New ROG Strix Vega 56 running slow

[Ellis McKinnon]

Hi, my first time on here looking for a bit of help.
I have a new build 8600K, MSI Mortar MB, 16GB Corsair 3200, Be Quiet 580 Gold PSU and Asus ROG Strix 56 Vega running Adrenaline 18.12.1.1 - no under volting or overclocking, simply standard.
Put it all together two weeks ago running Windows 10 64 primarily to run Battlefield 5 @ 1080p.
First run superb - 140fps constant on high settings and hitting - 100 - 120fps on Ultra.
Second time running the game I noticed that the FPS on high settings had dropped to 80 - 100fps and that the card was running much cooler! Strange! A change of divers to 18.12.2 caused the video settings to become unstable and gave a blank screen. Had to boot into the MB graphics to access the system and eventually ended up reformatting and installing windows 10 afresh. Installed 18.12.2 from fresh and hey presto! Back to 140fps on high settings again. Played BF5 for a couple of hours straight no issues.
Started up to play the following night and......back to the 80fps and the cool exhaust air from the system. Not changed any profiles, balanced was the original setting and not touched the switches on the side. The card has always been stable apart from this quirk.
I have no other third-party software installed apart from HW Monitor - it says the card is only hitting 60 degrees in the game whereas when it was motoring it was peaking at 80. What is going on? Is it pulling a cool and quiet profile from somewhere? What do I do to get it back to how it came out of the box?
Any help much appreciated.

 

[Ellis McKinnon]

Hi Guys, thanks for the replies and I realise that there is some detective work to do here to get to the bottom of the issue. No overclock on CPU or RAM. I'd rather not undervolt the card and just run stock.
BF5 @ 1080P on high settings should be well within the cards capabilities straight out of the box and especially as that is what it was achieving initially. Cheers

 

[Ellis McKinnon]

Some figs from GPU-Z/ BF5 Multiplayer - Amsterdam
Core Clock - 1520MHz
GPU Memory Clock - 800MHz
GPU Temp - 58 C
GPU Power Draw - 248 W
CPU Temp - 44 C
PCIe x16 3.0 @ x16 3.0

That's one cool, lazy Vega 56.

Something's got a grip of it.

Not tried the dual cable yet but that wattage should be well within the PSU limits.

 

[Ellis McKinnon]

Cheers Guys. Typo on the energy demand - it was actually pulling 184W. I've just never had a card which demands so much tuning to get the best out of. As it stands it's barely outperforming the MSI 970 it replaced at 1080p I've read about the 64 VRM issue but I think that the Vega 56 cooler has only fins over the VRM's and not a thermal pad attached to the cooler. I'm just perplexed as to why it would scream out of the box only to be hobbled somewhere down the line - twice!

 

[Ellis McKinnon]

2.16 ROG Version. Homework for tonight to read the thread

Gave this a watch - https://www.youtube.com/watch?v=ay34-gNFW8M

 

[Ellis McKinnon]

This is where it gets a bit silly as I'm just about back to normal - High 130+fps - Ultra 110+fps - no under-volting - 140fps constant on the small 32 player maps

What did I do? Followed this thread - https://www.reddit.com/r/Amd/comments/7hzxw9/major_performance_bugs_with_rx_vega_6456_here_are/

and disabled the fast startup - How this should quite make such a difference I do not know but I could tell as soon as I'd changed the setting and fired up the game just by the exhaust from the case.

I'll test it some more tonight and I will still undervolt the card at some point. I just couldn't get my head around why, on a fresh install, it would run so well then revert back to 970 performance levels after a couple of restarts.

Weird and must admit I was clutching at straws at this point.

Core Clock - 1568MHz
GPU Memory Clock - 800MHz
GPU Temp - 80 C
CPU Temp - 50 C

 

[Ellis McKinnon]

https://www.youtube.com/watch?v=E0YywksRWaM