Unlocked 555BE causing instability??

[richierich1212]

I guess your 3rd core is really defective then. Tri-core is still good though.

 

[onza]

So the real question is... for those wanting to purchase the Microcenter deal.

Take the risk buy a dual core for a quad core.

Or just buy the Tri core and call it good.

 

[Chappie]

I went with the tricore a little over a month ago...could not be happier...unlocked the 4th core and I'm running it at 3.1 ghz ....paired with a 5770 and it's magic

Chappie

 

[Axon]

So the real question is... for those wanting to purchase the Microcenter deal.

Take the risk buy a dual core for a quad core.

Or just buy the Tri core and call it good.

No question, everyone should go in for the X3 720 in that deal. I bought my 555 before it, but still got it for like $89, so I'm happy...

 

[tweakboy]

You just might have to give her more juice "more CPU voltage". More voltage. Just tweak it one up until its stable,, gl

 

[Krakn3Dfx]

Had the same problem here, PC runs fine, but severe graphical glitches. Dialed back to 2 cores, problem went away.

Ahh well, not going to dwell on it, still a nice upgrade for my son over the e5300 he had. Got the x2 555 running at 3.8GHz nicely, maybe at some point I will mess around and figure out which core is causing the problem then at least I might be able to enable 3.

 

[Krakn3Dfx]

So question, due to the graphical anomalies, I went into the bios, disabled the 3rd core, booted into Windows, same issue, so went back into the bios, enabled the 3rd core and disabled the 4th core, booted into Windows, same issue. So I'm assuming at this point both cores are problematic?

Kind of weird that they would both cause the same issue, I'm going to pull the PCI-E card tonight and see if the same issue happens with the onboard video, the PCI-E card I'm using is a Zotac 9800GT "Green" model that doesn't have any extra power other than the PCI-E slot, so I'm wondering if it's possible it's a power draw issue w/ the extra cores.

I'm not giving up quite yet, considering it gets into Windows. I'm still not convinced that there's not something else at play here.

 

[Krakn3Dfx]

Core 2 turned out to be the villain. Went through and disabled all but 1 core until I found it, and once I turned it off, graphical issues went away.

Weird thing is, when I had OCCT running, the graphical anomalies seemed to pretty much go away, so it was like the more heat and cycles applied to the core, the less problems.

Ahh well, 3 cores it pretty good still, not going to complain

 

[richierich1212]

When you have 3 cores enabled, what shows up in CPU-Z? AMD 455?

 

[Krakn3Dfx]

When you have 3 cores enabled, what shows up in CPU-Z? AMD 455?

Still shows up as a 940 in CPU-Z.

 

[spdfreak]

I just put together the 555 BE/MSI 785G system I got from Frys a couple of weeks ago. Pretty much using a bunch of leftover parts- Enlight 20 pin 420W PS, old Maxtor 120GB HD and 2GB Patriot 1333 DDR3. I went into the bios and enabled ACC and core unlock and got all 4 cores. This is still using the stock HSF too.
So far, all 4 cores seem OK for normal desktop usage, but any real stress like Prime or LinX will cause the system to shut off in about 2 runs. So, I'm guessing step 1 is to get a better PS and step 2 is to get a decent HSF? Unlocked, this is really a 955 (145W) so the 420 should still be plenty... I kind of wanted to test the cores before I spent money on upgrades but that doesn't seem like it will work. Should I try boosting the Vcore a bit? Speedfan shows it at 1.34 which is slightly lower than the 1.35 that CPU-Z shows. BIOS shows 1.33.

 

[VirtualLarry]

A 20-pin PSU is not going to cut it. They have most of their wattage on the 5v and 3.3v lines, and not the 12v that modern motherboards need. Definately replace the PSU, that is why your system is shutting down.

 

[bupkus]

Unfortunately, yes. I enabled Core 3 (the bad one) and set the ACC for that core to 0% (the rest are at -2%) and still the same problem.

Also, everything else is at stock speeds. RAM is set correct speed (1600Mhz), and onboard video is disabled...

I don't know how to post a picture, but if you PM me your e-mail address I could e-mail one to you.

Any other thoughts/suggestions, or should I just give it up and run as a tri?

TYIA!

Don't be in such a hurry. Bring it down to 2 cores and test ALL your subsystems. Learn just where your limits are including your memory so you can be sure where each of the two 3 core solutions should be. This way you can determine the exact limit of each of the 2 extended cores. Then you can determine just how far you can expect to go with all 4 enabled. Just don't try to do this all in one night.