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Unlocking a AMD Phenom II X2 Callisto 545 3.0Ghz to Quad core - Page 2

post #11 of 19
Thread Starter 
Ok so far I have my processor overclocked to 3.4Ghz running stable so far, with a Burn In test Passed under my belt. Working at getting it higher but not too much as I really would like control of core voltage but so far so good 3.0 to 3.4 is a decent jump and I know it can easily go higher even if that means my ram is underclocked a bit.

I am upgrading to Artic Cooling Freezer 7 Pro Rev. 2 heatsink/fan and also MSI 785GT-E63 mobo later this week and should very easily see a major gain/improvement then.
A m d Redd Storm
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A m d Redd Storm
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post #12 of 19
Quote:
Originally Posted by Profehsah View Post
Are you talking about in the bios, i believe it's a power setting called phase control... is that what you are talking about? If so I have that disabled, or should it be enabled, also I have AMD Cool'n'Quiet disabled and spread spectrum disabled as well.
That setting is irrelevant to what I was saying.

Don't blame me when your board takes the blow. Someone else with an x4 overclocked and that same board very very recently saw sparks coming from the mosfets during a stability test. That link I haven't posted in my big list of horror stories yet.
post #13 of 19
Thread Starter 
I'm not trying to unlock cores just overclock for the time, and this post was to gain perspective as well which is why I am not trying to unlock extra cores at least not till I get swapped over to an Artic Cooling Freezer 7 Pro Rev. 2 heatsink/fan and also MSI 785GT-E63 mobo later this week.

As I have stated though, I am Overclocking it still though and so far stable at 3.4Ghz
A m d Redd Storm
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A m d Redd Storm
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post #14 of 19
785GT-E63 is also a 4+1 power phase. It is a heatsinked 4+1, however MSI boards have been shown to not stop with the blowing even if heatsinks are on. A lot of issues came to with the 890GXM-G65 and overclocked 125W processors. I'd limit the voltages on that board still for safety.
post #15 of 19
Thread Starter 
Well so far stable at 3.4Ghz and have yet to swap out mobo and heatsink for better but I get what you are saying and will be wary about the 4+1 Phase. I also might be going with a higher mobo then what I am currently going to be upgrading to. The current upgrade is MSI 785GT-E63 mobo but looking for a mobo with 890 Northbridge & 850 Southbridge as from research people tend to get better results from this overclocking and unlocking of cores. I have been taking this OC slow and steady making sure each OC is capable and can be handled by my mobo/comp etc... Thank you for this info as it is very relevant to what I am trying and will do. Which is to have max overclock and checking and possibly running with unlocked core/s.
A m d Redd Storm
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A m d Redd Storm
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post #16 of 19
Hello!
Not wanting to create my own thread I will ask in this one.
I also have a Phenom II x2 545 and an ASUS M4N78 motherboard.
Is there a way to unlock the other cores? Because I haven't found a BIOS for my motherboard that supports AAC.
post #17 of 19
I wrote some guides lately concerning VRMs... you'll want to look in my sig

I don't believe M4N78 has ACC and of course there's the 4+1 VRMs on that board too.
post #18 of 19
amd dude, your the one to talk, u should not be overclocking with a quad core on your current MSI 870-G45 its only 4+1 phase chokes
    
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post #19 of 19
Just a quick clarification about unlocking cores. I have a 555, which has about an 80% unlock rate. These chips are known for being highly successful when it comes to unlocking and overclocking. Case in point my current computer is now a quad running at 4ghz on air cooling. (just put my entry into amd 4ghz club)

A failure to post almost definitely means those cores were disabled due to instability. If you really wanted to see if they would unlock you could try underclocking as you are attempting to unlock the cores. If this works it might very well point out that the last two cores were unstable.

I'm not sure how your mobo operates but there are sometimes options to unlock a third but not the fourth core. If you can, try that. In my BIOS there is a "Manual" setting for ACC which allows 3 or 4 cores.

I don't have any experience with the 545, but there aren't many other cpu's with that high of an unlock rate. I'd definitely lean towards your last 2 or 1 cores being unstable. A good overlock would be


Hope this helps
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