JohnthePilot

My core temps are in the mid 60s so until I can sort this out I'm going to have to stop folding.

WereBo

I doubt I'll catch up that much, by the time you get back again

Tiber Septim

Good luck JtP. I also had to stop because my GPU died and the CPU client makes my computer barely usable.

mattlock

Hi John, is it just because of the location of your system?

What was your load temps before summer came rolling around?

Are you using the stock cooler with the OEM thermal paste?

Tiber,
You can run the single core CPU client and shouldn't even notice it run on your dual core. Your point production won't be very good, but you would still be contributing to the science.

Just curious, what kind of gfx card were you running?

JohnthePilot

Hi Matt,
Yes, My machine is in a garret and it's like a sauna. I've got the case off and a desk fan pointing into the inards. Even without folding my temps are 47 and 44 respectively.

mattlock

What tool are you using to read your temps?

Temps in the mid 60's is not a real danger point.... Higher than one would like on 24/7?.... sure but not dangerous. You are still 25-30c under TJmax and 40c+ away from thermal shutdown.

Are you running the stock fan and paste, or did you use Arctic Silver 5? AS5 could yield as much as a 10 degree drop in temps if you are currently using stock/cheap paste. I know this for a fact. Before I built my current E8400 system, I had an overclocked AMD FX60 and my temps where running 65-67c under load (TJmax was allegedly 65c). I ran it that way for close to a year (run the SMP CLient), the whole time thinking I had used AS5. Then I switched to an SLI motherboard to improve airflow to my video card and realized that I didn't use AS5.(I was out of it when I got the FX60, so I installed the CPU with cheap paste that came with an aftermarket heat sink with intention of replacing it once I got some AS5 and it slipped my mind). Applied AS5 when I swapped MBs and the core temp never broke 55c again. Since then, I've never installed a CPU with AS5.

Just some food for thought. At the end of the day you have to do what makes you comfortable. I know a lot of people that start getting stressed out if the CPU temp starts sniffing 50c.

Tiber Septim

Didn't mean to hijack John's thread. I did decide to try the single core client, currently running now. It's just a lot slower the the GPU2 client.

I was previously running an 8800GTX. Will be purchasing a new system soon so I should be able to contribute quite a bit more.

Glaswegian

Running the SMP client, my core temps are around a steady 52 - 54C. I really need to take the case outside and blow out any dust etc - haven't done that for a few months.

JohnthePilot

I'm using Core Temp (recommended by Nicholas). According to this site, 72.4°C is the critical temp for the E8400. I am using AS5 but the clips on the GigabyteGA-EP35 mobo don't seem that tight. I may try the lapping technique described by turbines here.

mattlock

When you open Core Temp you'll see something called TjMax, Core Temp shows 105c. This is your max "core temp". The 72.4c that is referred to on that site is the "Max Case Temp" which is defined as the max temp at the center of the heat shield. So it's an Apples to Oranges comparison. Core Temp and Real Temp read the thermal sensor that is embedded in the actually die and not an external sensor, which is what would be required to read the Case temp the site above refers to.

Now to the differing opinion of the makers of Core Temp and Real Temp. Real Temp believes the Tjmax to be 95c Core Temp 105c. Real Temp did testing with an IR scanner to determine the TjMax. (I use Core Temp myself but alter the config file so the TjMax is 95c rather than 105c. I like the interface better) Either way, you're not as close to the max temp as you were led to believe.

Edit:
Just downloaded the latest version of Real Temp and Core Temp, the Tjmax is now set to 100c for both programs. A meeting of the minds???

Glaswegian

I use CoreTemp. Reading John's link, it said my CPU max was 60C - C2D E6750 - is that not really true then?

WereBo

I've been using 'PC Wizard 2008' for a while, mainly for monitoring temps, voltages and fans. It's amazing the differences that the different sensors display though, up to 6C difference for the Processor temperature, depending on the sensor.

My Asus mobo came with a utility called 'PC Probe II' which gives the relevant info for the CPU, but nothing else - That shows the temp being the same as the NVidia hardware monitoring, the thermal diode sensor seems to be the worst for accuracy.

mattlock

Iain,

Since you are using Core Temp you should go with the Tj Max as listed by the Core Temp utility. Tcase Max is roughly 25-30c lower than Tj Max. See the thing is that absolute temp and absolute Tj Max is not so absolute. Intel doesn't define what absolute max temp, in fact they now refer to it as the Tj Target.

Latest Version of Core Temp

mattlock

That is the Digital Thermal Sensor (DTS) that Core Temp and Real Temp get their info from. It's embedded in the die and reports the internal temp of the die, which is always going to higher than any other area of the cpu.

JohnthePilot

I'm using the latest version of Core Temp. this is what I get with both cores running F@H.

Glaswegian

Thanks Matt.

The TJmax is 100C.

Actually, I had a look in the FAH config file and found I'd set CPU usage at 97%! I've turned that back to 88% and my temps are now steady at 48C-49C.

WereBo

Aaahhhh - thanks for that, Matt - I'll carry on trusting it then

JohnthePilot

You should be so lucky. that's what I get when I'm not folding.

mattlock

John,

Again, I wouldn't be extremely worried about those temps, but the lower the temp the better (especially for someone that doesn't upgrade very often) and there are a couple things you can do to make it a little better. Your highest reading on either core is 65c. I think we can tweak a couple of things and get that down below 60c. While still contributing to F@H.

One option is to lower the CPU usage in the config file as Iain did. Then your cores won't run at 100% which will drop your temp.

Another option is to lower your Vcore a bit. Voltage = Heat so by lowering the Vcore the Core temp will drop.

Since you're not OCing your CPU we should be able to get your Vcore down to at least 1.20v and maybe lower while remaining stable. It's just the luck of the draw. I've heard of some E8xxxs running at under 1.5v. Mine is OCed to 3.6 and running 100% stable @ 1.20v. The lowest I've gotten it to run stable with no OC is 1.8v

The third option is to invest in a better heatsink.

I do think that your HS might not be seated properly though. To be idling at ~50c even in a hot room isn't right. Can you get some more info?

First the ambient temp of the garret.
Second, down CPU-Z and post back here with the Core Voltage.

@ Iain and Bo,

You are Welcome.

JohnthePilot

Thanks Matt. As soon as I can find some spare time I'll re seat my HS. Core voltage is 1.152V. I'll also check out the room temp.