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Old February 18, 2010, 12:11 AM
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Default Motherboard to unlock Phenom II 555BE?

Hello.
I am planning to buy a PC with this configuration, though I'm not quite sure which Motherboard to choose. The mobo should be able to unlock the 4 cores and also Overclock to 3.6 - 3.8GHz. Perhaps it might require a BIOS update for that? I've read some unlocking/overclocking/stability change with a BIOS update? So it should be able to update the BIOS too? If the Mobo has USB 3.0 and SATA 3 6Gbps, then how much more will it cost? If the difference is a little, then I'll go for it. If its too costly, then I'll do without it.

Also, I'm confused about the RAM. There are different RAMs with 1333/1600MHz etc. Since I plan to Overclock to 3.6/3.8GHz which RAM should I get?

Also, if you think that something can be added/removed/changed from the configuration, then I'll appreciate your inputs :-)

AMD Phenom II 555BE
4GB DDR3 (1333/1600?) RAM
1GB 5770 Graphics
500GB Samsung SpinPoint F3
24x SATA DVD Writer
How many Watts PSU will be required for OC?

Thanks for your replies :-)
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Old February 18, 2010, 07:11 AM
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Any mobo w/ the 710 or 750 southbridge
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Old February 18, 2010, 11:40 PM
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Thank you everyone for your replies.

So I guess I'm done with the PSU problem. 450W.
And almost coming to a conclusion with the RAM, that 1333 should suffice. Someone disagrees?

Am still learning about the Mobo. This link helped a lot, though could use some more help! I'd appreciate if people can please name specific board models, so that I can see what are people recommending the most. That would definitely help me with my decision. It must not have many bells and whistles, as long as it can unlock and OC to a little 3.6GHz, I'm fine with it. The lesser the cost, the better!

Thank you again everyone for your replies :-)

Some of the quotes below are taken from different forums!

Quote:
Most importantly, please remember there is no guarantee the chip you receive will have 4 functioning cores or will overclock to your expectations.
Thank You, I understand that. Though I'm willing to gamble!

Quote:
the PSU requirement you can find out using this
eXtreme Power Supply Calculator
Thanks. I've used that and found that my Recommended Minimum PSU Wattage is 379W, so I think I'd go with a 450W PSU.

Quote:
You'll want 1600mhz RAM and a 400w PSU will be fine, although I would probably stretch to 450/500w.
I'll go with 450W

Quote:
I have the P2-550 running with all 4 cores unlocked @ 3.6 GHz on a Gigabyte GA-MA785GT-UD3H board using 1333 MHz memory, and got it to 3.6 GHz by upping the FSB to 220 MHz and upping the multiplier until CPU wouldn't go any further. ( HT clock increased as well to 2200 MHz). Memory is running at 1468 MHz effectively without lowering timings (Kingston HyperX) Vcore is increased a bit as well.
Higher clocked memorymodules are faster at a given speed but that does not translate in a lot of performance difference as CPU overclocking does.
So will a 1333MHz RAM be fine? I'll check the prices, if the difference is negligible, then I'll go with 1600MHz. But if there is difference in performance, then I'll go with 1600MHz only!

Quote:
you just can't go with the latest bios since it disabled the ability to unlock cores, but second to last should work.
If a board has a BIOS that doesn't support unlocking, can I change the BIOS?

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Personally, I'd go with an Asus because they allow independent unlocking, in case your chip only has 3 good cores and not 4. You can however, unlock with just an MSI 770.
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Transcend 2*2=4GB DDR3 1333MHz C9 @ 4.4k
Corsair VX450W @ 4k
ECS 785GM-M @ 4.8k
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Go for Biostar 790GX A3+.

Full atx,Core unlocking option, Excellent overclocker.
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GA-790FXTA-UD5 <- Love this motherboard, its very stable while overclocking
Quote:
Biostar TA785GE + BIO-unlocKING, AC Auras Wave, PII555 1002EPMW, Batch 1427

Test X4 4,0/4,1Ghz 1.472V Real - windows boot OK.
Stress Test X2 4,1Ghz ~1,39V and 4,0Ghz ~1,34V real
Room temp. 22°C
Quote:
Motherboard with ACC support (SB710 or SB750 southbridge) or NCC (Nvidia’s answer to ACC) AND supports core unlocking.
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My personal motherboard of choice is the Biostar TA790GX 128M with 78DEA113 BIOS. I have successfully unlocked my X2 550BE and X3 720BE with this board.
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id go with the gigabyte 790FX or the MSI 790FX
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The M4A79 series are very good boards, they were just out of my price range.
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First change the EC Firmware Selection to HYBRID and then enable ACC ) and if the cores are good the system will still post and run windows - if not then you just go back into the BIOS after it resets itself when the boot doesn't work and disable them again
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I hear good things about Gigabyte's boards
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another thumbs up for Gigabyte mobos in general here.
Quote:
GIGABYTE GA-MA770T-UD3P AM3 AMD 770 ATX AMD Motherboard
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Old February 20, 2010, 04:40 AM
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OK after going through all the suggestions (thanks for it), I think that Asus M4A785TD-V EVO $100 is the motherboard that will suit me. Since I'm not gaming, I've decided to save $200 by removing HD 5770 GPU. And since the mobo has IGP HD 4200 with 128MB shared, expandable to 512MB shared, so it should be able to play videos at 1920x1080 res(?) Anyone has experience with this mobo? And how are Asus mobos in general? Are they worth a buy?

The other contender here is Gigabyte GA-MA785GT-UD3H $95, the only difference I can see is that it has just one PCIe slot, which is why I'm giving Asus a preference. Rest its the same.

But I need a go-ahead from someone knowledgeable! Should I press the button for Asus M4A785TD-V EVO or does anyone has a better (in terms of price and/or features) mobo? It should be able to unlock cores, OC to 3.6GHz and have an onboard video.

Quote:
1333 Mhz ram is fine, best "bang for the buck", can sometimes be overclocked nicely as well... I prefer 1333 over 1600 actually, due to its lower timings ... having super high memory bandwidth is all well and good, but not if you have to have super-loose ram timings to get there!! ( latency, eccch....)
How would I know if its having lower times, high mem bandwidth and tight timings? What do I look into to find it? I've seen something like 9-9-9-9
Is this how you identify it? So what digits should I look for? They must not be very costly! Best-bang-for-buck will be good enough for me.
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Old February 20, 2010, 06:38 AM
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You realize that unlcocking a chip isnt a guarantee? The IGP radeon 4200 is a damn fine onboard solution, and played a lot of my games when I was stucking using one.

Best bet would be just get yourself a an actual phenom x4 chip and cheap out on the board. ie: 760g chipset or something along those lines as ive yet to see a phenom that wouldnt do 3.8ghz 24/7. As for ram, anything @ 1333mhz with say 7-7-7-20 1T timings should be good, but a bit more expensive then its counterparts.
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