Max vcore 24/7 E8400/8500 45nm Wolfdale on Air?

[CERO]

According to Intel specs: http://processorfinder.intel.com/det...px?sSpec=SLAPL

the VID range for these cpu is up to 1.3625, where as the 65nm, got a VID range up to 1.50, and for the rule of a tumb, up to 1.50v is safe for 65nm, 24/7 with proper cooling, but how about 45nm?, does this mean for 45nm chips @ 1.3625v is like 1.50v for 65nm? So what is basicly the max vcore for these chips 24/7( Air), or it is to early to say lol and we need to wait untill some1 reports their cpu is dead.

[Bail_w]

prob 1.55-1.6v is the max you should go for either 45nm or 65nm on air or water cooling.

[rge]

Intel spec sheet for E8000 series - page 17
ftp://download.intel.com/design/proc...s/31873201.pdf

Table 3 lists Vcore max E8000 series at 1.45v.

They state operating above 1.45v can cause the device to "either not function, or its reliability will be severely degraded."

They state operating above functional limit ?VID max but at or below 1.45v the "device may be functional, but with its lifetime degraded".


Compare that to Intel spec for E6000 series - page 20
ftp://download.intel.com/design/proc...s/31327807.pdf

Vcore max is 1.55V, and they give same warnings, that above 1.55V can kill the chip, 1.55V and less to functional limit ?VID max can degrade the chip.

Basically looks like 1.45 Vcore on E8000 series is equivalent degradation wise to 1.55 Vcore on E6000 series. Personally for 24/7 I will try to stay at or below 1.4 on E8000, like 1.5 was max for me 24/7 on E6850.

[CERO]

Great find, think thats sounds reasonable, 1.40vcore for 24/7 use.

[magnifico]

well

[Pandamonia]

i have been running my E6600 since the day it released at 1.55v - i havent seen any degredation as of yet.

[eaa315]

i have been running my E6600 since the day it released at 1.55v - i havent seen any degredation as of yet.

+1

[kiwi]

There is no one value. I'd say keep it ~20C lower than throttling temp. Who keeps these chips for more than 1-2 years anyway?

[Noob-ftw]

i have been running my E6600 since the day it released at 1.55v - i havent seen any degredation as of yet.

It's also 65nm, whereas the E8x00 series are 45nm; this means that they can't take as much voltage. I wouldn't put anymore than 1.45V on any 45nm chip, no matter what kind of cooling you use. (Unless your benching).

[CERO]

There is no one value. I'd say keep it ~20C lower than throttling temp. Who keeps these chips for more than 1-2 years anyway?

Well My concern is more voltage then temps.

[Pandamonia]

Well My concern is more voltage then temps.

at £136 per chip who cares.

i used to run high volts on my FX60 at 650£ each!

you can afford to blow a few of these up

[JZL]

at £136 per chip who cares.

i used to run high volts on my FX60 at 650£ each!

you can afford to blow a few of these up

ROFL!!

I set 1.49 in BIOS but see 1.34 in CPU-Z. In this thread I see vcores such as 1.4-1.55 but dunno "which" vcore you all mean. I'm running my e8400 on an aBit IP35 Pro with watercooling, getting 4.16 GHz with 55° load temps.

[mrcape]

VDROOP enabled? If so, disable it and check again.

[JZL]

I've not seen vdroop with this board-- is it one of these by another name?

Limit CPUID MaxVal
CIE Function Auto
Execute Disable Bit
EIST Function

[[XC] gomeler]

at £136 per chip who cares.

i used to run high volts on my FX60 at 650£ each!

you can afford to blow a few of these up

F'ing agreed. Crying about losing an E8400 is sad, either run it at 1.4v and be happy with 4GHz or blast the hell out of it and realize your chip will be dead in a short period of time. People fail to realize these chips are 45nm and 65nm volts are not safe or even required.

[JZL]

Oh I think a voltmod is need to remove vdroop (which is the gap between vcore in bios and vcore in windows per CPU-Z or Everest?) with this motherboard.

I disabled CIE and EIST and got significantly farther into an OCCT run before it failed again at 4212-- but it did fail.

Edit: I read up more on vdroop; had that part wrong. There IS a voltmod for this board, tho.

[dr.noob]

24/7 1.40v or 1.45v?

temperature max 71ºC?

[Rickster_64]

My E8400 primes all night with 1.26V after droop with a 1.31v set in the bios. Temps climb to 63C with my somewhat small heatpipe air cooler, but I'm calling it good, haha. I benched sandra with it at 4200 but the 468fsb was too much for my $25.00 OCZ ram (after rebate) from newegg. It runs hellish 4, 4,4, 12 though all the way!!! Its even 5, 5, 5 15 spec'd! I would probably keep them at or under 1.4 Vcore IF you plan on keeping it a long time, but it will not degrtade fast enough with higher voltage unless you are a person who runs insane volts then lets their machine do folding@home 24/7. I prefer the savings in my electric bill ;-).

[updawg]

are the thermal specs the same between the e6 serries and the e8 series?