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With Sandy Bridge You want D1 Stepping, not the weaker D2 for ocing. - Page 8

post #71 of 89
1/9/11 at 4:54am
Quote:
Originally Posted by AzO View Post
Ok, let me get this straight as I'm about to build a sandy bridge for a client.

1) Why did Intel release Sandy Bridge with two different stepping (D1, D2) on launch?

2) Why couldn't Intel release all Sandy Bridges with D1 stepping in the first place?

3) Last but not least, the chips with the "K" moniker have unlocked multipliers and the ones without the K are not overclockable? Did I get it right?
From what I can gather, D1 chips are ES (engineering sample) chips. They are made with a different process, but still able to be sold to the public. They tend to be better, but not very available. D2 will be the predominant stepping at launch. D1 chips were not made to be mass produced at the same level, hence why they are not all D1 chips. I may be off on this, but that is what I can gather.

You can do some minor overclocking with non K chips, but it won't be much. The K chips unlock the multiplier, which is where the vast majority of overclocking will happen with SB. Any changes to the base clock with create system wide instability since everything runs off that base clock. I have seen people up it from 100 to around 103, and some claiming about 105. Yet that is not much overall (105 x multiplier vs. 100 x multiplier). You can also do a slight bump within turbo. Yet if you want to really overclock, you want a K chip.
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post #72 of 89
1/9/11 at 3:20pm
so which is the better stepping then d1 or d2?

Im going to ask a retailer to try and hand pick one for me tomorrow!
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post #73 of 89
1/9/11 at 3:59pm
Quote:
Originally Posted by rchads89 View Post
so which is the better stepping then d1 or d2?

Im going to ask a retailer to try and hand pick one for me tomorrow!
D2 can hit 5Ghz, they released a PLL voltage fix through a bios update. AFAIK, D1's are ES's and can only be bought from eBay. Last 2600K D1 I saw on eBay was bought for $360. But so far I have not yet seen a retail D1 posted anywhere.
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post #74 of 89
1/9/11 at 6:54pm
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Originally Posted by anoob View Post
D2 can hit 5Ghz, they released a PLL voltage fix through a bios update. AFAIK, D1's are ES's and can only be bought from eBay. Last 2600K D1 I saw on eBay was bought for $360. But so far I have not yet seen a retail D1 posted anywhere.
This.

I seem to remember that voltage fix improve over clocking. Those that hit 5Ghz prior, were able to hit 5.2-.3Ghz with the same vcore.
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post #75 of 89
1/9/11 at 8:33pm
Quote:
Originally Posted by PanicProne View Post
Just to be on the safe side, I will not go over 1.4v.

That should still ensure at least 4.6ghz on a 2600k.

Which is a GREAT OC anyway you spin it. More than enough to be faster than practically anything out there.
You can get over 4.8ghz on less than 1.4v

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post #76 of 89
1/9/11 at 8:40pm
Ok Maybe I can clear some things up

#1 you cannot buy a D1 stepping 2600K unless you buy it off someone.
#2 all retail are d2 stepping
#3 all those 5.5gh SB OCes are all on D2s
#4 CPu PLL Unlock allows the D2 stepping processor to oc further than without this option. It was made available a week or two ago.
#5 I haven't seen one D1 processor do over 5.2-5.2ghz.
lol:
[ame]http://www.youtube.com/watch?v=EFFgO7xTIoY&feature=player_embedded[/ame]
Edited by Sin0822 - 4/29/12 at 2:15pm
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post #77 of 89
1/9/11 at 9:39pm
Quote:
Originally Posted by Sin0822 View Post
Ok Maybe I can clear some things up

#1 you cannot buy a D1 stepping 2600K unless you buy it off someone.
#2 all retail are d2 stepping
#3 all those 5.5gh SB OCes are all on D2s
#4 CPu PLL Unlock allows the D2 stepping processor to oc further than without this option. It was made available a week or two ago.
#5 I haven't seen one D1 processor do over 5.2-5.2ghz.

#6 all of those tests for that article were done with ASUS boards, I bet it might have been different with Gigabyte or even Intel boards., For instance you have to have C1E and EIST and TUrbo enabled on ASUS, and they have had a TON of problems with the M4E and BIOS and OC. People start making generalizations about C1E and EIST and TUrbo having to be on for no reason, only ASUS boards have problems like that. Heck on Most boards yes you have to OC with TUrbo, ONLY GIGABYTE will let you OC without Turbo.

ASUS Marketing USA, I mean a prick named Gary Key, flooded the review websites with his crappy mobos: You should watch this video here with his ***** ass getting tought a lesson by his old employer Anand, which I have no taste for either, but he sure does get him scratching his head a few times. Gary key is a prick, and even went into my review over at XS and tried to discredit me. It was because I totally ripped apart digital PWM design for Sandy Bridge, and what do you know I was right, in the end ASUS cannot get VRD 12 certification, and their SVID isn't as responsive as other boards.
As a guy curious as to what motherboard to buy with a 2500k, what would be the gigabyte(or any other brand) equivalent of the p8p67 (/pro)?

Also will throw the question that I've seen jumped around in here... Using a Hyper 212+, what speeds can I expect to reach with the average 2500k? I've seen reports ranging from under 4.5ghz to over 5ghz...
Edited by uKnighted - 1/9/11 at 9:43pm
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post #78 of 89
1/9/11 at 9:42pm
P67A-UD4 or UD5, but the UD5 just has more features and is more expensive because of it and its 20 phase VRM. I would just go with the UD4.
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post #79 of 89
1/9/11 at 9:47pm
There's been a couple of reports of Sandybridge processors (overclocked ones) dieing over at the OcUK forums... not sure whether it deserves its own thread or not.

http://forums.overclockers.co.uk/sho...php?t=18227516
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post #80 of 89
1/9/11 at 9:50pm
Well for those of you who read my OC guide, I did see electron migration occurring at over 1.5vv. The voltage needed to get to 5.2ghz increased and increased, to the point I said no go and took it down to 5.1ghz to do my benchmarks.

I could feel that she was slipping away, and i saved her.

Thanks for the post
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