CPU Temp Question Concerning Core 2 Quad
in [Asus]
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From: soinie on 26 Jan 2008 18:57 I'm running a Core 2 Quad 6600 2.4 ghz and the temp when idle is about 25C according to Asus PC Probe II, although I've seen it up to 34C with tasking. I want to moderately over clock this (P5E WS Pro) setup and would like to know what to look for in terms of temp increases and what might be considered a threshold temp. I'm using a Scythe Mini Ninja and Arctic Silver 5, and thanks to those who recommended an after-market heat sink.
From: GSV Three Minds in a Can on 26 Jan 2008 19:27 Bitstring <6ghnp3p7pup116oks9os30jn19s8nnvpph(a)4ax.com>, from the wonderful person soinie(a)hhotmail.com said >I'm running a Core 2 Quad 6600 2.4 ghz and the temp when idle is about >25C according to Asus PC Probe II, although I've seen it up to 34C >with tasking. I want to moderately over clock this (P5E WS Pro) setup >and would like to know what to look for in terms of temp increases and >what might be considered a threshold temp. I'm using a Scythe Mini >Ninja and Arctic Silver 5, and thanks to those who recommended an >after-market heat sink. Heat is not going to be the problem - there is a thermal protection mechanism on the die, iirc, and probably another on the motherboard, and you are ~30 degrees the right side of a problem anyway. If the CPU gets too hot it will throttle the clock back. If you (have to, or choose to) ramp the VCore up too far in pursuit of extra GhZ then you may fry something .. but It'll be volts and not degrees C that does the damage. Before you go overclocking though, try a PROPER stress test at your current clock rate - Prime95 torture test (maybe 4 copies, one pointed at each core - I don't think the current one knows about loading more than one core at once). 34c is 'loafing' IMO, but then it's hard to really work 4 cores in everyday use. This assumes it's being measured right - not always the case with Asus Mobos (what's the case temperature registering at? Heck, how cold is the room it is in??) -- GSV Three Minds in a Can 10,414 Km walked. 2,032 Km PROWs surveyed. 36.9% complete.
From: Paul on 26 Jan 2008 20:57 GSV Three Minds in a Can wrote: > Bitstring <6ghnp3p7pup116oks9os30jn19s8nnvpph(a)4ax.com>, from the > wonderful person soinie(a)hhotmail.com said >> I'm running a Core 2 Quad 6600 2.4 ghz and the temp when idle is about >> 25C according to Asus PC Probe II, although I've seen it up to 34C >> with tasking. I want to moderately over clock this (P5E WS Pro) setup >> and would like to know what to look for in terms of temp increases and >> what might be considered a threshold temp. I'm using a Scythe Mini >> Ninja and Arctic Silver 5, and thanks to those who recommended an >> after-market heat sink. > > Heat is not going to be the problem - there is a thermal protection > mechanism on the die, iirc, and probably another on the motherboard, and > you are ~30 degrees the right side of a problem anyway. If the CPU gets > too hot it will throttle the clock back. > > If you (have to, or choose to) ramp the VCore up too far in pursuit of > extra GhZ then you may fry something .. but It'll be volts and not > degrees C that does the damage. > > Before you go overclocking though, try a PROPER stress test at your > current clock rate - Prime95 torture test (maybe 4 copies, one pointed > at each core - I don't think the current one knows about loading more > than one core at once). > > 34c is 'loafing' IMO, but then it's hard to really work 4 cores in > everyday use. This assumes it's being measured right - not always the > case with Asus Mobos (what's the case temperature registering at? Heck, > how cold is the room it is in??) > I would find a utility that uses the internal CPU temp sensor. I haven't tested these. They read out the digital temp sensor. Programs like Asus Probe would likely be reading the analog sensor (CPU diode + hardware monitor chip). Intel Thermal Analysis Tool (TAT) - this was not intended for public distribution, but is used by overclockers. There may be a later version, but I'm not going to search all over for it. This is just the first copy I found. http://www.techpowerup.com/downloads/392/.html This one does a similar measurement, and was not written by Intel. CoreTemp http://www.alcpu.com/CoreTemp/ Both of those programs rely on knowledge of Tj_max. That is the maximum junction temperature before the processor starts to throttle. The reason the measurement programs need to know that constant, is the measurement mechanism has a "relative" and not an "absolute" temperature readout. In other words, if Tj_max is 85C and the measurement returns a value of zero, then the calculated temperature is 85C. If the value returned is two, then the calculated temperature is 83C. Something like that. So it is important to know the Tj_max of the processor types. A 65nm processor could have a different Tj_max than a 45nm processor. The various families, because they have different die sizes and quantities of cache, and different power dissipation numbers, will also have a different Tj_max. So the measurement tool needs a table of values, to compute an absolute value from the relative readout. When those two measurement programs give a wrong result, the theory is that the Tj_max value is wrong. Maybe Speedfan (almico.com) can read the digital temp sensor. The release notes here, says the capability to read it was added in version 4.32. Current release is 4.33. http://www.almico.com/speedfan.php So the issue with programs like that, is that they've been updated with the latest values of Tj_max. To load the CPU to 100%, this version of Prime95 will run on all four cores at once. To use this program, when it asks to "Join GIMPS ?" say No. Next, a custom dialog will appear. The maximum memory to be tested will be shown in the lower right hand corner. On my 1GB machine, it shows 767MB as the amount of memory to test. I edit this value, and select something smaller, like 200MB. By doing that, enough memory is left on the computer, so I can do other things while Prime95 runs. You can leave the other settings as is. When you are finished with that dialog, the program will launch a number of threads. For a Q6600, you should see four threads launched. And your processor should start to heat up. The program has a "stop" and "exit" option in the left-most menu, so when you're finished, you can use that menu to get rid of the program. http://www.mersenne.org/gimps/p95v255a.zip http://www.majorgeeks.com/Prime95_d4363.html (if mersenne is down, use this one) When I want to do an actual integrity test, and not just heat up the CPU, then I might set the memory to test back to the 767MB value, as then as much of the available memory is tested as is possible. Those are the tools I know about. Have fun :-) Paul
From: GMAN on 27 Jan 2008 00:35 In article <ECJxinBLA9mHFA2+(a)from.is.invalid>, GSV Three Minds in a Can <GSV(a)quik.clara.co.uk> wrote: >Bitstring <6ghnp3p7pup116oks9os30jn19s8nnvpph(a)4ax.com>, from the >wonderful person soinie(a)hhotmail.com said >>I'm running a Core 2 Quad 6600 2.4 ghz and the temp when idle is about >>25C according to Asus PC Probe II, although I've seen it up to 34C >>with tasking. I want to moderately over clock this (P5E WS Pro) setup >>and would like to know what to look for in terms of temp increases and >>what might be considered a threshold temp. I'm using a Scythe Mini >>Ninja and Arctic Silver 5, and thanks to those who recommended an >>after-market heat sink. > >Heat is not going to be the problem - there is a thermal protection >mechanism on the die, iirc, and probably another on the motherboard, and >you are ~30 degrees the right side of a problem anyway. If the CPU gets >too hot it will throttle the clock back. > >If you (have to, or choose to) ramp the VCore up too far in pursuit of >extra GhZ then you may fry something .. but It'll be volts and not >degrees C that does the damage. > >Before you go overclocking though, try a PROPER stress test at your >current clock rate - Prime95 torture test (maybe 4 copies, one pointed >at each core - I don't think the current one knows about loading more >than one core at once). > >34c is 'loafing' IMO, but then it's hard to really work 4 cores in >everyday use. This assumes it's being measured right - not always the >case with Asus Mobos (what's the case temperature registering at? Heck, >how cold is the room it is in??) > Well in my case, mighty chilly with the 3 120mm fans and the 200mm blowhole in my Antec Nine Hundred case!
From: soinie on 27 Jan 2008 20:39
On Sun, 27 Jan 2008 00:27:55 +0000, GSV Three Minds in a Can <GSV(a)quik.clara.co.uk> wrote: >Bitstring <6ghnp3p7pup116oks9os30jn19s8nnvpph(a)4ax.com>, from the >wonderful person soinie(a)hhotmail.com said >>I'm running a Core 2 Quad 6600 2.4 ghz and the temp when idle is about >>25C according to Asus PC Probe II, although I've seen it up to 34C >>with tasking. I want to moderately over clock this (P5E WS Pro) setup >>and would like to know what to look for in terms of temp increases and >>what might be considered a threshold temp. I'm using a Scythe Mini >>Ninja and Arctic Silver 5, and thanks to those who recommended an >>after-market heat sink. > >Heat is not going to be the problem - there is a thermal protection >mechanism on the die, iirc, and probably another on the motherboard, and >you are ~30 degrees the right side of a problem anyway. If the CPU gets >too hot it will throttle the clock back. > >If you (have to, or choose to) ramp the VCore up too far in pursuit of >extra GhZ then you may fry something .. but It'll be volts and not >degrees C that does the damage. > >Before you go overclocking though, try a PROPER stress test at your >current clock rate - Prime95 torture test (maybe 4 copies, one pointed >at each core - I don't think the current one knows about loading more >than one core at once). > >34c is 'loafing' IMO, but then it's hard to really work 4 cores in >everyday use. This assumes it's being measured right - not always the >case with Asus Mobos (what's the case temperature registering at? Heck, >how cold is the room it is in??) The motherboard temp is 32C idle the CPU temp currently is 28C, the room is about 76F. I'm using a Seasonic S12 Energy 550 watt power supply which runs generally very stable. I'll download Prime95 and run a few tests. Thanks for that. |