AMD CrossFireX Problems

[Captain Orso]

I am not sure if it applies but it may be worth to try as some other thread(s) have brought that topic up too and it seemed to help syncing in general...and stutter with such machines is not lack of ooomps but a not so well adjusted "underneath" for whatever reason.

 

I tested that setting despite I have no issues but it boosted Wn10 startup and general performance.

 

The thing is called HPET HighPrecisionEventTimer and there is a LOT to it, so you better read first, decide if it may apply...and then fumble with it on your machine.

 

The link to get some good info: http://forums.anandtech.com/showthread.php?t=2362109

 

 

As AMD CF works through PCI-E lanes, this may very well apply at the very core of the damn problem...maybe !

 

 

Bit

 

I did this too. One odd thing about doing this, in the Anandtech description it states that the HPET entry in the Device Manager should not appear, if HPET is disabled in the BIOS, however I still see it and DM says that it's working normally.

 

Aside from the fact that I'm only running 1 monitor (2560x1440), compared to Juris's rig (5680x2160 :shocking:) I also am running on a completely different CPU [i7-5820k (3.8GHz) vs i7-4790k (4.4GHz)] and my graphics card is not installed in the suggested slot (PCI_E1 x16 lanes) but rather (PCI_E4 x8 lanes) because my big, fat, Noctua D15 CPU cooler blocks that slot for me :(. So there are 2 possible culprits working against me.

 

I can replace the CPU cooler for something smaller (water cooling) to open up the PCI_E1 slot, but I'm still not sure if that's really my issue.

 

I could start delving into OC'ing my CPU, which from what I've read should be very possible with my i7-5820k, but I have my doubts that I might reach 4.4GHz, and OC'ing already calls for better cooling, ergo replace the Noctua with water cooling, free up the PCI_E1 slot...

 

There are so many possibilities. The question is, where to start, and where to end?

[Decibel dB]

Well if I have both gpu's running (crossfire) I have freeze frame and massive shutters. If only one is running model vis work but I have small shutters. I suspect you only have one of your gpu running

[Captain Orso]

No, I definitely have both running after I've pressed <LCtrl><Enter>. The Crossfile logo appears in the upper right corner, and if I have AfterBurner running the over lay shows both GPU's clocked at 1018GHz.

 

Edit: The key combination is of course <LAlt><Enter>

Edited October 28, 2015 by Captain Orso
Correction

[Punisher74]

No, I definitely have both running after I've pressed <LCtrl><Enter>. The Crossfile logo appears in the upper right corner, and if I have AfterBurner running the over lay shows both GPU's clocked at 1018GHz.

 

 

I know this is not really a major issue but do you see a difference in the Font, after hitting LALT + ENTER. Seems a little out of focus when CF is running at full speeds?

[Captain Orso]

In CF mode the GPU's are practically never going to 100% other than for a second or so. But if you tell me exactly which text you are referring to I will check what I see.

[Punisher74]

In CF mode the GPU's are practically never going to 100% other than for a second or so. But if you tell me exactly which text you are referring to I will check what I see.

 

Any text, the HUD, FPS counter, mission file names, any of the menu options on main page or radio menu. It looks like when CF is enable fully the text holds and then the extra thick font blurs out.

[Captain Orso]

I don't see any difference. The text below the FPS text is from AfterBurner.

 

Text in Crossfire mode

 

Text in single GPU mode

[theGozr]

Any solution for the Stutters? which profile are you guys using ? using rof.exe profile which run great but stutters/ well pauses a lot

[SkateZilla]

I don't see any difference. The text below the FPS text is from AfterBurner.

 

Text in Crossfire mode

 

Text in single GPU mode

 

 

Turn off anything limiting the Frame Rate to 60 FPS, Do Not use AFR Modes

Edited December 8, 2015 by SkateZilla

[Decibel dB]

Hi Skate, for me with 1.5.1.47285. I confirm that it's with xfire on "Alt+Enter" that I have the shutter only when the Model visibility is engage (not to off). Shutter is a big word I will call it more like frame freeze or skip. As for 2.0 there a little improvement but still one frame freeze every 10 second.

 

I rolled back my driver from Crimson to Catalyst 15.7.1 and even try window 10 but back at window 7

 

Here are my specs:

 

Operating System

Windows 7 Home Premium 64-bit SP1

CPU

Intel Core i7 4930K @ 3.40GHz 28 °C

Ivy Bridge-E 22nm Technology

RAM

16.0GB DDR3 @ 667MHz (9-9-9-24)

Motherboard

ASUSTeK COMPUTER INC. RAMPAGE IV BLACK EDITION (LGA2011) 31 °C

Graphics

BenQ XL2411T (1080x1920@60Hz)

PHL BDM4065 (3840x2160@60Hz)

4096MB ATI AMD Radeon R9 200 Series (ATI) 54 °C

4096MB ATI AMD Radeon R9 200 Series (ATI) 47 °C

CrossFire Disabled

Storage

931GB Samsung SSD 840 EVO 1TB SCSI Disk Device (SSD) 32 °C

2794GB Seagate ST3000DM 001-1CH166 SCSI Disk Device (SATA) 27 °C

3726GB Seagate ST4000DM 000-1F2168 SCSI Disk Device (SATA) 26 °C

1863GB Hitachi HDS723020BLA642 SCSI Disk Device (SATA) 29 °C

Optical Drives

HL-DT-ST DVDRAM GH24NSB0 SCSI CdRom Device

[theGozr]

Changing to visibility range to High took off the stutters..

[DayGlow]

Any one else able to confirm that CF issues seem to be resolved? Latest AMD drivers in seeing 90%-100% usage across both cards and even with model visibility on no stutter. :)

 

Now just waiting on the Gui fix for multi monitors

[Captain Orso]

I'm sure everybody here knows that AMD does not have a per-configured profile for DCS.

 

If you would like AMD to provide such a profile, I would suggest lending your voice to this thread in the AMD forum: https://community.amd.com/message/2693166#2693166

 

Maybe with enough voices we'll be heard finally :smilewink:

[pepin1234]

I remember I test my crossfire performance with DCS time ago. Now I try run crossfire using LAlt-Enter and seem crossfire is not active anymore. Any idea?

[Pappen]

You could try making a profile for DCS and try the different option for crossfire... if I remember correct its different for 1.5 and 2.0.

[C6_Hellfrog]

I do have 2 radeon r980 xfire + 3 x1980x1020 = 5760x1080

 

with ALt Enter is OK in 202

but no export working unless you stay windowed and then no xfire and bad fps

 

no way in 153 for xfire

but export working and windowed ok

fps inferior greatly than in 202, have to reduce graphics options or reduce resolution

 

therefore have to make a choice between exports, fps, xfire and version you use...

[Psicodreamics]

I have downloaded and installed the 16.4.1 drivers of my two AMD R9-390 and NOW the crossfire doesn't works. With the 15.3 drivers it worked fine. Could you fix it?

[gantus]

Hi there,

 

Anyone knows some useful crossfire settings in crimson or in dcs? Don't hesitate and write here, please.

 

I need help because my crossfire configuration works nearly well with almost double fps, minor microstuttering but the sky is always flashing.

 

I use latest driver, cf mode set AFR friendly, model visibility set off and fullscreen (alt+enter), medium settings.

 

What about 2.0, same?

[Polo]

Hi there,

 

Anyone knows some useful crossfire settings in crimson or in dcs? Don't hesitate and write here, please.

 

I need help because my crossfire configuration works nearly well with almost double fps, minor microstuttering but the sky is always flashing.

 

I use latest driver, cf mode set AFR friendly, model visibility set off and fullscreen (alt+enter), medium settings.

 

What about 2.0, same?

 

So far running TriFire (Crossfire 3x7970s) fairly well in DCS World (both 1.5 and 2.0). Using the 'AFR Compatible' CrossfireX profile seems to resolve most of the flickering. Model visibility needs to be off and am using the latest 17.1.1 Crimson ReLive drivers.

 

What I have found has an impact is to have Cockpit mirrors ON...I'm seeing FPS jump from 45 - 80 when toggling the mirrors back on in some cases. This is running 5760x1200, 512 every frame for textures. Turning Tesselation Mode in the Radeon settings to 'Use application settings' might have helped. I'm using the Medium preset settings in DCS World.

[gantus]

Thanks for your reply. I tried your solution but unfortunately doesn't work for me. However with AFR compatible setting less flickering so fps worse than with one card w/o mirrors medium settings also. I guess a specific amd cf profile would help or an eager ED coder.

[Polo]

Did you try with mirrors turned on? For some reason having mirrors on greatly increases my FPS. Counterintuitive I know...

[gantus]

Strange but you're right. 'Mirror on' has few fps better on your settings. I can see gpu1 and gpu2 are working but nothing huge improvement than single gpu. I guess cf is useless yet in dcs.

[gantus]

Hello there, Anyone has experience with 2.5 and crossfire?

[gantus]

I tried with two rx470, it has brought the same result than 1.5 :(

[C6_Hellfrog]

I stopped using DCS since 2 years because fed up with continuous update and mods maintenance and lack of time. But looking at 2.5 release to go again.

I have 3 screens 1920x1080 with crossfire 2 rx280

 

I had best results with 1.5 than 2.0.

 

So if you say 2.5 performs equivalent to 1.5 it means 2.5 is a progress relative to 2.0.

(Even if crossfire optimization is not good, relative to AMD drivers mainly)

 

Are you sure about that asset ?