i5-2500K/2600K batch number and o/c results

[PiLsY]

From the looks of it your chip is behaving very much like my own. In that case you should be able to go down to 1.365 then work your way down. But once again I'm not sure what exactly did it, the CPU PLL overvotalge OFF or the actual CPU PLL voltage (can anyone explain how the two are related?).

Try 1.365, but boost the CPU PLL to 1.63125...because my prime failed after 45min...I'm still working things out, Im trying more cpu pll to see if that caused the crash before I give it a tad more vcore, I would like to stay at 1.34.

My 2500k is the same - its cpu pll overvoltage it doesnt like. I need 1.8cpu pll for 100bclk, 1.92cpu pll for 105.5bclk. vccsa stock 0.925v. Takes 1.58v for 5.2ghz, 1.52v for 5ghz and 1.45v for 4.8ghz. 49x max multi. Using cpu pll overvolt gets me up to 53x but its never stable in prime or gaming. Linx and superpi are fine, 3dmark 50/50.

[newhit]

My 2500k is the same - its cpu pll overvoltage it doesnt like. I need 1.8cpu pll for 100bclk, 1.92cpu pll for 105.5bclk. vccsa stock 0.925v. Takes 1.58v for 5.2ghz, 1.52v for 5ghz and 1.45v for 4.8ghz. 49x max multi. Using cpu pll overvolt gets me up to 53x but its never stable in prime or gaming. Linx and superpi are fine, 3dmark 50/50.

cpu pll is the bugbear for me as well. I can do the switch on to enable and increase the value by rote but am never truly at ease with it. Are you leaving everything else at set values and repeating the cpu pll check repeatedly or is there some correlation (big word pain) with other settings that convinces you that you have a cpu pll problem. Does the bclk failure direct you straight to cpu pll?

Hope that makes sense.

[PiLsY]

Im stable right now for my 24/7 clock at 47 x 102.2. If I enable PLL overvoltage it crashes gaming . PLL OV for this chip doesnt give true stability at the higher cpu speed. Increasing CPU PLL was the key to stability at high clocks.

My first board didnt have PLL OV enabled in bios for the first few weeks so I found the limits with what I had at the time. Even when it was added to bios it only helped for benchmarking. It didnt give any extra 24/7 stability and just masked instability issues during short testing.

I've since swapped boards to a P8P67-Pro thinking it was the board doing this and its just the same. Im hoping to get another 2500k shortly so I guess I'll find out for sure then.

[kingcars]

Haven't really pushed the envelope with OCing yet but so far I've set my 2500k @ 4.2GHz on 1.044V. Been running 24/7 stable for almost a month now. I'm not lookin for 5Ghz, but I'd really like to hit 4.5 at some point when I feel like tweaking more.



Gigabyte P67X UD3-B3 motherboard with a Xigmatek Gaia cooler. Think I'll be able to hit my goal of 4.5GHz?

[OC Nub]

Decided to try a 16gb kit from my x79 board in this p67 while Im waiting for a 3930k. G.Skill Ripjaws Z 2133 c9-11-10. Didnt spend much time tweaking, but it was pretty easy to run 16gb of mem without much time spent on settings/voltages. W7-64 no tweaks, 1.38VCore set in bios LLC7 1.66VDimm, 1.160VTT for 5ghz. For 5.6ghz VCore is high, didnt spend time trying to lower it just for a 32m run. Water cooled. Not sure the batch#, just grabbed a chip from the drawer labled "good" from the plastic bin I keep hardware in. Im pretty sure its a costa rica.

[FedericoUY]

Great chip OC Nub. Just a few out there can do 5ghz @ 1.38 stable. Nice!

[OC Nub]

Thank you Federico.

[badatgames18]

A few 2700ks coming today in the mail
3128C083 (2X)
3126C259

also have 4X 2600ks
all batch
L104A418... one so far is 54X under SS
sn: 1452

anyone know any of the 2700k batches? second one i know splave has had... was it 55 or 56? awesome if you could chime in.. thanks!

[evoic]

I have a sealed Batch L137B605 and a sealed Batch L037B039 and I can't decide which one to crack open.
I plan on selling the other one and the anxiety is keeeeeeling meeeeee.

And, no, I won't tell you where I got that L037 chip.

Any thoughts here for which one to take the plunge with?
I'm a bit skeered to jump in with a Engineering Sample as a daily driver on a high overclock, so I'm leaning towards to the other one.
BUT, if I go with the other one, it might be a little trickier finding a buyer for the little Golden Chip.

Decisions, decisions.

[flesheatinvirus]

Test them both then keep the one you wish, bench results will sell the other.

[Falkentyne]

From the looks of it your chip is behaving very much like my own. In that case you should be able to go down to 1.365 then work your way down. But once again I'm not sure what exactly did it, the CPU PLL overvotalge OFF or the actual CPU PLL voltage (can anyone explain how the two are related?).

Try 1.365, but boost the CPU PLL to 1.63125...because my prime failed after 45min...I'm still working things out, Im trying more cpu pll to see if that caused the crash before I give it a tad more vcore, I would like to stay at 1.34.

It's been tested with a DMM that Internal PLL Overvoltage does not change the CPU PLL voltage at all. What is changes is anyone's guess. But this setting did not work on Engineering sample steppings (I believe the cpu's failed to POST). Only worked on final silicon. What it actually changes is anyone's guess...

And what was the result of your latest testing? you never posted back with results...

[eva2000]

A few 2700ks coming today in the mail
3128C083 (2X)
3126C259

also have 4X 2600ks
all batch
L104A418... one so far is 54X under SS
sn: 1452

anyone know any of the 2700k batches? second one i know splave has had... was it 55 or 56? awesome if you could chime in.. thanks!

fyi, splave's 2700k 56x is heading down to Australia

[evoic]

Test them both then keep the one you wish, bench results will sell the other.

I just posted this somewhere else, but wanted to reply to your advice:


As I mentioned above, it was a factory sealed Batch L037B039, listed as a Q1J1, "Intel Confidential".
The suspense was killing me, so I popped it into my non-overclocking geared rig to see how it overclocked and the following happened:

1. Boot into Windows at stock speed.
2. Check temps.
3. Reboot into BIOS
4. Go straight to 4.6Ghz without adjusting vCore or any additional settings, other than multiplier.
5. Run Prime for 45 minutes.
6. Stop Prime. Bump multiplier. Drop voltage. Stare in disbelief.
7. Go to bed because it is 3:45am.
8. Close my eyes with a $hit-eating grin on my face for what today brings.

I still have the other one sealed and once I find the limits on the ES, I'll decide how I want to proceed.
Be back later tonight with final results.

[flesheatinvirus]

There you go, now where cooking. Sounds like the ES might just be something solid though the other chip could be killer as well. Careful testing and posting results always helps. Sounds like you are going to have a great week end. Good luck with both chips and check out the other one for your answer.

[badatgames18]

fyi, splave's 2700k 56x is heading down to Australia

nice! should get some boints with that chip


here is one of the 2700ks tested so far


2700k
batch 3128C083
sn 4768
max multi: 53
Cooled by SS -47C

*probably the worst (in terms of max multi) 2700k i've seen

[sfdmalex]

It's been tested with a DMM that Internal PLL Overvoltage does not change the CPU PLL voltage at all. What is changes is anyone's guess. But this setting did not work on Engineering sample steppings (I believe the cpu's failed to POST). Only worked on final silicon. What it actually changes is anyone's guess...

And what was the result of your latest testing? you never posted back with results...

So here is my latest...

It appears that its actually the CPU PLL Overvoltage (ON/OFF) that is making all the difference. I went back to 1.8000 for the actual voltage and have been 100% stable prime and BF3 at 1.360vCore

I was passing prime at 1.6315xxx on CPU PLL but I would BSOD whilst playing BF3, so I bumped the CPU PLL to 1.800 and now it has been stable...

I just finished 2 hours of prime small FTTs at 1.355vCore x46 at 100mhz

[badatgames18]

2700k
Batch 3126C259
sn: 0799

max multi = 52..

i quit 2700ks FOREVER.

[aussie-revhead]

fyi, splave's 2700k 56x is heading down to Australia

There might be another one that validates at 5800 heading down too.

[OC Nub]

That really sucks man, just average for a 2600k. They need to do a better job than this to justify the extra cost.

[aussie-revhead]

Its average up your end of the world but you must get better silicon than us as a lot of ours won't even do 56x

:/

[OC Nub]

Sorry, I was referring to badatgames post, 2 chips and highest multi is 53.

[humeyboy]

-

Never got a reply to my above Q due to some kind of argument going on!

I tested my 2600k tonight and got to 55x Multi (I lowered BLK) before it would fail to boot to Windows, not sure if settings/voltage was limit or if 55x was Max!

Anyhow be on my 2700k in day or so when I can be bothered swapping over!

What was the normal highest Multi for 2600k's or was 55x normal and 58x luck on a good sample?

UPDATE:


2700K has been fitted for 2 days now!

56x multi (57 stalled while Windows was booting) but not sure how to test 57 or higher as 94 BLK is as low as it can go without BSOD and I do not want to take VCore and CPU-PLL too high even though its a simple quick boot into windows with no load to check Multi in CPU-Z!

I do not have the best of cooling (TT Frio) but now 5.0GHZ is stable at 1.41*v and still testing to try for lower voltage!

My 2600k was good to 4.8GHZ with lowish voltages then not stable at 4.9GHZ with decent voltages and not stable at all at 5GHZ with any safe voltages or even a tad higher for quick test as it failed in 30seconds max in even basic IBT tests!

In testing I mean proper testing not quick PI tests like some claiming 5GHZ on 1.35*v, I am running Prime 95 and IBT at Max settings but not overnight or anything near as long for Prime95 till I get to my limit then I will do so!

[aussie-revhead]

Very nice cpu there.

:P

[badatgames18]

...2600K (#L137B090) Watercooled rooomtemp 21C

looks really good,

max multi?

[LagunaX]

That is just an awesome chip...