E6750 Idle Temps - Do They Look About Right?

Jason W · Post by **Jason W** » Tue Aug 21, 2007 9:02 pm

E6750 at stock speed (2.66GHz)
Vcore of 1.3V
GA-P35-DS3R motherboard
Fanless Ninja Rev. B attached with pushpin bracket
Fanless Gigabyte GeForce 7600GS
P182 case
120mm Nexus @ 12V on rear exhaust
120mm Nexus @ 12V in lower chamber

Here's a picture I took. I have Everest, SpeedFan, and Intel TAT all monitoring at the same time. They all seem to be in the same ballpark for CPU and system temps.

http://golfnut.smugmug.com/photos/186598508-O.jpg

Do these idle numbers look good for stock? I don't know my ambient temp exactly, but I have my thermostat at the house set at 75 degrees F.

Thanks for your input.

Jason

Badger · Post by **Badger** » Tue Aug 21, 2007 9:07 pm

can you get a screenshot of what CoreTemp 0.95 says? my guess is that those numbers are 15C too low.

Jason W · Post by **Jason W** » Tue Aug 21, 2007 9:38 pm

So you think all 3 of these programs are off by 15 degrees? That would suck if you are right.

I do not have CoreTemp downloaded. I heard it can cause system crashes, so I figured it wasn't worth a crap... am I misinformed?

Regards.

Jason

derekchinese · Post by **derekchinese** » Wed Aug 22, 2007 12:27 am

core temp should not cause system problems. Many experienced overclockers have used core temp to gauge temps for a long time now. And it could be true that your true temps are what speedfan tells you plus 15C. After all, temps of 25C are near room temperature and your core temps generally should be at least a few degrees above room temp. 40C and 44C idle temps seem alittle bit more plausible.

Derek

Mats · Post by **Mats** » Wed Aug 22, 2007 1:48 am

Jason W: Ctrl + Prt Sc will make a screenshot. Use Ctrl + V in Paint/Photoshop to paste it. Simpler than using a camera.

Jason W · Post by **Jason W** » Wed Aug 22, 2007 4:42 am

Mats wrote:Jason W: Ctrl + Prt Sc will make a screenshot. Use Ctrl + V in Paint/Photoshop to paste it. Simpler than using a camera.

Thanks. Much easier than using a camera on a tripod!

Jason W · Post by **Jason W** » Wed Aug 22, 2007 4:46 am

Okay, here's a screenshot with Core Temp 0.95 as well as the others running at the same time. Again, they all seem to be pretty close...

http://golfnut.smugmug.com/photos/186679445-O.jpg

Please don't tell me they are all wrong! I need to know if these are accurate or not, so that when I attempt to overclock I can accurately monitor temps...

Thanks for your continued help!

Jason

Wibla · Post by **Wibla** » Wed Aug 22, 2007 6:04 am

This looks fine... how much do the temps vary when at 100% load?

buzzlightyear · Post by **buzzlightyear** » Wed Aug 22, 2007 6:14 am

A lot of temp software assume the Tjunction temp for the Txx50 CPUs as 85c. That may be the case sometimes ago. Now Txx50 CPU could have either 85c or 100c. In fact most of them are 100c. Because of this error, a lot of thermal/temp software report the wrong temp-- 15c lower.

Jason W · Post by **Jason W** » Wed Aug 22, 2007 6:47 am

buzzlightyear wrote:A lot of temp software assume the Tjunction temp for the Txx50 CPUs as 85c. That may be the case sometimes ago. Now Txx50 CPU could have either 85c or 100c. In fact most of them are 100c. Because of this error, a lot of thermal/temp software report the wrong temp-- 15c lower.

Buzz, Core Temp reports the Tjunction as 85 degrees C, as you can see in the screenshot above. When you start talking about Txx50 CPUs, you lose me. Are you saying that Core Temp is not reporting the right Tjunction temperature? All I really want to know is if the Tjunction of the E6750 is 85 degrees C, or if it should be 100 degrees C, or seomthing else. And if I need to add 15 degrees C to my core temps to get accurate numbers.

I know this - when I touch the Ninja's aluminum fins, at idle, it doesn't feel much warmer than the air blowing through the case.

Here's another question I have - if the temperatures of the cores don't reach the Tjunction temp, then the cores shouldn't auto-throttle back right?

Further, I am assuming that if my cores, at the stock 333 x 8 = 2667GHz, never cross 55 degrees C as reported by SpeedFan/Core Temp/Everest/TAT while stress tested by Orthos or Prime 95, my cooling should be working properly to allow me to begin overclocking right?

Sorry if all this seems elemental to you experienced PC guys. This is my first build and my first foray into quiet computing and overclocking.

Regards.

Jason W · Post by **Jason W** » Wed Aug 22, 2007 7:06 am

Wibla wrote:This looks fine... how much do the temps vary when at 100% load?

Wibla, I haven't run Orthos or Prime 95 for long periods of time yet to check temps or stability. But when I ran Orthos small ffts for an hour the other night at stock speeds, the temps didn't go over 50 degrees C on the cores.

The reason I haven't done any overnight or multi-hour testing yet is I was nervous about whether the programs were reporting accurate temps or not. I didn't want to have a reported 50 degrees actually be 75 degrees or something.

I'm not yet totally convinced these programs are reporting temps and voltages properly... I could use some additional validation here!

Mats · Post by **Mats** » Wed Aug 22, 2007 9:09 am

How much does your idle temps drop if you enable EIST/C1E?

Jason W · Post by **Jason W** » Wed Aug 22, 2007 6:56 pm

Okay, here is a screenshot of my system after running Orthos Small FFTs for one hour:

http://golfnut.smugmug.com/photos/186894084-O.jpg

As you can see, my temps are not up to 50 degrees C yet at stock. In going back through the TAT log, it appears the core temps reached the 45-47 degree mark about 9 minutes into the test, and have remained there ever since. Seems stable enough for me, especially since I am at stock speeds currently.

By the way, I have my RAM voltage set to +0.2V in the BIOS, and I think I have the Vcore manually set to 1.3V in the BIOS. I have turned off the power-saving functions in the BIOS (EIST and C1 I think is what they are called on the P35-DS3R).

As you can see, temps have stabilized about 17 degrees C higher than at idle. The idle screenshot is after leaving the computer on all night, so it is a good average idle reading.

Assuming these readings are accurate (they can't all be wrong, can they?), I think I am going to bump the FSB from 333MHz to 375MHz to achieve a 3.0GHz speed, not touch the voltage settings, and then leave the PC on overnight to see what the idle temps look like tomorrow morning.

I gladly welcome any comments and dicsussion in this thread about whether my temps look good or not. I personally think they look great. But I am also a complete noob about overclocking and knowing if temps are good or not.

Anyway, be on the lookout for an update tomorrow morning with another screenshot.

Regards.

Jason

Wibla · Post by **Wibla** » Wed Aug 22, 2007 8:08 pm

This is very good! do you have a top exhaust fan at all on your p182?

Jason W · Post by **Jason W** » Thu Aug 23, 2007 4:30 am

Wibla wrote:This is very good! do you have a top exhaust fan at all on your p182?

No. I removed the stock Tri-Cool Fan and blocked off the opening with a piece of tile I bought from Home Depot for $.68 and some masking tape.

Here's a pic - it's not the most polished mod ever, but it's effective:

http://golfnut.smugmug.com/photos/185210230-O.jpg

I have 3 Nexus 120mm fans in the P182 case:
- Rear exhaust fan to pull air across the Ninja (no ducting)
- Lower chamber fan to coll the hard drives and power supply
- Fan on back of upper hard drive cage blowing air across the fanless GeForce 7600GS

Here's a screenshot from this morning, after leaving the computer idle all night at 3008GHz (376MHz x

. The thermostat at my house says it's 74 degrees F (23.3 degrees C) in the house.

http://golfnut.smugmug.com/photos/187022205-O.jpg

I will probably run Orthos again tonight when I get home from work and see what happens. Stay tuned!

zerok66 · Post by **zerok66** » Thu Aug 23, 2007 5:16 am

Right...

I have the same board, same processor, running Vista and using speedfan my results are as follows at idle:

CPU Temp:

25-30 degrees
Core 1: 15 degrees
Core 2: 16 degrees

I am using the OrigenAE X11 HTPC Case which is knows to flow very poorly...

I am using the Thermalright SI-128 cooler with a 120mm fan running at low speed:

My Actual Rig:

Guess it is down to me having the fan directly on the CPU cooler.

Glad I have seen this post as I have been debating getting the scyth mini-ninja as this is the only thing that will fit in my case! Guess I did well selecting the SI-128 and 120mm fan.

zerok66 · Post by **zerok66** » Thu Aug 23, 2007 5:57 am

Another example of this board (VERY similar) and a Ninja (Full size) with the E6750... his results are very similar to mine...

viewtopic.php?t=42462&highlight=

Jason W · Post by **Jason W** » Thu Aug 23, 2007 7:25 am

zerok66 wrote:Right...

I have the same board, same processor, running Vista and using speedfan my results are as follows at idle:

CPU Temp:

25-30 degrees
Core 1: 15 degrees
Core 2: 16 degrees

I am using the OrigenAE X11 HTPC Case which is knows to flow very poorly...

I am using the Thermalright SI-128 cooler with a 120mm fan running at low speed:

Guess it is down to me having the fan directly on the CPU cooler.

Glad I have seen this post as I have been debating getting the scyth mini-ninja as this is the only thing that will fit in my case! Guess I did well selecting the SI-128 and 120mm fan.

I don't think SpeedFan is reporting your temps properly... what is your ambient temperature in the room where your case is located? You can't have core temps of 15 or 16 degrees C unless your ambient room temperature is around 50 degrees F. If that's the case, I wouldn't want your AC bill!

Wibla · Post by **Wibla** » Thu Aug 23, 2007 10:28 am

You should try a top exhaust... i have my setup rigged up with a Nexus in the rear and a noctua in the top, the noctua only spins up when i pass 45-50% fan speed, by then the nexus has been spinning for a while... really helps when the temps are soaring, especially for the passive 7950GT i have, hehe.

Jason W · Post by **Jason W** » Thu Aug 23, 2007 7:35 pm

Okay, now I am totally confused. I downladed and ran the beta version of Core Temp (0.95.4) and it shows the Tjunction to be 100 degrees C, whereas the 0.95 non-beta version of Core Temp shows a Tjunction of 85 degrees C. Due to this change, the beta version of Core Temp now reports my core temps 15 degrees C higher than every other piece of software I have.

Here's a screenshot of my CPU, at the stock 333 x 8 = 2.66GHz speed, while running Prime 95:

http://golfnut.smugmug.com/photos/187245993-O.jpg

At stock, under the full load of Prime 95, my cores seem to have stabilized at about 59 degrees C.

I'm not sure which Tjunction and core temps are right... if the beta version of Core Temp is accurate, then my cooling solution isn't nearly as good as I thought! I may have to take the fan currently attached to the back of the upper hard drive cage and place it directly on the Ninja to see what happens.

Your thoughts?