Hey guys, I was tweaking voltages for the AMD Phenom II x3 720BE today and managed to lower it from the stock of 1.325v to 1.2v. I left the computer to run Prime95 and now after I came back from dinner the different processor cores are significantly behind each other (see atached pic). Is this because I gave it too less volts and it's trying to cope with it? I am also running it on the stock hsf.
Edit: Is it also safe to leave it at this current state?
so did you leave it at stock speed?
Yes, lowering voltage could cause it to fall behind a little, but i have noticed that when i ran it before, one core was a slight bit behind the other
My Computer
Computer Manufacturer/Model Number
Custom Build #2
OS
Windows 7 Ultimate 32-Bit
CPU
Intel Core 2 Duo E6300 O.C.'d to 2.80 GHz (For Now >:) )
Motherboard
Gigabyte P43-ES3G
Memory
4x1GB OCZ Dual Channel RAM
Graphics Card(s)
HIS ATI Radeon HD 5770 1GB
Sound Card
Onboard Sound
Monitor(s) Displays
Asus VH-236
Screen Resolution
1920x1080
Hard Drives
WD Caviar-Blue 250 GB SATA
WD Caviar-Green 1.5 TB SATA
so did you leave it at stock speed?
Yes, lowering voltage could cause it to fall behind a little, but i have noticed that when i ran it before, one core was a slight bit behind the other
If you used the PC for anything .. Internet browsing whatever while prime was running this can happen.
Also background tasks, AV scans etc.
It has to get CPU time from somewhere.
If Stable for 12hrs, I would think you're OK. The fact a couple threads are a step or 2 behind just means something needed CPU time from that core during the test and it fell behind in its work because of it. Nothing to worry about.
My Computer
Computer Manufacturer/Model Number
Custom (Self Build)
OS
Windows 7 Home Premium 64bit
CPU
Intel Core i7 2700k
Motherboard
eVGA P67 SLI
Memory
8GB Mushkin Redline Ridgebacks @1866
Graphics Card(s)
EVGA GTX570 SC
Sound Card
XiFi Titanium HD
Monitor(s) Displays
LG W2453V
Screen Resolution
1920x1080
Hard Drives
Intel 320 80GB -- Intel X25-V 40GB --WD Black 1TB x2 -- WD Blue 640GB
Ok, I ran Prime95 for over 12 hours and it was completely stable but core number 2 was like 4 tests ahead of the other 2 cores, so I'll just assume that core number 2 is the stronger core unless MSE secretly ran a scan in the background while I was asleep. Temperatures also topped out at around 45C with the AMD stock cooler which is pretty good I think. Reps to all of you that replied .
I think undervolting and underclocking in general is pretty safe, just as long as you Prime95 the machine for stability. I run my Phenom II X2 555 BE @ 2.1Ghz (1.120v) when downloading overnight, I haven't tried going lower on the volts but I'm pretty sure I can.
