<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div><span>Dear Prof. Blaha</span></div><div><span>Thank
you very much for your professional advice. for optimize system does it matter which operating
system we use or not? for example Debian is better or Ubuntu?</span></div><div><span>Best Regards</span></div><div><span>Ali</span></div><div><br></div> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <font face="Arial" size="2"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> Peter Blaha <pblaha@theochem.tuwien.ac.at><br> <b><span style="font-weight: bold;">To:</span></b> A Mailing list for WIEN2k users <wien@zeus.theochem.tuwien.ac.at> <br> <b><span style="font-weight: bold;">Sent:</span></b> Thursday, June 28, 2012 8:44 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [Wien] AMD or intel CPU<br> </font> </div> <br>
Intel I7 cpus are SIGNIFICANTLY faster than AMD.<br><br>Make sure it is an I7 (not I5,..), because they have the fastest memory access and run best with Lapack/Blas (because of the mkl-library) which is very important.<br><br>At the moment Intel offers:<br><br>i7-3820 300$, 130W, 4 cores, 3.6/3.8GHz, 10MB cache, 4 memory channels<br> and 51.2 GB/s bandwidth<br>i7-3930K 600$, 130W, 6 cores, 3.2/3.8 12 , as above<br><br>i7-3770K 340$, 77W, 4 cores, 3.5/3.9 , 8MB , 2 memory channels<br> !!!! 25.6 GB/s !!!<br><br>So I would go
clearly for a i7-3820 (or if you have more money) for a i7-3930K processor.<br><br>The last one (3770K) is produced in the newest technology (power saving), but I guess its memory bus is much slower!<br><br>Am 27.06.2012 13:53, schrieb ali ghafari:<br>> Dear Profs. Blaha and users<br>> We want to buy new computer for Wien2k calculation. The question is<br>> which kind of platforms (AMD or inlet) are suitable for Wien2k package?<br>> Best Regards<br>> Ali<br>> <br>> <br>> _______________________________________________<br>> Wien mailing list<br>> <a ymailto="mailto:Wien@zeus.theochem.tuwien.ac.at" href="mailto:Wien@zeus.theochem.tuwien.ac.at">Wien@zeus.theochem.tuwien.ac.at</a><br>> http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien<br>> <br><br>-- Peter Blaha<br>Inst.Materials Chemistry<br>TU Vienna<br>Getreidemarkt 9<br>A-1060
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