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Phenom II 840 overclocking - Am I doing it right?

post #1 of 7
Thread Starter 
I've been overclocking small amounts for a while, but I just upgraded from my old 2+1 phase AM2+ motherboard (puke.gif) so now I'm ready to take it further. I just want to make sure I'm not doing something that's going to break my shiny new motherboard or something thumb.gif

I have it at 4 Ghz with 1.525 Vcore and I'm stress testing right now. NB frequency is at 2500Mhz, LLC is on low or medium (I'll check when I reboot in a minute) because the Vcore was going up to about 1.63 with it on auto, disabled CnQ, pretty much everything else is at default. I also need to fix my RAM speed timings.

http://valid.canardpc.com/show_oc.php?id=2303759

I'm going to reboot, fix my RAM settings, and see if I forgot to mention anything I changed and edit this post in a few minutes, brb.

Edit: Here's everything in my BIOS
_______________________________________________________
CPU Clock ratio: x16 (4000Mhz)
CPU NB Freq.: x10 (2500Mhz)
CPU Freq: 250
PCIE clock: 100Mhz
HT Link width: Auto
HT Link Freq: x8 (2000 Mhz)
DRAM E.O.C.P: Disabled
Memory Clock: x6.66 (1666Mhz) [this should be fine right? 66 Mhz over stock. Next highest option would be only 1332 Mhz]

DRAM Configuration:
^DDR3 Timing Items: Manual, with everything at default. The timings look correct here, but they were at 10 in windows for some reason.

System Voltage Ctrl:
^Everything at normal except CPU Voltage at 1.55

LLC: Regular
C1E Support, Virtualization, C&Q, CPU unlock: all disabled
______________________________________________________________

http://valid.canardpc.com/show_oc.php?id=2303780


Now I'm going to run Prime95 overnight to make sure it's stable biggrin.gif
Edited by TheYonderGod - 3/21/12 at 2:31pm
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post #2 of 7
  • Firstly before testing anything at your defined base point, make sure the RAM is stable at the 66Mhz frequency increase by running HyperPi at 32M setting (or if you want to push the ref clock even further, keep going).
  • From your definite-stable (able to boot) basepoint that you have set right now you should work on gradually lowering the voltages until you find the minimum stable voltage where you can run Prime.  And/or take advantage of headroom when you find it.  Going downwards from a definite-able-to-boot basepoint is one way to overclock that works and may be faster than going from the ground up and testing.
  • Avoid passing 1.55V for air-cooling.  Ensure your temps are within 62C.
  • There is no need to disable C1E idle state and Cool'n'Quiet and both will be beneficial in reducing idle temps, fan speed and such with no impact on overclockability; I suggest you keep them enabled.  Hardware-based virtualization should also be enabled as it has absolutely no effect on overclockability and, who knows, might be useful for you in the future.
  • Lock the PCI-E clock at 100Mhz as a bus clock increase can take up the PCI-E clock with negative impact to system stability (PCI-E clock = SATA controller clock on the Southbridge!!! A PCI-E clock higher than 100Mhz brings little performance difference but can corrupt data from the HDD!) I'm not sure if upping the ref clock necessarily ups the PCI-E clock but it's best to be sure.  Small overclocks of the PCI-E clock up to, say, 102Mhz (as I have done) should be fine if you're really interested in performance squeezing.
  • HT Link width should be moved from the auto multiplier.  This is deceving on Gigabyte boards because the BIOS reports the speed bins and not multipliers, from the 200Mhz default reference clock.  That means at 2000Mhz setting or auto (10x multiplier) you are actually running at 2500Mhz.  Imagine the speed settings are the multipliers from 200Mhz ref clock, then set your HT link to 2000Mhz +/- 200Mhz.  Higher HT links provide no performance increase and will impact stability AND performance.
  • It is ideal to test in between clock speed changes with IntelBurnTest on high or very high setting for quick tests and then work on stability in the end during your longer overnight tests with Prime95.  Both tests stress the CPU and others differently so don't just run one.
  • Everything else looks good to me thumb.gif
post #3 of 7
Thread Starter 
Thanks, would +rep if I could. You're one of the most helpful people on this forum, I really appreciate it thumb.gif

  • Ran HyperPi and it passed
  • If it's still running in the morning I'll lower it to 1.5 and test again tomorrow night. I don't plan on going higher than 4Ghz, after reading a some reviews I think I'll be lucky if I can get 4Ghz, so I probably wouldn't be able to get much if any higher. Plus I realllly like nice even numbers, stupid OCD doh.gif
  • That's what I was thinking about the voltage, thanks for confirming it. Temps haven't gone over 46C except when LLC put the voltage at 1.6+ biggrin.gif
  • Done
  • Done
  • I think you may be wrong about it reporting the wrong speed, or auto had it at the right speed already, because CPU-Z reported the HT Link at 2000Mhz, but I changed it to 8x anyways.
  • I'll run an IntelBurnTest as well tomorrow

Thanks again, and good night now. smile.gif
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post #4 of 7
Quote:
Originally Posted by TheYonderGod View Post

I've been overclocking small amounts for a while, but I just upgraded from my old 2+1 phase AM2+ motherboard (puke.gif) so now I'm ready to take it further. I just want to make sure I'm not doing something that's going to break my shiny new motherboard or something thumb.gif
I have it at 4 Ghz with 1.525 Vcore and I'm stress testing right now. NB frequency is at 2500Mhz, LLC is on low or medium (I'll check when I reboot in a minute) because the Vcore was going up to about 1.63 with it on auto, disabled CnQ, pretty much everything else is at default. I also need to fix my RAM speed timings.
http://valid.canardpc.com/show_oc.php?id=2303759
I'm going to reboot, fix my RAM settings, and see if I forgot to mention anything I changed and edit this post in a few minutes, brb.
Edit: Here's everything in my BIOS
_______________________________________________________
CPU Clock ratio: x16 (4000Mhz)
CPU NB Freq.: x10 (2500Mhz)
CPU Freq: 250
PCIE clock: Auto
HT Link width: Auto (2000 Mhz)
DRAM E.O.C.P: Disabled
Memory Clock: x6.66 (1666Mhz) [this should be fine right? 66 Mhz over stock. Next highest option would be only 1332 Mhz]
DRAM Configuration:
^DDR3 Timing Items: Manual, with everything at default. The timings look correct here, but they were at 10 in windows for some reason.
System Voltage Ctrl:
^Everything at normal except CPU Voltage at 1.525
LLC: Normal
C1E Support, Virtualization, C&Q, CPU unlock: all disabled
______________________________________________________________
http://valid.canardpc.com/show_oc.php?id=2303780
Now I'm going to run Prime95 overnight to make sure it's stable biggrin.gif

Well done on leaving that 2+1 motherboard tongue.gif

Remember on AMD it is very important to OC the NB, you get much better performance gains than CPU alone smile.gif.

Yeah like xd said, when youre ocing make sure youre RAM is stable, basically make sure you only have 1 or max 2 variables at one time. e.g.

If you have stock, then OC to 4000, 2500 and faster RAM, and it crashes, you don't know what made it unstable.

Find a nice CPU and NB clock with ram at stock (to make sure it's stable) and after your CPU/NB is stable OC the RAM

BTW CPu voltage seems a bit high, I'm not too sure with the quad cores though, i just know mine shouldnt go over 1.45-1.5
post #5 of 7
Thread Starter 
It crashed after around 4 or 5 hours last night so I bumped the voltage up to 1.55 and it's been going for almost 7 hours now. Max temperature is 49 instead of 46 now, but that's still under 50 so I'm happy with it, It used to get up to the low 50s on my stock cooler at 3.5Ghz.
If it passes 8 or 9 hours of Prime95 I'll run an IntelBurnTest and if it passes that I think I'll call it stable biggrin.gif
Quote:
Originally Posted by Klinkey View Post

Well done on leaving that 2+1 motherboard tongue.gif
Remember on AMD it is very important to OC the NB, you get much better performance gains than CPU alone smile.gif.

I was googling around and I thought I read that the NB should always be around 2500Mhz. If I do OC it, what should I be looking to get around? Will I need to increase the NB voltage too? Edit: it wont even let me set higher multiplier than 10x (2500Mhz)



Edit: 9 hours of Prime95 passed, IntelBurnTest time now...

And it passed biggrin.gif

Time to play some BF3 now.
Edited by TheYonderGod - 3/21/12 at 6:45pm
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AMD Turion TL-60 x2 2Ghz Acer Aspire 5517 Radeon HD 3200 4GB DDR2 800 Mhz 
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64GB Kingston SSD Windows 7 
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My rig
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post #6 of 7
Thread Starter 
Ok, so BF3 is crashing now. Twice in a couple hours of playing. Both times it ended with a weird sound, and the first time the sound lasted until I restarted my computer, is it possible it's something wrong with my new (refurbished) sound card? I guess I'll play for a while at stock CPU to see if it still happens and if it does I'll try taking out my sound card.
My rig
(17 items)
 
   
CPUMotherboardGraphicsRAM
AMD Turion TL-60 x2 2Ghz Acer Aspire 5517 Radeon HD 3200 4GB DDR2 800 Mhz 
Hard DriveOS
64GB Kingston SSD Windows 7 
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My rig
(17 items)
 
   
CPUMotherboardGraphicsRAM
AMD Turion TL-60 x2 2Ghz Acer Aspire 5517 Radeon HD 3200 4GB DDR2 800 Mhz 
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64GB Kingston SSD Windows 7 
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post #7 of 7
Quote:
Originally Posted by TheYonderGod View Post

It crashed after around 4 or 5 hours last night so I bumped the voltage up to 1.55 and it's been going for almost 7 hours now. Max temperature is 49 instead of 46 now, but that's still under 50 so I'm happy with it, It used to get up to the low 50s on my stock cooler at 3.5Ghz.
If it passes 8 or 9 hours of Prime95 I'll run an IntelBurnTest and if it passes that I think I'll call it stable biggrin.gif
I was googling around and I thought I read that the NB should always be around 2500Mhz. If I do OC it, what should I be looking to get around? Will I need to increase the NB voltage too? Edit: it wont even let me set higher multiplier than 10x (2500Mhz)
Edit: 9 hours of Prime95 passed, IntelBurnTest time now...
And it passed biggrin.gif
Time to play some BF3 now.

Ahh bad luck, northbridge oc is important frown.gif
well done with the rest of it though!
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