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== Haswell-E Overclock Leaderboard & Owners Club == - Page 1354

post #13531 of 22233
Quote:
Originally Posted by Silent Scone View Post

No, I'm pretty certain it is an expoy, likely silver and conductive as offers great heat transfer. Or maybe not, take it apart and find out wink.gif

There is no form of expoy that I can imagine that would be remotely as efficient. The best thermal epoxies have worse thermal conductivity than mediocre thermal pastes.

There was definitely solder under the lid of my Nehalem, and I've seen later parts desoldered.

In general, if you see a gold layer under the IHS, that is going to mean solder. Gold has higher wettability for indium solder, and there is zero reason to use gold with an epoxy based adhesive. Haswell-E(P/X) has a gold layer on the underside of the IHS.

Edit: http://www.overclock.net/t/1510173/the-new-haswell-e-cpus-will-be-delidable/10#post_23856574

100% solder, no doubt about it.
Edited by Blameless - 10/15/15 at 5:17pm
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post #13532 of 22233
Overclock stable no issues, just a question.
I'm getting conflicting information when Googling this so I thought I'd ask the experts.

Around hhat cache voltages should you be using for 3.3Ghz (no oc socket), I did leave it on Auto with a offset of Auto, but from what I've been reading it's better to set it manually.

What's a good starting voltage for 3.3Ghz or 3.5Ghz?

post #13533 of 22233
3.3GHz cache shouldn't need any more than stock (1.05v). 3.5GHz may need anywhere from stock to 1.1v, depending on the part.
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post #13534 of 22233
Quote:
Originally Posted by Blameless View Post

3.3GHz cache shouldn't need any more than stock (1.05v). 3.5GHz may need anywhere from stock to 1.1v, depending on the part.

So I'm guessing that's why Auto worked so well..lol

I just tried 3.5Ghz at 1.050v instant freeze in AIDA64, so I'm thinking maybe more along the lines of 1.100v - 1.150v like you said.
The x99a Gaming 7 doesn't have a OC socket either.
post #13535 of 22233
Hi there.

Even Though I purchased Gigabyte x99-UD5 WiFi and i7-5820K in summer - I had to wait for ddr4 memory - it took them almost two months to get from USA to Israel.

Now I finally could begin to have some fun :

Test system:
Open Air :
Motherboard: Gigabyte X99-UD5 WiFi Bios - Latest Beta F10D.
Processor: Intel I7-5820K
Ram: Mushkin DDR4 4x8gb 2666Mhz 15-15-15-36 1.2
Cooler: Noctua U14S with stock fun.
Lets Begin:
SETUP:



For Every Day use My rig is 4000Mhz CPU and 2666Mhz memory.
It requires about 1.025VCore under the load with all power saving futures on and 1.220VMEM.

Than today I decided to dare more. - and traveled to uncharted territory:


to get 4500Mhz fully stable oc - following parameters were used:

1.2Vcore - LLC - Medium. It resulted in 1.195Vcore under the load.
VRIN - 1.85
memory was left to default 2133Mhz - so no tweaking - I will come back to memory oc later.






Than came 4600Mhz 1.225Vcore and finally 4700Mhz with 1.275Vcore Cinebench R15 Stable.
I should Note that although 4600Mhz was fully stable under RealBench test - I cannot say the same about 4700Mhz 1.275Vcore.
It Could not sustain RealBench multitasking test and blue screened with 0x124 error.
Anyway I remember reading at some forum, That OC-ED Processor that is CineBench stable 4500Mhz 1.2 Vcore - Considered to be a good one.
I hope when I put my 5820K under wc - I can get even better results.
That is all for now.
I could not oc memory even a liitle bi - only succeeded in lowering timings from 15-15-15 to 14-14-14 at 2666Mhz.

For the last - some thoughts about Gigabyte x99-ud5 wifi motherboard:
Honestly if I knew that it would cause me so much trouble I would never touch it in the first place:
It's extremely sensible to memory oc and famous "A9" error code - that gave me headaches until I upgraded it to latest beta bios F10D( that specifically addresses this particular Problem(could not enter bios if HDD contains Hidden OS System partitions). It took to gigabyte engineers more than half an year to address this notorious problem and they even did not bother to mention it in description - just: improves HDD compatibility".

Thats all for now.
I will update post after I Put all of them under WC.

Until then.
post #13536 of 22233
Quote:
Originally Posted by sirbaili View Post

Warning: Spoiler! (Click to show)
Hi there.

Even Though I purchased Gigabyte x99-UD5 WiFi and i7-5820K in summer - I had to wait for ddr4 memory - it took them almost two months to get from USA to Israel.

Now I finally could begin to have some fun :

Test system:
Open Air :
Motherboard: Gigabyte X99-UD5 WiFi Bios - Latest Beta F10D.
Processor: Intel I7-5820K
Ram: Mushkin DDR4 4x8gb 2666Mhz 15-15-15-36 1.2
Cooler: Noctua U14S with stock fun.
Lets Begin:
SETUP:



For Every Day use My rig is 4000Mhz CPU and 2666Mhz memory.
It requires about 1.025VCore under the load with all power saving futures on and 1.220VMEM.

Than today I decided to dare more. - and traveled to uncharted territory:


to get 4500Mhz fully stable oc - following parameters were used:

1.2Vcore - LLC - Medium. It resulted in 1.195Vcore under the load.
VRIN - 1.85
memory was left to default 2133Mhz - so no tweaking - I will come back to memory oc later.






Than came 4600Mhz 1.225Vcore and finally 4700Mhz with 1.275Vcore Cinebench R15 Stable.
I should Note that although 4600Mhz was fully stable under RealBench test - I cannot say the same about 4700Mhz 1.275Vcore.
It Could not sustain RealBench multitasking test and blue screened with 0x124 error.
Anyway I remember reading at some forum, That OC-ED Processor that is CineBench stable 4500Mhz 1.2 Vcore - Considered to be a good one.
I hope when I put my 5820K under wc - I can get even better results.
That is all for now.
I could not oc memory even a liitle bi - only succeeded in lowering timings from 15-15-15 to 14-14-14 at 2666Mhz.

For the last - some thoughts about Gigabyte x99-ud5 wifi motherboard:
Honestly if I knew that it would cause me so much trouble I would never touch it in the first place:
It's extremely sensible to memory oc and famous "A9" error code - that gave me headaches until I upgraded it to latest beta bios F10D( that specifically addresses this particular Problem(could not enter bios if HDD contains Hidden OS System partitions). It took to gigabyte engineers more than half an year to address this notorious problem and they even did not bother to mention it in description - just: improves HDD compatibility".

Thats all for now.
I will update post after I Put all of them under WC.

Until then.

Looks like you got a real nice chip to hit such high clocks at such low voltage! I've been working on an oc too. I'm finding that prime95 v28.7 is a lot tougher to stabilize than the other stress testers I've got. My OC was working for everything else I threw at it. It bothered me that my system could not run that program without computational errors or crashes, so i went back to the bios to do some more tweaking.

I was getting rounding errors and sometimes CLOCK_WATCHDOG_TIMEOUT errors. First I tried increasing LLC a notch to get a higher input voltage without bumping vcore, that didn't help. Then I tried more vcore and that did help. Then I back off vcore a little and then up again to find where it really needed to be and no higher.

I don't like letting prime v287 run for very long because temps just get too high for my taste. I want to see that the cpu computes the right answer given the instructions its being asked to run, but I'm not willing to let it roast at 80 to 95c for hours on end. I'll do longer stress tests with other programs but very limited tests with that program specifically. I let it go thru its first 3 passes on the 'blend' test and thats it.

I've switched to adaptive mode so voltage is super low at idle. I'm using an asus x99-pro board.
- cpu multi = 44x
- cache multi = 33x
- llc = level 6
- adaptive mode
- offset = 0.005v
- additional turbo voltage = 1.197v
- xmp + slightly tweaked timings = 2400, cl15 + 36ras + cr1
- custom fan curves
Everything else is on auto.

I end up with 0.816v at idle and 1.216v under full load, with an input voltage that ranges from 1.904 to .1888.

I can run everything else with a much lower additional turbo voltage of 1.185, including prime95 v279. It's just prime95 v287 that's been real difficult. The scary high max temps in the screenshot below are from prime running. At the time screen was captured aida stress cpu+fpu+cache was running with much more livable temps.



The 44x cpu and 33x cache gets a 6.15fps score.

Edited by michael-ocn - 10/16/15 at 12:19am
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post #13537 of 22233
Quote:
Originally Posted by Blameless View Post

There is no form of expoy that I can imagine that would be remotely as efficient. The best thermal epoxies have worse thermal conductivity than mediocre thermal pastes.

There was definitely solder under the lid of my Nehalem, and I've seen later parts desoldered.

In general, if you see a gold layer under the IHS, that is going to mean solder. Gold has higher wettability for indium solder, and there is zero reason to use gold with an epoxy based adhesive. Haswell-E(P/X) has a gold layer on the underside of the IHS.

Edit: http://www.overclock.net/t/1510173/the-new-haswell-e-cpus-will-be-delidable/10#post_23856574

100% solder, no doubt about it.

That looks more like solder, but a silver based epoxy could look very similar once set. I'm aware of the application for gold. I should have known you'd seen one somewhere else or else you would have dropped the topic by now lol.
post #13538 of 22233
Ok one more cache question.
In theory if I'm only running 2666Mhz ram (which I am) there wouldn't be any real need to increase the cache any higher than stock would there.
If you're running 3000Mhz+ it would make sense, but if your ram is slower than the cache I noticed there is zero benefit in benchmarks to increase it, the numbers stay the same.

Correct me if I wrong though.
post #13539 of 22233
Faster cache is faster cache; facilitating main memory performance is not the only benefit of clocking it higher. Inter-core communication depends on cache speed, as does accessing anything actually in the cache itself.

Of course, for most uses, cache speed is far less critical than core speed, and running stock cache isn't going to hurt most real world apps (outside of archival software) to any noticeable degree.
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post #13540 of 22233
Quote:
Originally Posted by Blameless View Post

Faster cache is faster cache; facilitating main memory performance is not the only benefit of clocking it higher. Inter-core communication depends on cache speed, as does accessing anything actually in the cache itself.

Of course, for most uses, cache speed is far less critical than core speed, and running stock cache isn't going to hurt most real world apps (outside of archival software) to any noticeable degree.

Nope that's fine, I don't mind learning the ropes.
First time I've actually delved this deep into overclocking, I generally went for the "safe" overclocks on my 3570k and 4790k, I'm trying to push the x99 harder..lol.

Now with these settings everything is stable, the moment I move the cache past stock (3.3Ghz) AIDA64 will pickup a hardware fault.

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