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Broadwell-E thread - Page 606

post #6051 of 6486


Hey all, is 1.26v @ 4.3 a decent sample of a 6900k? My issue is with my Noctua NH-D15 i'm hitting 80C in Aida with everything stress tested for >1hr, so I think i'll need water cooling if I want to go any higher. The reason I ask, is investing in custom loop is kind of a commitment.
post #6052 of 6486
Quote:
Originally Posted by Driller au View Post

First up G'day from Australia smile.gif fist time poster here although i have been following this thread for a while.
I have a problem with my i7 6850k OC , first i did a OC in manual mode and all seemed good and have ran it for about 2 months no worries so i decided to give adaptive mode a go and it seems to stress test ok but i haven't done a lot of testing so far because of this problem which is when i put windows into balanced mode and the voltages and frequencies drop windows will lock up especially if i open chrome but also just on desktop just with HWinfo64 open. If i put windows in performance mode all is good
My settings :
Core clock = x 43 on 100 strap
Cache clock = min 16 max 30 < dropped the min to see if that was the problem
Highest CPU package temp during stress test = 70 deg C
VCCIN = 1.90 V in bios 1.872 in HWinfo64
LLC = LvL4
vCore = 1.280 V adaptive< I tried adding a 0.040 offset to up the idle voltages to no effect, currently no offset
vCache = 0.140 offset 1.128 V at idle in HWinfo
VCCSA = 1.000 V offset in bios 0.960 in HWinfo
VCCIO= 1.144 V had this set at this always
RAM clock & timings = 16GB 3200 17-18-18-36- 2T
vDIMM = 1.350V
With the RAM timings i copied these from the xmp settings @ 3333 MHz, xmp set the strap and blk to 125 which i changed to 3200 with 100 strap
Thanks in advance for any ideas

Quote:
Originally Posted by erukian View Post



Hey all, is 1.26v @ 4.3 a decent sample of a 6900k? My issue is with my Noctua NH-D15 i'm hitting 80C in Aida with everything stress tested for >1hr, so I think i'll need water cooling if I want to go any higher. The reason I ask, is investing in custom loop is kind of a commitment.

Hi guys and welcome to ocn! specool.gif

@Driller au
You have a similar system to mine.
I'd just try a higher LLC (5 or 6)
And in case a bit of more vcore.
Those ram at 3333 are quad channel (X99 certified) or dual channel?
Agree about the vccsa, is a value where you really have to spend time for fine tunning, also in gaming with different titles (if possible)

@erukian
Nice cpu mate, wanna sell it? biggrin.gif
In case let me know thumb.gif
However I wouldn't push it any further on air cooling, even better going down to 4200 at these temps.
On wc it's a different story wink.gif
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Arrow I7
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Intel 750 NVMe 400Gb, 2500Pro 180Gb Crucial MX300 750Gb LE, 2x Barracuda 3Tb Cooled by EKWB, Watercool, Alphacool, Koolance XSPC RX360 v3, 2x240 rads 
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post #6053 of 6486
Quote:
Originally Posted by arrow0309 View Post

@cekim
Has your memory bandwidth performance remained unchanged with a lower vccsa?
How high was it before?
Looks roughly the same - I just stopped playing BF1, so I'm sure it was a less than ideal "pre-condition", but its in the same ballpark (see below)

1.2 was what I seemed to need to get stable. going down in small increments produced memory errors.

Frankly, I'm wondering if I am mis-remembering issues with the old memory kit that I now know to have had significant correctable CRC errors. That's why I re-tested. I changed memory kits a month or so ago.
post #6054 of 6486
Quote:
Originally Posted by erukian View Post



Hey all, is 1.26v @ 4.3 a decent sample of a 6900k? My issue is with my Noctua NH-D15 i'm hitting 80C in Aida with everything stress tested for >1hr, so I think i'll need water cooling if I want to go any higher. The reason I ask, is investing in custom loop is kind of a commitment.
1.26 for 4.3 is fantastic to the point of questionable (as in, I bet you could find a non-prime95 use case that could crash it, but if you haven't seen it crash yet, then go with it).

As for whether you are guaranteed big "gainz" by adding water, the answer, I'm afraid is very much no (guarantee). At or above 4.3 these chips go exponential in their requirements for voltage and some just won't do it.

You will get lower temps and potentially less noise as a result with the right setup, but don't go into this expecting the only thing between you and 4.5 is water.

1.26v/4.3 80C on a D15 sounds a little odd though too... 1.26v 6900 should be pretty tame heat-wise unless your fans are set to silent. Is that adaptive or fixed? If adaptive, then VID might be overriding and you are actually running at higher voltages than set in the bios (check aida or hwinfo).

Unless of course, that's AUS w/o A/C, so your ambients are high?
post #6055 of 6486
p.s. a few people around here swear by high Vin (1.9+) including Asus in their original OC guide for BWE, but I have to say that I've yet to see it do anything to my particular 6950x other than make it run a few to 10C warmer depending... I've been driving that value down over the last month (since changing memory kits) and I've seen no benefit to high or detriment to low. It just doesn't seem to matter.
post #6056 of 6486
The
Quote:
Originally Posted by cekim View Post


1.26v/4.3 80C on a D15 sounds a little odd though too... 1.26v 6900 should be pretty tame heat-wise unless your fans are set to silent. Is that adaptive or fixed? If adaptive, then VID might be overriding and you are actually running at higher voltages than set in the bios (check aida or hwinfo).


I used the Asus overclock guide to get me started, and other than having all cores at 4.3, I enabled adaptive core voltage and set it to 1.2v per this guide. (last screenshot)

http://edgeup.asus.com/2016/06/17/broadwell-e-overclocking-guide/7/

But I don't see any additional voltage going through the CPU when stress testing it with either CPU-Z or Aida64 monitoring the CPU core voltage. Am I missing something?

As for the CPU temps, i'm only looking at package temp, which seems to be always ~10C hotter than the actual cores.
post #6057 of 6486
Quote:
Originally Posted by erukian View Post

The
I used the Asus overclock guide to get me started, and other than having all cores at 4.3, I enabled adaptive core voltage and set it to 1.2v per this guide. (last screenshot)

http://edgeup.asus.com/2016/06/17/broadwell-e-overclocking-guide/7/

But I don't see any additional voltage going through the CPU when stress testing it with either CPU-Z or Aida64 monitoring the CPU core voltage. Am I missing something?

As for the CPU temps, i'm only looking at package temp, which seems to be always ~10C hotter than the actual cores.
Adaptive voltage with SVID enabled will override your setting if your chosen voltage is lower than the VID table for a given frequency.

You should see that in Aida though and it sounds like you set 1.2 and it went to 1.26 on its own? If so, you aren't missing anything.

So, you might just have a really good chip. Have you tried cranking the fan(s) on the D15 to 100% and see what you can do?

Yes, package temps on my system seem to be largely a function of the IMC and cache voltages as the dominating factor. Though at peaks, my core and package track each other (a core 68 peak will be reflected in a package 68 peak). At idle and mid-load, the package is 10C higher when I'm running at 3200 memory. Lowering Vin to 1.80-1.82 doesn't seem to reduce my stability, but does drop package temp a little. As does lowering the cache offset if you can get away with it.
post #6058 of 6486
Quote:
Originally Posted by cekim View Post

Adaptive voltage with SVID enabled will override your setting if your chosen voltage is lower than the VID table for a given frequency.

You should see that in Aida though and it sounds like you set 1.2 and it went to 1.26 on its own? If so, you aren't missing anything.

So, you might just have a really good chip. Have you tried cranking the fan(s) on the D15 to 100% and see what you can do?

Yes, package temps on my system seem to be largely a function of the IMC and cache voltages as the dominating factor. Though at peaks, my core and package track each other (a core 68 peak will be reflected in a package 68 peak). At idle and mid-load, the package is 10C higher when I'm running at 3200 memory. Lowering Vin to 1.80-1.82 doesn't seem to reduce my stability, but does drop package temp a little. As does lowering the cache offset if you can get away with it.


Yeah, I'm not showing the package temp as tracking any peaking cores during load.

Here's the results of 20 mins of stress w/ the fans at 100%.



post #6059 of 6486
Quote:
Originally Posted by cekim View Post

p.s. a few people around here swear by high Vin (1.9+) including Asus in their original OC guide for BWE, but I have to say that I've yet to see it do anything to my particular 6950x other than make it run a few to 10C warmer depending... I've been driving that value down over the last month (since changing memory kits) and I've seen no benefit to high or detriment to low. It just doesn't seem to matter.
I think people are basing their opinion on VCCIN from HW X265 becnmark tool.
http://hwbot.org/benchmark/hwbot_x265_benchmark_-_4k/
I think this is the only tool available for us to fine tune VCCIN.

VCCIN has always been at 1.92 ~1.95V (with LLC at 5) for me. I have not tried to lower it though.
X99 System
(16 items)
 
Z170 System
(13 items)
 
 
CPUMotherboardGraphicsRAM
Intel 6950X @ 4.4GHz ASUS Rampage V Edition 10 2x TITAN Xp (3840 CUDA cores) SLI G.Skill TridentZ 3200 14-14-14-34 1T 32GB 
Hard DriveCoolingOSMonitor
4x Intel 730 Series SSD 480GB RAID-0 EK custom loop + Mo-Ra 3 Windows 10 Pro x64 DELL S2716DG 144Hz G-Sync 
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Corsair K65 RGB Rapidfire Corsair AX1500i Lian Li PC-O9 WX Logitech G303 
Mouse PadAudioOtherOther
Corsair Vengeance MM600 ASUS SupremeFX + harman kardon SoundSticks III ... Synology DS716+ NAS 12TB 1Gbps FTTH 
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Intel 6700K @ 4.7GHz ASUS Sabertooth Z170 S ASUS Strix GTX1080OC SLI 16GB DDR4 Corsair Dominator Platinum 
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2x Intel 730 Series SSD 480GB RAID-0 Seagate 2TB Corsair Hydro Series H115i Windows 10 Pro x64 
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X99 System
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Z170 System
(13 items)
 
 
CPUMotherboardGraphicsRAM
Intel 6950X @ 4.4GHz ASUS Rampage V Edition 10 2x TITAN Xp (3840 CUDA cores) SLI G.Skill TridentZ 3200 14-14-14-34 1T 32GB 
Hard DriveCoolingOSMonitor
4x Intel 730 Series SSD 480GB RAID-0 EK custom loop + Mo-Ra 3 Windows 10 Pro x64 DELL S2716DG 144Hz G-Sync 
KeyboardPowerCaseMouse
Corsair K65 RGB Rapidfire Corsair AX1500i Lian Li PC-O9 WX Logitech G303 
Mouse PadAudioOtherOther
Corsair Vengeance MM600 ASUS SupremeFX + harman kardon SoundSticks III ... Synology DS716+ NAS 12TB 1Gbps FTTH 
CPUMotherboardGraphicsRAM
Intel 6700K @ 4.7GHz ASUS Sabertooth Z170 S ASUS Strix GTX1080OC SLI 16GB DDR4 Corsair Dominator Platinum 
Hard DriveHard DriveCoolingOS
2x Intel 730 Series SSD 480GB RAID-0 Seagate 2TB Corsair Hydro Series H115i Windows 10 Pro x64 
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post #6060 of 6486
I don't see how some of you can run such low SA volts with 3000+ memory and 4 dimms my cpu takes 1.22 to be stable anything under 1.20 wont even post with all 32gigs.
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SABERWOLF
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XEON-WOLF
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CPUMotherboardGraphicsRAM
Intel Core i7-6800K MSI X99A GAMING PRO CARBON EVGA GTX 1080 FTW Hydro Copper G.SKILL TridentZ Series 
Hard DriveCoolingCoolingCooling
Samsung EVO 850 500 EK-SBAY Dual DDC 3.2 PWM Serial Alphacool NexXxoS ST30 Full Copper Radiator 360 Hardware Labs Black Ice SR2 Multiport Black Car... 
CoolingCoolingOSMonitor
EK-CoolStream RAD XTC 420 koolance 380i Windows 10 Pro ASUS VW246H Black 24" 2ms 
PowerCaseMouseAudio
SeaSonic M12D SS-850 850W  Thermaltake core x71 CM Storm Sentinel Advance II Corsair Void 
CPUMotherboardGraphicsRAM
X5675@4400 1.344 ASUS P6X58D-E XfX RX480 RS F3-12800CL7T-6GBPI 6-7-6-21 1T 
RAMHard DriveHard DriveHard Drive
F3-12800CL9S-4GBRL WDC WD1001FALS-00J7B1 ST31000340AS WDC WD7500AAKS-00RBA0 
Hard DriveOptical DriveCoolingOS
Hitachi HDS723020BLA642 ihas 624-A SilverStone Heligon HE01 windows 10 64 Pro 
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