"Big Man" said:
Hello
Thanx for the quick respons.
I just installed the Probe utility from ASUS and the cpu-temp is about 50
degrees doing nothing, and 68 degrees full load.
I'm looking at the taskmanager too and when LAME is running it displays 1st
CPU at 100 % load, the "other" CPU displays 5 % load, this is the
Hypertrading I guess, is this the normal behaviour, and if so, when turning
off the Hypertrading in Bios will the CPU work at 3.2 Ghz??
BTW the temperature report is normal with the Intel Coolers, I've been
reading about it somewhere and that guy had the same problem.
Greetz, Big
As I understand it, Hyperthreading is properly supported in WinXP,
and when a new program is launched, it will be run on the "least
loaded" virtual processor. The virtual CPU with the 5% is probably
running background tasks etc.
The CPU runs at 3.2GHz whether Hyperthreading is enabled or not.
Hyperthreading uses two sets of registers, such that if one
thread is blocked, due to a data dependency, then another thread
pointed to by the other set of registers, can be allowed to run.
Hyperthreading makes better use of processor resources, but
sometimes at the expense of counter-productive access patterns
to the memory. I would say it is generally better to leave it
enabled.
To make best use of Hyperthreading, try running two copies of
LAME. That way, you make the most of the processor.
If you turn off Hyperthreading, then WinXP will see one processor,
and you will save some electricity. For a single threaded process,
that might give you a better benchmark. Run one copy of LAME with
Hyperthreading disabled and see.
There is a description of Prescott thermal control here:
ftp://download.intel.com/design/Pentium4/guides/30056401.pdf
I've tried searching, but cannot find a utility that reports the
state of PROCHOT. I'm pretty sure you are suffering from thermal
throttling. While the Intel document doesn't say it, I expect
PROCHOT triggers at 70C or slightly less.
One suggestion I read, from someone running as hot as you, was to
remove the heatsink, clean off the Intel provided thermal solution
(pad?), and replace with Arctic Silver 5 thermal compound. Apply
only a thin layer, and do not apply so much that is oozes out.
(If that compound contaminates the LGA775 socket, you are in big
trouble. LGA775 socket is a worse design than S478.)
Applying thermal compound dropped the temperatures by 10C for that
poster. Also, inspect your installation and make sure that the
heatsink is sitting flush and making good contact with the CPU. I
like to install and inspect the HSF while the motherboard is outside
the case, to make sure it is properly installed. Whether you can
do that, depends on whether your computer case has a stiffener bar
that gets in the way of dropping motherboard and HSF directly into
the computer case.
Since there is not a lot of experience with LGA775 in this newsgroup,
there will be a lot of experiments to come, when it comes to making
a good thermal solution for the new boards. It is too bad that third
party LGA775 cooling solutions are not yet available. I would be
especially interested in a heatsink like the Zalman 7000 series, if
they can make an adapter for LGA775. Their web site shows the
7000B supports S478, S462, S754, S939, S940, but no LGA775 yet.
HTH,
Paul
