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Biostar Z68 power limit and other advice needed.

post #1 of 4
Thread Starter 
I'm working with a Biostar TZ68A+ motherboard and 2500K. (Which were both bought here on OCN. Thanx again to MrLinky and Dustin1)
Got it going great so far though I haven't really fine tuned much, just shooting for high clocks. I have 4738MHz (103x46) as of now with the following being some of the most important settings:
Vcore: 1.45
VccSA: 0.93
VccIO: 1.175
PLL: 1.8 (can't set below 1.8 - options are auto, 1.8, 1.9, 2.0, 2.1)
DRAM: 1.65 (this could be lowered)
Power limit [AMP]: 120 (max allowed)
Power Limit [Watt]: 200

With all that being said, here are my questions/concerns:
I am unsure of the needed settings from VccSA, VccIO, and honestly Vcore as well. I've just been moving things around! Also, and this is the big one, this board has 4+1 phase cpu power which leads me to ask what would be a maximum safe power limit setting on the cpu watt portion? I read a guide that said 200w for Biostar boards so I've been going with that so far.
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post #2 of 4
Just set the power limit as high as it goes. Keep in mind it doesn't automatically draw that much power, it's just the limit. Even though it's 4+1 phase I'm sure you're fine for some pretty heavy OCing. A good example I like to use is the 4+1 phase DFI M2RSH a Phenom II quad (45nm heavy power consumption at this voltage/frequency to the limits). It's about the quality, not quantity and Biostar usually seems pretty good. Their 890FX is only like 4+2 phase or something and it works great as well.

For settings, vcore varies wildly depending on how well the chip overclocks. VccSA does not need to be touched, and VCCIO voltage (basically CPU memory controller voltage) may need an increase when running higher frequency RAM or all slots populated. For 1600mhz you should be fine with it on auto or around 1.1v should be plenty.
Edited by Dopamin3 - 10/8/11 at 8:28pm
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post #3 of 4
Thread Starter 
It looks like I may be reaching the limit with this chip I suppose. I noticed that between 4.3-4.7GHz it took quite a push in vcore to get it where it is. I'm using between 1.42-1.44v for 4.7GHz, and it took a hefty 1.48v to get it to pass some stability testing at 4.8GHz.
I'll probably wait til I get my Rasa kit back together before I push further. It's running up to 74C under P95 load at 4.7 and as high as 80C at 4.8!
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Lounge Machine
(17 items)
 
Doc Wallace
(14 items)
 
Cap'n Crunch
(12 items)
 
CPUMotherboardGraphicsRAM
Core i5-2500K @ 4.70 GHz Asus P8P67 Pro XFX Double D R9 280 [1200/1600] 8GB G.Skill Sniper DDR3-2133 [9-11-10-28] 
Hard DriveHard DriveOptical DriveCooling
Mushkin Chronos 120GB SATA3 Samsung Spinpoint F3 500GB Asus DRW-24B1ST XSPC Rasa 750 RS240 
OSMonitorKeyboardPower
Windows 7 Pro x64 Asus VH236H Rosewill RK-7300 Rosewill RX750-S-B 
CaseMouseAudioOther
Lancool PC-K62 Logitech Mx518 Realtek HD 192KHz Visiontek Killer 2100 NIC 
CPUMotherboardGraphicsRAM
Phenom II X4 955 @ 3.80 GHz ASRock 770iCafe AM3+ EVGA Geforce GTX 460 1GB 8GB G.Skill Sniper 1866 
Hard DriveHard DriveOptical DriveCooling
Corsair Nova 30GB WD Caviar Blue 640GB Lite-On DVDRW Corsair H50 
OSMonitorPowerCase
Windows 7 Pro x64 Asus VH236H Corsair CX430 Diablotek EVO RPA-6170 
Mouse
Logitech LX3 
CPUMotherboardGraphicsRAM
Xeon 3060 @ 3.6GHz MSI P35 Platinum EVGA Geforce GTS 250 512MB 2GB OCZ Fatal1ty + 2GB ADATA Premier DDR2 
Hard DriveOptical DriveCoolingOS
Samsung HD161HJ DVDRW Xigmatek Dark Knight Windows 7 Home Premium x64 
MonitorPowerCaseMouse
Compaq S1922A Cheifmax 650W Raidmax Smilodon EB Logitech LX3 
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post #4 of 4
Aloha
any more progress on this?
I have the same mobo cpu setup.
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