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The RX Vega 64 Owners Thread

So after testing I settled on what I thought was a stable UV and OC at p61000mv,p71100mv and HBM 1100mhz but These settings would cause artifacts so I backed down to 1080mhz on HBM . Still I get crashes in Subnautica so now im running my older OC profile of p61100,p71160 and HBM 1000mhz. Again am I missing something or is my HBM just bad at overclocking?
 
Ebrahim Ali said:
So after testing I settled on what I thought was a stable UV and OC at p61000mv,p71100mv and HBM 1100mhz but These settings would cause artifacts so I backed down to 1080mhz on HBM . Still I get crashes in Subnautica so now im running my older OC profile of p61100,p71160 and HBM 1000mhz. Again am I missing something or is my HBM just bad at overclocking?
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Could probably push it to 1050MHz, though as you are going for performance at 1100MHz I'd keep the HBM mv at 1050mv or 1100mv and lock out the other P States. When gaming I literally run this:

unknown.png
 
Dempsey22 said:
I dont think its my PSU, its not even a year old and its a Seasonic Focus Plus 850W. Everything was working perfectly until recently. The fan doesnt even come on as I'm never pushing the PSU hard.

I might replace the PCIE riser cable but if @HEADRAT is plugged directly to the mobo then it wouldn't make sense for it to be that.

EDIT: Also, I could game for 12 hours straight and no issues, but tomorrow the display driver could be crashing every 10 mins :/
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This was happening 6 or 7 months back for some people, On that occasion it turned out it was a driver issue so that's worth looking in to, roll back the driver & see if still happens.
I also suffered with the same problem 3 or 4 months back (around when Strange Brigade launched) One day I would boot Strange Brigade up and spend 5 or 6 hours playing it without issue and then the next it would keep crashing even though I hadn't changed anything. I eventually found that increasing my undervolt by 10mv stopped it from happening. It was a strange one.

I ought to point out that I'm also running an 860 watt Seasonic platinum psu but I don't think that's the problem as the 10mv voltage increase fixed it for me, that said I have read about an issue with some of Seasonics psu's recently, I don't think it's an issue with my particular model.

I'm using this psu.

 
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HEADRAT said:
Everything is stock but I'm constantly getting hard reboots in DOOM 2016, I've DDU drivers and not even enabled WattMan (fresh install of Win 10 1809) and 19.1.2 Adrenalin drivers:

watt_zpsbympszol.png


but after the reboot I get:

vega_zpsivn6qdp8.png


I'm not sure how WattMan settings have been restored when it's not even enabled!

I have a feeling it'a actually something to do with the fresh install of Win10, something isn't getting loaded properly that's there if you're on an old install (maybe a driver or C++ redist pack or etc).

I'm tempted to find an older build of Win10 and try that.
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Wattman is a part of the driver package you install whether you use it or not so if anything goes squirly it defaults to Wattman to fix it. I always thought it was a bad idea adding so many semi-unrelated features to the base driver package but they've done well keeping on top of things, I've also been converted to the importance of reporting bugs rather than saying to myself that I'm sure someone else will report it. Over the last year I must have put the equivalent to one report in every two weeks as I've come to believe that they genuinely help get issues on the driver teams radar which leads to shorter wait times for fixes.

You need to use Wattman with Vega as the card's got a lot to offer beyond how it comes out of the box.
 
OK but I've never had a problem until recently, what P6/P7 mv setting should I be using, I've increased Power Limit slider to 50% (I've got a Gigabyte AMD Radeon RX Vega 64 8GB HBM2 Liquid Cooled (GV-RXVEGA64X W-8GD-B))
 
Panos said:
Nitro is kinda peculiar with power settings. Any bellow 1080mv on P7 and goes down a lot.
Also the "memory" power setting has nothing to do with the memory. Is the floor core voltage and should be kept at default (950mv-1000mv)
You need also to raise the Power Limit to +20- +30% if not +50%. It will improve clocks.
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Cheers. I had the power limit at 50%.
The 1000mv P7 setting is for quiet.
There's not much difference, performance-wise, between running at a steady 1575mhz at 1000mv or at around 1615 mhz at 1100mv - 6741 vs 6871 in superposition 4k optimised.
If I up P7 to 1682, it runs at around 1635mhz, but lacks stability. Raising P7 to 1150mv doesn't help.
 
stuartharrison said:
Is that with a liquid bios Trixx?
What kind of steady mhz do you get with P7 set at 1752 and what card is that?
Cheers.
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It's with the LC BIOS 8774 and I get around ~1670MHz under load with that setup. At 1175mv I get a steady ~1700MHz under load in most games with 99% GPU load.

Card is an HIS Vega64 reference card with a moulded Vega64 core and Samsung memory. Running an Aquacomputer water block.
 
HEADRAT said:
OK so I've gone in to WattMan and set "custom"

g1_zpszuzqoss8.png


g2_zpsrjtqqkyk.png


Keeping in conservative on mem for now
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You can right click on the slider for P7 and set as Minimum State. That will lock off the other P States. Same can be done for memory but locking it to 800MHz won't help you solve what speeds it can run at. At minimum it should manage 945 in P3. So do a Superposition Heaven run with the settings adjusted to 945MHz on the memory and see what happens. I say Superposition as if it has issues with memory it tends to show via green artifacts on screen and not crash immediately. Allowing a clean exit of it and adjustment to suit.

When gaming I would really suggest locking to P7 as it prevents any stuttering caused by P State switches which is pretty game dependent on whether it happens or not.

Personally I use OverdriveNTool as it's got all the settings on a simple and quick to use UI. It's doing the same thing as Wattman so nothing odd or out of the ordinary ;)
 
OK I set some really low setting just to see if I could get through HEAVEN without a crash

Frequency = 1507 with 1150 mv (locked P7)
Mem = 850 with 1000 mv (locked P3)

Crash after about 50 seconds
 
Keep frequency high, not low. The ACG (Advanced Clock Generator) will manage the frequency based off voltage, power draw and temps. Stock is 1200mv for P7 and 950mv for the HBM setting (should equal P State 5 on the Frequency IIRC) so I'd revert those to stock and run 1600MHz core and 945MHz mem to do a test.

Also please try testing in Superposition. It could be just a Heaven issue currently. Both are Unigine so would help with troubleshooting.
 
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