<br><br><div class="gmail_quote">On Mon, Mar 9, 2009 at 1:18 PM, Louis Lagendijk <span dir="ltr"><<a href="mailto:louis@lagendijk.xs4all.nl">louis@lagendijk.xs4all.nl</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="im">On Sun, 2009-03-08 at 19:27 -0700, John R Pierce wrote:<br>
> Rick wrote:<br>
> > In article <<a href="mailto:20090308031754.GA11794@bludgeon.org">20090308031754.GA11794@bludgeon.org</a>>,<br>
> > Ray Van Dolson <<a href="mailto:centos@centos.org">centos@centos.org</a>> wrote:<br>
> ><br>
> ><br>
> >> That sounds pretty strange. Have you confirmed that removing the "new"<br>
> >> memory allows you to run in runlevel 5 again?<br>
> >><br>
> ><br>
> > Yes, that's how I'm running right now.<br>
> ><br>
><br>
> now, try taking out the OLD memory and putting in just the NEW memory.<br>
> see how it runs that way. if this works, try with the new 4GB as the 0<br>
> bank, and the old 2GB as the 1 bank.<br>
><br>
> also, in the BIOS, check the memory timings, I'd leave them all on<br>
> 'automatic' or 'default' or whatever the limited choices are in the<br>
> Intel BIOS, trying to squeeze an extra clock out of CAS or whatever<br>
> doesn't really help much under the best of conditions and it can<br>
> destabilize a system under suboptimal conditions.<br>
><br>
</div>When you use 4 banks of memory, some boards require slower settings.<br>
Tweaking the voltage may help there I guess, but I would opt for the<br>
slower settings. I recall that my BIOS chose a slower memory setting<br>
when I added 4G to my small server at home that already had 2G.... That<br>
system has been rock stable (except for my Sun quad ethernet that had<br>
problems with the Xen kernel due to MMIO issues. I solved that by<br>
ditching the Sun card and using a vlan capable switch with vlan trunking<br>
so that I no longer need so may ethernet interfaces)<br>
<font color="#888888"><br>
Louis<br>
</font><div><div></div><div class="h5"><br>
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</div></div></blockquote></div><br>have you read your technical product specifications?<br><a href="http://www.intel.com/support/motherboards/desktop/d975xbx2/sb/CS-029346.htm">http://www.intel.com/support/motherboards/desktop/d975xbx2/sb/CS-029346.htm</a> <br>
it states that the supported memory modules are only 2GB top<br><br>Table 4 lists the supported DIMM configurations.<br>Table 4. Supported Memory Configurations<br>DIMM<br>Capacity<br>Configuration<br>(Note 1)<br>SDRAM<br>
Density<br>SDRAM Organization<br>Front-side/Back-side<br>Number of SDRAM<br>Devices (Note 2)<br>128 MB SS 256 Mbit 16 M x 16/empty 4 [5]<br>256 MB SS 256 Mbit 32 M x 8/empty 8 [9]<br>256 MB SS 512 Mbit 32 M x 16/empty 4 [5]<br>
512 MB DS 256 Mbit 32 M x 8/32 M x 8 16 [18]<br>512 MB SS 512 Mbit 64 M x 8/empty 8 [9]<br>512 MB SS 1 Gbit 64 M x 16/empty 4 [5]<br>1024 MB DS 512 Mbit 64 M x 8/64 M x 8 16 [18]<br>1024 MB SS 1 Gbit 128 M x 8/empty 8 [9]<br>
2048 MB DS 1 Gbit 128 M x 8/128 M x 8 16 [18]<br>Notes:<br>1. In the second column, “DS” refers to double-sided memory modules (containing two rows of SDRAM)<br>and “SS” refers to single-sided memory modules (containing one row of SDRAM).<br>
2. In the fifth column, the number in brackets specifies the number of SDRAM devices on an ECC DIMM<br><br> So your 4GB module is not supported... you should use 4x2GB modules in order to see an improvement(always using pairs, remember it's dual channel).<br>
<br>cheers<br><br><br>-- <br>"It is human nature to think wisely and act in an absurd fashion."<br><br>"Todo el desorden del mundo proviene de las profesiones mal o mediocremente servidas"<br>