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I think whether i7 could speed up you task is depend on the demand
of bandwidth of the task, because the bandwidth is enhanced in the
i7 CPUs and related mother board chips. If your task require
extremely large bandwidth of RAM, which is beyond your old hardware
platform could give, your task could be speed up by i7 CPUs in this
case. If you task only have a small demand of bandwidth of RAM, and
there is no obvious communication jam between CPUs and RAM in your
old hardware, you task might more depends on the frequency of CPUs.<br>
<br>
By the way how did you connect your 8 CPUs? by ether net or
infiniband? The network might be another cause of the inefficient
speed up. And I think i7 is a CUP for PC. For servers which
performing large calculations you should choose XEON 5600 series or
AMD 6100.<br>
<br>
hope helps. <br>
<br>
vega<br>
<br>
On 2010-08-05 00:22, nand wrote:
<blockquote cite="mid:246514.41047.qm@web65810.mail.ac4.yahoo.com"
type="cite">
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<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt;">Dear PW Users,<br>
To speed up my DFT calculations and for larger requirement of
RAM i am using a system with an Intel core i7 processor and
CentOS-5.3 as my operating system (OS). I would like to know if
these two go well hand in hand or there is some other OS that
can make better use of Intel core i7 processor. The isntallation
of Quantum Espresso 4.2.1 was done sucessfully and is running
well. However I find its not as fast as i could have expected.
Does this have to do something with the installation process. Is
there something to do with optimising the 8 CPUs that is seen
listed in my hardware list.<br>
Thanks a Million<br>
Nand Rana<br>
Research scholar,<br>
Ranchi University.<br>
India<br>
<br>
<br>
</div>
<br>
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<div class="moz-signature">-- <br>
<p><font color="black">
================================================<br>
Vega Lew ( weijia liu)<br>
Graduate student<br>
State Key Laboratory of Materials-oriented Chemical
Engineering<br>
Nanjing University of Technology, 210009, Nanjing, China<br>
***************************************************************<br>
Email: <a class="moz-txt-link-abbreviated" href="mailto:vegalew@gmail.com">vegalew@gmail.com</a><br>
Office: Room A705, Technical Innovation Building,<br>
Xinmofan Road 5#, Nanjing, China<br>
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