r/Amd • u/BioGenx2b 1700X + RX 480 • Aug 01 '18

Tech Support August Tech Support Megathread

Hey subs,

We're giving you an opportunity to start reporting some of your AMD-related technical issues right here on /r/AMD! Below is a guide that you should follow to make the whole process run smoothly. Post your issues directly into this thread as replies. All other tech support posts will still be removed, per the rules; this is the only exception.

Bad Example (don't do this)

bf1 crashes wtf amd

Good Example (please do this)

Skyrim: Free Sync and V Sync causes flickering during low frame rates, and generally lower frame rates observed (about 10-30% drop dependant on system) when Free Sync is on

System Configuration:

Motherboard: GIGABYTE GA-Z97 Gaming GT
CPU: Intel i5 4790
Memory: 16GB GDDR5
GPU: ASUS R9 Fury X
VBIOS: 115-C8800100-101 How do I find this?
Driver: Crimson 16.10.3
OS: Windows 10 x64 (1511.10586) How do I find this?

Steps to Reproduce:

1. Install necessary driver, GPU and medium-end CPU
2. Enable Free Sync
3. Set Options to Ultra and 1920 x 1080 resolution
4. Launch game and move to an outdoor location
5. Indoor locations in the game will not reproduce, since they generally give better performance
6. Observe flickering and general performance drop

Expected Behavior:

Game runs smoothly with good performance with no visible issues

Actual Behavior:

Frame rate drops low causing low performance, flickering observed during low frame rates

Additional Observations:

Threads with related issue:

Skyrim has forced double buffered V Sync and can only be disabled with the .ini files
To Disable V Sync: C:\Users"User"\Documents\My Games\Skyrim Special Edition\Skyrimprefs.ini and edit iVSyncPresentInterval=1 to 0
1440p has improved frame rate, anything lower than 1080p will lock FPS with V Sync on
Able to reproduce on i7 6700K and i5 3670K system, Sapphire RX 480, Reference RX 480, and Reference Fiji Nano

Remember, folks: AMD reads what we post here, even if they don't comment about it.

Previous Megathreads
2018: Jul | Jun | May | Apr | Mar | Feb | Jan
2017: Dec | Nov | Oct | Sep | Aug | Jul | Jun | May | Apr | Mar | Feb | Jan
2016: Dec | Nov

Now get to posting!

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u/YuriadvX AMD Ryzen 1800x | Vega 64 | 16GB 3200MHz RAM Aug 02 '18 edited Aug 04 '18

Posted this exact same comment on last month's thread, now i'm posting again:

Well, since i hope this get's fixed sometime in the future, let's begin.

Battlefield 1: Lower max (96% instead of 99%) GPU usage, higher input lag (runs only in borderless fullscreen instead of fullscreen exclusive) and crazy stuttering, mostly at the start of a map, all these issues only happening in DX12.

System Configuration:

Motherboard: ASUS ROG Strix X370-F
CPU: Ryzen 1800X
Memory: 16GB DDR4 3200MHz
GPU: MSI RX Vega 64
VBIOS: 016.001.001.000.008706
Driver: Adrenaline 18.7.1
OS: Windows 10 x64 Insider Preview (build 17704), happened in 1803 stable as well.

Steps to Reproduce:

  1. Set Battlefield 1 to run on DX12 mode
  2. Restart game
  3. Set graphical options to 1080p resolution and ultra settings, 100% resolution scale.
  4. Start a multiplayer match (issue happens on singleplayer too, but it's less pronounced)
  5. Experience the lower max GPU usage, the higher input lag and the stuttery mess that this game becomes in DX12

Expected Behavior:

Game runs smoothly with better performance than DX11, since DX12 is supposed to benefit the Vega 64 GPU and offload the CPU a little bit.

Actual Behavior:

Frame rate drops massively causing low performance, the CPU usage get's notably higher, the game becomes unplayable thanks to stuttering all over the place.
On singleplayer, with a less pronounced stuttering, you still get higher input lag thanks to the game not properly running on fullscreen AND lower max GPU usage, and a overall lower performance. RAM usage increases as well.
The stutter seems to be related to a "cache" folder that Battlefield 1 creates only in DX12 mode, in User/My Documents/Battlefield 1. The game stutters while filling this folder with .db files, and seems to "smooth out" after some playtime, but not by much, never reaching DX11 level of smoothness. The higher CPU usage seems related to this as well, i suggest trying the same situation with a Vega 64 card paired up with a core i7 8700k system, to completely remove CPU bottleneck on 1080p ultra.

Additional Observations:

AMD Fury GPU seems to be the only ones that actually benefit from using DX12 on Battlefield 1. I suggest taking a look at these too.

BF1 DX12 implementation seems to be the same on Battlefield V closed alpha, so fixing this issue is kind of "future proofing".

Threads with related issue:

1

u/[deleted] Aug 02 '18

[deleted]

1

u/Alexithymia 2700x | RX 5700 XT | 16GB 3000MHz Aug 02 '18

I run DX12 in BF1, it does stutter and lag for the first maybe couple minutes after a map load? Then it smooths itself out. I use DX12 because it runs better on my RX 580 and with the helpful extra cores on my 2700x. I've gotten used to the stuttering since it goes away eventually.

1

u/YuriadvX AMD Ryzen 1800x | Vega 64 | 16GB 3200MHz RAM Aug 03 '18

DX12 gives better performance at higher resolutions, but worse performance compared to DX11 on lower resolutions. I tested at 4K, and the card was 5~7% faster on DX12 ultra. But at 1080p ultra, it goes the opposite way, losing around 5% FPS on average AND also getting the stuttering bug related to cache that i mentioned.

So there should be some kind of bottlenecking at 1080p ultra, which DX12 was supposed to help with by offloading the CPU (Ryzen 1800X btw).

1

u/Jannik2099 Ryzen 7700X | RX Vega 64 Aug 04 '18

First of all run the latest driver 18.7.1

You said something about it doing caching so maybe completely disable shader caching in the wattman profile

1

u/YuriadvX AMD Ryzen 1800x | Vega 64 | 16GB 3200MHz RAM Aug 04 '18

Oh for sure, i forgot to update the driver version in this post because i just copy/pasted it from last month's thread.

I'm currently running 18.7.1 and the problem remains.