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Discussion Starter #1
Looking to create a list of SB overclocks with their respective voltages.

Please state what sort of stress testing you've done at each clock rate.

(Thanks)

Examples:

Mine

i5-2500k 4.2GHz 1.28v Prime sfft 1 hour

i5-2500k 5.0GGhz 1.48v Prime sffft 1 hour Prime blend 1 hour Folding @ Home 7 1/2 hours

Board: Gigabyte UD4 LLC on

sandybridgemshzlist.jpg

Image by Lutro0

https://spreadsheets.google.com/pub?key=0AqhwVC9Lw4S5dDRuRklnc0RZa0RRZmthTUFidHRjc2c&w=75h=500]SB Spreadsheet[/URL]

i7-2600k

Name Speed Voltage Batch Board

reflex99 5.40GHz1.49vL040B208P67A-GD55

tconroy1355.00GHz1.37v

Not a Good Idea5.00GHz1.38vL040B208P67A-UD7

cmeeks 5.00GHz1.39vL040B208P67A-UD5

gonX 5.00GHz1.47vL040B165ASUS P8P67 Pro

Agavehound4.80GHz1.32vL040B208ASUS P8P67 Pro

LJC 4.80GHz1.34vL040B165ASUS P8P67 Pro

kcuestag4.80GHz1.35v ASUS P8P67

rmp459 4.80GHz1.395vL040B705ASUS P8P67 Deluxe

ugotd8 4.80GHz1.40vL040B208BIOstar TP67XE

Sedyn 4.80GHz1.40vL040B255ASUS P8P67 Deluxe

cmeeks 4.80GHz1.42vL040B208P67A-UD5

nmanley 4.74GHz1.40vL040B705ASUS P8P67 Pro

Sedyn 4.73GHz1.365vL040B225ASUS P8P67 Deluxe

TheDream4.70GHz1.32vASUS P8P67 Deluxe

cmeeks 4.60GHz1.30vL040B208P67A-UD5

Sedyn 4.60GHz1.31vL040B225ASUS P8P67 Deluxe

aleiro 4.60GHz1.34vL041B741P67A-UD7

jackbrennan2008 4.60GHz1.26vP67A-UD7

gooddog4.50GHz1.30vASUS P8P67 Pro

soldierblue4.50GHz1.32vL040B705P67A-UD4

PaulWog4.70GHz1.42vL040B243P67A-UD4

DayoftheGreek4.70GHz1.37L040B705Asus P8P67 Pro

techheadtrevor5.02GHz1.424vL040B225Asus P8P67 Pro

rickss69 5.30GHz1.53vL042B215ASUS P8P67 WS Revolution

i5-2500k

Name Speed Voltage Batch Board

ehpexs 5.3GHz1.48vL041B789ASUS P8P67

hamster3null5.00Ghz1.42vL040B671P67A-UD3

ckybam35.00Ghz1.495vL041B800ASUS P8P67 Pro

BallaTheFeared5.00GHz 1.50vL041B522P67A-UD4

TriBeCa 4.80GHz 1.416vL040B672ASUS P8P67-M PRO

compudaze4.8GHz1.390vGigabyte P67A-UD3

Capwn 4.80GHz1.40vL040B671Biostar TP67XE

Aytaç 4.74GHz1.42vP67A-UD4

cory12344.70GHz1.31vASUS P8P67 Pro

hamster3null4.70GHz1.35vL040B671P67A-UD3

i_hax 4.60GHz1.28vL041B527P67A-UD3

SovereigN74.60GHz1.30vASUS P8P67 Pro

Armastitium4.60GHz1.35vL040B671ASUS P8P67 PRO

Duguganu4.60GHz1.38vASUS P6T

IzorkX 4.50GHz1.28vASUS P8P67 Deluxe

hamster3null4.50Ghz1.26vL040B671P67A-UD3

Pauliesss4.50GHz1.30vAsus P8P67 Pro

Armastitium4.50GHz1.32vL040B671ASUS P8P67 PRO

CKtalon 4.60GHz1.28vL42B291Asus P8P67 Pro

Trew 4.20GHz 1.20vMSI P67-C43
 

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i5-2500k 4.5ghz 1.29 V PRime 2 hours or so

Also, whatever happened to the warning that sandy bridge volts should be between 1.325 and 1.38 (somewhere there)? Also, whats the recommended PLL voltage? I have mine at auto for now with asus p8p67 pro.
 

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Discussion Starter #3
From what I've seen I'd caution you that your reported voltage and the actual voltage may be two different things.

It seems ASUS boards are reporting voltage lower than other boards. Every person with an ASUS board - including yourself now has reported voltage far lower than what everyone else seems to be getting at the same clocks.

Please bare in mind that this doesn't mean it is, just something I have observed.
 

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should also add if HT is on or off...

4.8g HT off. 1.34. Prime95 3hrs, IBT: 20 runs
4.5g HT on. 1.3 Same

I haven't tried to optimize, I just wanted to see what I could get below 1.35 with HT on and off.
 

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Quote:
Originally Posted by SovereigN7;12012484
i5-2500k 4.5ghz 1.29 V PRime 2 hours or so

Also, whatever happened to the warning that sandy bridge volts should be between 1.325 and 1.38 (somewhere there)? Also, whats the recommended PLL voltage? I have mine at auto for now with asus p8p67 pro.
I'm getting about the exact same. 1.29v under load. I'm debating on whether or not I should use extreme LLC. I heard it can degrade your chip?

4.6ghz, 1.296v, 50 Linx stable, and going on 2 hours of Prime95 as I type. I set my PLL to 1.85v. I've read you need 1.9 for 4.7ghz+ but I haven't pushed my chip that far yet. I also have all power saving features enabled.

http://www.overclock.net/intel-cpus/751860-intel-k-club-discussion.html

I have a chart already set up so everyone can compare instantly.

2n74abs.jpg
 

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Quote:
Originally Posted by cory1234;12012803
I'm getting about the exact same. 1.29v under load. I'm debating on whether or not I should use extreme LLC. I heard it can degrade your chip?

4.6ghz, 1.296v, 50 Linx stable, and going on 2 hours of Prime95 as I type. I set my PLL to 1.85v. I've read you need 1.9 for 4.7ghz+ but I haven't pushed my chip that far yet. I also have all power saving features enabled.
I have it set to extreme as I was following the newegg youtube guide from an asus rep. It seems cpu z does report a lower voltage from bios as I get 1.288 on load, 4.5 ghz.
 

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Quote:
Originally Posted by SovereigN7;12013008
I have it set to extreme as I was following the newegg youtube guide from an asus rep. It seems cpu z does report a lower voltage from bios as I get 1.288 on load, 4.5 ghz.
Prime95 just failed after an hour and a half. Bumped it up to 1.31v. I never did full stability testing at 4.5ghz, but I passed 20 linx runs @ 1.25v (load).
 

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Quote:
Originally Posted by BallaTheFeared;12013226
Cory your voltage was at 1.34v in your previous screen shot...
Cpu-Z is more accurate. The Vcore drops under load because I only have LLC on medium for now. If I set it to extreme it doesn't change under load. It makes more sense to state the voltage under load since a higher idle voltage seems pointless?

Does anyone know if LLC degrades these chips?
 

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Quote:


Originally Posted by cory1234
View Post

Prime95 just failed after an hour and a half. Bumped it up to 1.31v. I never did full stability testing at 4.5ghz, but I passed 20 linx runs @ 1.25v (load).

Haha damn mine just failed too after I came back; an reboot happened which I assume a bsod occured (too low for a 4.5 I guess). I bumped it up to 1.31, cpu-z 1.56.2 reading 1.304 as of prime95 in blend testing.

You might want to add another 0.005 or two for a 4.6 to get a stable oc and than find the perfect low vcore by lowering it 0.005 a time.

Anyone know if these rams can be oc'ed at all?

EDIT: down to 1.30v from 1.31v with same 4.5ghz
 

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Quote:


Originally Posted by gooddog
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should also add if HT is on or off...

4.8g HT off. 1.34. Prime95 3hrs, IBT: 20 runs
4.5g HT on. 1.3 Same

I haven't tried to optimize, I just wanted to see what I could get below 1.35 with HT on and off.

if you are going to off HT why do you buy 2600k ?
 

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Discussion Starter #16
Quote:
Originally Posted by Digigami;12013495
Here.. easiest way is to just post my ppd/watt spreadsheet from my 2600k build; contains my voltage settings for 4 different speeds, gives you an idea how much more power it will pull once you OC also.

2600K PPD/Watt

*cough* Balla are you going to post your ppd numbers in my database? Pretty please?
wink.gif
My ppd is terrible, like 16k on my i5-2500k and 17k on my gtx 470.
 

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Discussion Starter #18
Ahhh yes, I had a run in with ASUS LLC back on my AMD chips.

I remember being able to do 4.1GHz on a 965 with 1.2v whereas everyone else needed 1.45 or more.

I'd be careful if I was on an ASUS board - they report power voltage but temps and stability don't reflect the actual voltage being used.
 

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1.47v during load, 1.45v in BIOS. 4.9 GHz HT on.
Still tweaking, done Prime95 for 5 minutes, but no crashes yet.
 

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Discussion Starter #20
Here we go I found it: Notice my voltage, and my temps...

855fdea3.jpg


It was a rather large thread here on OCN trying to figure out why I was .1v or more below what everyone else needed.

It turns out it was because of LLC on the ASUS board, it would boot at lower voltage and report said lower voltage, but the actual voltage was far higher in Windows despite it not being reported as such.

It was all quite embarrassing to me to be honest.

Here is the thread: http://www.overclock.net/amd-cpus/826676-4017-mhz-oced-ph-ii-965-a.html

As I said it turned out to be an LLC issue, and the actual voltage needed with less LLC was around 1.46 I believe with the exact same temps.
 
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