Overclocking the UD5 with 12gb of ram.
- Thread starter JonJ678
- Start date
Soldato
Soldato
-TB-, how much Vcore does CPUZ report when you leave it on Auto in the BIOS and have the chip @ 4.2GHz?
When I first began overclocking this system I have atm, I tried leaving Vcore on Auto, and set Bclk to 150MHz with turbo off, and when I checked CPUZ, Vcore was right up to 1.35v, but when I set it manually, my chip can do 3GHz with only 1.18v.
I imagine that it must set Vcore quite high for 4.2GHz?
Sorry for taking your thread off topic Jon!!
When I first began overclocking this system I have atm, I tried leaving Vcore on Auto, and set Bclk to 150MHz with turbo off, and when I checked CPUZ, Vcore was right up to 1.35v, but when I set it manually, my chip can do 3GHz with only 1.18v.
I imagine that it must set Vcore quite high for 4.2GHz?
Sorry for taking your thread off topic Jon!!
Soldato
Its showing 1.375 in CPUZ in Windws - I need to spend some tiome reigning that back it "auto" almost always over volts. Im sure around high 1.2s to 1.3 should be achievable.
IIRC anything under 1.4 is fine ?
IIRC anything under 1.4 is fine ?
Soldato
Yep, under 1.4v is fine mate.
You will be able to get that lower, would imagine you will get it between 1.275 and 1.35v
You will be able to get that lower, would imagine you will get it between 1.275 and 1.35v
Took the thing apart to move fans around, and in an interesting twist, it's now refusing to post at 150 bsck and has deleted all my bios profiles. Going back to stock for round 2. Odd.
edit: appears my pump wasn't running, tubing too kinked I think. Bios profiles still gone but otherwise it's sort of behaving itself. Need to get a flow meter of some sort.
edit: appears my pump wasn't running, tubing too kinked I think. Bios profiles still gone but otherwise it's sort of behaving itself. Need to get a flow meter of some sort.
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Soldato
Managed this on "Auto", but far from stable 
My first blue screen!
"A clock interrupt was not received on a secondary processor"
Internet seems to think this is vista being ****, which doesn't really help me. Oh, or that the processor isn't stable. Needless to say I'm enraged that "processor isn't stable" seems to be considered a complete answer. Not sure what to do about this. Installing drivers and rebooting, otherwise will try to get stability from clock drive and pll.
@TB I wonder what qpi voltage auto is setting
"A clock interrupt was not received on a secondary processor"
Internet seems to think this is vista being ****, which doesn't really help me. Oh, or that the processor isn't stable. Needless to say I'm enraged that "processor isn't stable" seems to be considered a complete answer. Not sure what to do about this. Installing drivers and rebooting, otherwise will try to get stability from clock drive and pll.
@TB I wonder what qpi voltage auto is setting
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Soldato
Generally that BSOD message indicates not enough vcore for the chip, had it often in testing both my Q9650 and i7 920 clocks and on both chips it was vcore related
Interesting, cheers Paul. It appears to have gone away with installing drivers, though I'm now seeing a different one. Told windows to stop rebooting so I'll be able to google it properly next time it shows up.
Throwing vcore at it doesn't appear to make it any more stable, I think the important thing to get now is the correct balance of qpi and vdimm, and hope this isn't a function of vcore.
Throwing vcore at it doesn't appear to make it any more stable, I think the important thing to get now is the correct balance of qpi and vdimm, and hope this isn't a function of vcore.
Soldato
Good luck
To be honest i only ever needed to increase vDimm past 1.66v when it would lose RAM on boot, for me that was around 1.3825v vtt which a nudge of vcore would resolve
To be honest i only ever needed to increase vDimm past 1.66v when it would lose RAM on boot, for me that was around 1.3825v vtt which a nudge of vcore would resolve
Something seems to be working, I'm 11 passes into ibt at 4.4ghz. Really hoping this turns out to be stable, there's some voltages I'd like to lower.
Still, for the first time in a few days I'm feeling confident about this working out well. 4.4ghz with 12gb is not a bad effort at all
Still, for the first time in a few days I'm feeling confident about this working out well. 4.4ghz with 12gb is not a bad effort at all
Soldato
4.4GHz with 12GB is a nice result Jon.
Is this with or without Turbo?
Is this with or without Turbo?
It's with turbo on (boo 
). And yeah, I will probably try to repeat this with turbo off. At present I can't work out how to get over 210 bsck stable, I'll probably try turning turbo off and increasing bsck on the current settings in the near future.
There's still many, many voltages for me to play with yet so there's still hope for a true 4.4ghz. So much still to learn. Might be playing with ram next though, and that's probably an even bigger minefield than the cpu.
Apparently 5 hours of ibt means **** all. Multitude of crashes, some more visually interesting than others. Basically it can't cope with heavy processing load combined with multitasking, which is unfortunately what it spends most of its time doing. Down to 210x20 and solid so far, got a fair bit of work to do for a few days so will revive this thread and try to finish off 4.4ghz when I have time.
Damn.
). And yeah, I will probably try to repeat this with turbo off. At present I can't work out how to get over 210 bsck stable, I'll probably try turning turbo off and increasing bsck on the current settings in the near future. There's still many, many voltages for me to play with yet so there's still hope for a true 4.4ghz. So much still to learn. Might be playing with ram next though, and that's probably an even bigger minefield than the cpu.
Apparently 5 hours of ibt means **** all. Multitude of crashes, some more visually interesting than others. Basically it can't cope with heavy processing load combined with multitasking, which is unfortunately what it spends most of its time doing. Down to 210x20 and solid so far, got a fair bit of work to do for a few days so will revive this thread and try to finish off 4.4ghz when I have time.
Damn.
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Soldato
Jon my settings for 4.4 were not 24/7 friendly.
Vcore 1.35
Vtt 1.3
and this one which i wasn't happy about RAM voltage 1.75 (id left it on auto)
i had multiplier set to 21 and BLK 210
let me know if you want anymore settings
Vcore 1.35
Vtt 1.3
and this one which i wasn't happy about RAM voltage 1.75 (id left it on auto)
i had multiplier set to 21 and BLK 210
let me know if you want anymore settings
Soldato
Amount of times I was stable under IBT even with Max memory used but PC would lock up/freeze under Prime blend test or in relation to Jons post heavy multi-tasking is one of the reasons it annoys me so many people say you only need IBT to be stable!!
Have you got any further since Jon?
Have you got any further since Jon?
Associate
In exactly the same situation here mate, IBT and Prime stable @ 4.2 but once every few days the system will freeze opening something as stupid as a new tab in Firefoxx ;( Very annoying!
Cheers guys.
I'm currently at 200x20, 1.3V vcore, 1.3V qpi, turbo off, 1200mhz ram. This is far from the result I want, but as ibt has proven inadequate I'm trying days of real use and folding as a stability test. I think it's doing ok, the plan is to leave it completely alone for a week or so (running f@h) and see how it copes. I'll just attach the monitor to my laptop.
I think the freezing is related to the memory controller deciding enough is enough. I'm basing this on more qpi voltage generally helping, and on crashes/freezing mainly happening when a lot of data is swapped into or out of the ram. Starting virtual machines kills it fairly consistently for example.
Current belief is that ibt + prime plus a good week of normal use is needed to consider it stable. This is then reconsidered if it ever shows signs of instability that can't be put down to software. Oh well, I didn't expect to make it over 4ghz very quickly. Next thing to do (after the weeks testing) is to see what my ver 3.2 dominator can do and give PaulyD a shout.
Good luck guys
It ran folding@home for a week without any issues. Earnt me considerable numbers of points in that time, so I think it's probably time to try for more than 4.000 again.
I'm currently at 200x20, 1.3V vcore, 1.3V qpi, turbo off, 1200mhz ram. This is far from the result I want, but as ibt has proven inadequate I'm trying days of real use and folding as a stability test. I think it's doing ok, the plan is to leave it completely alone for a week or so (running f@h) and see how it copes. I'll just attach the monitor to my laptop.
I think the freezing is related to the memory controller deciding enough is enough. I'm basing this on more qpi voltage generally helping, and on crashes/freezing mainly happening when a lot of data is swapped into or out of the ram. Starting virtual machines kills it fairly consistently for example.
Current belief is that ibt + prime plus a good week of normal use is needed to consider it stable. This is then reconsidered if it ever shows signs of instability that can't be put down to software. Oh well, I didn't expect to make it over 4ghz very quickly. Next thing to do (after the weeks testing) is to see what my ver 3.2 dominator can do and give PaulyD a shout.
Good luck guys
It ran folding@home for a week without any issues. Earnt me considerable numbers of points in that time, so I think it's probably time to try for more than 4.000 again.
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Associate
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I've got a 920 D0 running with 2x Corsair XMS3 6GB C8 kits (i.e. 12GB total) on a UD5, cooled with a Corsair H50.
Initially I overclocked it to 4GHz, with the same settings as you have - 200x20 with Turbo off, 1.3V Vcore (in BIOS - actual load Vcore was 1.26V), RAM at 12000MHz/1.65V.
It ran Prime95 for 24 hours without trouble, and I did a few runs of LinX too without trouble so decided it was stable and began Folding on it (-bigadv SMP client via a virtual machine). This was OK at first, until a day or two into it I walked in and discovered an "Irrecoverable hardware error" BSOD. I've backed off to 3.6GHz (base clock 180MHz, all other settings the same) and have been running like this for probably at least a week now, so 3.6 seems to be fine. Load temps are typically 75c (core 0) ranging down to 65c (core 3).
Posting here to share my experiences. Just wondering what I need to do to get it running stable at 4.0GHz.