Re: Overclockable Server Motherboards

"Steve Wolfe" <htr@xxxxxxxxx> writes:
We have a dual-Xeon 5160 box with 24GB of RAM based on the SuperMicro
X7DBE+ and are happy with it. The only funny thing is that, when we
turn it on, it does not show any sign of working for about one minute.

With ECC, it has to go through and zero out all of the memory so that ECC
operation can be reliable.

Good theory. I would expect it to initialize the graphics card and
the keyboard first, though, and only initialize most of the memory
afterwards, just like the classical RAM test does. We had no
indication that the machine was working at all, and turned it off
after a while the first few times, and checked that all the cables
were plugged in etc. We even thought that we would have to send it
back as defective, but luckily before we did that, we once left it on
long enough that we did get signs of life.

Also, a single process under Linux can zero the memory on that machine
at 1.4GB/s, so the zeroing could be done in 17s, but the BIOS takes
around a minute.

- anton
--
M. Anton Ertl Some things have to be seen to be believed
anton@xxxxxxxxxxxxxxxxxxxxxxxxxx Most things have to be believed to be seen
http://www.complang.tuwien.ac.at/anton/home.html
.

Relevant Pages

  • Re: Problem only in release version!
    ... not executed in Release mode (I believe, but I also thought Debug ... initialized variables to zero, ... The Release version will not initialize anything 'naturally' ... >>the contents of the memory addresses they happen to get assigned to). ...
    (microsoft.public.dotnet.languages.vc)
  • Re: Problem only in release version!
    ... The debug version doesn't initialize anything to zero that isn't ... the debug heap manager sets memory to certain non-zero values ...
    (microsoft.public.dotnet.languages.vc)
  • Re: malloc under linux
    ... the allocated memory to "all bits zero". ... references the allocated space to obtain memory and initialize it to all ...
    (comp.lang.c)
  • Re: simulating xilinx block ram with modelsim
    ... The test bench should initialize memory ... attributes of the BLKRAM to initialize values. ... well of course i checked my input signals and i applie values to them. ...
    (comp.arch.fpga)
  • Re: If forget to fclose() after fopen(), is there any testing tool who can detect it automatically?
    ... >> We all know that fclosemust be called after file operations to ... >> importance of freeing the allocated memory, ... Wherever you declare the FILE* variable, initialize it to NULL. ... Initializing FILE pointers to NULL when they are ...
    (comp.lang.c)