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Working on a 5820k OC

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Cranked the fans to 100%, set the BCLK to 103.2MHz, same vCore, same everything. 4750MHz, DDR4@3300/14-16-16-35 1T. Just passed 30 min of RealBench with 70c on the hottest core with a 23c ambient!
RealBench-20160721200617.png
 
yyyyyowwwwwww trade me ill give you 50 bucks plus my 4.375ghz 1.21v chip:)


...not really but nice work and nice chip.
 
Nice! Happy to say the info provided here helped stereo555. He managed 4.5Ghz @ 1.3v with his 5930K. Quite a leap since he's been having issues just to get 4.0-4.1Ghz stable! I made a mistake and thought he had a 5820K :eek:
 
^Cool!

I've noticed a few thing through all allong this overclocking path:

- 101 and 124 BSOD's doesn't seem to be always linked to vCore/Cache Voltage/VCCIN: it seems that increasing the VCCSA helped, which means it could be caused by unstable memory/IMC. Need to dig this one...

- Despite the +0.5v on VCCIN over vCore rule, I need 2.05v to stabilise @4.8GHz+ (it is +0.7v over vCore...).

- I am now on +0.450v VCCSA, it helped me increasing the DDR4 frequency above 3333MHz whereas I was hitting a wall there. Going to see how high it goes. I believe the max safe is +0.5v.
 
You are asking to degrade IMC with that +0.45V SA. For 4x8GB 3200 kits you don't need much more than +0.05-0.1V. Stock is ~0.95V, max which is helping in most cases is ~1.1V. I haven't seen it helping above that. To stabilize it you can check other settings, maybe PLL or something.

Yesterday I installed X99 on bench table ( I wasn't using it for longer ) and wanted to check how it's working with the latest BIOS. At least for X99M Killer 3.1 the latest BIOS won't let me to set higher cache frequency as there are no PLL voltages and additional options which are available in P1.31/P1.40 versions ( OC/beta but available in download section ).

For quick tests I had [email protected] 1.18V, [email protected] 1.25V, RAM@3400 C15 1.35V and SA +0.1V ( ~1.05V ).
I wanted to check if I'm able to boot with memory above 3500 but I can't. Max stable bclk is ~130 so it gives me:
130x 26.00 = 3380
130x 26.66 = 3465 <- this is max
127.5 x 26.66 = 3400 <- this is pretty stable
125.0 x 30.00 = 3750 <- this can't boot
127.3 x 30.00 = 3819 <- this would be theoretical max but can't boot
28 memory ratio is not working
 
Thanks Woomack.

Will try lowering the vccsa.

I was not really worried as I noticed advice up to +0.5v vccsa for their high speed/low latency ddr4. But I'd rather follow your advice! ;)
 
You are asking to degrade IMC with that +0.45V SA. For 4x8GB 3200 kits you don't need much more than +0.05-0.1V. Stock is ~0.95V, max which is helping in most cases is ~1.1V. I haven't seen it helping above that. To stabilize it you can check other settings, maybe PLL or something.

Yesterday I installed X99 on bench table ( I wasn't using it for longer ) and wanted to check how it's working with the latest BIOS. At least for X99M Killer 3.1 the latest BIOS won't let me to set higher cache frequency as there are no PLL voltages and additional options which are available in P1.31/P1.40 versions ( OC/beta but available in download section ).

For quick tests I had [email protected] 1.18V, [email protected] 1.25V, RAM@3400 C15 1.35V and SA +0.1V ( ~1.05V ).
I wanted to check if I'm able to boot with memory above 3500 but I can't. Max stable bclk is ~130 so it gives me:
130x 26.00 = 3380
130x 26.66 = 3465 <- this is max
127.5 x 26.66 = 3400 <- this is pretty stable
125.0 x 30.00 = 3750 <- this can't boot
127.3 x 30.00 = 3819 <- this would be theoretical max but can't boot
28 memory ratio is not working

You were absolutely right, as usual when it comes to memory!

Dropped to +0.15 for now, and it is totally fine.

Don't know where I took this +0.45v from, maybe the beer in excess!
 
Well, got it stable (RealBench/1 hour)@4.8GHz/1.32v. By lowering the cache to 4200MHz.

Will dig a bit further tonight (see if I can tweak the DDR4 to 13-15-15 and the cache to 4300, and why not a tad less of vCore...

4.8_1.32.jpg
 
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