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1100T OC help

post #1 of 7
Thread Starter 
Greetings,

I just installed a Rasa RS360 kit on my 1100T and I need some help pushing my chip past 4ghz.

When I had my H70 I was only using the multiplier and I had it stable around 3.8ghz. I never really tried to push it farther although I probably could have because I still had plenty of headroom with temps. I am a semi beginner when it comes to OCing.

I read in another thread these settings which i've implemented and seem to be running stable with several passes of IBT:

FSB 230
CPU Multi 17.5 - 4025ghz
Ram Freq 1533
NB multi x12 = 2760
HT Multi x9 = 2070
CPU-V = 1.45
NB-V = 1.25

If I try to push CPU multi up to get 4.2ghz and increase CPU-Voltage I cant find stability. I tried up to 1.5v and I can get to my desktop but it crashes when I run IBT. I have plenty of headroom temp wise I'm maybe hitting 40C at load @ 4ghz.

Any help is much appreciated I'd like to get this thing stable at 4.2ghz at least.

And if I cant push it further clock wise any suggestions on Northbridge/ other speed tweaks would be great I want to maximize performance.


thanks

- hydro
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post #2 of 7
Thread Starter 
any1?
Hydropwnics
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post #3 of 7
hydro --

I'll reply but I won't be of much help (other than to bump your thread).

I saw your post last night and subscribed, hoping the gain a few pearls of my own. I overclocked my 1100T BE by raising the reference clock and a few system voltages while lowering my RAM speed. I know most people with BE's go straight to the CPU multiplier but from what I've read you achieve better performance by OC'ing the reference clock (or CPU frequency). The only problem was my core temps went over 62c while running IBT at high stress level. That was with a vCore of 1.4250V, pretty safe in most people's opinion.

I started over and raised my multi to x18. At this point I needed to add 50mV to my Vcore to be stable in IBT. I stopped at x18 because I've read CnQ does not function above that multi and I want to keep this feature enabled. I got as far as raising my CPU freq to 223 and adding 25mV to my CPU NB control. BTW, my CPU FB freq is set to Auto (2230 Mhz)...I should probably lower it to x9 or something. Anyway, at these settings I was able to pass IBT at high stress level with a max core temp or 52c...most of the time it was 48-50c on air.

For comparison sake, here is where I'm at with my current settings:

FSB 223
CPU Multi 18.0 - 4014ghz
Ram Freq 1486 (DDR3 1600)
NB multi (Auto) = 2230
HT Multi (Auto) = 2230
CPU-V = 1.375 (1.41 under load with LLC enabled)
NB-V = 1.175

Validation: http://valid.canardpc.com/show_oc.php?id=2061753

Not wanting to hijack your thread but just letting you know that you're not alone! I'll sit back and hope to see you break the 4.2 mark

-- ale
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post #4 of 7
Be sure first of all that you aren't hitting a thermal wall. Remember that with six cores running, temps that look good at idle or even with a light load will spike quickly once a real load is applied.
1.42v's isn't bad and you should break 4.0 no prob anytime you want with it.

Running a higher multi will let you go higher with less bus speed needed BUT higher multi's also work the chip harder at a given MHz = more heat. I've found with my 1100T the best for raw MHz is to run no more than 17x, (With the cooling I have) sometimes even a 16x multi is enough. Your board's ability to OC then comes into play at this point and be sure you have your RAM setup properly too of course.
High CPU-NB speeds will also make the chip run a little hotter so be careful there. Although I can hit 3500+ with the CPU-NB speeds, I have better cooling than you do (Custom H2O setup) so it's not as big of a problem for me to do.
These chips LOVE the cold and will respond accordingly.

Don't try to max out everything at first, take your time and work the chip itself up in MHz, leave your CPU-NB speeds low until you hit the MHz you want from the chip THEN see how much CPU-NB speed it can handle.
I'll also say related to temp spikes even with my setup I start having problems once I go above 1.5v's when trying to boot but if it does boot it will run fine unless I place a real load on it.

The real trick with these CPU's is to make them run as cold as possible, that includes using the least amount of voltage as possible to maintain stability in all cases involving the CPU itself.
Edited by Kryton - 10/24/11 at 9:11am
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post #5 of 7
OP, how many of those settings you posted are stock voltage and frequency/multiplier settings? If none, what are the default settings? It is easiest to start solely with your CPU and work your way up changing between multiplier and voltage until you run into a wall. Changing many settings at once or implementing another person's settings doesn't allow you to discover the true problem quickly once there is instability after a change.
Edited by AL3ZAY - 10/24/11 at 3:09pm
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post #6 of 7
[QUOTE=hydropwnics;15426064]Greetings,

I just installed a Rasa RS360 kit on my 1100T and I need some help pushing my chip past 4ghz.

When I had my H70 I was only using the multiplier and I had it stable around 3.8ghz. I never really tried to push it farther although I probably could have because I still had plenty of headroom with temps. I am a semi beginner when it comes to OCing.


Surely a H70 will get you to 4.1 stable now with proper watercooling you will probably get 4.1-4.3 depending on when your chip hit's it's wall.

Doesn't seem worth it, what was wrong with the H70?

I get 3.8 on a CM V6
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post #7 of 7
OP -

I had the same issue as you, I am at about the max of my core freq I think. I couldnt get past ~4.15 and have any stability, at all. I also cant drop my vcore voltage under 1.525 -- if I do, I will fail IBT tests quick. Right now I can run 100x standard IBT, and 30x very high stress. Also 19hr prime stable.

Kryton is right, use the fsb to overclock -- I have much better luck there. I am using 265 for my base freq right now, and will probably try and push that a bit more to get my cpu/nb higher after I get 24hr prime stable. Take your time, isolate one thing at a time. I've been at it with this chip for about a month now, and I am looking at adding a 480 rad to get my temps lower under load.

If you want to keep your NB where it is, you might give it some more voltage (im assuming that nb-v is what you are giving your cpu/nb?)
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Downfall
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