Hey mates, popped in a X5650 in my old X58 system and started OCing the bad boy. So far so good, but I have one little pondering regarding the C-STATES in general and in particular on the ASUS X58 Sabertooth board. My X5650 has up to 22 multi and 23 with C-states, now I have been reading a lot of OC guides and whatnot suggesting people to enable C states to get access to this x23 multi. Now I am wondering if it is possible to somehow force the x23 multi all the time or of it is simply normal behavior for the cpu to clock back down to x22 multi when more then 1 (possibly 2) core is under stress? Seems a bit odd that the BIOS would allow for a higher multi only on 1 core or under very low load and then clock down to x22 again when doing heavy work. Need some help with this guys, never ever OCed with C-STATES on or any other power-saving feature. On a side not this little CPU seem to be going 4.8 ghz under 1.4V which is really something /Edit Turned off EIST and Intel Speedstep but that doesnt seem to change to behavior of stepping down from the "C-state" x23 multi to the "turbo" x22 multi.
Have you tried settings Windows Power Plan Option to "High Performance" and setting the lower CPU limit to 100% should peg the CPU at its highest clock speed all the time. Then simply select the "Balanced" power plan when not doing anything stressful.
Yup all power saving OS settings are either turned off or turned to highest performance. My problem is more with the BIOS C-STATE, I am unsure of how it works and what I can expect. I want this "C-state" x23 multi to be on 100% of the time, but I don't even know if thats possible(?).
Isint the highest multiplier on the X5XXX xeons ONLY for a single core? As in its how the chip works. Its not visible in the bios for me but I can see it kicking in in windows with CPUZ. If you want the chip to last, Intel's recommended max voltage on these is 1.35v
Yah intels ark pages say 1.35Vcore is recommended, max is 1.4vcore included spikes so yes going above 1.35 is abit hairy for sure. This bastard CPU need 1.416 to do 4.5 ghz. Temps are fine though but yah with everything in mind it is a bit high. After long term use there will be degradation for sure. But then again if you can run 4.5/4.6 for 2 years and then back it down to 4.3 ghz that is not a disaster. Regarding the C-STATE I think ur bang on the money, seem to be a 1 core / 2 thread super turbo that lets 1 core got to a higher multi. I gave up on that and OCing this bugger the traditional x58 way /Edit How many volts do your x5650 need for 4.4 ghz? HT on or off? /edit2 Well I am back to 4.4 ghz now with 1.351 volts I chickened out..temps are too good imo to not go crazy on the voltage though..oo well maybe another day 4.4 ghz and temps are like 46 degrees under 100% load in IBT, my W3520 was roasting at ~90 degrees at that voltage. Then again when I pulled the water block off I noticed the cheapo thermal take ceramic grabage had burned a little, probably all the moist in the paste had dried off and were acting as an insulator instead of a conductor of heat. Back to silver 5 now though.
that's how it works but not completely sure about xeons, some cpus have max turbo for 1 core only and others allow multiple "turbo" speeds, like turbo 3ghz with all cores, 3.2ghz with 2 cores and 3.4ghz with 1 core, depending on how single or multithreaded the task is
Yes that is how it works with the newer CPUs on the 1150, 1151 and 2011 sockets. But the older 1366 and 1156 sockets didn't have those fancy default turbo settings iirc! Oh well I stopped fooling around with the C-states now and went back to regular x58 style brute force with Vcore OCing :banana: /edit Landed at 4.5 ghz now with 1.378 volts so I am happy with that..for the moment
Sorry, wrote my previous response on my tablet hence the drive by info Welcome to the Xeon on X58 club, these bad boys are a fantastic upgrade for the price Im getting rusty on the old Xeon OCing as i had my OC for 14 months( until a few weeks ago ) and just left it with some minor tweaks within the first 2 months. I dropped my OC to 4.2Ghz when i upgraded to Windows 10 due to the odd bluescreen but my conclusion is its Windows 10 as i had 0 blue screens on windows 7 and one within a week on Windows 10. Anyways there are some great threads on hardforum and overclock.net on overclocking these. http://hardforum.com/showthread.php?t=1820772 http://www.overclock.net/t/1461359/...w-discussion-and-xeon-l5639-benchmarks-inside From memory, ignore the ark max, these chips are very very vulnerable over 1.35v, not just in terms of degradation but just bricking the cpu eventually( check those links, plenty of examples ). Regarding my own OC, its busted lol, i removed it recently( long story involving trying to recover a harddrive and SSD from my media rig and wanting to eliminate all potential issues ), that was a few weeks ago and i got a steam link so just been playing console type games in my other living room over link and those didnt need much cpu performance. Im starting my OC again, i recovered one of my old configs off my harddrive, but im working off conservative settings before reducing them to lower temps, so i just set the max safe vcore to 1.35 and reduced uncore( ill let you know what its at but its stupidly safe for the moment ). Just ran 40 mins with Prime95 blend @ 4.2Ghz @ 70C which is good enough to save the profile and up the ante. I do remember some of my old settings, they were 1.315vcore for 4.4Ghz with 66C max temps in prime95 Blend test, i cant remember the individual ones though, and i always leave HT on( not worth turning it off for the odd game thats better with it off ), I also keep all the C states active as I have my rig idling a lot so saving on juice Honestly on the X5650 and max OC potential, i think safe is 4.4Ghz and silicon lottery lucky if you get above that without much hassle. For going 4.7Ghz or similar i think a safer bet is a 5675 or similar, the higher multiplier places less of a strain on the system and theyre not expensive thinking of buying one to play around with tbh.
I though xeons being enterprise efficient would do that or something different at least oh well I'm pretty sure you will get bored and try going a few MHz higher over time
Checked the links now and one of the threads on hardforum had some nice info and discussions innit. A lot of people are talking about 1.45Vcore though and 1.35V max on qpi (above 1.35V on vtt/qpi seems to kill the chips or degrade them fast). I have heard 1.45V also on other sites, as something people are not afraid to run through their 32 nm westmeres. At I am doing 4.4 ghz @ 1.375 volts with 1.275 QPI. My temps are really good though, this thing idles without power-saving/speedstep or c states, at 24-27 degrees. With maximum amount of RAM loaded in IBT and with 6 threads (100% cpu load) I see 47-50 degrees on the cores as max. The difference between this cpu and my 45 nm W3520 is extremely large. The W3520 idled at close to 50 degrees and loaded it ran like around 85 degrees. This was with same h2o loop, 480 rad in push pull combo. Big difference there. I am leaning towards raising Vcore and going for 4.7 ghz...but I am not sure..I am quite sure I could reach 4.5 ghz at 1.4 or so volts and be stable in IBT. Maybe 1.43 volts for 4.7 ghz.. my Sabertooth does 220ish bclk so it would be doable for sure. Ooooh..I don't know - seems to be a lot of contradictory information floating around on the regular OC forums. Some swear by the 1.35Vcore as max some say 1.4Vcore as that was the old maximum stated by Intel on the ark pages. Some say the Vdroop spike has a maximum of 1.4V..and some claim 1.45V is "fine" .. Guess maybe I should be content with 4.4 for the mo and then when programs/apps actually want more then 4.4 ghz for good minimum fps I will run the cpu in a kamikaze state until it degrades and then upgrade the whole sys..
I'm pretty sure I read every page of those threads and there's a least 2 people that bricked theirs @1.45v However they're so cheap could just buy another as backup especially if you can hit 220blk, mine becomes unstable above 200. Very nice temps BTW, my previous OC had it maxing at 66C with a h100i. Game performance wise I get very little difference between 4.2 and 4.4Ghz
