Undervolted e5200 how high will she OC ???

[Kenmitch]

As I had some good results with this chip pushing her above 4ghz until I ran into the thermal limit for my cooler I decided to go the other way and find a stable lowered voltage OC instead.

My starting point in bios is 1.025(lowest e5200 will go) which equates to about 1.008 when loaded in CPU-Z

Lets just say I was kinda surprised she would even post at such a low voltage

Test I'll make
1) Post
2) Load Windows Vista
3)Intel Burn Test....I know some of you hate this one
4)OCCT small data set for 1hr

After I find the sweet spot then I'll do some more extensive testing....Overnight Prime95 longer OCCT etc,

UPDATED FROM HERE DOWN

My initial starting point has passed test 1,2,3,4 and I'm bumping her up 2.91ghz

Second point has passed test 1,2,3,4 with a voltage bump of .0125 3.06 ghz

With vcore reading in bios of 1.108 it looks like she's at her limit now 3.33ghz in cpu-z loaded vcore drops to 1.072 under load....Guess not to bad at all compared to the earlier threads on the e5200 OC that I could find.

3.33ghz (333x10) is stable and all she'll do around 1.108 as read in BIOS

-----------------------------------------------------------------------------------------------------------------

Heres the updated data from 2.00ghz and up

Bios vcore is not what it was set to but what it shows the vcore is after rebooting with the settings. Temps are from the Intel Burn Test as it pumps the heat up more. Both of my cores pretty much stay at the same readings with little fluctuation from one to the other.

2.00ghz (333x6) bios vcore .884 OCCT vcore .86 Temps 35*c idle 37* loaded
2.33ghz (333x7) bios vcore .900 OCCT vcore .88 Temps 35*c idle 38* loaded
2.66ghz (333x8) bios vcore .948 OCCT vcore .93 Temps 35*c idle 42* loaded

3.00ghz (333x9) bios vcore 1.028 OCCT vcore 1.01 Temps 35*c idle 44* loaded
3.33ghz (333x10) bios vcore 1.108 OCCT vcore 1.07 Temps 35*c idle 50* loaded
3.66ghz (333x11) bios vcore 1.188 OCCT vcore 1.15 Temps 35*c idle 60* loaded
4.00ghz (333x12) bios vcore 1.300 OCCT vcore 1.27 Temps 35*c idle 72* loaded

4.16ghz (333x12.5) bios vcore 1.348 OCCT vcore 1.31 Temps 38*c idle 84* loaded


Thanks,
Ken

 

[imported_Scoop]

I don't get this 'max overclock while undervolting' thing. Either you overclock OR undervolt. It's like what's the best car you can buy for $30,000 but you can only use $25,000. Wut?

 

[Zensal]

No, it's like whats the fastest car I can buy that gets 25 mpg. Overclocking while undervolting reduces power consumption/heat while increasing performance. Nothing wrong with that.

 

[Lemon law]

I agree with your approach Kenmitch, but as I started to do what you are saying, not only does the multiplier of 6x ramp up to 12.5 under load, the vcore also seemed to ramp up from a low voltage under stock the 1.12 setting to 1.174 under load. But I was doing my light overclocking using easy tune and you may be doing it in the bios, and hence may get different results.

But even then, preliminary results seemed to imply that undervolting the chip .07 volts knocked 4-5 C off of load temperatures.

 

[alyarb]

my q9550 will do 3.70 ghz at 1.20. that's 870 MHz with a .05 volt reduction. before that i had an e6300 at 1.125 that did 2.90 ghz.

i think at 1.0 volts you should be good for at least 3.0 ghz. probably 3.20.

 

[Kenmitch]

The first attempt that passed was 233x12.5 2.91ghz @vcore of 1.01 in OCCT
Load temps of around 42*C on both cores.

I expanded the poll a couple of notches as I may have underestimated the chip

I'll see if I can make the next step tonight

 

[Kenmitch]

I'm unable to edit my above post on my iPhone

These are the bios settings for 2.91ghz
233x12.5 vcore 1.050=1.028 in bios = 1.008 CPU-Z loaded
This may already be the sweet spot as mem = 932mhz @5-6-6-18
I should be able to tighten it up as it is rated at 1066 with those settings.

I'm thinking my goal will be whatever OC works out with the highest and
tightest mem settings will be the winner

 

[Shmee]

I'd go for 3.2 about, assuming your chip is better than my buddy faxon's! We tried to get it higher than 3.2, but it needed like 1.35 vcore just for that...

you may need to up vcore just a tad bit more though, I would shoot for highest OC @ under 1.25 V. Thats just me, as 1.25 is still pretty low vcore.

 

[Kenmitch]

" I'd go for 3.2 about, assuming your chip is better than my buddy faxon's! We tried to get it higher than 3.2, but it needed like 1.35 vcore just for that...

you may need to up vcore just a tad bit more though, I would shoot for highest OC @ under 1.25 V. Thats just me, as 1.25 is still pretty low vcore. "

As this will probably wind up being a websurfing and email machine for the old lady I'm going to just get the best bang for buck
lowest vcore OC I can get under vcore of 1.100

The chip is stable at 4.16ghz @ vcore 1.38 but I don't want to purchase a supercooler to keep the heat down

 

[Kenmitch]

Guess not bad for such a low vcore

 

[Idontcare]

Originally posted by: Kenmitch
Guess not bad for such a low vcore

Not bad at all :beer:

If you've the time or inclination it would be cool to see something like this for your particular processor.

 

[Kenmitch]

Originally posted by: Idontcare

Originally posted by: Kenmitch
Guess not bad for such a low vcore

Not bad at all :beer:

If you've the time or inclination it would be cool to see something like this for your particular processor.

A chart would be cool....What would one use to make it tho? Any freeware available?

I thought I'd try the jump from 1066 FSB to 1333 FSB today without a voltage bump to see if she is stable....So far so good.

Currently testing at (333x10)

If she's stable I'll see if I could maybe get her a little higher without a voltage bump

The wall on my chip seems to be 343 as nothing higher will even post

Thanks,
Ken

 

[Lemon law]

To Kenmitch who in the opening post said, "My starting point in bios is 1.025(lowest e5200 will go)"

And by that, I assume you are referring to your board's bios.

Because, I seem to recall from intel spec's, they list a vcore as .96 volts as the minimum for an e5200.

It would be interesting to see what a vore of .96 volts would do for speed and how low the e5200 could go on volts.

I have a similar board and an revision M e5200, and am really watching this thread. And I may just try to get close to 3 ghz at 1.08 volts or below. As long as I can keep cpu load temps below 55 C and a get stable overclock, and you are demonstrating that it may be easily attainable.

 

[Kenmitch]

Originally posted by: Lemon law
To Kenmitch who in the opening post said, "My starting point in bios is 1.025(lowest e5200 will go)"

And by that, I assume you are referring to your board's bios.

Because, I seem to recall from intel spec's, they list a vcore as .96 volts as the minimum for an e5200.

It would be interesting to see what a vore of .96 volts would do for speed and how low the e5200 could go on volts.

I have a similar board and an revision M e5200, and am really watching this thread. And I may just try to get close to 3 ghz at 1.08 volts or below. As long as I can keep cpu load temps below 55 C and a get stable overclock, and you are demonstrating that it may be easily attainable.

Dont believe everything you read on the web

I'm petty sure I read that the e5200 wouldn't let you set it under 1.025.....Wrong

I decided to bump up to 333x10 and keep the same voltage settings....Yep she's stable still

Once on the 1333 FSB I decided to drop multiplier down to 6 and start over....She will go down lower and this post will be updated with all the results in a couple of hours. The results are looking pretty good so far!

 

[Kenmitch]

Heres the updated data from 2.00ghz and up

Bios vcore is not what it was set to but what it shows the vcore is after rebooting with the settings. Temps are from the Intel Burn Test as it pumps the heat up more. Both of my cores pretty much stay at the same readings with little fluctuation from one to the other.

2.00ghz (333x6) bios vcore .884 OCCT vcore .86 Temps 35*c idle 37* loaded
2.33ghz (333x7) bios vcore .900 OCCT vcore .88 Temps 35*c idle 38* loaded
2.66ghz (333x8) bios vcore .948 OCCT vcore .93 Temps 35*c idle 42* loaded

3.00ghz (333x9) bios vcore 1.028 OCCT vcore 1.01 Temps 35*c idle 44* loaded
3.33ghz (333x10) bios vcore 1.108 OCCT vcore 1.07 Temps 35*c idle 50* loaded
3.66ghz (333x11) bios vcore 1.188 OCCT vcore 1.15 Temps 35*c idle 60* loaded
4.00ghz (333x12) bios vcore 1.300 OCCT vcore 1.27 Temps 35*c idle 72* loaded

4.16ghz (333x12.5) bios vcore 1.348 OCCT vcore 1.31 Temps 38*c idle 84* loaded

That was fun

 

[faxon]

Originally posted by: Shmee
I'd go for 3.2 about, assuming your chip is better than my buddy faxon's! We tried to get it higher than 3.2, but it needed like 1.35 vcore just for that...

you may need to up vcore just a tad bit more though, I would shoot for highest OC @ under 1.25 V. Thats just me, as 1.25 is still pretty low vcore.

3.3 @ 1.392v CPU-z (1.42v bios). pathetic, i know. my Q9650 is happily pwning its face @ 4.2ghz with 1.376v CPU-z lol. i was able to get it to 3.6GHz @ 1.25v stock lol

 

[Kenmitch]

I forgot I still had this one running prime

Guess I'll keep her at 3.33ghz (333x10) bios vcore 1.108 OCCT vcore 1.07 Temps 35*c idle 50* loaded

27 hrs of prime torture test should be good enough to call stable....I slam'd Intel Burn Test on top of prime at max avaiable memmory for 5 times at 5 runs each time to make sure. Pretty much killed all available resources. Along with my many runs of OCCT before this last run of PAIN

Thanks,
Ken