[anna99]

Originally Posted by Hipcrostino

you can reinstall the multiprocessor version once windows is installed. Saves reinstalling windows all the time. Use device manager, select the ACPI standard pc item, click reinstall driver. it comes up with a list, you choose multiprocessor and reboot windows.

i tried that already,it only gave me 2 options,stardard pc or ACPI stardard pc.i can find the requirement .dll,but u can not install it.i tried replace the hal.dll with the multiprossor dll file,window wont boot any more.

[jason4207]

Originally Posted by batboy

Let's think about this. Room temp is mid 20's. How can idle temp be at mid 20's when that's ambient temp? If people are claiming those temps, they are dishonest, or the thermisters are out of whack, or they are running high end cooling (like water). On normal air, you'll be lucky to see mid 30's idle temp. Like I said, 50C is nothing on regular air. Don't get too hung up on what others are claiming.

I think if ambient is 20-22C then it may be possible to have mid-20's idle temps on these 45nm dual-cores.

I've got an x3210 quad w/ 1.488v (actual) pumping into it. From hibernate CoreTemp is reporting near ambient temps, and once the PC warms up a bit I'm getting something like this: 33-31-28-28 idle in a ~20C room.

[flopper1]

Originally Posted by jason4207

I think if ambient is 20-22C then it may be possible to have mid-20's idle temps on these 45nm dual-cores.

Found out my issue though, 62c
concav IHS made poor contact.
plugged back my e6750 and temps down to normal.
RMA back my e8400 since I need to lap the cpu for it to fit and that seems silly for a new cpu.

My e6750 has no lapping and works flawlessly.

[Paco572]

I have the E8400, using the Coolit Freezone Elite. I'll show before and after specs.

Before:
Thermaltake Big Typhoon 120mm Silent Heatpipe Cooler
E8400 default 3ghz
CPU
idle 35C
core 1 44c
core 2 45c
didn't test under load.
---------------------------------------------------------
My previous CPU the E6850 @ 3.6ghz core v1.41 in windows

CPU
idle 35c
core 1 20c
core 2 20c
didn't test under load
---------------------------------------------------------
Coolit Freezone Elite set on high

E8400 @ 4ghz core v1.32 in windows

CPU
idle 23c
core 1 30c
core 2 31c

Tested under load 100%
CPU 42c
core 1 48c
core 2 49c
----------------------------------------------------------

What stands out is the core temps. Every CPU I've had always showed a lower core values than the CPU temp. With this new CPU the core temps are much higher, indicating there is something wrong with the Wolfsdale sensors.
Testing was done with Everest v4.20.1264 and Coretemp v0.96.1


PACO
----------------------------------------------------

Win XP Pro w/SP2
Coolit Freezone Elite (TEC)
E8400@4.0ghz, core voltage 1.32 in windows
2 gig DDR OCZ PC2-8500
2x 400gig drives
2x Raptor 10,000RPM drives
1 DVD Burner
SB Audigy 2
2x BFG 8500gt @SLI
EVGA 680i SLI motherboard
900 Gamers Case
600w powersupply
G25 racing wheel
X52 flightstick
Logitech z5500 sound system
26" Acer wide sceen monitor

[anna99]

Originally Posted by flopper1

Found out my issue though, 62c
concav IHS made poor contact.
plugged back my e6750 and temps down to normal.
RMA back my e8400 since I need to lap the cpu for it to fit and that seems silly for a new cpu.

My e6750 has no lapping and works flawlessly.

i am going to exchange a diff 8400 to see if the core temp drops.

[Evilsizer]

Originally Posted by anna99

i am going to exchange a diff 8400 to see if the core temp drops.

dont waste your time, changing cpus doesnt change the fact that coretemp doesnt support that cpu.

[jason4207]

Originally Posted by Paco572

I have the E8400, using the Coolit Freezone Elite. I'll show before and after specs.

Before:
Thermaltake Big Typhoon 120mm Silent Heatpipe Cooler
E8400 default 3ghz
CPU
idle 35C
core 1 44c
core 2 45c
didn't test under load.
---------------------------------------------------------
My previous CPU the E6850 @ 3.6ghz core v1.41 in windows

CPU
idle 35c
core 1 20c
core 2 20c
didn't test under load
---------------------------------------------------------
Coolit Freezone Elite set on high

E8400 @ 4ghz core v1.32 in windows

CPU
idle 23c
core 1 30c
core 2 31c

Tested under load 100%
CPU 42c
core 1 48c
core 2 49c
----------------------------------------------------------

What stands out is the core temps. Every CPU I've had always showed a lower core values than the CPU temp. With this new CPU the core temps are much higher, indicating there is something wrong with the Wolfsdale sensors.
Testing was done with Everest v4.20.1264 and Coretemp v0.96.1


PACO
----------------------------------------------------

Win XP Pro w/SP2
Coolit Freezone Elite (TEC)
E8400@4.0ghz, core voltage 1.32 in windows
2 gig DDR OCZ PC2-8500
2x 400gig drives
2x Raptor 10,000RPM drives
1 DVD Burner
SB Audigy 2
2x BFG 8500gt @SLI
EVGA 680i SLI motherboard
900 Gamers Case
600w powersupply
G25 racing wheel
X52 flightstick
Logitech z5500 sound system
26" Acer wide sceen monitor

Huh? The 'core' should be the hottest reading no matter what. The core is where the heat is generated in the CPU. Nothing in or around the CPU area will get any hotter. The software is not working correctly. Everest temps are spotty at best. CoreTemp has traditionally been a good tool, but nobody really knows for sure yet what is going on w/ the temps on these Wolfdales.

Best bet would be to just use common sense. Double-check your mount to make sure you're doing it right, and then start OCing as usual. Don't go above 1.45v, and if you think you are having heat related issues then check the HS w/ your finger and see how hot it is. From what I've read so far it seems that w/ decent cooling you'll be able to go all the way to 1.45v, and not have too many heat related issues. Maybe running a throttle-watch program (if they support Wolfdale) would be a good idea as well.

[madzero1]

Hey ya'll

I just got my E8400 today and i'm having the same issues as everyone else. At stock cooling it gives me 40C in the bios at idle, and at 3.8ghz it gives me 42C at idle! When I load up Coretemp my idle temps are 32C for core 0 and 46C for core 1 at stock cooling and almost the same at 3.8ghz! I noticed on many other forums that "know-it-all" forum gurus are saying that people aren't applying their thermal paste correctly or that the IHS is misaligned etc etc without even buying an E8400 themselves. I think their analysis is wrong, IMO. This many people can't be incorrectly applying their thermal paste and heatsinks. I'm surprised nobody's mentioned this on the forums but If you notice, all the screenshots of people having problem with E8400s/CoreTemp right now are always showing Core 0 much cooler than Core 1. If the issue were a misaligned IHS I would imagine this would vary from proc to proc and batch to batch. Either way my comp is running at 3.8ghz very stable right now at 1.31 volts in BIOS (even though its only using 1.26 under full load). Been running Prime95 on both cores for hours now. My abit EQ is giving me a CPU temp of 66C and Core temp is reading 63C-77C. An interesting thing i've noticed is that the processors always tend to be around 10-15C apart in Core Temp, whether idle or working. When I run Prime95 on just the 2nd core, the difference becomes smaller. Who else is with me that Intel gaffawed on the hardware level when it comes to reporting core temps for the 2nd core??? Well anyways thanks for reading. I'll see what happens after the arctic silver breaks in after a few days. I've included a pic for people's convenience.

Also:
Hipcrostino: I believe the rumor you are talking about is located here: http://www.guru3d.com/newsitem.php?id=6317

Originally Posted by Hipcrostino

Lenovo, the major laptop vendor, has sent back all thier E8xxx cpus because of "issues with temperature sensors" (i saw this in another thread here, so i have no referance, srry).

[Paco572]

Originally Posted by jason4207

Huh? The 'core' should be the hottest reading no matter what. The core is where the heat is generated in the CPU. Nothing in or around the CPU area will get any hotter. The software is not working correctly. Everest temps are spotty at best. CoreTemp has traditionally been a good tool, but nobody really knows for sure yet what is going on w/ the temps on these Wolfdales.

Best bet would be to just use common sense. Double-check your mount to make sure you're doing it right, and then start OCing as usual. Don't go above 1.45v, and if you think you are having heat related issues then check the HS w/ your finger and see how hot it is. From what I've read so far it seems that w/ decent cooling you'll be able to go all the way to 1.45v, and not have too many heat related issues. Maybe running a throttle-watch program (if they support Wolfdale) would be a good idea as well.

Every CPU I've own has been the same with the core always lower than the CPU temp. Since coretemp always seems to match Everest, just how am I going to know for sure? Seems to me these programs work and I have no reason not to trust them. In fact most of the information in this thread is based on one or the other of these programs and the issues with wolfsdale seem to appear as a result these programs finding issues with the wolfsdale.

PACO

[anna99]

temp problem solved,i exchanged a brand new cpu with diff batch#,now my cpu temp is 29-33C core0 temp is 27-32c core1 temp stays 42c unchanged,when i stress test cpu temp max at 57c core0 at 57c core1 at 56c,much better than 6xC before.runing at 4.05ghz with 1.30v,i am happy cause i can match other people's cool temp now,but there still some people can get their coretemp at 40ish C under load.

my chilltec cooler reader reads idle is 24-25c,load at 27c.seems too low to be true.

i also had a voltage jumping up and down problem with my zalman zm600,replace with a corsair tx750,voltage much stable now,and i also get a much more accurate +12v and +5v. output.

the only problem left now is my chilltec cooler fan still speed up for a sec then slow down for another sec,doing this loop most of the time.

[Hipcrostino]

Originally Posted by madzero1

Hipcrostino: I believe the rumor you are talking about is located here: http://www.guru3d.com/newsitem.php?id=6317

yeah thats the one. Thanks

[madzero1]

So even your new CPU has a strange 10-15C difference at all times, correct?

Originally Posted by anna99

temp problem solved,i exchanged a brand new cpu with diff batch#,now my cpu temp is 29-33C core0 temp is 27-32c core1 temp stays 42c unchanged,when i stress test cpu temp max at 57c core0 at 57c core1 at 56c,much better than 6xC before.runing at 4.05ghz with 1.30v,i am happy cause i can match other people's cool temp now,but there still some people can get their coretemp at 40ish C under load.

my chilltec cooler reader reads idle is 24-25c,load at 27c.seems too low to be true.

i also had a voltage jumping up and down problem with my zalman zm600,replace with a corsair tx750,voltage much stable now,and i also get a much more accurate +12v and +5v. output.

the only problem left now is my chilltec cooler fan still speed up for a sec then slow down for another sec,doing this loop most of the time.

[HaTaX]

Hmm, anna99 did you get your CPU at a store? I got mine from microcenter and have since destroyed the plastic box and such but have retained the cardboard box itself. Maybe I should see if they will do an exchange as my temps reported by coretemp are about Core 1:68c Core 2:64c max. That seems a little warm to me and I would guess they're probably closer to 60c or so max, but that seems to be a large margin of error.

[anna99]

Originally Posted by HaTaX

Hmm, anna99 did you get your CPU at a store? I got mine from microcenter and have since destroyed the plastic box and such but have retained the cardboard box itself. Maybe I should see if they will do an exchange as my temps reported by coretemp are about Core 1:68c Core 2:64c max. That seems a little warm to me and I would guess they're probably closer to 60c or so max, but that seems to be a large margin of error.

the one i bought from microcenter had temp issue,i got the cooler one from frys

[Joeflyer]

Hmmm, I got the E8400 the other day for my ASUS P5N32-E SLI mobo, after having the E6750 chip already, installed it, updated the BIOS and found that it isn't compatible with my mobo! How disappointing for sure. I had called ASUS before I ordered the CPU and they said it was compatible. Go figure! I called them again yesterday, got a different tech person, and was told this CPU is NOT compatible...even if it is a socket 775. The tech person said that even though it's a socket 775, it is not compatible across the board with all 775s mobos. So, the new CPU was boxed up and sent back to MWave.com for a refund. Again, how disappointing.

[anna99]

Originally Posted by Joeflyer

Hmmm, I got the E8400 the other day for my ASUS P5N32-E SLI mobo, after having the E6750 chip already, installed it, updated the BIOS and found that it isn't compatible with my mobo! How disappointing for sure. I had called ASUS before I ordered the CPU and they said it was compatible. Go figure! I called them again yesterday, got a different tech person, and was told this CPU is NOT compatible...even if it is a socket 775. The tech person said that even though it's a socket 775, it is not compatible across the board with all 775s mobos. So, the new CPU was boxed up and sent back to MWave.com for a refund. Again, how disappointing.

your board has to say support 45nm cpu

[jason4207]

Originally Posted by anna99

your board has to say support 45nm cpu

Not true. A lot of boards were released way before 45nm, and a lot of them have gained 45nm support through updated BIOS's. Most P965, and P35 boards have gained 45nm support through updated BIOS's.

[Paco572]

I e-mailed Intel abut the sensor problems
Heres what intel said about senors problems, talk about a load.

First,
My e-mail, by the way I did copy and paste some info from this thread to get things started.

the temp probs in the E8400 are stuffed. The Coolest (the guy who
makes coretemp) reports that according to Intels spec, his program is
reading the temps correctly. In other words, coretemp is reading what
the cpu is telling it. Case and point, my E8400. According to
coretemp, one core is locked at 43c, the other at 51c. They will not
read any lower than this, ever... Once the temp moves above these
values its starts to rise, but other report completely frozen probs
(sometimes just reading 7c!). My motherboard reports 34c on the cpu
all the time, i have never seen it move off this value (this may be
fixed in future bios though). Nevertheless, there seems to be
problems with the sensors being reported on many websites, can you
confirm this and when will the recall take place?

-------------------------------------------------------------------
Intels response,

The maximum operating temperature of the Intel(R) Core(TM) 2 Duo
processor E8400 is 61.4 degrees Celsius. As long as the processor is
operating under this temperature it is operating within
specifications. We recommend setting any thermal alarms about three
(3) degrees below the maximum recommended temperature for the
processor. We do not have a normal operating temperature for the
processor as this temperature will vary depending on the chassis and
other hardware installed on the system as well as the actual load the
software is placing on the processor.

You do not need to worry about the temperature of each core, you only
need to pay attention to the CPU temperature itself.

Currently we do not have any report on sensor problems with the
Intel(R) Core(TM) 2 Duo processor E8400.

----------------------------------------------------------------------
Well I'll take that with a grain of salt!!!

---------------------------------
****UPDATE*****

That idiot at intel gave the wrong information on the E8400, the true CPU TEMP MAX IS 72.4c and the Tjunction core values remain 105c.

Here's the link to see for yourself
http://processorfinder.intel.com/det...px?sSpec=SLAPL
-------------------------------

PACO

[anna99]

based on other forums,e8400 has a temp bug which will not report right temps.i just exchanged another cpu for testing.both core idle at 42c now,max load core goes up to 60/59.3c higher than the 2nd cpu,but cpu temp at load is 2c lower and idle is 5c higher.chilltec reads same for all 3 cpus,24-25c.idle,and it hardly go up when stress testing.

[OC nub]

While it sucks that people are having temp reading issues with the 8400, they overclock like a beast, I finally hit 4.0+ with very low voltage. To RMA this chip because of temp reading issues to me would be stupid. I am hitting 4050@1.3125v 19 hrs orthos stable, 3.9@1.2625v 8 hrs orthos stable, 3.6@1.2v and 3.3@1.125v orthos stable for 8 hrs. With my luck Id get a chip with good temp readings that oc'd like poop.
I say burn em up boys. Im going to enjoy it as long as it lasts and not worry about it. No offense to anyone but never heard so many people complain about a chip hitting 4.0 on low voltages before.

[Oc1Kenube]

Originally Posted by OC nub

While it sucks that people are having temp reading issues with the 8400, they overclock like a beast, I finally hit 4.0+ with very low voltage. To RMA this chip because of temp reading issues to me would be stupid. I am hitting 4050@1.3125v 19 hrs orthos stable, 3.9@1.2625v 8 hrs orthos stable, 3.6@1.2v and 3.3@1.125v orthos stable for 8 hrs. With my luck Id get a chip with good temp readings that oc'd like poop.
I say burn em up boys. Im going to enjoy it as long as it lasts and not worry about it. No offense to anyone but never heard so many people complain about a chip hitting 4.0 on low voltages before.

Well i need 1.4375v to hit 4ghz and i cant get temps to read properly so i think i have cause to complain

[OC nub]

Originally Posted by Oc1Kenube

Well i need 1.4375v to hit 4ghz and i cant get temps to read properly so i think i have cause to complain

I agree, if I had a poor overclocking chip I'd try and RMA it also.

[forceman]

I find it a little hard to believe that there is a systemic problem with the temp sensor on the chip itself. Surely Intel is clued in enough to actually test the temp sensor before they make hundreds of thousands of these things and send them out. It's not like this is an error that impacts a tiny fraction of computations or something, like some of the other errata they've had. Given the recent bad press about the AMD TLB bug and the possible problems with Quads and 4 layer boards I wonder if they would be stupid or arrogant enough to release the chips with such a serious problem.

[Jkicak]

at stock speed my E8400 reads 59/53 idle

[pirus]

Hi @ all!

I'm Pirus from italy!

I have a E8400 Batch q744a + Asus P5E bios 502

I have the problem with 2 single core temperature!

@ idle & default setting (vcore 1.20),with coretemp & everest last beta the core 1 is @ 21° & the 2nd core @ 38°!!!

[Rav]

FYI to forum members, this thead is being linked to from an INQUIRER article.

[PaNoS]

The two cores on my E8400 also have a huge temp difference when idle. Sometimes its as much as 12-15c. They get closer temp readings when i'm running prime95. I'm not too worried about it...I can turn my Tuniq 120 down to 900rpm while surfing the web and the hottest core won't go above 38c, while the other core won't exceed 32c.

My goal was to have a 4GHz pc 24/7 that's rock solid stable. The 8400 makes it easily possible

[PaNoS]

Originally Posted by Jkicak

at stock speed my E8400 reads 59/53 idle

That doesn't sound right...Are you using the latest version of coretemp? Make the heatsink is seated correctly. Sounds like it might not be making good contact.

[smilingcrow]

Has anyone tested whether thermal throttling is working on these CPUs?
If I had one I’d use RMClock to watch for throttling; use the stock Intel heatsink and disable the fan and run Orthos. Obviously keep a close eye on temps so you can stop Orthos if it looks like the throttling isn’t working. If throttling kicks in with the DTS temps reading about 105C then it suggest that the DTS is doing its job which is controlling thermal throttling. Provided throttling works and the DTS temps are accurate in the higher range, the fact the sensor isn’t giving accurate readings at lower temps at idle seems a very minor inconvenience.
The DTS is there to control throttling which maybe is the only thing that Intel tested it for.

[Jkicak]

Originally Posted by PaNoS

That doesn't sound right...Are you using the latest version of coretemp? Make the heatsink is seated correctly. Sounds like it might not be making good contact.

running core temp 0.96.1

i'm quite sure it is seated correctly... it was a PITA to get it to lock in the place on the mobo but i don't see how it would not be seated correctly. i guess i could take it apart tonight are reseat it but i'm not sure this is the issue.. it COULD be the thermal compound from the retail HSF got messed up as i was fighting to get the heatsink attached to the mobo.