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post #2161 of 9343
Going to find a replacment for my Vanilla P8P67 so that I can SLI.

I'm heading over to Canada Computers.
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post #2162 of 9343
Quote:
Originally Posted by slimex;14280023 
What other BIOS Settings do you use ? I mostly really don't know, what is needed or what is useful to set. Are there other options, which lower my CPU temperature. No problem if this is too much work to look it all up, but it would be nice to know.
Here are all of my settings. I can't take screenshots because I always end up with giant black horizontal bars that block most of each screenshot.

These are my not yet fully tested settings for 4.8GHz:


Ai Tweaker:
  • Ai Overclock Tuner: Manual
  • BLCK/PCIE Frequency: 100.0
  • Turbo Ratio: By All Cores
  • By All Cores: 48
  • Internal PLL Voltage: Enabled
  • Memory Frequency: DDR3-1866MHz
  • EPU Power Saving Mode: Disabled
  • DRAM Timing Control: 9-11-9-28-1T
  • EPU Power Saving MODE: Disabled


Ai Tweaker > CPU Power Management:


I have everything at the default settings. Enhanced Intel SpeedStep Technology is enabled, Turbo Mode is enabled, CPU C1E is enabled, CPU C3 Report is enabled, and CPU C6 Report is enabled.



Back to the main Ai Tweaker area:


DIGI+ VRM
  • Load-Line Calibration: Ultra High
  • VRM Frequency: Manual
  • VRM Fixed Frequency Mode: 350
  • Phase Control: Extreme
  • Duty Control: Extreme
  • CPU Current Capability: 140%
  • CPU Voltage: Offset Mode
  • Offset Mode Sign: +
  • CPU Offset Voltage: 0.035V
  • DRAM Voltage: 1.5000
  • VCCSA Voltage: Auto
  • VCCIO Voltage: 1.15625V
  • CPU PLL Voltage: Auto
  • PCH Voltage: Auto
  • CPU Spread Spectrum: Enabled


I previously had the CPU Offset Voltage at 0.030V, but it only lasted 7 hours and 16 minutes of Prime95's Blend test. So I increased it to 0.035V with the plan to test sometime soon.

I keep all these settings saved in a Microsoft Word document. smile.gif

Quote:
Originally Posted by Durden;14280457 
Been away from the boards for a few days so catching up with everything... So if i'm repeating something please say. Also I'm just mentioning this because i was caught out and in no mean to say 'duh u try dis!!!?' but when you enter the manual volts do you actually hit enter?

One reason it may not be sticking is that your entering the value and then just exiting without hitting enter on the value. Volts will only fluctuate that high if its on Auto.. I overclocked my processor with the multiplier and left everything on Auto to see how much the processor and board thought it needed to run that speed and it was riding to 1.48v
This!

I learned the hard way that pressing Enter after typing a value is required! This applies to every last part of the UEFI where you can type values in, including when you want to save a profile.

Quote:
Originally Posted by Durden;14280554 
What volts were the tests running upto to get those sort of temps?

From everything I've been reading on 1.4v is the number to keep bellow for 24/7 use as long as the temps arent too high (bellow 72C if i remember correctly)
ASUS' Senior Technical Marketing Specialist (JJ) recommends staying under 1.425V for more of a permanent setting. Although, 1.525V is basically the maximum.

Regarding temps: 72.6°C is just the Thermal Specification. It's measured on the topside at the "geometric center" which is basically the exact same spot where we apply that first bit of thermal interface material. So the maximum safe core temperature is actually 98°C which is the Tj. Max of these CPUs. This is the temperature where the CPU would (and should) either throttle itself down or turn itself off.

Quote:
Originally Posted by slimex;14281728 
Hello Durden,

Now I finally am at home and can post some real values, not the cloudy rememberings of the day before yesterday biggrin.gif.

I just started an in place large fft test in prime95 using 8 threads. Now my CPU Cooler fans are at maximum rpm (1500) and the cpu temp is fluctuation between 68°C and 69°C. The automatic vcore is at 1,344V and sometimes goes up to 1,352 for very short periods of time. The motherboard temp is at constant 33°C. The values are from ASUS Ai Suite II. Core Temp shows core temperatures fluctuating between 65°C and 71°C.

My CPU cooler fans ar blowing air from the outside to the inside of the case and I am not using the Corsair 2500rpm stock fans. Using them I had much better cooling potential of course and it was no problem to run this values with cpu temp staying under 62°C with the fans running at 2000rpm or so.

I am running the present configuration prime stable, tested for about 4 hours with Nvidia demo endless city running at the same time. Case Temperatures went up to 45°C then and CPU temp sometimes reached 72°C, cause both 580s were under constant load (Afterburner shows values over 95% for the load for each card all the time). Room temperature was 24°C, a very high value for my means, doesn't get any hotter normally. I think if I would raise the multiplier further, I would have to use fans with more airflow, which are louder.

Prime95 is a synthetic benchmark. During normal use like playing games or writing documents, surfing the internet or watching videos or movies, I never get this high CPU load. So I hope, I will not have to clock down when the room temperature rises a few °C.

After testing I played Crysis 2 for another 4 hours, my cpu temperature went down to values lower than 60°C and the PC was again perfectly stable.

Without the graphics cards under load, the pc is very silent, despite the cpu is under full load. I would not like to raise noise if possible.

In my case I got these fans:

front: 230mm 700rpm, running at 400rpm
side: Cooler Master Megaflow 200mm 700rpm, running at 400rpm
top: 2x Cooler Master Megaflow 200mm 700rpm, running at 400rpm
graphics card air duct: Enermax 120mm 1400rpm, running at 850rpm
all these fans are connected to a Scythe Kaze Server fan controller and spin up to full rpm, as soon as the graphics cards are under load. Therefore at the moment they are at the low rpm state.

Without having any comparison yet, I would say, this is enough airflow and normal case temps.

The test runs for 47 mins now, the temps and values are still the same. Now I will start the nvidia demo endless city and post the temps and values in an hour or so.

turrican9, THX for adding me smile.gif
It's actually not a good idea to make the system do other things while a CPU or CPU/memory stress test is running. This is because anything else that runs forces the CPU to share CPU cycles between everything. I've seen people say that when their stress test is only lasting a few hours, they can get it to last longer by doing other things at the same time.

So when you run Prime95, it's best to just leave the computer alone. Actually, I also recommend disabling anything that might steal CPU cycles while you're away, such as the screensaver, Windows Update, the Desktop Slide Show, etc.

Finally: it seems to be the general consensus that 12 hours of Prime95's Blend test is the absolute best stress test for Sandy Bridge.
Edited by TwoCables - 7/20/11 at 10:16am
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post #2163 of 9343
Quote:
Originally Posted by Durden;14282125 
I would say when overclocking the Chip i would avoide running stress tests on the graphics cards aswell. (if anyone else thinks this is wrong advice please do say...) The reason i say this is because you'll need to make sure the CPU is stable first before doing any other clocks. Its why most guides state even putting Ram to auto or the lowest setting. Once you know your safe that the CPU is stable then stress the graphics cards as they should never (unless your editing big videos) be under that type of stress.

Also I've been doing some reading and most people have said that blend tests are all thats needed. Though when i started i was doing small FFTs as this would result in quicker BSODs

I'm away now but hope you can get a stable overclock smile.gif will catch up soon!

I tested this graphics card values with bios at optimized defaults and cpu on standard clock for several hours before. There is no overclock on those, but they are undervolted from 1,0V (which I think could be under reference voltage from nvidia) to 0,963V to avoid unnecessary heat emission. With stress testing both cpu and graphics card I wanted to simulate the worst ever possible situation, I stress tested the CPU alone for 1 hour or so alone before, which is not enough I agree.

The current setup was finally not stable. Yesterday evening I changed my RAM voltage from 1,65V to 1,6V. Did not remember, that I wanted to stress test this first. So after 1 hour of Prime 1 worker had an error.
Then I switched it back to 1,65V to have my last stable configuration again and started some stress testing again to determine temperatures.

As I am too lazy to write down all these numbers, here is a screenshot:

40b8e3a4c5.jpg

On the screenshot, the test ran for about 48 minutes, from there till now it ran another 35 minutes without errors or changing temps etc.. The open program windows should give an overwiew of config and especially temperatures. I think it could run stable if I let it run, had tested with this config for 4 h and more before.

The system runs perfectly this way, am unsure if it makes any sense to overclock at all at the moment in terms of performance. But it is sort of fun to get more out of the hardware and see stable results.

@twocables:
thx for pasting all your config values, this will help if I change my plans and try to raise multiplier next time.

Heres my config:

Ai Tweaker > CPU Power Management:
These Options I left on Default

Ai Tweaker:
Ai Overclock Tuner: X.M.P
BLCK/PCIE Frequency: 100.0
Turbo Ratio: By All Cores
By All Cores: 46
Internal PLL Voltage: Auto
Memory Frequency: DDR3-2133MHz
EPU Power Saving Mode: Disabled
DRAM Timing Control: 9-11-9-28-1T

DIGI+ VRM
Load-Line Calibration: Auto
VRM Frequency: Auto
Phase Control: Extreme
Duty Control: Auto
CPU Current Capability: 100%
CPU Voltage: Offset Mode
Offset Mode Sign: +
CPU Offset Voltage: Auto
DRAM Voltage: 1.6500
VCCSA Voltage: Auto
VCCIO Voltage: Auto
CPU PLL Voltage: Auto
PCH Voltage: Auto
CPU Spread Spectrum: Auto

As you can easily see, there are a lot of automatic options, which shows, how little I have tried. At the moment I am a little bit afraid of raising temps or noise level, so I will leave ist be, if it runs stable. To determine, if it is, I will soon test without graphics load using Prime Blend. Thx for this suggestion @Durden & TwoCables

Will be away for today now, too. Perhaps I will make this blend test later.
Edited by slimex - 7/20/11 at 9:06pm
     
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post #2164 of 9343
Hi everyone!

I have a P8Z68-V and I was wondering if the third PCIe x16_3 would be ok for my second card on SLi at x8/x8 so they can be far from each other and stay cool or if its gonna be too slow to perform at x8 speed.

There is something here about it in the note section at the bottom but im not sure if that disqualifies the last pcie x16 for a sli in x8 speeds

Thanks in advance!
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post #2165 of 9343
I know that this is a huge post, but please please please bear with me. redface.gif
Quote:
Originally Posted by slimex;14283214 
I tested this graphics card values with bios at optimized defaults and cpu on standard clock for several hours before. There is no overclock on those, but they are undervolted from 1,0V (which I think could be under reference voltage from nvidia) to 0,963V to avoid unnecessary heat emission. With stress testing both cpu and graphics card I wanted to simulate the worst ever possible situation, I stress tested the CPU alone for 1 hour or so alone before, which is not enough I agree.

The current setup was finally not stable. Yesterday evening I changed my RAM voltage from 1,65V to 1,6V. Did not remember, that I wanted to stress test this first. So after 1 hour of Prime 1 worker had an error.
Then I switched it back to 1,65V to have my last stable configuration again and started some stress testing again to determine temperatures.
When I was picking parts for my Sandy Bridge upgrade, I was told to specifically and only look at 1.5V rated memory (or perhaps even lower than 1.5V). I was basically told that 1.65V is not good for Sandy Bridge because it has an Integrated Memory Controller. I don't know whether or not this means that 1.65V results in higher core temps than 1.5V, but I can only assume so (I'm not willing to test it at the moment because I don't want to disturb my system quite yet).

Quote:
Originally Posted by slimex;14283214 
As I am too lazy to write down all these numbers, here is a screenshot:

40b8e3a4c5.jpg

On the screenshot, the test ran for about 48 minutes, from there till now it ran another 35 minutes without errors or changing temps etc.. The open program windows should give an overwiew of config and especially temperatures. I think it could run stable if I let it run, had tested with this config for 4 h and more before.
After looking at your settings below, I am very curious: what does CPU-Z's Memory tab say? I mean, is your memory running at its correct clocks and timings?

Quote:
Originally Posted by slimex;14283214 
The system runs perfectly this way, am unsure if it makes any sense to overclock at all at the moment in terms of performance. But it is sort of fun to get more out of the hardware and see stable results.
It makes no sense for me to overclock, but damn: 4.8GHz with air cooling? Woo-hoo!!!!! hehehehe

Quote:
Originally Posted by slimex;14283214 
@twocables:
thx for pasting all your config values, this will help if I change my plans and try to raise multiplier next time.

Heres my config:

Ai Tweaker:
Ai Overclock Tuner: Manual
BLCK/PCIE Frequency: 100.0
Turbo Ratio: By All Cores
By All Cores: 48
Internal PLL Voltage: Enabled
Memory Frequency: DDR3-1866MHz
EPU Power Saving Mode: Disabled
DRAM Timing Control: 9-11-9-28-1T
EPU Power Saving MODE: Disabled
Hey, we have the same settings!

haha j/k tongue.gif

Quote:
Originally Posted by slimex;14283214 
Ai Tweaker > CPU Power Management:
These Options I left on Default

Ai Tweaker:
Ai Overclock Tuner: X.M.P
BLCK/PCIE Frequency: 100.0
Turbo Ratio: By All Cores
By All Cores: 46
Internal PLL Voltage: Auto
Memory Frequency: DDR3-2133MHz
EPU Power Saving Mode: Disabled
DRAM Timing Control: 9-11-9-28-1T

DIGI+ VRM
Load-Line Calibration: Auto
VRM Frequency: Auto
Phase Control: Extreme
Duty Control: Auto
CPU Current Capability: 100%
CPU Voltage: Offset Mode
Offset Mode Sign: +
CPU Offset Voltage: Auto
DRAM Voltage: 1.6500
VCCSA Voltage: Auto
VCCIO Voltage: Auto
CPU PLL Voltage: Auto
PCH Voltage: Auto
CPU Spread Spectrum: Auto

As you can easily see, there are a lot of automatic options, which shows, how little I have tried. At the moment I am a little bit afraid of raising temps or noise level, so I will leave ist be, if it runs stable. To determine, if it is, I will soon test without graphics load using Prime Blend. Thx for this suggestion @Durden & TwoCables

Will be away for today now, too. Perhaps I will make this blend test later.
For overclocking, always always always use "Manual" for the "Ai Overclock Tuner" setting.

Additionally, always use the following settings in DIGI+VRM:

Load-Line Calibration: High, Ultra High, or Extreme. Ultra High is best.
VRM Frequency: Manual
VRM Fixed Frequency Mode: 350
Phase Control: Extreme
Duty Control: Extreme
CPU Current Capability: 140% (I know it turns red, but we happen to know what we are doing, so ignore it)
CPU Voltage: Offset Mode
Offset Mode Sign: +
CPU Offset Voltage: Always manually set this. I tried Auto once, and I came extremely close to killing my CPU. Start with 0.005V and slowly work your way up in increments of 0.005V
DRAM Voltage: 1.6500 - we may need to find you some good 1.5V memory
VCCSA Voltage: Auto
VCCIO Voltage: You can raise this to values between 1.000V and 2.000V to help use a lower core voltage. It's recommended to stay under 1.200V.
CPU PLL Voltage: Auto
PCH Voltage: Auto
CPU Spread Spectrum: Enabled


Using these settings should be a tremendous help.
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i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
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It's a computer!
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CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
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Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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post #2166 of 9343
TwoCables thats some good stuff your posting smile.gif

So whats the deal with this "Internal PLL Voltage" option, Im assuming from what Ive been reading you need it enabled to get the high OCs?
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post #2167 of 9343
Quote:
Originally Posted by The Viper;14285433 
TwoCables thats some good stuff your posting smile.gif

So whats the deal with this "Internal PLL Voltage" option, Im assuming from what Ive been reading you need it enabled to get the high OCs?
Yeah, I don't know! smile.gif JJ (the Senior Technical Marketing Specialist at ASUS) says that we can use it to help obtain bigger overclocks. Although, it's probably for exceeding 5GHz. I don't know. redface.gif

I still have a lot of testing to do, so I think I'll get 4.8GHz stable with it enabled and then test it again with it disabled.
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post #2168 of 9343
I bought the P8P67 Pro to replace my P8P67 Vanilla..

Hopefully I can sell it! smile.gif
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post #2169 of 9343
Hello all,
First time poster and just want to say what a great club.
Had my P8Z68-V Pro for a week now and have been reading heaps about overclocking. Up to pg85 on this thread so far.
Just wondering why when I set Memory Freq to 1600Mhz and boot to windows my cpu sits at 3800Mhz. It doesn't down clock when idle. Is this normal?
Sorry for being such a noob.

Waiting for a Hyper 212 Plus before I attempt any real OC.
Edited by stone2 - 7/20/11 at 8:47pm
Unhealthy Passion
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CPUMotherboardGraphicsRAM
2600K 4.5 24/7 Asus P8Z68-V Pro Gigabyte R9 290X OC Windforce KINGSTON HYPER X FURY 16GB DDR3- 1866MHz 
Hard DriveOptical DriveCoolingOS
1 x Samsung 850 Evo 250GB SSD + 6 Spinners Samsung DVDWBD SH-B123A Prolimatech Super Mega CPU Cooler Windows 7 Ultimate 64 
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3 X Asus PA248Q + 1 X Dell 1707FP Corsair RGB K70 Corsair TX750W Coolermaster HAF X 
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Unhealthy Passion
(15 items)
 
  
CPUMotherboardGraphicsRAM
2600K 4.5 24/7 Asus P8Z68-V Pro Gigabyte R9 290X OC Windforce KINGSTON HYPER X FURY 16GB DDR3- 1866MHz 
Hard DriveOptical DriveCoolingOS
1 x Samsung 850 Evo 250GB SSD + 6 Spinners Samsung DVDWBD SH-B123A Prolimatech Super Mega CPU Cooler Windows 7 Ultimate 64 
MonitorKeyboardPowerCase
3 X Asus PA248Q + 1 X Dell 1707FP Corsair RGB K70 Corsair TX750W Coolermaster HAF X 
MouseMouse PadAudio
Logitech MX518 SteelSeries QcK Auzentech X-Fi Forte 7.1 
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post #2170 of 9343
Thread Starter 
Quote:
Originally Posted by stone2;14289394 
Hello all,
First time poster and just want to say what a great club.
Had my P8Z68-V Pro for a week now and have been reading heaps about overclocking. Up to pg85 on this thread so far.
Just wondering why when I set Memory Freq to 1600Mhz and boot to windows my cpu sits at 3800Mhz. It doesn't down clock when idle. Is this normal?
Sorry for being such a noob.

Waiting for a Hyper 212 Plus before I attempt any real OC.

Welcome to OCN (Overclock.net lol post-flame-small.gif)

Aaaaaanyways... Could you go HERE and fill your system spec with as much info as possible (take a peek at my system spec)

What changes did you make in the bios apart from changing the RAM? Intel speedstep and C1E allow the CPU to downclock when you not utilising it, make sure both are enabled, it should be under cpu configuration.

Hope that helps thumb.gif
it looks alive
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Sandy Transformed
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CPUMotherboardGraphicsRAM
i5 2500K [5ghz 1.44v 24/7] Asus Maximus IV Extreme SLI GTX 460 @ 920/1840/4100 [1.11v] 4GB Dominator GT @ 2133mhz CL8 [1.65v] 
Hard DriveHard DriveCoolingOS
Intel X25-M G2 80GB 3x Samsung F3 500GB RAID 0 EK Supreme HF Full Copper Windows 7 Ultimate 64bit 
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LG42SL9500 42" 1080p [Surround Soon] XFX XXX Edition 650w Xigmatec Elysium JVC HA-RX700 [foam mod] 
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it looks alive
(17 items)
 
Sandy Transformed
(69 photos)
 
CPUMotherboardGraphicsRAM
i5 2500K [5ghz 1.44v 24/7] Asus Maximus IV Extreme SLI GTX 460 @ 920/1840/4100 [1.11v] 4GB Dominator GT @ 2133mhz CL8 [1.65v] 
Hard DriveHard DriveCoolingOS
Intel X25-M G2 80GB 3x Samsung F3 500GB RAID 0 EK Supreme HF Full Copper Windows 7 Ultimate 64bit 
MonitorPowerCaseAudio
LG42SL9500 42" 1080p [Surround Soon] XFX XXX Edition 650w Xigmatec Elysium JVC HA-RX700 [foam mod] 
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