AMD Radeon RX 7900 XTX undervolt test.

[Thinder]

Setting done in AMD Software Adrenalin Edition. Previous settings were stock.

Test: 3DMark Pro 4K MSAA X 2.

This loss of performance for the GPU in Physics Test should be recoverable using the same method for my 7 5800X 3D, in any case, if the application/game is more CPU heavy, not using under-voltage for the GPU would be the the best option.

I didn't touch the VRAM settings but it should be equally possible to boost its performance a little, during the test the temperature stayed around 70°C.

Fly like Maine Yaks...

[Thinder]

Now with more moderate settings in DCS, it looks smooth and I realize that my limitation in VR is my Pico4, refresh rate is too low at low altitude for the terrain to look that smooth.

 

[Thinder]

Enabling Smart Access Memory in BIOS, same settings than the previous test in 3DMark Pro. 4K MSAA X2.

Here we go: I recovered the loss of CPU performances experienced during the previous test in Physics test simply by enabling Smart Access Memory in BIOS, a net gain of 67.348%.

It takes a lot of work to fine tune an AMD system (I don't know about Intel systems), but they have a lot of hidden potential from stock.

A bit of advise. Check that your Automatic Update isn't playing havoc with your drivers, I had a message from AMD through AMD Software Adrenalin saying the Windows update may have replaced their driver by a Microsoft one.

 

So, from stock settings, fine tuning allowed me to gain 48.380% in Graphic Test 1 FPS, 14.368% in Graphic Test 2 FPS, 59.927% in Physics Test FPS, 12.550% in Combined Test FPS, all of this at 4K MSAA 2.

The whole system runs faster, smoother and temperature remains in the low 70°C during tests, 56°C right now with Streaming Assistant and Steam VR Beta ON.

I'm gonna go for a flight test in DCS with some harder settings.

Fly like Maineyaks...

Edited January 22, 2023 by Thinder

[SkateZilla]

It takes a lot of work to tune any system , AMD, Intel, nVidia regardless.
Even Pre-builts from stores, often have the wrong bios settings.

SMA w/ an 3D V-Cache CPU will also show huge improvements.

 

 

Often the "Horrible Performance on a xxxxxxxxxxx GPU" threads are due to mis-configuration of the settings.

[Thinder]

1 minute ago, SkateZilla said:

It takes a lot of work to tune any system , AMD, Intel, nVidia regardless.
Even Pre-builts from stores, often have the wrong bios settings.

SMA w/ an 3D V-Cache CPU will also show huge improvements.

 

 

Often the "Horrible Performance on a xxxxxxxxxxx GPU" threads are due to mis-configuration of the settings.

I agree, figured the last thing I've done was the simplest, Smart Access Memory really boosted performances.

[whisky.actual]

Very interesting, did you manage to use reproduction at all? On my rig I can't use it because of poor performances

[Thinder]

42 minutes ago, whisky.actual said:

Very interesting, did you manage to use reproduction at all? On my rig I can't use it because of poor performances

I was unable to reproduce those settings and performance since the DCS update, so all I got left for my trouble are those videos and one even better of the best run I had with this rig.

There seems to be also a driver issue with AMD, possible loss of performances after a while, don't really know where it comes from but basically, I recovered the PCI_E1 slot with some help from MSI tech support and ran a test with it, since I lost in frame rate and 3DMark score using the very same settings, no clue why.

My guess would be file corruption and/or virtual memory starting to be cluttered after Windows have been running for a while (5.5GB right now), I'll check my O.S settings to make sure it cleans temps in a regular basis and short intervals.

The thing is, I know the real potential of this PC but can't get the performances in both testing and DCS more than once, mainly after a change of gear setting like the PCI slots or a fresh O.S install.

I got no reply from Sapphire, AMD or Pico on the subject. On a positive note, it's still early day for those 7900 and I know AMD aren't staying idle with drivers development, in theory, if they don't fo@ck this up, it only can get better.

To reply to your question more specifically, I have no idea what reproduction is, I start with Open XR tool, then Pico's Streaming Assistant, at which point Steam VR kicks-in, then I open Virtual Desktop. That's a lot of peripheral apps for a headset...

[whisky.actual]

2 hours ago, Thinder said:

I was unable to reproduce those settings and performance since the DCS update, so all I got left for my trouble are those videos and one even better of the best run I had with this rig.

There seems to be also a driver issue with AMD, possible loss of performances after a while, don't really know where it comes from but basically, I recovered the PCI_E1 slot with some help from MSI tech support and ran a test with it, since I lost in frame rate and 3DMark score using the very same settings, no clue why.

My guess would be file corruption and/or virtual memory starting to be cluttered after Windows have been running for a while (5.5GB right now), I'll check my O.S settings to make sure it cleans temps in a regular basis and short intervals.

The thing is, I know the real potential of this PC but can't get the performances in both testing and DCS more than once, mainly after a change of gear setting like the PCI slots or a fresh O.S install.

I got no reply from Sapphire, AMD or Pico on the subject. On a positive note, it's still early day for those 7900 and I know AMD aren't staying idle with drivers development, in theory, if they don't fo@ck this up, it only can get better.

To reply to your question more specifically, I have no idea what reproduction is, I start with Open XR tool, then Pico's Streaming Assistant, at which point Steam VR kicks-in, then I open Virtual Desktop. That's a lot of peripheral apps for a headset...

Reprojection, dam automatic correct! I also have a Sapphire card, will post my full specs in a subsequent post, maybe we can figure out something together, do you also fly in IL2 so we can see if this issue is only in DCS?

[Thinder]

28 minutes ago, whisky.actual said:

Reprojection, dam automatic correct! I also have a Sapphire card, will post my full specs in a subsequent post, maybe we can figure out something together,

We can try, it would be interesting to know if AMD drivers can be at the root of the issues or contribute to them, or not, but from my experience, my system has way more potential than I can use right now, I saw what it could do even so it lasted only one day before DCS update, btw I have figured Steam VR is more stable when selected as default.

Quote

do you also fly in IL2 so we can see if this issue is only in DCS?

No. DCS is my only game at the moment, before I start installing more than the strict minimum I need to sort out system, O.S and apps.

A couple of days ago I still had my GPU running on CPI_E2 in degraded mode because the CPI_E1 slot wouldn't recognize the card, BIOS settings sorted this one out but I needed the help of MSI support.

Write your detailed specs in your signature, this way it is easier for people to figure a possible solution to your problems.

 

[whisky.actual]

Here are my current under volt settings. I did not touch my CPU. I've started using the native OpenXR for DCS.

Few more items:

• DCS OB 2.8.2.35759
• Headset is the Samsung HMD Odyssey + (1440x1600 per-eye)
• AMD Smart Memory enable (resizable bar)
• OpenXR Tools latest preview on + Customized render scale @ 100%
• AMD drivers 23.1.1
• Adrenalin Edition with Radeon Anti-lag, more tweaking to be done
• Test mission is the F-18 Ramp Start, on the ground I get around 45 FPS and in the Air I can get up to 50 FPS.

Here is my Rig:

DCS settings:

OpenXR settings:

null

 

Edited February 2, 2023 by whisky.actual

[Thinder]

4 hours ago, whisky.actual said:

Here are my current under volt settings. I did not touch my CPU:

 

Here is my Rig:

 

DCS settings:

 

OpenXR settings:

TBD

More information to come.

 

 

 

We have very similar Performance/Tuning settings, the performance hit I experience is mainly in the Pico's view, because the replays doesn't reflect this at all, no fogging, cycling of image clarity and much higher details levels...

I also used Anti-Lag and Image sharpening and plays with the Pixel Density in DCS, which seems to affect the FPS the most of all settings.

>>>

As I expected, the FPS recorded for Steam is mediocre, while the GPU is refreshing properly, there is a clear bottleneck there with this App, it seems to be limiting the quality and smoothness of what I get in the Pico, I'm gonna try to set up Afterburner overlay in game so I can check the FPS...

 

Edited February 1, 2023 by Thinder