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Just to share what I've been observing with the "power spikes" and HWINFO64. Spikes seem to occur every 5-6 polling intervals (time = 100ms)
V9 (Intensity 8 ):
Fury Nitro:
1110/550, -108mv, ~352 S/s;
GPU Core Current: AVG 153A, but spikes as high as 247A
GPU Core Power: AVG 173W, but spikes as high as 280W
1140/550, -12mv, ~360 S/s;
GPU Core Current: AVG 175A, but spikes as high as 310A
GPU Core Power: AVG 210W, but spikes as high as 370W
RX470 Nitro 8GB:
1300/2100, -100mv, ~223 S/s;
GPU Core Current: AVG 78A, but spikes as high as 126A
GPU Core Power: AVG 78.3W, but spikes as high as 126W
V8 (Intensity 4 ):
Fury Nitro:
1110/550, -108mv, ~300 S/s;
GPU Core Current: AVG 145A, but spikes as high as 192A
GPU Core Power: AVG 165W, but spikes as high as 218W
1140/550, -12mv, ~310 S/s;
GPU Core Current: AVG 180A, but spikes as high as 224A
GPU Core Power: AVG 207W, but spikes as high as 274W
RX470 Nitro 8GB:
1300/2100, -100mv, ~190 S/s;
GPU Core Current: AVG 75A, but spikes as high as 99A
GPU Core Power: AVG 74.5W, but spikes as high as 99.6W
V9 (Intensity 8 ):
Fury Nitro:
1110/550, -108mv, ~352 S/s;
GPU Core Current: AVG 153A, but spikes as high as 247A
GPU Core Power: AVG 173W, but spikes as high as 280W
1140/550, -12mv, ~360 S/s;
GPU Core Current: AVG 175A, but spikes as high as 310A
GPU Core Power: AVG 210W, but spikes as high as 370W
RX470 Nitro 8GB:
1300/2100, -100mv, ~223 S/s;
GPU Core Current: AVG 78A, but spikes as high as 126A
GPU Core Power: AVG 78.3W, but spikes as high as 126W
V8 (Intensity 4 ):
Fury Nitro:
1110/550, -108mv, ~300 S/s;
GPU Core Current: AVG 145A, but spikes as high as 192A
GPU Core Power: AVG 165W, but spikes as high as 218W
1140/550, -12mv, ~310 S/s;
GPU Core Current: AVG 180A, but spikes as high as 224A
GPU Core Power: AVG 207W, but spikes as high as 274W
RX470 Nitro 8GB:
1300/2100, -100mv, ~190 S/s;
GPU Core Current: AVG 75A, but spikes as high as 99A
GPU Core Power: AVG 74.5W, but spikes as high as 99.6W
Do you think these spikes can be the reason why my rig freezes? I will describe my problem a little.
I have a 7970, a 280x and two fury nitros. During the last couple of weeks I have been trying to run my system stable with no luck. Freezes can happen at any time after starting to mine. Sometimes minutes, sometimes hours.
Rig specs: Asrock 970 extreme4. Sempron 145. 8GB ram. EVGA 1300 G2. Sapphire 7970 ghz edition, sapphire 280x vapor-x, 3x sapphire fury nitro OC. Tahiti cards undervolted on bios, fiji cards on msi afterburner. No OC on furys. Win 10. 12.6.3. CM 11.1.
First I changed all risers to v6 ones.
Next I upgraded the processor to athlon x2 because I noticed that I was getting less hashes when MSI afterburner was on and I thought the system would be more stable.
After a couple of days more I changed the mobo to asrock h81 pro btc with celeron 1840.
Still no luck.
I thought that the power was insufficient so I added a corsair rx1000 linked with an add2psu device.
No luck, freezes persist.
Changed EVGA to corsair hx1200i. This psu is powering mobo, raisers and tahiti cards.
Nothing changed.
I stopped undervolting. Still same freezes.
One fury died the day before yesterday. No fans, not detected in win 10, not detected on ubuntu, mobo not booting when the card is alone.
I changed risers again to the furys.
I used separate cables for each riser.
I powered the offending fury card with one cable for each connector. Still the same.
I tried catalyst 15.12. Same effect.
Sometimes I see 511 degrees in the fury card on CM log prior to freeze, sometimes it just stops hashing without any error and the watchdog doesn't restart the miner, sometimes all 4 cards go to 0.000 hashing without any error, sometimes after gpu reported incorrect temperature 511°C.
I'm already out of ideas.
Any hint, anyone?
Edit: typo
I also have this issue, I have 4xR9 Fury Nitro and also getting random freezes and one of my cards died in one of them. I have also tried different risers and MOBOs with no luck. It seems the Furys were not a good choice. Has anyone been succesful in running these cards stable? I'm out of ideas to try.
4x Sapphire R9 Fury Nitro
H81 PRO BTC R2.0
Celeron G1840
LEPA 1600W
