I have a few questions as a new Vega 64 owner having spent the last 6 years or so with Nvidia cards that i'm hoping you guys can answer
I've been playing a lot of Farming Simulator 2017 (don't judge me!) and i'm finding that performance with my new Vega 64 is about the same (maybe even worse) that the GTX970 it replaced. I'm still getting stuttering and FPS drops and i dont know if it's just that the game itself runs badly in general or if it runs worse with AMD cards compared to Nvidia.
Having used Nvidia cards for a long time i'm used to setting fan curves in MSI Afterburner and i've tried to do the same with my Vega 64 and it seems that Radeon Settings overrides anything you set in Afterburner. Is there way i can set a custom fan curve as leaving Radeon Settings on default is producing some rather irritating spinning up and spinning down of the fans.
Like KentMan i've also never OC'd with Radeon Settings and i'm hesitant to try as i really dont know what i'm doing. I've read the overclocking guide linked in the OP of this thread but i think it was written around stock Vega 64 with lower clocks and voltage than my Sapphire Nitro+ so i'm not really sure where to start with my card.
Thanks a bunch.
Well first up I'd recommend grabbing OverdriveNTool just to make life a bit easier changing clocks, voltages and power targets. I personally don't like AB for Vega OC as it doesn't give proper P state editing. I do use it for the graph tracking of temps/perf though
A monitoring tool like HWiNFO64, the sensors on GPU-Z or Afterburner if it's stable for you and keeping an eye on active clocks, power draw (yes I know it's not 100% accurate, but useful for seeing when throttling occurs) and voltage (enable voltage monitoring not editing in Afterburner).
Grab a SoftPP table that works for your card. I use a 200% version for Power target instead of the stock 50% allowing unrestricted Power target's however it's going to allow higher heat generation, something to keep in mind. I also use a custom water loop, so can take the extra power without too much issue, the blower doesn't fare so well, though removing the power limit prevents power throttling which can cause stuttering.
How I do my OC is by keeping P7 on the max frequency (1750MHz in my case) and then adjust the voltage between 950mv and 1250mv to determine a range which keeps the wattage low enough under heavy load and still gives good performance. For air I was using ~1100mv to keep heat build up low enough and keep performance high. For higher ambient temps I dropped it to 1050mv.
HBM should be able to reach 1100MHz, this is highly dependent on card though so I'd lower the core MHz to 1630MHz and test HBM up and up with Superposition (seems to be the first to react to HBM artifacts) and edge up to the point which it stays stable for you without artifacts. For me they show up as green splotches randomly on the screen. If I run 1180MHz and the temps breach 53C then I tend to see them. If they stay below 53C I don't see them during the run. So there's definitely temperature affecting issues with HBM. Keep in mind while I can bench with 1180MHz, I run 1100MHz normally.
OverdriveNTool also allows profiles to be saved. I have a few different ones for Benching and gaming. Also have a low power desktop profile. When Benching and Gaming I disable all power states below max to prevent stutters and drops in performance. Very easy to do with the tool vs Wattman and doesn't have the error of not applying that I find Wattman had, though I haven't used Wattman for months so it may have been fixed since I last used it.
For me a good base for the Blower was:
Core 1750Mhz @ 1050mv
HBM 1050MHz with 950mv on the HBM setting (it's min voltage for the card as far as we know, the BIOS sets a static HBM voltage that's not editable).
Power Target +200%
Disable the all P states other than P7 Core and P3 HBM for gaming and benching.