2500k manual oc issue

paradisiac · 2 Jul 2011 at 14:53

ok, so i had it running fine with ASRocks auto oc tool in the bios at 4.4GHz, but the vcore was 1.3-1.35v which was bumping up my temps. so i went into bios, turned off the auto oc and upped the multi to 44. great, vcore dropped to 1.2-1.27v under load and temps are about 3-5c lower, great........or so you would think. when running OCCT or prime, the multi when under load ranges from 38-44 it doesnt go to 44 and stop, it fluctuates.
if however i run windows scoring it runs at 4.4GHz all through the cpu/gfx/ram tests.
what am i doing wrong?

Jordan97 · 2 Jul 2011 at 14:58

It is probably the power saving utilities.

The CPU will automatically drop the multiplier to save power when it does not need it.

There should be an option in the BIOS to disable it if it is annoying you that much.

paradisiac · 2 Jul 2011 at 14:59

Jordan97 said:
It is probably the power saving utilities.

The CPU will automatically drop the multiplier to save power when it does not need it.

There should be an option in the BIOS to disable it if it is annoying you that much.

not annoying me, just how can i stress test it if it wont run at full speed?

Jordan97 · 2 Jul 2011 at 15:01

Oh right sorry, did not read the original post properly.

If this is doing it during a stress test, it might be a sign of instability. Up the Vcore a notch and see if it solves the problem.

paradisiac · 2 Jul 2011 at 15:04

Jordan97 said:
Oh right sorry, did not read the original post properly.

If this is doing it during a stress test, it might be a sign of instability. Up the Vcore a notch and see if it solves the problem.

is there any way to change the vcore, but still allowing it to drop to 0.9 when the multi goes to 16 with speedstep?

Jordan97 · 2 Jul 2011 at 15:06

It should not matter what it is. Speedstep will change it to what it needs for the current speed.

paradisiac · 2 Jul 2011 at 15:08

so i can set it to fixed and it should still drop (i have auto/fixed/offset)?

Orcvader · 2 Jul 2011 at 15:11

Make sure Turbo is off. You can leave Speedstep on as that's fine. 38 would lead me to believe it could be Turbo causing it.

As for raising the voltage, don't worry as the voltages will still drop as Speedstep will drop both speeds and voltages when idle to help save power.

Jordan97 · 2 Jul 2011 at 15:12

Too late..

paradisiac · 2 Jul 2011 at 15:13

Orcvader said:
Make sure Turbo is off. You can leave Speedstep on as that's fine. 38 would lead me to believe it could be Turbo causing it.

As for raising the voltage, don't worry as the voltages will still drop as Speedstep will drop both speeds and voltages when idle to help save power.

ok thanks. i cant see anything in the bios for turbo being on

if i use the auto oc then it stays at 4.4GHz all the time in prime and is 16-19 when idle.

Jordan97 · 2 Jul 2011 at 15:15

paradisiac said:
ok thanks. i cant see anything in the bios for turbo being on if i use the auto oc then it stays at 4.4GHz all the time in prime and is 16-19 when idle.

This is probablly because the auto OC, will adjust the Vcore to handle with the new speeds.

Like I said earlier, it is probably a stability issue that is causing your speeds to jump around.

paradisiac · 2 Jul 2011 at 15:18

ok found the turbo option, turned it off

will test again. 4.4GHz (with auto) is about my limit due to temps, 4.6GHz took me over 80c which i wasnt happy with. so will try a manual 4.5GHz until i get my new cooler.
just so i get this right, if i set vcore to 1.35v that will be the MAX it will go to, so if it only needs 1.32v then thats all it will take?

Jordan97 · 2 Jul 2011 at 15:21

paradisiac said:
ok found the turbo option, turned it off will test again. 4.4GHz (with auto) is about my limit due to temps, 4.6GHz took me over 80c which i wasnt happy with. so will try a manual 4.5GHz until i get my new cooler.

Yeah 80c is a little too much

What cooler are you using if you don't mind me asking?

paradisiac · 2 Jul 2011 at 15:24

using the freezer 7 rev 2. once my 2nd pc sells will be getting the silver arrow everyone rates

paradisiac said:
just so i get this right, if i set vcore to 1.35v that will be the MAX it will go to, so if it only needs 1.32v then thats all it will take?

is this right?

Jordan97 · 2 Jul 2011 at 15:29

No sure I understand that.

Are you saying that if you set the Vcore to 1.35, but it only needs 1.32, the other 0.03 will not be used? If this is what you are saying, then that is incorrect. The CPU will take in the entire 1.35v and will most probably fry the chip. This is why when you play with the voltages it is always important to change it by only ONE notch at a time.

If I remember correctly (please feel free to correct me anyone) but I think that even 1.32v is abnormally high for a Sandybridge chip.

paradisiac · 2 Jul 2011 at 15:31

Jordan97 said:
No sure I understand that.

Are you saying that if you set the Vcore to 1.35, but it only needs 1.32, the other 0.03 will not be used? If this is what you are saying, then that is incorrect. The CPU will take in the entire 1.35v and will most probably fry the chip. This is why when you play with the voltages it is always important to change it by only ONE notch at a time.

If I remember correctly (please feel free to correct me anyone) but I think that even 1.32v is abnormally high for a Sandybridge chip.

i thought people were using 1.36-1.4v to get 4.6GHz+?

so if i set it, and it will use all of it, then you are saying it wont drop to 0.9v when speedstep kicks in :confused:

but you said before it would

Jordan97 · 2 Jul 2011 at 15:36

I didn't say it wouldn't drop. What I am saying is that the CPU will use the entire 1.35v when SpeedStep is not active. It does not matter what the voltage is set to in the BIOS. You can completely forget Speedstep. It is irrelevent.

If you do not need the the extra 0.03v, then do not put it that high. You are creating unnecessary heat and in turn, shortening the lifespan of the chip.

Orcvader · 2 Jul 2011 at 15:37

1.38v is the absolute max voltage for SB for 24/7 use. 1.35v is considered the safest max. Just leave the voltage as it is and make sure you have LLC enabled. Seeing as you have a Z68 board, you have 10 levels of LLC to choose from. I would try from LLC level 5 to 6.

paradisiac · 2 Jul 2011 at 15:38

Jordan97 said:
I didn't say it wouldn't drop. What I am saying is that the CPU will use the entire 1.35v when SpeedStep is not active. It does not matter what the voltage is set to in the BIOS. You can completely forget Speedstep. It is irrelevent.

If you do not need the the extra 0.03v, then do not put it that high. You are creating unnecessary heat and in turn, shortening the lifespan of the chip.

ok, so i set it to 1.32v will drop back from here until i bsod. but when stressing it, the voltage fluctuates from 1.26-1.30, so does this mean this is the range is should be working in, as it doesnt seem to go up to 1.32v ever, even though thats what its set to :confused:

paradisiac · 2 Jul 2011 at 15:39

Orcvader said:
1.38v is the absolute max voltage for SB for 24/7 use. 1.35v is considered the safest max. Just leave the voltage as it is and make sure you have LLC enabled. Seeing as you have a Z68 board, you have 10 levels of LLC to choose from. I would try from LLC level 5 to 6.

leave vcore on auto and go llc from 5 (pretty sure thats what its on) to 6?
is this good up to 4.5GHz or maybe higher?