• Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
    Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.

How to configure 2500k to decrease voltage when not needed?

L

leeleatherwood

[H]ard|Gawd
Joined
Sep 6, 2011
Messages
1,582
Ive got this 2500k at 5.0ghz stable, 1.5 volts, watercooled. Motherboard is Asus Maximus Gene-V

I have enabled speedstep in the motherboard and it does indeed decrease the cpu speed when idle to 1600mhz but the voltage does not decrease with it. I have also enabled the EPU power saving thing in the bios but that doesn't change the CPU speed either.

I am new to Intel systems, specifically the Core-i series, so I need some advice.
 
The two settings you need to enable are C1E and EIST - and Auto in the BIOS may be the same as disabled when overclocking, so you'll need to manually set them to enable.

However, if you are using a fixed manual voltage for your overclock, then it won't downvolt no matter what you have set. You need to use either Auto for the voltage, or set up offset voltage (which adds a set amount to the default voltage at a given speed - so if the default is 1.3 and you want 1.5 you'd set a +0.2 offset). You need to do some trial and error to get the offset dialed in initially though, since there is no way to find out the CPU's default voltage for a given speed (it changes at different speeds).
 
Forceman said:
The two settings you need to enable are C1E and EIST - and Auto in the BIOS may be the same as disabled when overclocking, so you'll need to manually set them to enable.

However, if you are using a fixed manual voltage for your overclock, then it won't downvolt no matter what you have set. You need to use either Auto for the voltage, or set up offset voltage (which adds a set amount to the default voltage at a given speed - so if the default is 1.3 and you want 1.5 you'd set a +0.2 offset). You need to do some trial and error to get the offset dialed in initially though, since there is no way to find out the CPU's default voltage for a given speed (it changes at different speeds).
Click to expand...

Nice. I will check this out.

The voltage offset sounds like it will do the trick, as I manually set the voltage instead of used the offset.
 
Okay, that did work, BUT there is one quirk.

It will stay at 1600mhz unless I open the Asus TurboV software and set the multiplier to 50 (even though its already at 50, I still have to do it) and then the CPU will ramp up to 5ghz under load and everything works fine like it supposed to.

I dont want to have to go in there and do that everytime I start the computer. Its probably a setting I have wrong in the BIOS since I was messing with so many things. I will probably reset CMOS and start fresh.

EDIT: Nevermind, Figured it out. Its the Asus Ai Suite software. Uninstalling it now, I dont need anything it offers except monitoring. Is there a good lightweight monitoring software I can use that shows temps and voltages?
 
Last edited:
CoreTemp or RealTemp work well. HWInfo also reads the temp sensor on-die, I believe.
 
The 1600MHz is for the Intel® Speedstep. This is a step to save power when the processor isn't doing anything. If you have something running in the background it should be up to the normal speed.
 
leeleatherwood said:
Okay, that did work, BUT there is one quirk.

It will stay at 1600mhz unless I open the Asus TurboV software and set the multiplier to 50 (even though its already at 50, I still have to do it) and then the CPU will ramp up to 5ghz under load and everything works fine like it supposed to.

I dont want to have to go in there and do that everytime I start the computer. Its probably a setting I have wrong in the BIOS since I was messing with so many things. I will probably reset CMOS and start fresh.

EDIT: Nevermind, Figured it out. Its the Asus Ai Suite software. Uninstalling it now, I dont need anything it offers except monitoring. Is there a good lightweight monitoring software I can use that shows temps and voltages?
Click to expand...

I second HWiNFO64. I like it because it monitors everything in one panel: CPU readings (temp/voltages/speed), motherboard (temps, voltage, fan speed), GPU (speed, temps, fan), hard drives (temps) and also has in depth diagnostics (SMART for HDD).

I only use Ai Suite for fan control personally.
 
IntelEnthusiast said:
The 1600MHz is for the Intel® Speedstep. This is a step to save power when the processor isn't doing anything. If you have something running in the background it should be up to the normal speed.
Click to expand...

Yeah. I could get the Speedstep working but the voltage wasnt dropping with the speed.

All has been resolved now, working great at 5ghz, its BLAZIN!
 
What type of watercooling are you using for the 5ghz overclock?

I can hit 5ghz 1.5v. I just worry about proc lol. My TRUE120 can only handle so much
 
Grats on 5 ghz but it is NOT Needed in any realistic scenario. Lock that chip in around 4.5-4.7 and you are already on jet fuel.
 
DASHlT said:
What type of watercooling are you using for the 5ghz overclock?

I can hit 5ghz 1.5v. I just worry about proc lol. My TRUE120 can only handle so much
Click to expand...

H60 with dual fans. Radiator gets heat soaked after a while but still manages to keep the temps below 80 with Prime 95 running (In-place large FTF's, maximum heat)

Temps stay at or below 80, still stable. I dont like running 1.5v either but I read Intel says 1.52v is fine for 24/7 use. Still with the Speedstep enabled the vCore rarely goes above 1.4v during normal use, infact most of the time its at 1v when at 1600mhz.

I am going to try sourcing another Radiator for this H60 on ebay from a unit with a broken pump or something, then I will have 2 H60 radiators.
 
leeleatherwood said:
H60 with dual fans. Radiator gets heat soaked after a while but still manages to keep the temps below 80 with Prime 95 running (In-place large FTF's, maximum heat)

Temps stay at or below 80, still stable. I dont like running 1.5v either but I read Intel says 1.52v is fine for 24/7 use. Still with the Speedstep enabled the vCore rarely goes above 1.4v during normal use, infact most of the time its at 1v when at 1600mhz.

I am going to try sourcing another Radiator for this H60 on ebay from a unit with a broken pump or something, then I will have 2 H60 radiators.
Click to expand...

I dunno how you can keep it that cool. I couldnt even keep it cool with an Antec 920 with 2 fans overnight on prime95 @ 4.8ghz. It was hitting 85c Overnight.

My TRUE120 keeps is down around 82c overnight at the same settings.....Are you sure you got all the windows updates installed?

Not that I dont believe ya....but an H60 on those temps.....must be 1 badass H60 then.
 
DASHlT said:
I dunno how you can keep it that cool. I couldnt even keep it cool with an Antec 920 with 2 fans overnight on prime95 @ 4.8ghz. It was hitting 85c Overnight.

My TRUE120 keeps is down around 82c overnight at the same settings.....Are you sure you got all the windows updates installed?

Not that I dont believe ya....but an H60 on those temps.....must be 1 badass H60 then.
Click to expand...

It depends on ambient temperature and how long you run it. If I run my PC for let's say 6 hours of prime I bet the temps would start going into the 80's as well because it heats up my room so much.(Max I ever saw so far was 73C if even, might have been 71C or so).

Also, 85C isn't bad for hours and it's not going to hit those temperatures during gaming. Stress tests are just the worst case scenario :p
 
xIronCrossx said:
It depends on ambient temperature and how long you run it. If I run my PC for let's say 6 hours of prime I bet the temps would start going into the 80's as well because it heats up my room so much.(Max I ever saw so far was 73C if even, might have been 71C or so).

Also, 85C isn't bad for hours and it's not going to hit those temperatures during gaming. Stress tests are just the worst case scenario :p
Click to expand...

My personal preference is to stay below 85c. Thats just me.

I could give 5ghz a try again at 1.5v. But I dont think 200mhz is going to make a huge difference in performance (well other then the epeen of 5ghz!!!)

Been debating to get the new Thermaltake All in 1 water cooling. It's accually thicker then the H100.....
 
DASHlT said:
I dunno how you can keep it that cool. I couldnt even keep it cool with an Antec 920 with 2 fans overnight on prime95 @ 4.8ghz. It was hitting 85c Overnight.

My TRUE120 keeps is down around 82c overnight at the same settings.....Are you sure you got all the windows updates installed?

Not that I dont believe ya....but an H60 on those temps.....must be 1 badass H60 then.
Click to expand...

Well I am not using the stock fans on the H60, I have some nice Silverstone fans that push more air, still they are not loud though. There was some research done and a chart posted somewhere that showed the huge difference fans can make on watercooling radiators. Also I am using Arctic Silver 5.

Anyways, Ive never let it run all night, I don't see the point. Its been ran for 4-5 hours on multiple occasions and temps don't go above 80c. I also use the "In Place Large TFT's, Maximum Heat" mode. During gaming or benchmarking my temps never even go above 75c.

Also, Im going to try to find another H60 Radiator (or even H80) from a broken unit or something on ebay and have 2 Radiators in the loop.
 
You must log in or register to reply here.
Back
Top