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Haswell Overclocking Guide [With Statistics] - Page 463

post #4621 of 19539
Quote:
Originally Posted by mfranco702 View Post

Just a quick question, does the power supply quality affects the Overclock results? better quality ensures cleaner and more consistent power delivered to the system, Im wondering if changing to a better certified PSU will give me more room for overclock..... rolleyes.gif

I'm just away to swap out my 860i for a 1200i. If i notice any difference i'll let you know. i do know that with my 780's running full pelt i'm over the point of max efficiency with the 860i.
post #4622 of 19539
Quote:
Originally Posted by Menphisto View Post

Prime95 crash after 15 hrs....noooooooo

Is there any time you will be playing games etc for more than 15hrs solid and using a game that stresses the cpu 100% for all that time? If the answer is no...........












STOP RUNNING PRIME AND GO PLAY SOME GAMES!!!!thumb.gif
post #4623 of 19539
Quote:
Originally Posted by Ali Man View Post

^^ This guy is a champ.


I was looking over the chart and there's a guy (CTM Audi) that has a chip from batch 315B, did he mention the full batch no.?

With Haswell, batch seems to be meaningless. For every "good" batch, there is just as many people with average OCs as there are above average.

Generally though, this applies. But again, not so much for Haswell, especially the low vs high VID stuff because heat will be an issue first (unless you are looking for LN2/extreme cooling).

Quote:
Picking CPUs by batch.

Intel

An Intel "batch" code looks something like this.
3849A015

3 - Plant it was made at, list of plants.

0 = San Jose, Costa Rica
1 = Cavite, Philippines
3 = .............., Costa Rica
6 = Chandler, Arizona
7 = .........., Philippines
8 = Leixlip, Ireland
9 = Penang, Malaysia
L = ............, Malaysia
Q = ..........., Malaysia
R = Manila, Philippines
Y = Leixlip, Ireland

8 - Year (2008)
49 - Week of the year (49th week)
A - Stepping (A less voltage more heat, B more voltage less heat, C too rare to know advantages)
015 - Location on the wafer. Last two digits are important, you want them to be less then 15.


Whats important. Firstly, the date (year and week). Only way to know which are best is by looking for results by others with the same date.
Next look at the stepping. Decide by your cooling. I recomend A batches for good water setups for daily, and since they are generally lower VID then B batches, should be better with extreme cooling. B batches are going to be better for air, or entry water setups. They will also generally draw less power.


AMD

AMD are a little more confusing, since there are so many numbers. One would look like this.

CCBBE CB 1023FPMW
Y460944J00399

CCBBE is is the stepping code.
1023 is the date (2010, 23rd week)
F is the 6th day of the week, rest of the days are,

G = 7th day:
A/R = first day
B/S = second day
C/T = third day
D/U = fourth day
E/V = fifth day
F/W = sixth day
G/X = seventh day

P is the location, MW means multi wafer.

The last three digits of the bottom line is the location on the wafer. The lower the better.


Ok, so when picking an AMD CPU by batch code, you go to pick the best week first, its the most important. For Deneb, 1010 were good and for Thuban 1015 was good. If you find more then one with the same week, then look at the bottom line, last three digits. Go with the smaller number. None of the other still makes much of a difference, that anyone can tell.





Common Mistakes


Low VID vs high VID

A low VID sample is going to be a high leakage chip (good for benching with extreme cooling, high VID is better for daily). VID is determined by TDP. If a CPU has a TDP of 125W, when they are setting the VID, they are setting it so it does not go over the TDP. If the range for a certain CPU is 1.2-1.5, and a CPU is going past the 125W TDP, they will give it a low VID. So a 1.25v CPU would be a low VID CPU, but a high leakage CPU. Now you take that 1.25VID CPU, and set it to 1.4V, it will now be drawing more power then a high VID CPU that started at 1.4V.



So in reality, for a daily system or system cooled by air or water, you DO NOT want a low VID CPU. They are better then high VID CPUs for LN2 or other xtreme cooling though.
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post #4624 of 19539
Quote:
Originally Posted by Darkwizzie View Post

Quote:
Originally Posted by Jodiuh View Post

I hope your wrong. frown.gif


Anybody have a Costa Rica chip that clocks well?


Wdit: How many chips are u basing that off of?
My statistic shows no Costas in the top multipliers. They're just ok.

I checked the spreadsheet and didn't see location listed. Do you have that data?
post #4625 of 19539
Quote:
Originally Posted by Doug2507 View Post

I'm just away to swap out my 860i for a 1200i. If i notice any difference i'll let you know. i do know that with my 780's running full pelt i'm over the point of max efficiency with the 860i.

Wouldn't that be the same in terms of power quality? even though there's more wattage in the 1200i, they both are platinum right? Im talking about a change from 80 plus bronze to gold or platinum.
    
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post #4626 of 19539
Quote:
Originally Posted by blaze2210 View Post

So I realized today that even though my 4.6 OC was stable after hours of Prime95, 20 passes of LinX, and a couple hours of XTU - it could not hold up to 30 mins of Arkham Origins on maxed out settings....So I re-state my previous point: If you're going to be using an OC for gaming, then the best way to test for stability is to game.... thumb.gif

Stability tests is to give us an idea of a potential overclock our rigs can do the real test is the day to day tasks we use the PC for thumb.gif
post #4627 of 19539
Quote:
Originally Posted by blaze2210 View Post

So I realized today that even though my 4.6 OC was stable after hours of Prime95, 20 passes of LinX, and a couple hours of XTU - it could not hold up to 30 mins of Arkham Origins on maxed out settings....So I re-state my previous point: If you're going to be using an OC for gaming, then the best way to test for stability is to game.... thumb.gif

Just out of curiosity, if you have the time (maybe over night), could you do a 9hr XTU run on current settings and see if it passes? It'll help me confirm whether or not the way i've been doing stability testing works or not for 24/7 gaming. If you fail, cool, if you pass i need to look into things! thumb.gif
Edited by Doug2507 - 10/28/13 at 2:30am
post #4628 of 19539
Quote:
Originally Posted by mfranco702 View Post

Wouldn't that be the same in terms of power quality? even though there's more wattage in the 1200i, they both are platinum right? Im talking about a change from 80 plus bronze to gold or platinum.

http://www.tomshardware.co.uk/forum/327742-28-80plus-bronze-silver-gold-platinum

Plenty of info out there.thumb.gif
post #4629 of 19539
1st chip from newegg was a Malaysia, but it would reboot @ stock settings. Replacement chip is a Costa w/ a high last 2 digit batch. So I was expecting crap. Crap is what I got.

4.4 Ghz @ 1.30V, I barely get into windows, prime blue screens instantly (or whatever Windows 8 does).
4.4 Ghz @ 1.35V, I get into Windows and prime has been running for 6 minutes so far.

Highest core is @ 86 C.

So this is fail of the year, right? I lost the lottery, lol! Maybe I'll call Intel tomorrow and tell em their chip sucks, can I has another. thumb.gif

Also, I'm using the onboard GPU, not sure how much that matters.

Oh yeah, Windows 8 is a MAJOR PITA. I had to do a system restore every time it crashed. mad.gif

edit: @ 15 minutes it shot up to 100 C. This is blend mind you. So much for that. Also, my heatsink BARELY feels warm. It feels like there's practically no heat transfer going on.
Edited by Jodiuh - 10/28/13 at 3:41am
post #4630 of 19539
Quote:
Originally Posted by Ponteral View Post

Can you tell what is your Batch number? I really like to buy one of these great peaces... smile.gif

I can't take it anymore. PIECE PIECE PIECE not world PEACE! To add insult to injury I guaruntee you with my LIFE your chip would have done more than 4.4 AND that the guy you are gloating over is either on phase or better, or is most certainly not stable at that speed. Again, on my LIFE. I can validate at 5.3, possibly higher, never gave it much effort because it is stable at MUCH MUCH less.

Haswell is "interesting" to say the very least. I'm gonna venture out on a limb and say the next gen of 1150 chips are gonna be something different altogether. Almost feel like intels guinea pig w haswell.
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