C1E question

[munisgtm]

I have this rig

e4300 @ 2.8 (stock HSF)
P6N-sli platinum
Corsair 2x1GB DDR2-667 Value RAM
8800GTS320mb
Cooler master 600W power supply

at 2.8 Ghz i have turned on the C1E option which switches the the mulitplier to 6x (hence 1.8Ghz) when computer is idle or at a low load , So do this option helps CPU elongate its life ? Also i wanted to know about this throttling thing never done it but i have heard it does something similar to C1E , do you guys would recommend me to keep this option turned on ?

Thanks in advance

 

[Rubycon]

It's for power saving. Turn it OFF if it causes instability. It can also skew benchmark results so if you're comparing things best leave it off. It also does nothing if your CPU is 100% load - i.e. folding or searching for ET, etc.

 

[Idontcare]

For Intel systems:

C1E - reduces your power bills. Reduces clockspeed when by reducing CPU multiplier when CPU is idle.

EIST - reduces Vcore when system is idle. Some mobo's disable this as soon as the user manually sets the core voltage. (all of mine do)

TM2 - thermal throttling routine, intended to improve upon TM1. See more here: http://www.digit-life.com/arti...al-features-core2.html

 

[munisgtm]

Thanks ! Now i know

 

[VirtualLarry]

Originally posted by: Idontcare
For Intel systems:

C1E - reduces your power bills. Reduces clockspeed when by reducing CPU multiplier when CPU is idle.

EIST - reduces Vcore when system is idle. Some mobo's disable this as soon as the user manually sets the core voltage. (all of mine do)

TM2 - thermal throttling routine, intended to improve upon TM1. See more here: http://www.digit-life.com/arti...al-features-core2.html

You have C1E and EIST backwards, I think.

 

[Idontcare]

Originally posted by: VirtualLarry

Originally posted by: Idontcare
For Intel systems:

C1E - reduces your power bills. Reduces clockspeed when by reducing CPU multiplier when CPU is idle.

EIST - reduces Vcore when system is idle. Some mobo's disable this as soon as the user manually sets the core voltage. (all of mine do)

TM2 - thermal throttling routine, intended to improve upon TM1. See more here: http://www.digit-life.com/arti...al-features-core2.html

You have C1E and EIST backwards, I think.

http://www.anandtech.com/cpuch...ts/showdoc.aspx?i=2725

 

[downhiller80]

FWIW I'm currently running a 2.66GHz E6750 at 3.8GHz with C1E (SpeedStep) on with no problems.

Amusingly it still runs at 2.85GHz when "slowed down" :-D

 

[Idontcare]

The one that supposedly gets all "wacky" when overclocking is the TM2. It requires certain FSB and clock multiplier combinations or else it manually over-rides your settings and limits your maximum speed at any temperature.

 

[LeadMagnet]

yup

 

[VirtualLarry]

Originally posted by: Idontcare
The one that supposedly gets all "wacky" when overclocking is the TM2. It requires certain FSB and clock multiplier combinations or else it manually over-rides your settings and limits your maximum speed at any temperature.

It only enables once thermal throttling hits, then it decreases your voltage and multi to save the chip. If you've overclocked enough to hit that barrier, then you've gone too far anyhow. No ones legitimate overclock should be hindered by TM2 being enabled.

 

[VirtualLarry]

Originally posted by: Idontcare

Originally posted by: VirtualLarry

Originally posted by: Idontcare
For Intel systems:

C1E - reduces your power bills. Reduces clockspeed when by reducing CPU multiplier when CPU is idle.

EIST - reduces Vcore when system is idle. Some mobo's disable this as soon as the user manually sets the core voltage. (all of mine do)

TM2 - thermal throttling routine, intended to improve upon TM1. See more here: http://www.digit-life.com/arti...al-features-core2.html

You have C1E and EIST backwards, I think.

http://www.anandtech.com/cpuch...ts/showdoc.aspx?i=2725

According to that article, both of them affect both voltage and multiplier. It's been my experience with mobo implementations that C1E affects the voltage, and SpeedStep affects the multiplier.

 

[Quiksilver]

I do believe larry is right, cause whenever someone would come on here and say "X" program is only showing a 6x multiplier while "Z" program shows it higher. Someone would tell them to go into their BIOS and turn off EIST, and magically both programs would see the higher multiplier.

 

[Amaroque]

I don't use C1E, or EIST.

 

[Sylvanas]

Originally posted by: Amaroque
I don't use C1E, or EIST.

Yeah, turning them off is the first thing I do- they just get annoying when benching/ testing OC.

 

[Idontcare]

Originally posted by: VirtualLarry

Originally posted by: Idontcare

Originally posted by: VirtualLarry

Originally posted by: Idontcare
For Intel systems:

C1E - reduces your power bills. Reduces clockspeed when by reducing CPU multiplier when CPU is idle.

EIST - reduces Vcore when system is idle. Some mobo's disable this as soon as the user manually sets the core voltage. (all of mine do)

TM2 - thermal throttling routine, intended to improve upon TM1. See more here: http://www.digit-life.com/arti...al-features-core2.html

You have C1E and EIST backwards, I think.

http://www.anandtech.com/cpuch...ts/showdoc.aspx?i=2725

According to that article, both of them affect both voltage and multiplier. It's been my experience with mobo implementations that C1E affects the voltage, and SpeedStep affects the multiplier.

From personal experience:

For i680 (Striker Extreme), P35 (DS3L), and X38 (P5E WS Pro) chipsets the C1E determines whether the CPU's idle clock multiplier is reduced or not.

EIST determines whether Vcore is reduced on these boards. Changing Vcore in the BIOS to anything but "Auto" causes EIST to stop functioning, on these boards and these chipsets.

 

[BonzaiDuck]

Sorry, Idontcare, but my experience has been different.

I'd leave C1E "disabled," and EIST "enabled" after disabling both to stress-test an OC setting with the 680i (you know . . . . the Stri-kerrr).

In Everest, you could watch the multiplier go from 9 to 6 and back again, as one started programs. The CPU speed would rise and fall accordingly. Never saw the monitored voltage in Everest change, though, with EIST enabled.

 

[BonzaiDuck]

. . . but wait a minute, as the light glimmers slowly through my Oldheimer's-ridden brain -- I ALWAYS had the VCORE at a FIXED setting . . . . . um . . . . HMMMM!!

 

[exar333]

Originally posted by: munisgtm
Thanks ! Now i know

"And knowing is half the battle!"

 

[VirtualLarry]

Originally posted by: Idontcare
From personal experience:

For i680 (Striker Extreme), P35 (DS3L), and X38 (P5E WS Pro) chipsets the C1E determines whether the CPU's idle clock multiplier is reduced or not.

EIST determines whether Vcore is reduced on these boards. Changing Vcore in the BIOS to anything but "Auto" causes EIST to stop functioning, on these boards and these chipsets.

Do you really mean that EIST is completely disabled (doesn't drop the multi either), or do you mean to say that EIST no longer drops the voltage?

 

[munisgtm]

All this is quite confusing!

 

[Riverhound777]

I have C1E turned on with my DS3L and E8400 (at 4050Mhz) but I'm not sure whether it is really going to help. Sure my Multi drops to 6, but my voltage and temperatures stay the same, so what is the benefit?

 

[defiantsf]

Power = I * V (Current Draw * Voltage)

By reducing the multiplier/clockspeed, the CPU draws less current when idling. Even WITHOUT reducing the voltage, overall power consumption is reduced, yielding less heat and saving you $$$ in electricity.

 

[UTFan81]

Originally posted by: Rubycon
It's for power saving. Turn it OFF if it causes instability. It can also skew benchmark results so if you're comparing things best leave it off. It also does nothing if your CPU is 100% load - i.e. folding or searching for ET, etc.

that's a load of bs. it works fine for 99% of people.

 

[Rubycon]

Originally posted by: UTFan81

Originally posted by: Rubycon
It's for power saving. Turn it OFF if it causes instability. It can also skew benchmark results so if you're comparing things best leave it off. It also does nothing if your CPU is 100% load - i.e. folding or searching for ET, etc.

that's a load of bs. it works fine for 99% of people.

Every 975 system I've had made it unstable at high FSB. There's no need to run it ESPECIALLY if you load your CPU all the time. Where it saves money is in business use where the cpu is idle most of the time. Even a few tens of watts times 100's of pc's start to add up.

To the enthusiast there is no advantage to having it on. None. And if it makes YOUR systems unstable, the solution is obvious.

 

[UTFan81]

Originally posted by: Rubycon

Originally posted by: UTFan81

Originally posted by: Rubycon
It's for power saving. Turn it OFF if it causes instability. It can also skew benchmark results so if you're comparing things best leave it off. It also does nothing if your CPU is 100% load - i.e. folding or searching for ET, etc.

that's a load of bs. it works fine for 99% of people.

Every 975 system I've had made it unstable at high FSB. There's no need to run it ESPECIALLY if you load your CPU all the time. Where it saves money is in business use where the cpu is idle most of the time. Even a few tens of watts times 100's of pc's start to add up.

To the enthusiast there is no advantage to having it on. None. And if it makes YOUR systems unstable, the solution is obvious.

well in that cause yeah it makes more sense but most people don't run their cpu at load all the time. probably not even 1/4 of the time. as for it being unstable at a high fsb how high? I've done stress testing on my overclocked e6750 system with it enabled and haven't had any issues so far.