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.Quote:
Originally Posted by Hoss331
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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.Quote:
Originally Posted by Hoss331
I usually do 8-12 hours depending, I just figured at such a low oc (470X9) it should be able to run prime for at least 24 hours.Quote:
Originally Posted by andressergio
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?
yes agree with you Cliff no way such MCH 1,4 will be good but he is using 2,50A wich is buggy and a hell on the MCHQuote:
Originally Posted by Hoss331
Cheers
Sergio
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).
Under 470 FSB it is very stable for me, however over that it is very buggy. 2.40B is always more stable at higher FSB.Quote:
Originally Posted by andressergio
yes i really dont have a problem just need lots of volts that dont justify for just 50mhz more...but remember that u have the blades...the gskill combo + that 2,50A diver is hardQuote:
Originally Posted by Hoss331
Cheers
Sergio
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
Quote:
Originally Posted by trickson
Asus motherboards are not so great at quad oc ... u need a Gigabyte EP45-UD3R/P for high clocks with low voltage
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 :)
+1000000000000000000000000000000000000000000000000 00000 for thatQuote:
Originally Posted by kagula323
up giga up !!! :D
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
Time to move onto more chips isn't it? :DQuote:
Originally Posted by Jor3lBR
Hope it gets a good home!
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.