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2500K - Stuck at 4.6 -Help me Soar

post #1 of 24
Thread Starter 
Hey Everyone:

I have 2500k processor on a p8p67 pro cooled with a Thermalright silver arrow. I bought the processor about 5 weeks ago and overclocked it from the start and now as I am more familiar with all my new equipment I am ready to take the OC to the next level. Currently I am sitting at 4.6 @ 1.385v and prime stable 24 hours. I'd love 5Ghz 24/7 and would like some advice on what I can try to get there.

My current bios settings are:

BCLK: 100
Turbo: 46
PLL: enabled
Mem: 1600 (timings 8-8-8-24)
LLC: Ultra
VRM: 350
Phase: Extreme
CPU: 110%
Vcore: 1.385
DRAM: 1.65
Other Volts: AUTO
Spread Spec: AUTO

Can't remember my CIE, etc settings on the CPU config screen as I am not currently at my PC.

Based on these settings above is there any chance I can push my CPU multi higher at a "reasonable" voltage for 24/7 on air? If so what are your recommendations for getting there.

Thanks in advance
post #2 of 24
Now up your vcore. When I hit 5ghz, my v core was around 1.50. Up it to 1.40 and if it works, up the multiplier. Its a big trial and error type thing. Once you get it working where u like it. Run Prime 95 1 hr blend and make sure its stable.
post #3 of 24
Isn't 1.65v on the RAM too much? I read somewhere that Intel recommends 1.6v or below for 24/7 use to prevent damage to the memory controller ..

I'm using the same settings as you by the way (except CPU: 100%). Multiplier at 48 gives me 4.8 GHz using 1.41v.
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Ares v2.0
(8 items)
 
Chaos v2.2
(12 items)
 
Eos v2.0
(8 items)
 
CPUGraphicsRAMHard Drive
Intel Core i7 6700HQ 2.60GHz NVIDIA GTX 960M 16GB DDR4 2133MHz Western Digital 1TB 
OSMonitorKeyboardCase
Windows 10 x64 15.6" FHD IPS matte-black display Built-in backlit ASUS Republic of Gamers 
CPUMotherboardRAMHard Drive
Core i3-3240 ASRock B75 Pro3-M Kingston DDR3 16GB 1333MHz 1.5v 4x WD Red NASware 3TB 
Hard DriveHard DriveCoolingOS
4x Samsung F4 2TB HD204UI WD Caviar Blue 500GB Arctic Freezer 13 Ubuntu 14.04 LTS x64 
PowerCaseOtherOther
Corsair CX430 v2 X-Case RM424 - 24 bay mini-SAS LSI SAS-9207-4i4e 6Gbps PCI-E 3.0 HBA Chenbro CK22804 28 port SAS Expander 
CPUGraphicsRAMHard Drive
Intel Core i3 6100U 2.3 GHz Intel HD Graphics 520 8 GB Kingston DDR3 1600 MHz Crucial MX200 250GB M2.SSD 
Hard DriveOSMonitorKeyboard
Kingston SSDNow V300 120GB SSD Windows 10 Pro x64 13.3" Full HD IPS 1920 x 1080 Backlit 
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post #4 of 24
some ram is rated to run at 1.65, mine is rated for 1.50. Ram is ok. U just need to up your vcore
post #5 of 24
Depending on the processor itself you might not even make it to 5Ghz, but you definitly need 1.5vcore since you already use or need 1.385 for 4.6Ghz. You can go up to 1.52 vcore max for reasonable safety.
Also put your LLC to ultra high (if it has the option my p8p67 evo has it) and cpu to just 100%. I also wouldn't put phase on extreme if i where you.
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Darkforce
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post #6 of 24
If your target CPU clock is 5ghz, make sure your ram voltage stays on 1.5v max.
post #7 of 24
To get 5GHz this is what you do:

BCLK: 100
Turbo: 50
PLL: enabled
Mem: 1600 (timings 8-8-8-24)
LLC: Ultra
VRM: AUTO
Phase: Extreme
CPU: 130%
Vcore: SOMEWHERE BETWEEN 1.42-1.46 judging by your 4.6 @ 1.385v (your going to have to test)
DRAM: 1.65
Other Volts: AUTO
Spread Spec: AUTO

Be patient, take your time testing and find the lowest stable volts. Finally when doing initial tests don't run Prime for 6 hours or something, just an hour or 2 is fine for initial testing, then if this proves to be stable and you've taken the volts as low as they can go stably THEN run prime for 6 hours or 24 hours how ever long you want for final stability tests

Edit: Messed up the Vcore sorry lol, its 1am here
Edited by hirolla888 - 5/17/11 at 8:03am
post #8 of 24
Quote:
Originally Posted by _s3v3n_ View Post
If your target CPU clock is 5ghz, make sure your ram voltage stays on 1.5v max.
But make sure your ram is rated for 1.5v. If your ram is rated for 1.65v, dont put it at 1.5
post #9 of 24
Quote:
Originally Posted by CtrlAltElite View Post
some ram is rated to run at 1.65, mine is rated for 1.50. Ram is ok. U just need to up your vcore
Sandy Bridge doesn't (or at least didn't before) like the difference between VDIMM and VCCIO being greater than 0.5v. By default, VCCIO is 1.05v, so using 1.65v VDIMM is a 0.6v difference, which was thought to have caused IMC degredation.

I don't know if this is still the case, though. I know most people suggest trying to down VDIMM to 1.55v or raise VCCIO accordingly.
post #10 of 24
Thread Starter 
Quote:
Originally Posted by hirolla888 View Post
To get 5GHz this is what you do:

BCLK: 100
Turbo: 50
PLL: enabled
Mem: 1600 (timings 8-8-8-24)
LLC: Ultra
VRM: AUTO
Phase: Extreme
CPU: 130%
Vcore: SOMEWHERE BETWEEN 1.42-1.46 judging by your 4.6 @ 1.385v (your going to have to test)
DRAM: 1.65
Other Volts: AUTO
Spread Spec: AUTO

Be patient, take your time testing and find the lowest stable volts. Finally when doing initial tests don't run Prime for 6 hours or something, just an hour or 2 is fine for initial testing, then if this proves to be stable and you've taken the volts as low as they can go stably THEN run prime for 6 hours or 24 hours how ever long you want for final stability tests

Edit: Messed up the Vcore sorry lol, its 1am here
Thanks for the recommendations. One quick question what exactly does the CPU Setting of 100%, 110%, etc do? I don't really understand this setting.

Quote:
Originally Posted by Raprash View Post
Depending on the processor itself you might not even make it to 5Ghz, but you definitly need 1.5vcore since you already use or need 1.385 for 4.6Ghz. You can go up to 1.52 vcore max for reasonable safety.
Also put your LLC to ultra high (if it has the option my p8p67 evo has it) and cpu to just 100%. I also wouldn't put phase on extreme if i where you.
On my pro board I Ultra high is the second highest Vdroop control setting. The only higher is Extreme. I have mine set to Ultra High. Is it your recommendation to use the highest Extreme setting? Isn't the an issue with using this high of an LLC were that under load the voltage actually raises? I thought that I read in the past on this board that you do not want the vcore to raise above the set amount under load.

I also have Phase set to extreme already. If I remember correctly this setting changes the reading from temp to volts.

Quote:
Originally Posted by JCG View Post
Isn't 1.65v on the RAM too much? I read somewhere that Intel recommends 1.6v or below for 24/7 use to prevent damage to the memory controller ..

I'm using the same settings as you by the way (except CPU: 100%). Multiplier at 48 gives me 4.8 GHz using 1.41v.
My crucual ballistix RAM is rated at 1.65 volts. All I have done for RAM is set the speed, timings and voltage to the recommended levels. I haven't tried overclocking my memory at all since on my last build I killed 2 sticks of RAM with very very mild over-volts and tighter timings.

Should I have be touching the VCC, VCCIO and other volts to stabilize a higher overclock. I am not quite certain how these other volts can help.

Thanks again!
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