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Asus Platinum HD7970 Matrix OC issues

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Processor i7 6900k @ 4.3GHZ
Motherboard MSI X99A Godlike Gaming Carbon
Cooling CPU/GPU loop with 480mm and 360mm radiators
Memory 32GB Corsair Dominator 3000MHz C15
Video Card(s) 2x EVGA 1080 SC ACX @ 1830/1330
Storage Samsung 950 Pro M.2 512GB, WD 2TB Black HDD
Case Corsair 900D
Power Supply EVGA 850W Gold 80 plus PSU
Software Windows 10 Pro
#1
The two graphics cards that I have in my system are:
Asus Platinum HD7970 Matrix 1100/1650 3GB - Stock core voltage of 1257mv
XFX Radeon HD7970 925/1375 3GB - Stock core voltage of 1170mv

Other system specs:
i7 3770k OC @ 4.7Ghz (Confirmed stable)
32Gb DDR3 RAM 2400Mhz
128GB Samsung 840 Pro SSD
1TB Caviar Black WD HDD
Asus Maximus V Formula eATX Motherboard

My drivers are up to date and my temps during the tests are normal.

I decided that I was going to see how far i could push my GPU's on stock voltage. I started with the XFX card and was able to reach 1100/1525 at stock voltage. To confirm stability I ran and monitored a 10 minute Furmark 1080P Burn-in test and saw no problems at all.

I then moved on to the Asus card. I started with the memory and was able to clock it at 1750 with no issues. When I started with something i deemed reasonable; 1200Mhz. The second I opened Furmark it crashed. I had to lower the core clock to 1170Mhz before I could even open Furmark. When I ran a Burn-in test I immediately got artifacts. I continued to drop the core clock and yet continued to get artifacts until I reached 1155Mhz. So I said "OK" and decided to try and push 1155Mhz with an increased voltage. No matter how high I increased the voltage the clock was not stable >1155. I've spent several hours doing research and trying to find the right combination of the two and have had no success.

If anyone has any suggestions on how I may be able to push 1155Mhz, I would really appreciate it. :)
 

cadaveca

My name is Dave
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#2
Voltage tweaking doesn't work on ASUS CUII and Matrix VGAs without Maximus V Extreme board, it seems(you need to plug cards into board and let board adjust voltages).
 
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Processor 7900
Motherboard Rampage Apex
Cooling H115i
Memory 64GB TridentZ 3200 14-14-14-34-1T
Video Card(s) Fury X
Case Corsair 740
Audio Device(s) 8ch LPCM via HDMI to Yamaha Z7 Receiver
Power Supply Corsair AX860
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#3
Are you using asus gpu tweak to overclock? My Matrix card will do 1200/1750 on stock voltages.
 
Joined
Dec 5, 2012
Messages
525 (0.28/day)
Likes
39
Processor i7 6900k @ 4.3GHZ
Motherboard MSI X99A Godlike Gaming Carbon
Cooling CPU/GPU loop with 480mm and 360mm radiators
Memory 32GB Corsair Dominator 3000MHz C15
Video Card(s) 2x EVGA 1080 SC ACX @ 1830/1330
Storage Samsung 950 Pro M.2 512GB, WD 2TB Black HDD
Case Corsair 900D
Power Supply EVGA 850W Gold 80 plus PSU
Software Windows 10 Pro
#4
Are you using asus gpu tweak to overclock? My Matrix card will do 1200/1750 on stock voltages.
Yeah i am using Asus GPU tweak. I was able to clock my memory to 1750 but as i said, it won't go past 1150 :\ It doesn't really matter, it's only for the sake of benchmarks.