Serious performance issues [AMD Build]

[MissileMoose]

Hi Guys,

I've just been on the phone with OcUK technical support regarding some performance issues, the kind gentleman suggested that I post here as he was baffled . I'm getting very poor frame rates in the flight simulation DCS: A-10C. My frame rates are on average around 7-15 on the ground and 15-25 in the air. Rexehuk who is a member here, gets much higher FPS than I do even with his single Radeon HD 5850 with the same settings.

My Current Setup:

AMD Phenom II X6 1090t @ 3.20GHz
ASUS Crosshair IV Formula 890FX
XFX Radeon HD 6870 CrossfireX (2)
G.Skill RipJaw 2x2GB 1600MHz
XFX Pro 750w

I'm also running Windows 7 and DCS: A-10C from a Crucial M4 SSD with the latest firmware (0009).

I built the PC around a year ago now, all components from OcUK. I've only just noticed the bad performance and tried to act on it in the last month or so, as I've not played DCS before. The only other game I play is ArmA 2, where bad performance is most always present for me. I just took it on the chin and assumed that it was the developers problem.

Everything is up-to-date, I updated my BIOS yesterday to the latest non-beta for my motherboard. Finally, I'm running Windows 7 64 bit and have done three fresh installs in less than a week.

Any and all suggestions are appreciated greatly. The tech guy and Rexehuk have both suggested that I test each GPU one by one. I'm about to install Heaven, so I'll get post my results.

DCS: A-10C Settings:
http://i51.tinypic.com/j981tf.jpg


DCS Benchmark:
Crossfire Enabled:
Frames, Time (ms), Min, Max, Avg
6237, 328445, 12, 67, 18.989

Crossfire Disabled:
Frames, Time (ms), Min, Max, Avg
8637, 294047, 19, 94, 29.373

Edit: ^^ Problem solved I think, why didn't I think of that sooner. What about the error, I've been having issues with that lately. I made a post on the DCS forum but nobody really knows. Sometimes it crashes and sometimes it doesn't. At one point I must mention that the sim was unplayable through crashing in the menu. Here's the topic: http://forums.eagle.ru/showthread.php?t=79324. Thanks again!


Thanks!
Moose

 

[Reaper 392]

try reinstalling the graphics drivers. i've no idea why but my PC just doesnt keep its graphics driver installs so you might have the same problems. i could fix that with a windows reinstall but i cba

*edit*
ooh, just noticed your doing a flight sim on crossfire. try using a single card or turning crossfire off somehow because i dont think flight sims support crossfire yet (happy to be proved wrong here though)

 

[Tomcat825]

Possibly negative crossfire scaling?

 

[reflux]

Sounds like it could be CrossFire to me.

 

[MissileMoose]

@Tomcat825, reflux, Reaper 392

I'll go ahead and do a benchmark with it enabled and disabled. Results in around 10 minutes.

Thanks!

I just went to start DCS up and I crashed to desktop, Windows 7 said that the program had stopped working. This is the report given:

Problem signature:
Problem Event Name: APPCRASH
Application Name: Launcher.exe_DCS: A-10C WARTHOG
Application Version: 1.1.0.9
Application Timestamp: 4e2747d6
Fault Module Name: atiumd6a.dll
Fault Module Version: 8.14.10.321
Fault Module Timestamp: 4e31d081
Exception Code: c0000005
Exception Offset: 0000000000001b37
OS Version: 6.1.7600.2.0.0.768.3
Locale ID: 2057
Additional Information 1: 5172
Additional Information 2: 51721b4a3d2d7e68681ee21c15ffbc77
Additional Information 3: ef4d
Additional Information 4: ef4d82a145f3694304a9f5016acbac89

Read our privacy statement online:
http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409

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C:\Windows\system32\en-US\erofflps.txt

# -------------- 20110916-161050 --------------
C:\Windows\system32\atiumd6a.dll
# C0000005 ACCESS_VIOLATION at 693C1B37 01:00000B37
00000000 00000000 0000:00000000

Any ideas?