3700+ @ 2.7ghz Oc'ing Cant get further

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07-01-2006, 08:14 AM
mikael999

1 Attachment(s)

3700+ @ 2.7ghz Oc'ing Cant get further

Hi

I have ran in to a wall while oc'ing my Sandy 3700+.
I am running it on a DFI lanparty ultra-D (with DFI's newest bios) With 2*1gb kingston value ram
And a Zalman 7000b-alcu cooler

Its is Rock stable at 2700Mhz at following settings:
Its is runing a Pi 1m at 33 sec

vcore: 1.550
Vmem: 2.7
V Ldt: 1.3
V Chipset: 1.50
And ram divider 133 (so that i am sure that it is not the RAm that is setting the limit)
And HTT at 4x

At 2750 it gets slightly unstable, resets sometimes.

What can it be. I have seen several sandys getting near 2900 on air.
Maybe another bios or a Modded bios ?

at 2790 mhz superpi fails and posts the message: Not convergent in SQR?

A pic of max superPi 1m is attached:

Thnx for the help ;)
07-01-2006, 08:27 AM
Schmetterling

First of all set the HTT Multiplier to 3x. My Ultra-D doesn't like to do x4 > ~255Mhz try to stay under 1000 :) Also, what stepping do you have?

Here is my 3700+ @ air:

http://img187.imageshack.us/my.php?i...titled9ff1.jpg

- Schmetterling
07-01-2006, 08:49 AM
mikael999

Quote:

Originally Posted by Schmetterling

First of all set the HTT Multiplier to 3x. My Ultra-D doesn't like to do x4 > ~255Mhz try to stay under 1000 :) Also, what stepping do you have?

Here is my 3700+ @ air:

http://img187.imageshack.us/img187/8...led9ff1.th.jpg

- Schmetterling

Ok. i will try to set it to 3x

Is there another way to see stepping other than take the cooler off the cpu ?? (lazy me :P)
07-01-2006, 08:59 AM
Schmetterling

Quote:

Originally Posted by mikael999

Ok. i will try to set it to 3x

Is there another way to see stepping other than take the cooler off the cpu ?? (lazy me :P)

No lol :P

- Schmetterling
07-01-2006, 09:00 AM
mikael999

Ok. I will wrtie here again when i have looked for the stepping
07-01-2006, 09:06 AM
mikael999

I have set the HTT to 3x
At 2780 it comes sometimes comes with the Message: Not exact in round. Or the meassage: not convergent in SQR ?
The ram is running 150 mhz at 2T 2.5:5.2.8
07-01-2006, 09:09 AM
Schmetterling

What's the deal with NV Monitor showing 1.4v vCore and cpuz 1.5v? If you can figure out the stepping we might be able to predict whether its the cpu or sth else :)

- Schmetterling
07-01-2006, 09:20 AM
sofarfrome

what Tref value are you using? I have found this setting can have positive impact on getting more from certain types of memory (especially UCCC). I see you have value ram so perhaps it will help that too.
07-01-2006, 10:07 AM
mikael999

Quote:

Originally Posted by Schmetterling

What's the deal with NV Monitor showing 1.4v vCore and cpuz 1.5v? If you can figure out the stepping we might be able to predict whether its the cpu or sth else :)

- Schmetterling

Ok.
Here is what is written on the cpu:

ADA3700DKA5CF
CCBWE 0548XPMW
1383446L 50144

Quote:

Originally Posted by Solarfrome

what Tref value are you using? I have found this setting can have positive impact on getting more from certain types of memory (especially UCCC). I see you have value ram so perhaps it will help that too.

In a64 tweaker it says
Refresh rate (Tref): 133 MHz 3.9us

Thnx for the help so far ;)
07-01-2006, 10:08 AM
RPGWiZaRD

hmm... 2.7GHz 1.55v at least that's better than my POS SD3700+ that I'm running 2695MHz @ 1.65v and 15 - 20mins prime stable. Will swap it out for a Manchester ASAP tho. It's the same for me when reaching 2.62 - 2.65GHz or so, it won't go much further at all after that. Mine's an early E4 tho with a crappy stepping CABHE 0520 VPAW I got thx to the stock ran out JUST as I hit the order button, and it's the last E4 ones that were good not the earliest ones.
07-01-2006, 10:11 AM
SIOUX

Quote:

Originally Posted by mikael999

Ok.
Here is what is written on the cpu:

ADA3700DKA5CF
CCBWE 0548XPMW
1383446L 50144

In a64 tweaker it says
Refresh rate (Tref): 133 MHz 3.9us

Thnx for the help so far ;)

Thats a rev E6 stepping, and sorry to say, but dont usely clock as good as the E4. I think its the max of the CPU:(
07-01-2006, 10:19 AM
ChkDsk

In the first screenshot your "idle" temp is 51°C... You can forget overclocking any further then.
07-01-2006, 10:22 AM
mikael999

Quote:

Originally Posted by ChkDsk

In the first screenshot your "idle" temp is 51°C... You can forget overclocking any further then.

The first screen isnt idle. idle is around 45 or so.

on the screen i just came out of a hour or so of playing FEAR and ran that 1m test.
07-01-2006, 10:25 AM
sofarfrome

Enter bios and set your divider to 133. Set Tref to 2336 (166MHz, 1.95us) or 2064 (133MHz, 1.95us) or 1816 (100MHz, 1.95us).

These Tref values have helped me push just a little more out of my UCCC.

But the CPU stepping you have may well be your biggest barrier.
07-01-2006, 10:48 AM
ChkDsk

Still, I think your temp is limiting... Around 50°C these CPU's crap out on stability...
07-01-2006, 11:58 AM
mikael999

3 Attachment(s)

Some pictures from bios:
07-01-2006, 12:31 PM
lross78550

its phase time...
this should help.. and no its not my ebay listing

http://cgi.ebay.com/nVentiv-Prometei...QQcmdZViewItem

lee
07-01-2006, 12:56 PM
sofarfrome

one more suggestion...set your idle cycle limit to 0
07-01-2006, 01:28 PM
mikael999

nothing seems to help :/

What about a modded bios ?
07-01-2006, 02:18 PM
Brettbeck

Quote:

Originally Posted by SIOUX

Thats a rev E6 stepping, and sorry to say, but dont usely clock as good as the E4. I think its the max of the CPU:(

Do you know what KABGE chips are like for overclocking?

Thanks in advance
Brett
07-01-2006, 10:58 PM
Schmetterling

Google knows it :) (I believe about 2.6Ghz)

- Schmetterling
07-02-2006, 12:12 AM
RPGWiZaRD

I'd say stay away from any CABGE and CABHE, they are known bad clockers, 2.6 - 2.75GHz or so.
07-02-2006, 06:50 AM
turbotoaster

maybe if doesnt clock very well, because it is a failed dual core, thats why it wont clock like the sandies
07-02-2006, 09:26 AM
aintz

like everybody else said dont except you cpu to be like the other peoples. it might be the max it can go and its already pretty good speed so just stop trying to squeeze more
07-02-2006, 03:48 PM
learners permit

Agreed that speed is not that bad for the stepping.
07-03-2006, 03:46 AM
mikael999

Ok.

good. now i have started to mess with my RAM and timnings bur what is best. tight timnings or high ram speed.
Since i have value ram they cant go 1/1 with the fsb
Right now i am using 133 mhz divider and the ram is running 171 mhz at these timnings:
2,5:2.2.5
super pi time is 32.374 sec.

should i set the divider to the 5/6 and use loose timnings instead?
07-03-2006, 04:35 AM
roadie

The chip you have, like mine is a failed dual core chip that has been labelled a 3700+. It's actually a Toledo core, hence the E6 stepping. Mine is a 0542VPMW, which according to the previous owner did 3.2Ghz under a MachII at 1.65V.

However, I am not even attempting to OC the chip at the moment because of the high ambient temperatures (it's 30 degrees plus in London at the moment) that are causing high CPU temps. During web browsing last night, my chip was at almost 50 degrees!

What you need to do is keep your RAM as close to 200Mhz as you can using the dividers and run tight timings because you are using value RAM.
07-03-2006, 05:08 AM
aop

I had a E6 revision 3700+ (tray) last week and it didn't even go 2,6GHz at 1,55V with Zalman CNPS7700-Cu. It just wasn't prime stable. I returned it and ordered a E4 revision boxed version of 3700+. It should arrive tomorrow.
07-03-2006, 05:20 AM
Schmetterling

Quote:

Originally Posted by roadie

What you need to do is keep your RAM as close to 200Mhz as you can using the dividers and run tight timings because you are using value RAM.

There's some types of value ram which will run along pretty nice. My old G.Skill for example did 254Mhz @ 2.5-4-3-6 and if i knew what I know now about tweaking ram I could have gotten 260Mhz out of them as well I think.

- Schmetterling
07-03-2006, 05:29 AM
ChkDsk

No progression yet? I think (like knowing for sure) your temps are holding you back... No matter what you'll try, if your chip reaches >50°C the chance of getting errors is big. That, plus the known overclocks of this stepping makes it just the max overclock at the moment.

Do you really need 1.55V for 2.6GHz btw? Whats the best primestable speed you achieved (at which VCore)
07-03-2006, 05:30 AM
mikael999

Quote:

Originally Posted by roadie

The chip you have, like mine is a failed dual core chip that has been labelled a 3700+. It's actually a Toledo core, hence the E6 stepping. Mine is a 0542VPMW, which according to the previous owner did 3.2Ghz under a MachII at 1.65V.

However, I am not even attempting to OC the chip at the moment because of the high ambient temperatures (it's 30 degrees plus in London at the moment) that are causing high CPU temps. During web browsing last night, my chip was at almost 50 degrees!

What you need to do is keep your RAM as close to 200Mhz as you can using the dividers and run tight timings because you are using value RAM.

Ok.
It is allso pretty high ambient temps here ind Denmark allso around the 30+ degrees.. So that allso why i think that my temps are high.

Quote:

Originally Posted by Schmetterling

There's some types of value ram which will run along pretty nice. My old G.Skill for example did 254Mhz @ 2.5-4-3-6 and if i knew what I know now about tweaking ram I could have gotten 260Mhz out of them as well I think.
- Schmetterling

Ok. so you say that i should try to run higher than 200 mhz. 226 mhz if i use 166 divider and tweaking the ram to as tight timnings a possible ?
Or even lower the multi and go for even faster ram speeds but still at as tight timnings as possible ??
07-03-2006, 05:37 AM
mikael999

Quote:

Originally Posted by ChkDsk

No progression yet? I think (like knowing for sure) your temps are holding you back... No matter what you'll try, if your chip reaches >50°C the chance of getting errors is big. That, plus the known overclocks of this stepping makes it just the max overclock at the moment.

Do you really need 1.55V for 2.6GHz btw? Whats the best primestable speed you achieved (at which VCore)

No no.
2750mhz at 1.500 vcore it is superpi 32m stable. and that is what i call stable.
I do not set high requirements for stability (such ad prime stable for 20 hours or so) as long as i can play my favorite games for about 10 to 12 hours, i am happy.
I have a litle better temps now. Now the load temp is at max 52 degrees. I have set my zalman cooler directly to the motherboard instead of the small fan control box. But now it makes ALOT of noise. fans running at MAX all the time. Sounds like a Jet engine :P