Originally Posted by bolc
These are max FSB screen to get frequency records, and these frequency are not meant for 24/7 use. My advice to get a performing cpu is to get a X5460 Costa Rica, stepping E0, for which you can get in almost all case, a fsb of 453 for 4.3 Ghz, without too much trouble.
Any of the good chips can be stabilised at 470-480 FS0 (above will become a severe pain for 24/7), at the exception perhaps of X5470 where you will need a "Golden" chip to make the job at 4.7 Ghz... if at all possible to keep stable in summertime...
The voltage given in cpu-z in XP is the Vid actually, and yes my best E5430/40/50 have Vid of 1.1125 V. But for that X5450, it has a Vid of 1.2375
(I have never met a X5450/60/70 with a Vid below 1.2125 V
For E5405: 1.10 V, E5410 at 1.1375 V, but no E5420 with low Vid yet... For X5450/60/70, Vid doesn't mean much, you need to test them, and my best have Vid of 1.2125/1.2375/1.25.
Here you have most of the chips I went through to retrieve the required Vcore for each to be stable ~30-60' under prim95 blend
and as you imagine, I use the best ones currently to bench max FSB. I have just started, next I have the low end, low power cpus to go through, namely E5405-E5420 and L5408-L5420.
My X5460 is doing linx stable for 20 pass at 1,41v 4,3ghz and it's my 24/7 rig now. (now testing stability issues at 458x9,5 1,4250v 4.350mhz). By now, rock solid gaming , browsing , watching films and so on. i managed to pass a big amount of synthetic benchmarks at 4,6ghz 1,48v ish like Cinebench R15 getting 513 points. If i want to post just windows, less voltage , obviously. Just for bench purposes, not 24/7. Vid 1,25v. Tried 4,7 ghz, i can post into windows, but i will not pass Cinebench, which is a very used program to test stability very fast. i think i can post my Xeon at 4.8ghz and enter windows, but that's as far as i can go, almost sure. 4,7ghz with my X5460 is definetely possible and i can probe it.
Considering the max "safe" voltage for this harpertown xeons is 1,45v, going over 4,4ghz will need just to much vcore. an X5470 can be surely viable at 4,6ghz 1,45v ish (also depends on silicon lottery)
so in that screenshot, where it says E5450 it's actually an X5450 right?? 1,2375v Vid is also nice.
Those X5460 in the excel batch are 30-60 minutes in Prime95 at that Vcore??well, almost all of them are better than mine if that's correct. i need almost 1,41v to do 4,3ghz in linx, and i will not pass prime95 blend under any circumstance because one of the cores fails randomly. seems not a cpu related issue. i really don't know why. Any tip about this???
if you could show us more info, like screenshots of mobo, ram speed, and HWmonitor would be really usefull.Edited by Piskeante - 4/28/17 at 6:13am