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AMD K10.5 Core & Cache Unlocking Guide - Page 137

post #1361 of 1973
Quote:
Originally Posted by thiru View Post
Hi guys,
I've finally unlocked the 4th core on my 720 (first time I flashed my BIOS so I was a bit apprehensive), but it wasn't stable enough on stock voltage (BC2 crashed and Prime95 both crashed after about half an hour).

What voltage/settings should I put to test if the 4th core is going to work? I don't plan on overclocking yet (stock HSF), so I'm just asking for a safe "max" voltage, if it's good with Prime95 I'll work on lowering the voltage from there.
And what's the default voltage on this CPU?
Thanks.
The stock voltage is 1.325 if I remember correctly. It's good all the way up to 1.55, probably safe to stay under 1.5 for everyday use as well as having that fourth core unlocked. Try anything you can up to 1.55 to get that chip stable and you'll know if it is or isn't.
    
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post #1362 of 1973
You can add BioStar TA785G3 V6.3 with bios 88GAP331.

BioStar release a 421 bios but no not much information besides "F6 unlcoKING"

No SS at the moment but I have a CPU-Z validation.
http://valid.canardpc.com/show_oc.php?id=1179559
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post #1363 of 1973
I want one
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post #1364 of 1973
Quote:
Originally Posted by jtluongo View Post
I want one
As the OP says, unlocking cores is a bonus, not a feature
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post #1365 of 1973
Hey guys, I just joined the forum to report my unlocked Phenom 555 BE x2 to B55 BE x4 . I built this thing just last week.

Motherboard was a GA 785GMT-USB3 with F2 BIOS

It's stable, didn't have to do much (simply chose Hybrid firmware on ACC, then OC'ed it to 3.8 GHz via multiplier), then tweaked my memory to 7-8-7-24 1T command. My GPU will come today from Newegg (MSI 5750; this is just a mid-range system ATM till I upgrade to Phenom 6 cores) so I hope I can keep my OC and fairly odd but stable RAM timings with the vid card.

Link: http://valid.canardpc.com/show_oc.php?id=1181466
Edited by chillmelt - 5/12/10 at 12:37am
    
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post #1366 of 1973
Hi guys, i am new to this forum so i greet everyone here... i've been watching around the forum but i decided to join as this is a great community!

I've assembled a media center PC with the following main components:

- Asus M4A89GTD PRO (not the USB3 one)
- NOX 450W Power Supply
- AMD Phenom II 550 C3 revision (not the Black Edition one)
- 2x2GB Kingston HyperX 1333 DDR3
- 2x Samsung 250GB in RAID 0

I couldn't unlock the 4 cores simultaneously at the begining, but after i've spent some time trying different core unlocking combinations, i've become quite surprised and amazed by results.. they're quite strange:

Unlocked Cores: 0,1 (standard) - OK
Unlocked Cores: 0,1,2,3 - FAIL (system reboots on windows 7 logo)
Unlocked Cores: 0,1,2 - FAIL(system reboots on windows 7 logo)
Unlocked Cores: 0,1,3 - FAIL (system reboots on windows 7 logo)
Unlocked Cores: 0,2,3 - OK (this is the surprising part.

The Cores 2 and 3 work quite stable, they're fully used by windows. So by now i'm running the cores 0, 2 and 3 overclocked from 3.1 to 3.56 Ghz, with stock amd cooler. (not very cool (about 55º full load) because i don't have case coolers... i've ordered 2 silent ones but still weren't delivered to me).

BIOS Settings:

CPU bus speed: 230 Mhz
CPU offset voltage = 1.47 (ajusted automatically by the MOBO)
CPU VDDA voltage = 2.496 (auto)
CPU/NB offset voltage = 1.2 (auto)
DRAM Voltage = 1.543 (auto)
NB Voltage = 1.18 (auto)
SB Voltage = 1.1 (auto)
SidePort Memory Voltage = 1.5 (auto)

CPU LoadLine Calibration = Enabled
CPU/NB LoadLine Calibration = Enabled
CPU Spread Spectrum = Enabled

Memory is currently underclocked at ~= 1227 MHZ (if i increase it, the computer won't even POST)

My questions are, and i would appreciate your help very much:

- All the cores prove to work... core 0 an 1 work together, 0,2 and 3 also work together. The thing is... i cannot manage to put the core 1 working together with the other cores... what can i do to put them work together (all cores unlocked)??

- I tried to increase the voltage of the Memmory to 1.6v and 1.7v (the memory specification of Kngston says it can take 1.7v) in order to increase its frequency, but after reboot, the mobo can't do it.. it keeps it around 1.5v. Why is this happening?

- Isn't it a bit too much 1.47v too much for the CPU?? Will this voltage damage the processor?

Thanks
Edited by xtech - 5/12/10 at 6:38am
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post #1367 of 1973
Have you tried increasing the CPU voltage when you unlock all 4 cores?
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post #1368 of 1973
i've tried with the 1.47v... not more because it'sfar more than the amd max voltage value.

by now i've managed to run cores 0,2 an 3 at 1.428v, stable. But still can't manage to get core 1 to run.
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post #1369 of 1973
Quote:
Originally Posted by xtech View Post
i've tried with the 1.47v... not more because it'sfar more than the amd max voltage value.

by now i've managed to run cores 0,2 an 3 at 1.428v, stable. But still can't manage to get core 1 to run.
That's weird. Maybe the "connections" between core 1 and 2/3 are defective, but then again I have no idea how Phenoms work.

Have you tried other modes? Mine has auto/manual/all cores. I suppose you've tried manual and another one, what about the 3rd?
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post #1370 of 1973
Yes, i am also suspecting of it... maybe some connection between core 1 and 2,3 is not working... i don't know the phenom II architecture, too. But the fact is that this is quite strange, i've searched all over the internet and i can't find anyone with the same problem. Maybe i'm not playing correctly with the voltages and bios settings...

The bios allows to activate core unlocker. If i activate, then it has modes Manual/Auto. If I select Manual, i have the chance to enable or disable individually the cores 1,2,3,4,5 (the mobo supports the Phenom X6 also..).
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