you just saved.
4. Select the drop down box and your 6900 XT.
5. Click Power and Voltage tab.
6. Change only one of the following, Max soc voltage, Power Limit W, TDC.
7. Once you've made your desired changes, click Write SPPT.
8. Reboot.
9. Your settings are applied on next boot.
10 Click Delete SPPT in MPT to restore default values.
11. You'll also want to use HWINFO64 and Rivatuner or MSI Afterburner with Rivatuner to setup OSDs so you can monitor core clock, voltage, fan speed and temps of the GPU.
Quiet Profile
Balanced Profile
Now you have chosen a base profile using MPT, we can setup some profiles in Radeon Software > GPU Tuning.
It's important to remember that we have set a power limit of 275W in MPT, default is 255W for the 6900 XT and what you see tested in reviews. So it is useless trying to overclock too much as we mainly want to under volt and stabilise clock frequency. My particular sample can maintain a core clock of 2400Mhz solid in most things with the profiles below.
I have two profiles in Radeon Software > GPU Tuning that i switch between depending on the game. If the game will utilise 250W or more power draw under extended load, then i go for Profile 1 which has a slightly higher fan speed. If the game i am playing has a power draw sub 250W under extended load then i go with profile 2 which uses even lower fan speeds. Both are silent on this cooler tbh.
Voltage in the RX 6000 series works slightly different from all other AMD GPUs I've used. Voltage now increases automatically, up to a maximum value of 1.175v, based off the Junction temperature. So, as the GPU heats up the voltage will go a notch higher. Basically, you start off with say 1.0000V, but by the time Junction reaches 100c, you may be at 1.025v. For the GPU Tuning profiles listed below, the voltage at 100c is 1.025v, down from the default 1.175v.
GPU Tuning Profile 1 - GPU Power Draw at 250W plus
2400Mhz/2100Mhz
1.025v (ignore what is set in Radeon Software it is not accurate )
GPU Tuning Profile 2 - GPU Power Draw Sub 250W or lower
2400Mhz/2000Mhz
1.025v (ignore what is set in Radeon Software it is not accurate )
Now, imagine the same profiles above but for 325W set in MPT. Basically add another 10-15% fan speed for each profile.
You will notice i don't touch the power limit slider, no need to if you set things up correctly in MPT. You can define the exact Watts you want your GPU using in MPT and i now prefer to use this than to touch the slider and calculate the increase of 15% of the value you set in MPT.
Here's a screenshot from GPU Tuning Profile 1 in game, showing the OSD i mentioned earlier using HWINFO64 and Rivatuner.
Hope this helps, should at least get you started into designing your own profiles based on your use case.
