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**Ivy Bridge Overclocking Guide** (with LN2 Guide at The End) - Page 116

post #1151 of 1508
Quote:
Originally Posted by Jpmboy View Post

It's actually quite common IF you have LLC set to max compensation of vdroop. It also can be quite varible between manufacturers and even within a manufacturer with a new bios. Vdroop is a good thing and i would advise to not defeat this engineering solution intel spent quite some time developing. Running LLC at max effect? Why?

Barkeater is right. If you want to poke around the voltage limits, get a DMM.

Thank you for your answers. I had LLC set to Auto then set to Turbo. I'm not using it on the extreme setting. If i use fixed vcore or auto vcore the cpu auto-volts like crazy, i.e.: i use 1.32v for 4.5GHz and it's stable. But if i set it to auto at 4.5, it goes from 1.2-1.3 to 1.404v at times under load, although it doesn't need that much.
Edited by devilpriest - 3/26/13 at 2:27am
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post #1152 of 1508
Quote:
Originally Posted by devilpriest View Post

Thank you for your answers. I had LLC set to Auto then set to Turbo. I'm not using it on the extreme setting. If i use fixed vcore or auto vcore the cpu auto-volts like crazy, i.e.: i use 1.32v for 4.5GHz and it's stable. But if i set it to auto at 4.5, it goes from 1.2-1.3 to 1.404v at times under load, although it doesn't need that much.

You should never set vcore to auto while overclocking, will ususlly overvolt the chip. Switch to offset mode set LLC at "75%" and put in the lowest value the offset voltage will accept. increase multiplier until it will post but not load windows... Add one notch of offset,repeat... Other settings such as sleepstates as you would for an oc... Test with p95.
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post #1153 of 1508
Quote:
Originally Posted by Jpmboy View Post

You should never set vcore to auto while overclocking, will ususlly overvolt the chip. Switch to offset mode set LLC at "75%" and put in the lowest value the offset voltage will accept. increase multiplier until it will post but not load windows... Add one notch of offset,repeat... Other settings such as sleepstates as you would for an oc... Test with p95.

I don't use auto vcore when overclocking, that was just to see how much it overvolts. Like I said, if I use offset, it still overvolts alot, only in fixed mode it only goes up a notch or two; but in offset mode it still goes way up... like when I use +0.000v for 4.5GHz (on my chip that should be somewhere around 1.330v, it still goes up to 1.390v). Will test further and see how that goes.
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post #1154 of 1508
Well, some progress to report.

Cleared CMOS, re-configured overclock. 4.5ghz, 1.28vcore, XMP2. About 2 hours stable on P95 standard test.

However, when I try to run P95 on custom blend at 90% RAM, I get several workers that don't start due to "Error allocating memory for FFT data". Reducing the amount of RAM gradually reduces this to one worker and eventually all workers run at 8gb of RAM active. I've done a search on this and came up with some posts over on the Stable / Suicide Club thread and checked some of the suggested solutions.

I have a system managed swap file, although it's not on my SSD C drive - it's located on my Raptor drive (E). I don't think that should create a problem, right?

I ran Memtest overnight with the overclock settings active in BIOS. 3 full passes, no errors.

Any suggestions on getting past the "Error allocating memory for FFT data" problem?
post #1155 of 1508
Quote:
Originally Posted by Jpmboy View Post

Nah, droop and drop have been around much longer than speedstep or offset. Droop only comes on at load, and LLC reverses the load vs vcore lowering algorithm of droop, again only in effect at load. Defeating droop is not advisable especially when running 100% cpu load 24/7.

My offset oc with LLC at 50% has a rock stable idle.... Load vcore will float 20-40mV for 46 @1,328, same for 48. I can't get 50 using offset/turbo, only fixed, then LLC at 75%. I shoot for the lowest LLC compensation possible.

Yeah, I'm not confused as to what vdroop is either. By the way, vdroop is not an algorithm or a feature. You may want to double check your understanding of why there is a difference in the voltage at load vs. the target (i.e., set) voltage.

I understand you like to use as little llc as possible. If that is what works for you, great. However, I do think devilpriest is still trying to get his head around these terms and how they work.

Quote:
Originally Posted by devilpriest View Post

I don't use auto vcore when overclocking, that was just to see how much it overvolts. Like I said, if I use offset, it still overvolts alot, only in fixed mode it only goes up a notch or two; but in offset mode it still goes way up... like when I use +0.000v for 4.5GHz (on my chip that should be somewhere around 1.330v, it still goes up to 1.390v). Will test further and see how that goes.

It doesn't make sense to use auto vcore, regardless. Not sure what you mean by "to see how much it overvolts" or how you intend to use that information in your oc.

I think your missing the point of the offset way to oc. There is no overvolting going on per se. Lets say for example that for a given oc of multiplier at 45 and bclk on 100 you have determined that you need a vcore of 1.3v to be stable at load. No matter how you want to set up your oc (i.e., offset or straight vcore) these conditions must be met for you to be stable. If you chose to use a straight vcore, but want to set the llc to something less than extreme, then you will have to add a little bit to the vcore to account for the corresponding droop to get you to 1.3v. If you chose to use offset, then you have more things to deal with as you must first determine what the vid value is when you are under load. You then use this value to determine your offset. If your vid under load in the example above is 1.2v, then your offset will be 0.1v plus whatever vdroop (which will depend on how you have llc set).

All this has been explained many times over in the preceding pages of this thread. I suggest you do a little more reading and try to get an understanding of what your trying to do and how to do it.
Edited by barkeater - 3/26/13 at 8:29am
post #1156 of 1508
Quote:
Originally Posted by devilpriest View Post

I don't use auto vcore when overclocking, that was just to see how much it overvolts. Like I said, if I use offset, it still overvolts alot, only in fixed mode it only goes up a notch or two; but in offset mode it still goes way up... like when I use +0.000v for 4.5GHz (on my chip that should be somewhere around 1.330v, it still goes up to 1.390v). Will test further and see how that goes.

That is way off. Something is wrong with the control of vcore. Have you installed the new bios? ...sorry if you answered that already.
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post #1157 of 1508
Quote:
Originally Posted by Jpmboy View Post

That is way off. Something is wrong with the control of vcore. Have you installed the new bios? ...sorry if you answered that already.

I have the latest non-beta bios. Could be something wrong with my mobo, seeing how I managed to get some bent pins and then have them straightened out at my local service. It could be because of that. Oh, well. Seems like using High LLC instead of Turbo LLC has somewhat managed the problem; now I get around 1.344-1.356v on 4.5GHz, it doesn't go 1.390v or 1.404v anymore, so that's a step forward. Thank you for your help.
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post #1158 of 1508
Quote:
Originally Posted by barkeater View Post

Yeah, I'm not confused as to what vdroop is either. By the way, vdroop is not an algorithm or a feature. You may want to double check your understanding of why there is a difference in the voltage at load vs. the target (i.e., set) voltage. .

So you know vdroop to be something other than a motherboard complying with intel's power supply specification? Voltage and current?
Old, but still in effect:

See: www.anandtech.com/show/2404/5
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post #1159 of 1508
Quote:
Originally Posted by devilpriest View Post

I have the latest non-beta bios. Could be something wrong with my mobo, seeing how I managed to get some bent pins and then have them straightened out at my local service. It could be because of that. Oh, well. Seems like using High LLC instead of Turbo LLC has somewhat managed the problem; now I get around 1.344-1.356v on 4.5GHz, it doesn't go 1.390v or 1.404v anymore, so that's a step forward. Thank you for your help.

You are very welcome. I hope it works out right.
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i7 5960X i7 6950X Asus Rampage V Extreme (STD and model-10) 2 GTX TitanXp 
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2 GTX Titan X Pascal GSkill 3200c14 TZs 8x8GB @ 3400c13 Intel 750 NVMe 400GB 2x Plextor SSD 256 Raid 0 (Win 7) 
Hard DriveOptical DriveCoolingCooling
Samsung NVMe 950 Pro M.2 Plextor 810 Aquacomputer GiGant 1680 (4x420) external Rad XSPC RX360 
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Koolance 380i Laing DDC-1T (2) Koolance EXC-800 Chiller Windows 10 x64  
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Windows 7 Pro Linux Mint ASUS Swift 1440P 144Hz Seiki 50" 4K monitor (720P-2160i) 240-30Hz 
KeyboardPowerCaseMouse
Das Keyboard Model S Pro Corsair AX1500i MicroCool Banchetto 101 Steelseries Rival 
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Ultimate Ears TF10 Koolance Pump/Fan Controller 
CPUCPUCPUMotherboard
i5 6600K i7 7700K i3 7350 ASUS Max iX APEX, Asrock MOCF, M8Impact 
GraphicsGraphicsGraphicsRAM
ASUS GTX 1080 Turbo ASUS GTX 960 Mini EVGA GTX 550Ti G.Skill 3600c15 
RAMHard DriveHard DriveHard Drive
G.Skill 4266c19 Samsung SM951 WD VR 300 Intel 750 NVMe U.2 
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Mushkin 512 Intel 600 NVMe Raid0 Plextor DVD ROM Custom Water (Koolance 380i / XSPC 360v2) 
CoolingOSOSOS
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Seiki 4K AOC 1080P Ducky Cherry Black Silverstone 500W SFX form factor/ Seasonic 760W 
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Bench Logitech G700s Ultimate Ears TF10s 
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7740X ASUS Rampage Apex Various G.Skill 3600c15 2x8GB kits 
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post #1160 of 1508
Quote:
Originally Posted by SDBolts619 View Post

Well, some progress to report.

Cleared CMOS, re-configured overclock. 4.5ghz, 1.28vcore, XMP2. About 2 hours stable on P95 standard test.

However, when I try to run P95 on custom blend at 90% RAM, I get several workers that don't start due to "Error allocating memory for FFT data". Reducing the amount of RAM gradually reduces this to one worker and eventually all workers run at 8gb of RAM active. I've done a search on this and came up with some posts over on the Stable / Suicide Club thread and checked some of the suggested solutions.

I have a system managed swap file, although it's not on my SSD C drive - it's located on my Raptor drive (E). I don't think that should create a problem, right?

I ran Memtest overnight with the overclock settings active in BIOS. 3 full passes, no errors.

Any suggestions on getting past the "Error allocating memory for FFT data" problem?

How much free ram do you have after booting your system? HWMonitor, or open hardware monitor will tell you, so will several other utilities. Open hardware monitor is a bery good open source utility.
x99
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z170/z270
(27 items)
 
x299
(10 items)
 
CPUCPUMotherboardGraphics
i7 5960X i7 6950X Asus Rampage V Extreme (STD and model-10) 2 GTX TitanXp 
GraphicsRAMHard DriveHard Drive
2 GTX Titan X Pascal GSkill 3200c14 TZs 8x8GB @ 3400c13 Intel 750 NVMe 400GB 2x Plextor SSD 256 Raid 0 (Win 7) 
Hard DriveOptical DriveCoolingCooling
Samsung NVMe 950 Pro M.2 Plextor 810 Aquacomputer GiGant 1680 (4x420) external Rad XSPC RX360 
CoolingCoolingCoolingOS
Koolance 380i Laing DDC-1T (2) Koolance EXC-800 Chiller Windows 10 x64  
OSOSMonitorMonitor
Windows 7 Pro Linux Mint ASUS Swift 1440P 144Hz Seiki 50" 4K monitor (720P-2160i) 240-30Hz 
KeyboardPowerCaseMouse
Das Keyboard Model S Pro Corsair AX1500i MicroCool Banchetto 101 Steelseries Rival 
AudioOther
Ultimate Ears TF10 Koolance Pump/Fan Controller 
CPUCPUCPUMotherboard
i5 6600K i7 7700K i3 7350 ASUS Max iX APEX, Asrock MOCF, M8Impact 
GraphicsGraphicsGraphicsRAM
ASUS GTX 1080 Turbo ASUS GTX 960 Mini EVGA GTX 550Ti G.Skill 3600c15 
RAMHard DriveHard DriveHard Drive
G.Skill 4266c19 Samsung SM951 WD VR 300 Intel 750 NVMe U.2 
Hard DriveHard DriveOptical DriveCooling
Mushkin 512 Intel 600 NVMe Raid0 Plextor DVD ROM Custom Water (Koolance 380i / XSPC 360v2) 
CoolingOSOSOS
Corsair H80iV2 (M8I) Windows 10 Pro Window 7 Linux Mint 
MonitorMonitorKeyboardPower
Seiki 4K AOC 1080P Ducky Cherry Black Silverstone 500W SFX form factor/ Seasonic 760W 
CaseMouseAudio
Bench Logitech G700s Ultimate Ears TF10s 
CPUMotherboardGraphicsRAM
7740X ASUS Rampage Apex Various G.Skill 3600c15 2x8GB kits 
Hard DriveCoolingOSKeyboard
Samsung 960 Pro, NVMe Custom Water Windows 10 Razor Black Widow 
PowerCase
Seasonic 1000 Platinum, Corsair 1500i none :-) 
  hide details  
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x99
(26 items)
 
z170/z270
(27 items)
 
x299
(10 items)
 
CPUCPUMotherboardGraphics
i7 5960X i7 6950X Asus Rampage V Extreme (STD and model-10) 2 GTX TitanXp 
GraphicsRAMHard DriveHard Drive
2 GTX Titan X Pascal GSkill 3200c14 TZs 8x8GB @ 3400c13 Intel 750 NVMe 400GB 2x Plextor SSD 256 Raid 0 (Win 7) 
Hard DriveOptical DriveCoolingCooling
Samsung NVMe 950 Pro M.2 Plextor 810 Aquacomputer GiGant 1680 (4x420) external Rad XSPC RX360 
CoolingCoolingCoolingOS
Koolance 380i Laing DDC-1T (2) Koolance EXC-800 Chiller Windows 10 x64  
OSOSMonitorMonitor
Windows 7 Pro Linux Mint ASUS Swift 1440P 144Hz Seiki 50" 4K monitor (720P-2160i) 240-30Hz 
KeyboardPowerCaseMouse
Das Keyboard Model S Pro Corsair AX1500i MicroCool Banchetto 101 Steelseries Rival 
AudioOther
Ultimate Ears TF10 Koolance Pump/Fan Controller 
CPUCPUCPUMotherboard
i5 6600K i7 7700K i3 7350 ASUS Max iX APEX, Asrock MOCF, M8Impact 
GraphicsGraphicsGraphicsRAM
ASUS GTX 1080 Turbo ASUS GTX 960 Mini EVGA GTX 550Ti G.Skill 3600c15 
RAMHard DriveHard DriveHard Drive
G.Skill 4266c19 Samsung SM951 WD VR 300 Intel 750 NVMe U.2 
Hard DriveHard DriveOptical DriveCooling
Mushkin 512 Intel 600 NVMe Raid0 Plextor DVD ROM Custom Water (Koolance 380i / XSPC 360v2) 
CoolingOSOSOS
Corsair H80iV2 (M8I) Windows 10 Pro Window 7 Linux Mint 
MonitorMonitorKeyboardPower
Seiki 4K AOC 1080P Ducky Cherry Black Silverstone 500W SFX form factor/ Seasonic 760W 
CaseMouseAudio
Bench Logitech G700s Ultimate Ears TF10s 
CPUMotherboardGraphicsRAM
7740X ASUS Rampage Apex Various G.Skill 3600c15 2x8GB kits 
Hard DriveCoolingOSKeyboard
Samsung 960 Pro, NVMe Custom Water Windows 10 Razor Black Widow 
PowerCase
Seasonic 1000 Platinum, Corsair 1500i none :-) 
  hide details  
Reply
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