Thats funny you mention the vtt under volting, I was looking at ET6 and noticed that my vtt read 1.30. I will change that and give it another try.
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10 hours (i.e. enough for a complete loop of all FFT sizes in blend) is enough for me.
Still having a fair bit of trouble around the 480k/20k test area (around 4-5 hours into blend), with either hangs or rounding errors. I'm testing at 489x9/1.37v with memory at 1223 on 2.50a divider. It seems to like 1.28vtt the most, any lower and the board gets stuck at POST after a reboot, any higher, and blend fails sooner. MCH is at 1.54v and Tread is 8. Vdimm is set to 2.220v, although both do just as well with less. Have tried various voltages skews & ref changes, but still can't get through a complete error-free loop at this speed. CPU temps dont go beyond 65°C so I'm starting to suspect the board, but if anyone can offer any hints I'm all ears!
You shouldnt need anywhere near that kind of mch voltage for that oc, more likely the 1.40 area. Have you tried running it using 2.40B instead of 2.50A?
I remember you having problems with 2.50A thats why I asked if hes tried using 2.40B instead. For one reason or other my board has no issues with 2.50A nor does it seem to need alot of extra voltage, 1.40mch for 4.5/1250. 2.40B on the other hand has always had issues with how much mch voltage it can handle at a given fsb before it will bsod or just not boot. Where your able to run 1.46+mch for 500x9 I cant go over 1.40 on 2.40B without have problems, 1.42 is kinda usable but 1.44+ will crash instantly or not boot at all. Theres a narrow usable window on how much mch voltage is needed to be stable yet not crash from having to much voltage and this scales with fsb, as it increases so can mch as it deceases so must mch or it becomes unstable. This is using the red slots, if I use the yellows the max usable mch voltage drops by about 0.02-0.04 (to about 1.36-38 at 500fsb).
Yea it might just be a compatibility issue with the gskills as my cellshocks also dont have any problems with 2.50A. :shrug:
Thanks for the helpful responses. I wasn't aware of the 'limits' you've experienced when bumping vMCH at certain speeds. I've not experienced these myself, but assumed 2.50A with PL8 would require more volts. I'm now testing at 1.4v, but with memory in yellow slots so I'll get back to you all. I'lll take the info on board about the mch voltages, but these odd voltage limitations some of you appear to suffer don't seem like an issue with me, but then again my n/b is watercooled which may/may not make the difference. Perhaps it's a rev1.6 thing?
I'm hoping to finally have my EP45 extreme tomorrow, and I've got a few more days off to see what it can do. If it does any better, this will end up being my 24/7 board.
I've been toying with an E7500 (11x multi) for the past day, no records broken but it certainly could take the voltage. I managed 4.95GHz with 1.88v on H2O, but was only benchable at <4.7GHz/1.8v. Temps never went beyond 65°C and coolant didn't even get warm, but I got a bit scared after that. I thought any higher without anything cooler could just fry the chip, particluarly as most others were benching with ss/dice etc with those volts. I'll get thoose pic up on hwbot soon, only worth a couple of points though, if that!
My problem with mch and 2.40B are probably just an issue with my particular board, you may very well not have an issue with it or 2.50A. My nb is also water cooled and when I was still benching with 2.40B on the cold nights it would get even more sensitive to mch voltage. Do you know if the extreme has been moded yet? It has no LLC and apparently the vdroop is pretty substantial in unmoded form.
In-Fluence Do you really get 4.2GHz with that voltage ? and just how ? Man mine needs so much juice it at funny .
1.4 Volts For 4.2GHz . Man would be great to get them lower .
http://img94.imageshack.us/img94/1131/newocv.jpg
Some chips will just clock better than others mate, and as your chip had a VID of 1.25. I would say that's 0.05v higher than mine so the difference in voltage makes sense. FYI the Asus MIIF actually got all the way up to 4.3GHz and it acheived that with lower volts than my UD3P, probably because of the finer GTL tuning options. It's a shame because that all I reckon it needed were 50ps steps in the CPU/NB skews and 500fsb may have been attainable.
Anyhoo, my EP45-Extreme is here at last - not happy about the seller leaving the giant coper heatsink rattling around inside the package with the board, but there's only a couple of scuffs and hopefully there'll be no damage to the components. Will no doubt post back with results later :)
Been tinkering with the board today, finally getting stableish at the same volts, unfortunately this board vdroops like nothing I've seen before (like you mentioned Hoss), so I'm popping down to maplin 1st thing tomorrow for a 5k pot. I'm looking at .1v droop from idle to full P95 load! This means I've had to set ~1.52v in bios to try for any stability attempts at 500x9 - idle temps were acceptable, but still uncomfortable for 24/7. Memory overvolts by about .04v too, but runs nicely at 1200/2.03v :D Hopefully, with the mod, I can begin to finalise my seemingly endless quest for a 4.5ghz/1200MHz rig and setlle down to using it!
*edit - link to my post re: vmod and results ;)
http://www.xtremesystems.org/forums/...postcount=6183
Hey everyone.. I was here last week still wishing I could get this ep45.. but I now might be ready to join the 4.5 GHz club. Lol
Fry's electronics I found a open box EP45-UD3P for $79 just missing the I/O shield. I'm seriously thinking about getting it. Thoughts? I no longer have SLI . My GTX 480 will be here tomorrow.
I have a good early batch 1.2500 vid Q9650 doing 4.2 with a nf200 board stuck at 1.35 fsb/vtt voltage and using way more than 1.304v for 4.0 ghz like sig says. It boots with that. But needs much more for stability.. I think I could get much higher with the ud3p. Now might be my chance.
Does anyone know how well my RAM will run in this board? I have a 2x2GB OCZ Blade 1066 MHz kit I could try instead. They are NOT LV tho.
Should I snag this board?
I would certainly do it. I had one setup a while back with a 9650 and it was much better then any board to that date for 775 and I have tried them all. Fantastic results with much higher stable fsb clocks for both the 9650 and 9550.
It'll take your quad a fair bit further and possibly with lower volts (and your vcore is not that bad at the moment). UD3P boards are the best you can get for o/cing them, I'd go for it if I were you, they're becoming very hard to get now. If you're willing to fork out a bit more cash, the usb3 version might be up your street and more easily available to the US.
My EP45 Extreme is finally holding my CPU stable at 4.5GHz but it needs a bump in vcore (i.e. 1.475 in bios / 1.45 real). The vdroop mod has really paid off and now it seems to have done better than my UD3P, but this large bump in vcore required to get stable has also knocked temps into the high 70's during a few hours of small ffts - now looking to try and lower it a notch or two and getting a rad better suited to my low-noise fans.
http://i194.photobucket.com/albums/z...Q965045GHz.jpg
Hey guys just a heads up that my golden Q9650 is up for sale:
http://www.xtremesystems.org/forums/...d.php?t=249851
http://img683.imageshack.us/img683/9292/3580too.th.jpg...http://img508.imageshack.us/img508/4335/jor3lbr1.th.jpg...http://img31.imageshack.us/img31/124/jor3lbr2.th.jpg1
Jor3lBR,man i cant believe it.wish i still had me UD3P
well i have my own Q9550 that can do 4.25 on 1.264 volts but Seriously if i had the money and didnt had a Q9550 i Surely bought it its a verry nice cpu lets hope it comes into good hands :)
It should be fun to use Jor3's chip, don't expect the same clocks he got though.
It will indeed take quite a push to get it back to those record speeds. good luck with it.
having a small problem with getting my setup stable again
I just replaced a broken Rosewill 950w with a Corsair HX750 (I wanted the HX850, but my local microcenter didn't have any in stock) I am constantly getting freezes in Prime 95 blend. I have no stability at any of my other profiles as well.
Also I replaced my lapped TRUE for a Venomous X, but I hardly doubt that would affect any related to my overclock. The 12V rail seems rock solid at 12.3, the 3.3V rail is at 3.25, and the 5V is at 5.1 under full prime 95 blend load.
Any idea's?
What part of prime blend is failing, large FFTs I assume? Curious you should mention you got a hx750 as I lost a little stability on my old Q6600 about a year back when I changed over to my hx850. Although the PSU runs nice & cool, I'm starting to get suspicious now :s
MCH reference along with VTT and MCH voltages are probably the cause mate, I wouldn't give up just yet. The aforementioned are crucial to stability on this board, and could result in a bootable, but not 'stressable' system. You might even find that your old PSU required the board to give higher voltages, and you might need to compensate/re-tune.
List your settings and perhaps we can offer some more suggestions ;)
A quick bench session http://valid.canardpc.com/show_oc.php?id=1151229
I switched from a HX1000 to a HX850 and I'm still stable with the same bios settings, so it was prolly something else in your case (unless you got a faulty unit ofcourse). My 5870 actually clocked slightly higher at the same volts AFAIK. Not scientificly tested though. Never did a before/after test, but it felt that way. Might have been a placebo too :p: Overall I'm still happy with my HX850 though
NoGuru,amazing OC.i always thought jor's chip was in a different league
than the rest of ours.cant wait to see some more of your results:up:by the look's
of it,the chip is in great hands.im glad you got it,at least you'll push it to it's max
awesome.WCing is the way to go with a gem like that.
yea i was confused by what to get but it's not really that hard to figure
out just waht you need.i asked members here for advice and people like
zsamz and andressergio,helped me out quite a bit.so feel free to
ask questions
Finally got around to doing so more dice testing and got a new best for spi 1m. I was planning on doing a max speed run also but didnt get around to it, hopefully tomorrow night.
http://i131.photobucket.com/albums/p...1/921Image.png
bravo Hoss331
:clap::clap:
Hoss331,thats some awesome quadcore fsb action for sure.i couldnt even get my last two
UD3P's to do fsb above 550 using a dualcore.simply put,WOW
Hoss, great score. What ram are you using?
A 5Ghz+ SPI run, Very nicely done Hoss!
I've persuaded an old friend to ship me a USB3 board now which will be my last 775 board for certain. I'm not hoping for more success in benching, I just love the colours they've used and know it'll look great in my case. Keep pushing hoss, how's your max CPUz coming along? :D
*edit scratch that - just seen it 5.1+GHz - go Hoss!
Thanks :up:
I cant complain its my original P board and it still puts up the FSB numbers, hopefully my ddr3 board will also when it gets its chance.
The ram is radajas old PC8000 C4 Cellshocks (D9s).
I actually had a 8.907 run done at 5.103 but it locked on me just before I could click save in paint. :( I was low on ice so Ill get it next go around and try for a new max validation, with the way its running im thinking a 5.2 is within reach. :yepp:
The dreaded lock up before the save. I have faith you will get it next time.
After reading through many of the posts on this thread I realized that I wasn't just dreaming on getting my Q9650 above 3.6GHz...I previously had it running on an MSI P43-Neo3F, but nothing I did would let me go above 3.7. After reading many of the posts here, I knew I should be able to get more out of it and I became convinced that I was being limited by the low native bus speeds of my board and DRAM (PC2-8500)
After a quick trick to the local Fry's, I picked up a Gigabyte EP45T-USB3P and some brand new DDR3, with the push of a button I was up to 3.8GHz, and with a little extra on the CPU voltage I run 4.05GHz with almost no effort. This PROC is AWSOME!
I'm now Prime95 stable at 3.8 for daily use with ocassional desired to see it at 4.05GHz - hav'n't completley stabilized the 4GHz setting yet as I get a spontaneous reboot when running Prime but generally very happy with this chip - thanks all for your various posts and input that convinced me that under the right environment my chip was capable of much more than I was getting.
I am having a problem with my USB3P, I can't set the command rate to anything but 2T. Every time I try to change it, in windows it is always 2T.
I even tried using Memset to change it and it will not allow me to change it as well. The option is available in the drop box but when I choose it, it still comes up as 2T.
I have tried looking for a beta bios or any other bios other than F1 to try, because it seems the memory dividers are botched on this board, only 3.20B works for me.
i know on intel chipsets with ddr2 1t is not allowed,but i just checked through the UD3P thread
and still cant find any ddr3 boards using the 1t.all their SS show 2t.but i will keep looking for you
EDIT:
according to 3oh6 his board had the option but wouldnt run 1t either.
P45 and DDR3??