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Clock brick wall

post #1 of 11
Thread Starter 
For some reason, 5GHz was working and passing every test I threw at it, but a lot of my applications were crashing. Normal?
And to get to 5GHz from 4.9GHz, it took substantially more VCore. It would pass everything with a relatively small increase, but to stop everything from crashing, I had to go up to around 1.6v (which is a little high.)
post #2 of 11
Best test, after you do all the tests, is to use the computer normally, and if it crashes, you have an unstable overclock, and yes 1.6v is very high.
 
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BitoHeaven
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post #3 of 11
Thread Starter 
Okay, damn. I was really hoping to surpass the 5GHz mark. Luck of the draw...
post #4 of 11
What are ALL of your settings? Maybe we can actually help.

When you get to clocks this high, there are a few other contributing factors.
post #5 of 11
Thread Starter 
Everything is auto except VCore and multiplier.
VCore is set to offset, currently at +0.21v x49 (I think this can be lowered a bit, still stress testing)
Speedstep/turbo is turned on.
Edited by Powermonkey500 - 10/18/12 at 7:04pm
post #6 of 11
Have you tried to lower your PLL at all?
post #7 of 11
Thread Starter 
I have not. How much should I try lowering it?
post #8 of 11
Your PLL controls vdroop, set that at second highest setting, if it's at the highest setting, it may cause instability.
 
BitoHeaven
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BitoHeaven
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Cigar ATX PC
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CPUMotherboardGraphicsGraphics
Intel i7 4770k @ 4.5GHz Asus Maximus VI Gene Gigabyte R9 290 @ 1160MHz/1350MHz Gigabyte R9 290 @ 1160MHz/1350MHz 
RAMHard DriveHard DriveOptical Drive
G.Skill Trident X 2X8GB DDR3 2400MHz Samsung 840 PRO 256GB  Seagate Barracuda 7200.14 3TB SATA III 6Gb/s 64... Pioneer Blu-ray Burner 
CoolingOSMonitorKeyboard
Liquid Single Loop Triple Radiators Win 7 SP1 Professional x64bit  Samsung SynchMaster 24" Widescreen 1200p TFT-LC... Logitech G15 
PowerCaseMouseMouse Pad
EVGA SuperNOVA G2 1300w 80+ Gold Fully Modular  Fractal Design Arc Midi R2 Microsoft Sidewinder X5 Allsop Redmond Mouse Pad 
Audio
Cambridge Soundworks 5.1 
CPUMotherboardGraphicsRAM
Intel Core i5-3570K @ 4.6GHz ASRock Z77E-ITX mITX  Sapphire HD 7990 @ 1090MHz/1600MHz G.SKILL Ripjaws 2X4GB DDR3-1600 @ 1866MHz 
Hard DriveHard DriveOptical DriveCooling
Crucial SSD 128GB mSATA SATA III 6GB  Seagate Barracuda 7200.12 1TB SATA II 32MB 7200RPM LG DVD R/W SATA with LightScribe Corsair Cooling Hydro Series H100 
OSMonitorKeyboardPower
Win 7 Professional x64bit Samsung 52" 1080p 60Hz LCD Logitech Wireless K330 Corsair AX850 Gold Fully Modular 
CaseMouseMouse PadAudio
BitFenix Prodigy Mini-ATX Black  Logitech Wireless M215 Corsair Vengeance MM200 Yamaha RX-V681 & PSB/Polk Audio 5.1 
CPUMotherboardGraphicsRAM
AMD Athlon II X4 640 ASRock N68C-GS NVIDIA 6600GT G. Skill Ripjaws DDR3 1600MHz 
Hard DriveOptical DriveCoolingOS
WD Caviar Blue 500GB 16MB Cache 7200RPM LG Optical Drive Thermaltake Max Orb Windows 7 
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post #9 of 11
no llc controls helps to eliminate vdroop
pll voltage:
VCCPLL: Commonly known as CPUPLL, this voltage is for the internal clock generator for the CPU. Intel states maximum at 1.89v, and stock at 1.8v.

What does the PLL do, you ask? Here is how you get 3.4 GHz. A constant frequency input (BLCK) is generated by the PCH (P67), the BLCK is then multiplied by the core ratio by the internal phase lock loop (PLL) and then you have a greater resulting core frequency. CPU PLL is the PLL that gives you 3.4 GHz at stock and 5.2 GHz overclocked.
I would leave this voltage at stock, at one point I thought this voltage helped me lower Vcore, but it was just the processor playing tricks on me. In fact on X58 systems lowering the CPU PLL was thought to help lower temperatures and thus improve stability, on the other hand at very high frequencies this voltage is creased by many overclockers. I say increase it to 1.89v if you like, but don’t go north of that, if you want to save power and keep temperatures low turn it down to 1.71v.

^^^this credited to the great "Sin082"

*EDIT* if you want to know what all the voltages do, look at Sin's post from the ga p67a-ud7 b3 review, namely the 2nd post
http://www.overclock.net/t/910467/the-ultimate-sandy-bridge-oc-guide-p67a-ud7-performance-review#post_11945966
Edited by pc-illiterate - 10/18/12 at 7:27pm
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post #10 of 11
In the case of my z68 E3G3, 5ghz stability REQUIRES me to lower PLL to its minimum of 1.586.


I recommend playing with it a little to see if it helps.
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