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Stuck at 3.8ghz on Phenom II X2 555 BE

post #1 of 5
Thread Starter 
Seems like no matter what I do can't break 3.8 ghz on this X2 555 black, been trying for a few days now. I'm really fine with 3.8ghz and I'm going to be buying a new cpu soon, but it confuses and bothers me as to why I can't even get 3.9ghz stable when I've found many others that have reached it easily at 4.0ghz and beyond on air.

CPU : Phenom II X2 555BE
Mobo : M4A785TD-V EVO
Ram: 8gb Gskill ripjaws 1600 9-9-9-24

First I tried raising multi to 19.5 and adding to some vcore, then I bumped up my nb up to 1.3v... ended up with 1.55v on my vcore and even increased my ram timings to no effect, prime95 would still fail and crash me after ~5-10min. Disabled AMD Cool n Quiet and messed with LLC a bit to no effect. I also increased NB freq to 2600mhz

I'm using stock cooler with some fresh applied arctic silver 5 only, temps get a little high (~60c) but within operating temp (70c) according to AMD's website. I really don't care about running the oc 24/7 I just want to figure out why I can't seem to get it stable. I tried unlocking some cores back when I bought the CPU but amd gave me a dud. frown.gif

Anyone have any thoughts?
post #2 of 5
what cooler are you using? Stock doesn't like to go as far as others tongue.gif

You should start out slow and go up one tick at a time. keeping it stable at each level until you reach your max.

You will want to start out at stock and change your LLC setting. LLC usually ends up on high or very high or extreme or auto or even off for some people. This will all depend on the motherboard and how it reacts to LLC. You will want to use a program like OCCT that provides graph output to view your Vcore and how it reacts. You want to see that it has the least amount of offset and provides the most stability under loads.

You will either want the least amount of vdroop or the least amount of vboost possible. Both are ok to have but must be managed and minimized. The key is to have as close to the same voltage at idle as you do under load, while being the least unstable (sometimes extreme can have the same results as very high or high but be very jolty so its best to go with the lowest + least jolty setting) . Some people even end up turning theres completely OFF due to it being so jolty, if you have to do this you may have a large vdroop, this is ok to have but you will need much more voltage at idle to compensate for droop during load. Large droop is still ok so long as your stable when it levels out.

Once you have LLC figured out and understand a bit how it works you will then want to move on to overclocking. Its best to disable all power saving features until you are stable and at the settings you want:



up the multiplier until unstable, up the vcore until stable, up the multiplier until unstable, up the vcore until stable, etc, etc. Always keep under safe temps LLC may even have to be increased after a large increase in clock (not likely though droop will probably increase). Best to use a program like hwinfo64 for monitoring (one of the best thats kept up to date with proper sensor readings)
Edited by dmfree88 - 9/7/13 at 11:26pm
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Intel Overclocker
(12 items)
 
Media PC
(8 items)
 
 
CPUMotherboardGraphicsRAM
Intel i7 4790k Delidded + Lapped ASRock Z97 Extreme4 MSI Twin Frozr GTX 660  Corsair Vengeance Pro 2400mhz DDR3 
Hard DriveHard DriveOptical DriveCooling
OCZ Deneva 2 R series 400GB SSD WD Green 4TB HDD Asus DRW-24B1ST Phanteks PH-TC14PE_RD 
OSPowerCaseMouse
Windows 10 Seasonic 650w M12II Phanteks Enthoo Pro M with Acrylic side Cobra e-blue 
CPUMotherboardRAMHard Drive
intel core 2 quad q8200 Dell studio stock Dell studio Stock Corsair Force 3 SSD 
Hard DriveOptical DriveCoolingOS
External powered Seagate expansion desk Dell studio stock Stock Windows 10 
CPUMotherboardGraphicsRAM
FX-8350 GA-990FXA-UD5 MSI 7870 Hawk Edition Gskill 1600 2x4 GB 
Hard DriveOptical DriveCoolingOS
Corsair Force Series 3 22x Samsung w/ lightscribe dvd/cd burner Noctua NH-D14 Win 7 pro x64 
MonitorPowerCase
Acer x173w Seasonic M12II 650watt Semi-Modular PSU Apevia x-dreamer4 (with side window and red) 
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post #3 of 5
Thread Starter 
Cooler is just a stock that came with the cpu though I've been monitoring temps, at 3.9 they seem to stay within reason though. I doubt pushing it much farther past 4.0 even if I could get it stable would be a great idea however.

My bios does LLC as a % based value, stock is something like 51%. I've tried lowering and raising it a bit, even tried 0% though my voltage spiked up to 1.62v during load which I didn't feel comfortable with as I've heard it's not too good to go over 1.55v with that chip. No matter what I do I just seem to get a bsod.

When I first started to oc it, I did some slow multi increases and found I can get all the way to 3.8ghz but at 3.9mhz no matter what I put vcore or LLC to I can't get a stable overclock, when I stress test it always bsods. I also tried raising the base clock instead of the multi and some of my ram timings/volts to see if I could hit 3.9 that way and still failed to find a stable setting.

Looking at your bios screenshot, I have CnQ and C1E disabled.

I'll check out hwinfo64, thanks for the reply!
Edited by AngelofApathy - 9/8/13 at 12:33am
post #4 of 5
I have to agree with dmfree88. Good advice.

You'll find 60c is going to be a factor. You'll want some form of budget cooler (Hyper 212 at min) and that should keep temps in check.
You'll be fighting an up hill battle till you get temps under control.

The Phenoms absolutely love the cold (under 55c max) for stability reasons. This should give you an idea of what a 555 usually does at 4174MHz with better cooling.
Ignor those fan speeds in HWMonitor lol, slightly off. Warning: Spoiler! (Click to show)

When you mentioned raising the NB to 1.3v, I hope you meant CPU/NB voltage correct?
If I miss a post feel free to PM me if I can help any further.
Edited by The Sandman - 9/8/13 at 12:59am
post #5 of 5
Thread Starter 
I guess it really just is my temps then, thanks for the insight!

As I said I'm buying a new cpu soon so it's not that imperative for me to push the limits of this one, I was really just curious to why I couldn't get it stable for future knowledge. I plan on getting a 212 along with it so I might throw it on this pc first and see how high I can push it for fun. Thanks for the help. smile.gif

Edit: Yes I raised the cpu northbridge not the chipset on the board.
Edited by AngelofApathy - 9/8/13 at 1:07am
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