- Nov 23, 2014
- 10
- 0
- 4,510
Good day!
I'll preface this by acknowledging that the following stress test routine might be a bit overkill for some, but I'd enjoy getting rock solid stability.
The Specs:
Sapphire R9 280 OC
Intel i7 920 + Noctua NH-D14
8gigs of DDR3 RAM
Asus P6T Deluxe V2
750W Corsair PSU
----------------------------
The Problem:
TL;DR
When running Prime95+Furmark with both GPU and CPU OC'd the Machine restarts itself slowly (black screen > fans slow down > stays there for 10-15 seconds > shuts down > starts up again. On its own.)
I've Bolded the essential information as I realize the post is quite long.
---------------------------
OCs:
I7 920
180 x 21 ratio = 3.780mhz
Voltage - 1.225
Hyperthreading On
All other voltages set to their standard values.
Happens regardless of Speedstep and LLC settings.
Runs 50 IBTs at maximum stress settings fine.
R9 280
940/1250 stock to 1000/1300.
Ran Unigine Heaven and got it to 1100/1575 with 0 artefacts or stability issues. I was thrilled.
Played Crysis 3 for 1 hour and artefacts kept popping up until I dropped it to 1000/1300. I was less thrilled.
Then I decided to really stress it.
------------------------------
Stress Test, Temps & Behavior:
Prime95 + Furmark at once.
This is where, 20 minutes into the test, the PC Will inevitably reboot itself. No artefacts. No BSODs. No hangs. A clean restart, every time.
Temps without any OC:
i7 920: 72*C
R9 280: 71*C
(If I run each separately, both top out about 5*C lower)
Temps with both OC'd
i7 920: 82*C
R9 280: 76*C
(Again, if run separately, both top out about 5*C lower).
Highest temps I've ever gotten in a game:
Crysis 3
i7 920: 72*C
R9 280: 73*C
With both OCs on and admittedly high ambient temperature.
Then I tried disabling the GPU OC and realized that the problem persisted.
I7 920@3.8ghz, Furmark + Prime95 = Reboot after 20 minutes.
Temps with only the i7 OC were about the same. 80*C CPU and 75*C GPU.
Disabled Both OCs: Problem gone. Fully stable.
Questions:
- Does a lack of artefacts, BSODs, driver crashes, etc. and the repeated occurrence of the Reboot indicate this is not directly from the CPU/GPU OCs?
- Could it be the PSU?
- Would you say it's safe to run the OCs if everything is stable in all games and stress tests IF Run Separately or should I keep tweaking OCs until P95+Furmark holds?
Thank you in advance! Would really appreciate any input!
I'll preface this by acknowledging that the following stress test routine might be a bit overkill for some, but I'd enjoy getting rock solid stability.
The Specs:
Sapphire R9 280 OC
Intel i7 920 + Noctua NH-D14
8gigs of DDR3 RAM
Asus P6T Deluxe V2
750W Corsair PSU
----------------------------
The Problem:
TL;DR
When running Prime95+Furmark with both GPU and CPU OC'd the Machine restarts itself slowly (black screen > fans slow down > stays there for 10-15 seconds > shuts down > starts up again. On its own.)
I've Bolded the essential information as I realize the post is quite long.
---------------------------
OCs:
I7 920
180 x 21 ratio = 3.780mhz
Voltage - 1.225
Hyperthreading On
All other voltages set to their standard values.
Happens regardless of Speedstep and LLC settings.
Runs 50 IBTs at maximum stress settings fine.
R9 280
940/1250 stock to 1000/1300.
Ran Unigine Heaven and got it to 1100/1575 with 0 artefacts or stability issues. I was thrilled.
Played Crysis 3 for 1 hour and artefacts kept popping up until I dropped it to 1000/1300. I was less thrilled.
Then I decided to really stress it.
------------------------------
Stress Test, Temps & Behavior:
Prime95 + Furmark at once.
This is where, 20 minutes into the test, the PC Will inevitably reboot itself. No artefacts. No BSODs. No hangs. A clean restart, every time.
Temps without any OC:
i7 920: 72*C
R9 280: 71*C
(If I run each separately, both top out about 5*C lower)
Temps with both OC'd
i7 920: 82*C
R9 280: 76*C
(Again, if run separately, both top out about 5*C lower).
Highest temps I've ever gotten in a game:
Crysis 3
i7 920: 72*C
R9 280: 73*C
With both OCs on and admittedly high ambient temperature.
Then I tried disabling the GPU OC and realized that the problem persisted.
I7 920@3.8ghz, Furmark + Prime95 = Reboot after 20 minutes.
Temps with only the i7 OC were about the same. 80*C CPU and 75*C GPU.
Disabled Both OCs: Problem gone. Fully stable.
Questions:
- Does a lack of artefacts, BSODs, driver crashes, etc. and the repeated occurrence of the Reboot indicate this is not directly from the CPU/GPU OCs?
- Could it be the PSU?
- Would you say it's safe to run the OCs if everything is stable in all games and stress tests IF Run Separately or should I keep tweaking OCs until P95+Furmark holds?
Thank you in advance! Would really appreciate any input!
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