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Undervolting LLano

post #1 of 7
Thread Starter 
I have an A6-3650 and I have read that you can undervolt them. How much do you think I could unvolt the CPU without reaching stability issues? Do you think if I dropped it from 1.4v to 1.2v i'd have to worry? I am running it w/ Cool n Quite disabled.
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post #2 of 7
Thread Starter 
Sorry but BUMP - Really interested.
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post #3 of 7
At stock, 1.2v should be very close to good. It depends on your workload. Stabiliy test with something like prime95. Occt/Intel burn test REALLY load up the cpu and even folding/boinc/3dmark11/cinebench/sisandra testing, I've never come across a situation that works the cpu that hard. I'm doing 3.5 @ 1.375v and folding 100% cpu load ATM.

I'd do 1.2v and run prime95 for a while. If it doesn't do anything bad, try a little lower. I've gone down to ~1.18something and still tested stable. NB was ok with 1.00v as well, but this requires some gpu/mem test like 3dmark11 to really test. NB frequencies make similar improvements to performance when ram speeds are also fast. Never tried it with slow ram.

Yeroon.
post #4 of 7
Thread Starter 
I did the 1.3V undervolt and stress tested for 10 hours without issue.
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post #5 of 7
Decrease the voltage until you cant boot. Then continue raising the voltage in small increments until it is stable. That is how I got my phenom ii 720 quad core to be stable at 1.2 volts. Plus it decreases the temps a ton. Good luck!

-Greg
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post #6 of 7
Yeah stock on my A6-3650 is 1.4v. I managed to undervolt to 1.25v (I think). Any lower and I get graphical errors in XBMC.
post #7 of 7
Just make sure you set Prime95's priority to 10 and leave it on overnight or something once you think you've got a stable undervolt. Setting the priority won't make it work harder or anything but it will cause instabilities to reveal themselves considerably faster.

And if you're feeling really OCD, run prime95 in safe mode. tongue.gif
 
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HTPC
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File server
(22 items)
 
CPUMotherboardGraphicsGraphics
Pentium G3258 @ 4.6GHz/1.281v (rock-solid stable) MSI Z97 PC Mate [media & productivity] Intel HD graphics [games] Diamond Radeon HD5870 1GB 
RAMHard DriveHard DriveOptical Drive
4x4GB Corsair Vengance DDR3 @ 1800MHz 1.504v Crucial M500 480GB SSD RamDisk - adaptive 10GB volatile scratch LG Blu-ray drive 
CoolingCoolingCoolingOS
Cooler Master X6 Elite with stock fan removed CPU fan: 120mm Arctic F12 PWM @ ~300rpm PSU fan: 120mm Kingwin case fan via PSU fan plug Windows 7 Ultimate - 64bit SP1 
MonitorKeyboardPowerMouse
E772p CRT (Trinitron) @ 79-94hz 1152x864/1280x720 PS/2 Microsoft Internet Keyboard (replaced cord) Antec EA-380D (380w) with stock fan removed Logitech MX510 (blue) with replaced USB cord 
AudioAudioAudioAudio
White Monoprice 9963 IEM headphones [Left ear] LostEarBuds medium single-flange tip [Right ear] Unknown medium single-flange tip Asus Xonar DS 
AudioAudioAudio
Dual SOIC LME49990 DIP8 op amp [music] Foobar2000 + Xonar ASIO driver [games & movies] Razer Synapse 7.1ch to binaural 
CPUMotherboardGraphicsRAM
Core 2 Duo (Penryn) T8300 @ 2.4GHz Dell Studio 1535 Intel 965GMA 2GB 667MHz Samsung DDR2 
RAMHard DriveOSMonitor
1GB 667MHz Samsung DDR2 60GB Corsair Force 3 SSD Windows 7 64bit SP1 Toshiba 39L1350U HDTV 
KeyboardPowerMouseMouse Pad
Some USB wireless Logitech keyboard Rocketfish universial power adapter (my cousin's) Some USB wireless Logitech mouse couch 
AudioAudio
HDMI audio-out to HDTV HDTV optical-out to Denon AVR-200 reciever 
CPUMotherboardGraphicsRAM
Pentium 3 @ 667MHz Some Intel mobo ATI Rage 128 AGP 32MB 2x256MB DDR1 
Hard DriveHard DriveHard DriveHard Drive
1GB Sandisk CF card - boot drive Western Digital Caviar SE - 320GB IDE Maxtor - 200GB IDE RamDisk - adaptive 64MB viotle scratch 
CoolingOSMonitorPower
Athlon XP 2000+ Palomino stock heatsink w/ copp... Windows 2000 Pro SP4 None - VNC is used instead Bestec ATX-250-12Z 
CaseOtherOther
Some super-basic beige case Intel PCI ethernet card Linksys PCI ethernet card 
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