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

[ugotd8]

So I have a scenario with my 2500k where at 4.9ghz and 1.385 vcore the system is linx stable (20 runs, all memory used, SP1 not loaded), OCCT blend stable (I let it run 4 hrs then stopped it), and memtest86+ stable (I let it run for 5 complete passes then stopped it). It fails prime (version 26.4) blend, usually within 1 hour with a stop 124 blue screen. It also crashes with handbrake video encoding with a stop 124 blue screen.

I increased vcore to 1.395 and now it encodes video without errors so far, but still bluescreens with prime blend. It also bluescreens and freezes in games at this increased vcore.

At 1.415 vcore I'm still crashing with prime blend.

So what is the logical next step if I want to keep running at 4.9ghz? Keep increasing vcore until I'm prime blend stable? Or would prime small fft's be more diagnostically useful? My memory (2 x 4gb gskill sticks) in all cases is at 1600mhz with stock timings and voltage.

Attempting to achieve overclocked real world stability with these Sandies is taxing my feeble brain. With previous generation intel chips, it seemed to me that linx and OCCT stability were usually within a couple of vcore notches of prime blend stability, and I don't recall ever having stability issues if I could prime blend for 12+ hours without errors. I wonder if I should still be aiming for prime blend stability as my gold standard of real world stability. I did try loading up SP1 and using linx with avx, but my temps on air cooling (mid 80's) made me uncomfortable and I stopped before achieving the requisite vcore to be linx + avx stable.

I don't want to concede defeat yet at 4.9ghz!!!

FWIW, I'm on a Biostar TP67XE and I was using offset vcore with LLC off and just kept having to add vcore to get prime blend almost stable. Seemed like it would never end.

When I switched to FIXED vcore and LLC on I was able to get prime blend stable at 4.8GHz 1.416V load.

Of course, now the thing randomly blue screens at idle.

[drnick]

FWIW, I'm on a Biostar TP67XE and I was using offset vcore with LLC off and just kept having to add vcore to get prime blend almost stable. Seemed like it would never end.

When I switched to FIXED vcore and LLC on I was able to get prime blend stable at 4.8GHz 1.416V load.

Of course, now the thing randomly blue screens at idle.

That's bizarre...do you remember if the blue screens are a stop 124 error or something else? I'm on an ASUS p8p67 evo mobo using fixed vcore and LLC set one notch below extreme (ultra high or something like that). You were able to get linx + avx stable though, correct?

[ugotd8]

That's bizarre...do you remember if the blue screens are a stop 124 error or something else? I'm on an ASUS p8p67 evo mobo using fixed vcore and LLC set one notch below extreme (ultra high or something like that). You were able to get linx + avx stable though, correct?

In regards to BSODs, it's always been 124 with this chip. My first one was always 101. Doesn't matter what's wrong with the OC, always 124. Same board two different chips.

Yes, I'm linx + AVX and prime95 blend (12K custom) for one hour stable.

[babalouj]

I am also having weird stability issues. At 48x100 and 47x100 (haven't checked other multis) no matter what vcore I use it fails prime blend almost instantly (BSOD) but I am completely stable with all other stability tests (linx w/ avx, futuremark, gaming, etc). It's only a problem with prime95 so I just don't run it anymore, lol.

[drnick]

I am also having weird stability issues. At 48x100 and 47x100 (haven't checked other multis) no matter what vcore I use it fails prime blend almost instantly (BSOD) but I am completely stable with all other stability tests (linx w/ avx, futuremark, gaming, etc). It's only a problem with prime95 so I just don't run it anymore, lol.

I was ready to just ignore the prime blend instability too in light of all the other tests I could pass, but I will periodically blue screen during gaming, so I'm wondering if there might be something that the prime failure is picking up that has real world application consequences.

[aytacaksel]

my friend`s cpu have same batch id but him cpu need 0.1 less voltage than me for same clock.
i have ud4 and he have p8p67 pro. batch id mean nothing or Gigabyte suck?

here my max oc batch L036B120T

[Jupiler]

Here's mine!


52 Multi

Hi,

here is my i5-2500K. Batch# is L039B120. Tested on air (Scythe Ninja 3) with GA-P67A-UD4.


5001MHz Prime Custom FFTs in-place 1.5h Run:


5501MHz Super PI 1m Run:

I knew I saw those results before.
Welcome, Digg.

[KingLex]

my friend`s cpu have same batch id but him cpu need 0.1 less voltage than me for same clock.
i have ud4 and he have p8p67 pro. batch id mean nothing or Gigabyte suck?

here my max oc batch L036B120T

I've got the same batch, and I'm running @4.5Ghz with 1.275v also on a p8p67 pro. Will try 4.7 later on, but seems a big bump in vcore for 200mhz more ? If it's the mobo that makes the difference I would say +1 for asus !