5820K overclock help

Richard-h2 · 14 Jan 2015 at 00:43

well glad to see that 80 is all good .. Id like water cooling but its going to cost a lot to only get a few more Hz

Not sure why my core 3 is more but think it might be worth doing the thermal stuff again to see if I can change that.

AndrewUK1990 · 16 Jan 2015 at 08:11

I hit a wall at 4.4ghz and thought it was the Vcore that needed to be increased to go above this (which I didn't want to go above 1.3v so I left it at this) while being completely stable but as I found out from some more tinkering yesterday I can get mine to 4.5Ghz+ with the same Vcore of 1.3v. I found the problem causing random instability was the VCCIO. My ram is set to XMP1 @ 2666mhz and I can get the computer to run stable with a VCCIO of 1.1v as appose to the standard 1.05v which causes it to occasionally crash when the CPU is above 4.4ghz.

I also think I could get it stable with the ram on XMP2 @ 2800mhz but it was looking like it would require a VCCIO=1.35v which I didnt want to do knowing that the reccomended safe max is 1.1v so Ive left the ram on XMP1. Anyway just wanted to share this so other people could try adjusting this voltage if they too are hitting the wall to see if it is also a limiting factor on their pc!

For reference, stable to me = no crashes / errors in games, benchmarks or IBT @ max.

abui1806 · 16 Jan 2015 at 08:38

Thank you Andrew. I am hitting the wall of 4.4Ghz on both of my 5820Ks as well. I will try to adjust as your provided information although my RAM is at a lower speed of 2400Mhz.

Legend · 16 Jan 2015 at 10:39

Richard-h2 said:
Not sure why my core 3 is more but think it might be worth doing the thermal stuff again to see if I can change that.

I think every CPU I've owned as had one core that runs hotter for some reason, and reapplication of TIM didn't change that. It's not unusual from what I've read.

abui1806 said:
Thank you Andrew. I am hitting the wall of 4.4Ghz on both of my 5820Ks as well. I will try to adjust as your provided information although my RAM is at a lower speed of 2400Mhz.

Likewise, 4.4 on my 5820k with 2400mhz RAM seems to be my stable ceiling also. From what I've been reading, anyone who gets more than that is lucky with these chips.

abui1806 · 16 Jan 2015 at 11:16

I tried to increase the VCCIO as suggested by Andrew. It does not work out. It seems both of my chip cant stable at 4.5Ghz given any kind of vcore.

AndrewUK1990 · 16 Jan 2015 at 11:25

That's a shame. I guess it's just not as much of a limiting factor with lower clocked ram. For me it wouldn't even boot if cpu was at 4.4ghz and ram at 2800mhz unless i increased vccio to 1.2v. My vccin is 1.9v as well don't know if you've already tried adjusting that?

What mobo you got just out of interest?

Silent_Scone · 16 Jan 2015 at 11:28

2V VCINN is quite high. Try to keep it below 1.95v if possible.

abui1806 · 16 Jan 2015 at 11:48

AndrewUK1990 said:
That's a shame. I guess it's just not as much of a limiting factor with lower clocked ram. For me it wouldn't even boot if cpu was at 4.4ghz and ram at 2800mhz unless i increased vccio to 1.2v. My vccin is 1.9v as well don't know if you've already tried adjusting that?

What mobo you got just out of interest?

My settings are as follow:

CPU voltage 1.30v to 1.38v,increment of 0.01v whenever it fails the stable test (3dsmax rendering).
VCCIO 1.15v
VCCIN 1.95v
RAM at 2400Mhz

I am using an ASUS X99-S with the lastest bios. :mad:

Silent_Scone · 16 Jan 2015 at 11:53

You might want to add some additional cache (ring) voltage if you haven't done so already. Would also help if you could give us the exception codes from the BSOD when it's falling over. VCCIO/VCCSA is a non linear voltage, it will have dead spots. My chip likes around 0.9 for 2400 but 1.03 for 3000. You may well find that much VCCIO is causing you issues, even if there is another red herring in your overclock.

abui1806 · 16 Jan 2015 at 12:09

Silent_Scone said:
You might want to add some additional cache (ring) voltage if you haven't done so already. Would also help if you could give us the exception codes from the BSOD when it's falling over. VCCIO/VCCSA is a non linear voltage, it will have dead spots. My chip likes around 0.9 for 2400 but 1.03 for 3000. You may well find that much VCCIO is causing you issues, even if there is another red herring in your overclock.

I just tried to increase the cache voltage to adaptive mode +0.2v but still unstable.
And the code when it bsod is WHEA_UNCORRECTABLE_ERROR.

AndrewUK1990 · 16 Jan 2015 at 12:10

Those voltages seem high enough to the point they shouldn't be causing any problems i wouldn't have thought. For reference mine are:
CPU multi - 45
CPU state - Adaptive speed & voltage with EIST
CPU voltage - 1.295v with +25% Vdroop control
VCCIN - 1.10v
VCCIO - 1.90v

Everything else is on auto and my board is an MSI X99 Gaming 9 AC. Have you got both the 4 pin and 8 pin atx connectors plugged in? Other than that you may well have just hit the very limit of your cpu I guess. Still 4.4ghz on this thing is rapid!

Silent_Scone · 16 Jan 2015 at 12:24

Try with a fixed cache voltage of 1.2v to rule it out

abui1806 · 16 Jan 2015 at 12:40

AndrewUK1990 said:
Those voltages seem high enough to the point they shouldn't be causing any problems i wouldn't have thought. For reference mine are:
CPU multi - 45
CPU state - Adaptive speed & voltage with EIST
CPU voltage - 1.295v with +25% Vdroop control
VCCIN - 1.10v
VCCIO - 1.90v

Everything else is on auto and my board is an MSI X99 Gaming 9 AC. Have you got both the 4 pin and 8 pin atx connectors plugged in? Other than that you may well have just hit the very limit of your cpu I guess. Still 4.4ghz on this thing is rapid!

My Asus X99-S only has 1 8 pin ATX connector

Silent_Scone said:
Try with a fixed cache voltage of 1.2v to rule it out

Just tried and still failed miserably

Silent_Scone · 16 Jan 2015 at 13:08

Post up screens of your BIOS settings, something is going to be a miss if you're falling over with WHEA almost immediately. Roll back a couple of notches on the multi and try again with the same voltages

abui1806 · 16 Jan 2015 at 14:04

Here are the settings in the bios. It is perfectly stable at 4.4Ghz with 1.29v but it just questionably unstable at 4.5Ghz for any given voltages

. Temperature when it crashed was around 82*C

Silent_Scone · 16 Jan 2015 at 14:33

Ok, put VCCIO back to auto. Use System Agent voltage in Auto. Apply memory XMP profile, reapply CPU multi, double check DRAM voltage is applied correctly for the kits 2666 rating and retest.

Edit: If it's stable at 4.4, just settle for that, you're just hitting the limit on the chip. I didn't realise this or else I'd have stopped you there. You don't need VCCIO that high though, no way. You may find you'll need to tinker slightly with SA voltage to get 2666 stable, but not much. 5820 should be able to do it a touch above stock voltage, so 0.9v total voltage. But every chip is different.

abui1806 · 16 Jan 2015 at 14:50

Silent_Scone said:
Ok, put VCCIO back to auto. Use System Agent voltage in Auto. Apply memory XMP profile, reapply CPU multi, double check DRAM voltage is applied correctly for the kits 2666 rating and retest.

Edit: If it's stable at 4.4, just settle for that, you're just hitting the limit on the chip. I didn't realise this or else I'd have stopped you there. You don't need VCCIO that high though, no way. You may find you'll need to tinker slightly with SA voltage to get 2666 stable, but not much. 5820 should be able to do it a touch above stock voltage, so 0.9v total voltage. But every chip is different.

thank you for your help, so far both of my 5820K cant stable at 4.5Ghz. One is L44 batch, the other one is L41. I may order a couple more with different batches to find a good one that can do 4.5Ghz before I settle down to customised watercooling. Once again, thanks a lot for your help and thank to Andrew as well.

Silent_Scone · 16 Jan 2015 at 14:52

If in doubt always start from scratch

XMP profile with rated voltage, VCINN (input at 1.9v cache in auto and SA in auto for 2666 really shouldn't be too much of an issue as long as the CPU is getting enough vcore. Nice easy overclock for a good chip

abui1806 · 16 Jan 2015 at 14:56

Silent_Scone said:
If in doubt always start from scratch

XMP profile with rated voltage, VCINN (input at 1.9v cache in auto and SA in auto for 2666 really shouldn't be too much of an issue as long as the CPU is getting enough vcore. Nice easy overclock for a good chip

my ram is 2400Mhz so I dont think it is the reason causing instability. Maybe I'm just unlucky when it comes to lottery then. Do you think maybe because of my motherboard? Maybe trying another motherboard could help?

AndrewUK1990 · 16 Jan 2015 at 15:12

abui1806 said:
my ram is 2400Mhz so I dont think it is the reason causing instability. Maybe I'm just unlucky when it comes to lottery then. Do you think maybe because of my motherboard? Maybe trying another motherboard could help?

It could be the limit of the chip. Tbh 4.4ghz is a decent overclock anyway, not sky high but not bad either. If its stable there id settle for that. Even with my water loop my temps can get pretty high @ 1.3v+ and even if i could, i wouldnt want to go any higher. If i was you, if you've tried everything and its still not working above 4.4ghz, id just stick with 4.4 and be happy then watercool if you want just to keep temps down under load.

Think about the real difference between 4.4 and 4.5ghz... its nice to be higher but i for one wont notice a difference in reality!