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[Official] - Xeon X5660-X58 Review & Discussion [and Xeon L5639 benchmarks inside] - Page 518

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post #5171 of 7923
Quote:
Originally Posted by kizwan View Post

designed to operate = stock. VID is not minimum and maximum voltage for overclock. The absolute maximum voltage which usually can be found in datasheet (see superj1977's post above) is the max voltage you can use ]without damaging the CPU.

The difference between VID & Vcore is the VID is the value the CPU requested while Vcore is the actual voltage supplied to the CPU. The one you set in BIOS/XTU is Vcore.


The data sheet isn't there to satisfy the overclocker. It does not express the minimum and maximum voltages the chip is DESIGNED TO OPERATE at. OPERATE
Edited by OCmember - 9/25/15 at 1:55pm
     
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post #5172 of 7923
The max Vcore=1.4V from intel

bot I have search some information, which tells that the max Vcore=1.45V

like this thread

http://hardforum.com/showthread.php?t=1820772&highlight=45

So I am just very confused about this.

Thank you.
post #5173 of 7923
Thread Starter 
Man I wish people would just stop spreading false information. I've typed up my thoughts on the info here:

http://www.overclock-and-game.com/hardware/computer-tech-news/30-westmere-ep-x58-overclock-information

Check out page two. I address the horrible information that spread around the net overclockers. For all of those datasheets for a second. Who cares. Intel decides how their chips will operate and what they will tolerate. Time and time again I see people saying 1.4v or 1.45 is the max. I need to update my post with more info, but I've been busy.

Long story short:

Max Vcore [in BIOS!] = 1.35v [depends on the CPU - could be 1.36v\1.37v] Anything over 1.35v for most CPUs will increase heat and degrade quicker baby. Especially if it's 24/7 + constant voltage.

CPU PLL = 1.8v. Leave it alone. CPU PLL kills CPUs quicker than the Vcore. Yes you can push it all the way to 2.50v, but why would you even want to get close to 2.0v.

PCIe Frequency = Leave it alone @ 100Mhz. Some fools push it well above 105Mhz which will eventually lead to problems over time or worse....dead SSDs\HDDs and \or data loss. You can also destroy components on the MB as well. Good luck to those who change it. Best Bet = AUTO.

QPI\Vtt voltage: You want this well below 1.4v. Overclockers can push it well above 1.5v, but you are asking for death. Ideally you'll want to shoot below 1.3v. It can keep heat down as well.

IOH Voltage: You'll want this below 1.18v. No higher than 1.3v. Ideally as I said you'll want it at or below 1.18v. Best bet = AUTO.
IOH PCIE Voltage: Below 1.60v. Damage can occur above 1.68v. Best bet = AUTO.

ICH Voltage: You'll want this below1.20v if possible. Going above 1.30v - 1.35v is pushing it. Best bet = AUTO.
ICH PCIE Voltage: You'll want this below1.60v if possible. Best bet = AUTO.

DRAM Voltage: 1.65v or below. Some users go slightly over for stability at higher overclocks. If you are not paying attention your RAM can get extremely hot with poor ventilation or DRAM poor heat sinks. Should be with 0.5v of the uncore for sure if you are going above 1.65v IIRC.

Of course overclockers are free to do what they want to do and destroy anything they want. It's your gaming rig\workstation and your money. I'm sick of people quoting Intel and taking their words and charts out of context to justify "something". Some people want to feel good about damaging their CPUs. That doesn't give people the right to claim false info.

Quote:
Originally Posted by superj1977 View Post

Xeon 5600 Vol 1 Datasheet

Page 31,
2.5 Table 2-7
&
2.6 Table 2-8
Warning: Spoiler! (Click to show)

Just stop reading the PDF smh. People take it completely out of context.

Quote:
Originally Posted by superj1977 View Post

Max vcore as recommended by Intel For Xeon 56XX CPU is more than VID range of 1.35v by 0.5v @1.4v.

You will need to read Vol 1 Datasheet to see the electrical spec thumb.gif
Same for all Intel, VID is not max Vcore but would not be a bad thing to accept VID as max vcore tongue.gif

What the heck are you talking about. The max vCore is 1.35v period. The spike comes afterwards, but you never know when.

Once again go here and read.

http://www.overclock-and-game.com/hardware/computer-tech-news/30-westmere-ep-x58-overclock-information

Go to page two . You don't have to take my word or anything, but I work closely with Intel from time to time and they have no problems answering any of my questions. Luckily I never really have questions since I already understand their tech overall. Sometimes to satisfy people it's better to come from the horses mouth than mines from time to time. So you are wrong my friend. The max is 1.35v. You can play the word games with voltage and VID as long as you want.

@OCmember is spot on. We had this discussions before in this topic so it's not a new discussion.
Edited by Kana-Maru - 10/9/15 at 3:34am
    
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post #5174 of 7923
So

briefly speaking, just do not let Vcore over 1.35V.

rigtht ?
post #5175 of 7923
Quote:
Originally Posted by jjps50912 View Post

So

briefly speaking, just do not let Vcore over 1.35V.

rigtht ?

Yes that's right.
post #5176 of 7923
Thread Starter 
Quote:
Originally Posted by jjps50912 View Post

So

briefly speaking, just do not let Vcore over 1.35V.

rigtht ?

Correct.

However, you shouldn't run 1.35v constantly for 24/7 use due to high voltage and heat issues. If you do run 1.35v 24/7 at least you know you won't be violating Intel's guidelines. Personally I'd want less than 1.27v for 24/7 use. At the moment I'm running 1.18v and 1.20v @ 3.8Ghz - 4Ghz 24/7 use. 100% max load never goes above 55c. If it's cool temps never rise above 55c. That's with 22c ambient temp.

Edit:
Just in case anyone is wondering my Gflops @ 3.8Ghz is roughly 80Gflops
Edited by Kana-Maru - 9/25/15 at 6:38pm
    
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post #5177 of 7923
Hi everyone!

How important is qpi clock ratio? Is it ok to leave it on auto?
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post #5178 of 7923
Thread Starter 
Auto is fine if everything is working properly.
    
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post #5179 of 7923
Quote:
Originally Posted by Kana-Maru View Post

Auto is fine if everything is working properly.

Awesome, thanks Kana-Maru!
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post #5180 of 7923
Got one more question for you Kana-Maru, what is your QPI/VTT while sitting at 3.8 ghz, is it higher than your vcore? Just trying to figure out how far they are from eachother.
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