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Woes and Glory

post #1 of 6
Thread Starter 
Hi all! First post here on overclock.net! I've been a lurker for eons, though. So, to start off I have a 5ghz 6700k!! The bad, it took killing my first one frown.gif I want to start off by saying that in no way do I blame Silicon Lottery for my blunder! With my first 4.8 binned 6700k from Silicon Lottery the core temps were quite varied, perhaps a bit high. Despite the 6700k performing better than I paid for at 1.39 vcore 4.9 core 4.9 cache. It was a 4.8 binned chip! I really felt like if the core temps were even, and perhaps lower, that I might be able to hit the elusive 5ghz 24/7 stable. Otherwise, it was as high as it would go. I decided that I wanted to up my cooling with more fans, case mods, lap the IHS.. re-delid.. and I killed it frown.gif

It turns out that the sealant in the reseal was not uniform to the outer perimeter of the IHS. Some of it got close to the core. I feel this did contribute to the variation in core temps, but I cannot confirm. In normal operation, this never would have been an issue. I'm confident that it would have ran without a hitch for many, many years to come. Once I got the razor to go all the way around I was at a loss, and pulled, even though gently. I heard the pop! My heart sank, and I ordered a G4400 to serve me as a backup... Which actually did quite well!

So, I saved and ordered a new 4.8 binned 6700k. But, this time I requested to not have the IHS sealed back on! I didn't know that was an option until after I already had my first 6700k.

I used the IHS that I lapped from my first 6700k, applied CLU to the core, and IHS surface (used thermal grizzly on the first), and viola!

1.455 vcore, and 4.8 cache, but the temps are in check! 5ghz! I'm considering posting to the 5 GHz 24/7 OC Club, but it seems like the mod is on hiatus, busy, and or reevaluating the qualifications. I may still, but yeah..

I would not do it again! Not worth, but totally satisfied! Getting more than you pay for seems to be a theme from Silicon Lottery! biggrin.gif
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Boxy
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post #2 of 6
Thanks for the feedback!
Quote:
Originally Posted by AzimErebus View Post

It turns out that the sealant in the reseal was not uniform to the outer perimeter of the IHS. Some of it got close to the core. I feel this did contribute to the variation in core temps, but I cannot confirm.

This is by design. By having some of the silicone on the inside, we can have the IHS as close to the core as possible (very thin layer on the perimeter.) This does not impact temperatures negatively, in fact it gets us to parity of using a non-sealed IHS. Every CPU is different, and some just have cores that vary in temperature, no matter how many dozens of remounts. (I've played with this extensively.)
post #3 of 6
Thread Starter 
I can see that, for sure. The core temperatures were varied enough, that I just had to tinker doh.gif It all makes sense to me now, quite the learning experience! It did seem extremely thin on the perimeter. It was my first delid attempt, despite my research, it caught me off guard. What I should have done, is looked into the measurements of the pcb edge to the core, and marked my razor for that depth; not knowing I was too afraid to nick the core. I knew the risk going in, though. In a way I got my monies worth, because a 5ghz chip would cost around what I paid for both. Not at the voltage that I'm running, or what I intended, but still.. thumb.gif

Blazing fast shipping, too!
Boxy
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Boxy
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post #4 of 6
Thread Starter 
After some tinkering in the bios. I'm now stable at 1.435 vcore at 5ghz biggrin.gif Nothing massive, but it did lower my temps by a few degrees thumb.gif

For whatever reason. I cannot get my cache to go above 4.8 no matter what. Which is nothing really, just interesting.
Boxy
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Boxy
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post #5 of 6
Nice Job !!! What kind of temps, under load are you seeing? thumb.gif
post #6 of 6
Thread Starter 
At 1.455 my highest core would hit 83c from time to time. Mostly it would shift between 79c and 81c, though. At 1.435 81c is my highest, but it mostly just sits at 79c sometimes 80c. So , I'm mostly at my limit. At 1.455 I can boot 5.1ghz, and poke around windows, but it crashes instantly in any stress test. I did bump it up to 1.46 at 5.1ghz just to see, but it only lasts 20 seconds or so longer.

Even at 1.435 I'm a bit concerned of unseen voltage spikes above 1.52. I need to pick up a multi meter. I don't see myself picking up an oscilloscope any time soon. I only have an H100iGTX, but I have a ton of fans 5x140, 6x120 (4 being on the rad), and 2x80 with loads of airflow. One day maybe I'll get a multi meter, and a custom loop, but for now, that's about as good as it's going to get.
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Boxy
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