Discussion in 'Overclocking & Cooling' started by WojtasRed, Apr 21, 2009.
How can I unlock 4th core? All I know, I must buy MoBo with SB750 to do that. But what`s next?
You need the right batch of CPU too, but it's still a 50/50 chance it will unlock. If you do get all of the correct batches, board bios etc then just set ACC(advanced clock calibration) to 0% on all cores or auto.
Do I need Mobo with SB750 or maybe also with SB700 will be fine to unlock 4th core?
SB700 doesn't have ACC. Only SB710 and SB750 do right now. But that still doesn't mean the bios can unlock it.
What do you mean saying `right batch `?
on the CPU, it has to have the 0904 batch code to unlock. Some older ones with 08XX do too but they aren't stable.
Only some mobo's are guaranteed to work (Biostar and Asrock support this bug) and getting a CPU that unlocks is luck of the draw. Go to Tom's Hardware and read their recent article on "unlocking" and you'll have a better idea of what's happening.
But if batch code is 08XX, even Biostar and Asrock don`t guarantee succes, right? How can I check my CPU`s code?
Yup.. I really hope you don't buy a 720 and expect a quad core, it's very luck based and even if you get a 4th core 720, there's still the chance of it not being stable.
How can I check my CPU`s code?
If you mean CPU batch code, it's on IHS, I think, and also on the box.
The small square heatsink that's attached on CPU core.
This should give you a better idea to look for 0904
And BTW that one doesn't unlock even being a 0904, tried on 2 boards.
So which MoBo could you suggest me for this Phenom II, I wanna sth better than my MoBo, but nothing expensive.
The MSI DKA790GX is cheap and very good. Not sure if you live in the US or not, but here's a link
Highly recommend it
Wanna sth without integrated VGA, plz
Then you're gonna have to spend top dollar for a 790FX.. What's wrong with having onboard graphics? Saved my butt a few times, they make great backup cards.
Or maybe it`s pointless to change MoBo in that case?
If you are buying one just to be able to unlock the 4th core, then no. It's not worth it.
agreed about not changing mobo... unless your mobo doesn't give you something you want (example xfire capability or something of the sort)...
I you do still want to change, I highly recommend this one
Actually there are starting to be some cheaper 790FX boards popping up. Here is the cheapest 790FX with the SB750.
And I found this the other day, it actually looks like a steal of a deal, but it's only SB600, but a $99 790FX! And it has full metal caps, normally you just don't see that in that price range.
But you got a nice board, I really wouldn't swap it out at a chance to get the 4th core, odds are not in your favor.
What about Biostar TA790GX with SB750?
that's a really good mobo that'll unlock very well.... that's the one I recommended
That's the board I use and it unlocks my 4th core quite well although it doesn't have a cooler on the MOSFET's. I bought a Thermalright unit for about $25 and it works fine.
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