5820k hitting 100c with an H100i

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Hi

I've got a reasonably common setup: i7 5820k with an H100i (x99a motherboard)

With a vCore of 1.29 (just under the "sensible" limit as far as I can tell? And well below the 1.35 limit most people seem happy with) and a multiplier of 45 I'm running at 4.5GHz - my target, although naturally I wouldn't turn down higher. It boots fine (test 1) and I'm not necessarily looking for perfect stress test stability - as long as it can stay alive when I'm playing FSX, I don't care.

When running Prime95, though, the temperature rockets. I see 100c fairly quickly and then I shut it off: I was expecting more like 80c with stability being the issue if I tried to push it any higher! Not 100c and not giving it the chance to prove it's stable :(

Temperatures at (mostly) idle are 25-30c, and around 60c at stock clock under Prime95 load. Does this seem a little high?

My first guess is that I've messed up the cooler installation - I did it well once and then got misled by a fan controller doing 5 beeps and making me think the CPU had a problem, so I re-seated it and it's possible I didn't do as good a job with the thermal paste etc the second time.

Any other thoughts? Could I just have a chip that's not going to be happy at 4.5 with an H100i GTX?

I'll try re-seating again tomorrow and re-trying with a lower vCore to see where I end up, but any thoughts appreciated
 
What temperatures do you get with something like cinebench or a similar video encoding type tests?

Do you have any additional voltages on auto i.e. is it possible things like VTT, VCCSA, VCCIO, etc. depending on which are appropriate for your setup and whatever they are called on your motherboard are getting pushed to extreme levels when the CPU is fully spun up? as these can substantially contribute to heavy load temperatures.
 
Me thinks this is exactly what you are going to see with 6 overclocked cores running prime95, especially versions above 26.6. Even with a H100i.

Try prime95 26.6, the one without the AVX code, which adds more volts, and you should see about 10c less temps.

What temps do you get at stock with it?
 
What rpm is your pump running at? I force my sys fan to 100% so my pump is at max speed.

What temps in FSX?

8pack says prime is a waste of time...I just use aida and Asus real bench.
 
What temperatures do you get with something like cinebench or a similar video encoding type tests?

Do you have any additional voltages on auto i.e. is it possible things like VTT, VCCSA, VCCIO, etc. depending on which are appropriate for your setup and whatever they are called on your motherboard are getting pushed to extreme levels when the CPU is fully spun up? as these can substantially contribute to heavy load temperatures.

I'll try cinebench soon. Yeah I had several voltages on Auto... I've gone through and set them to things that seemed sensible (eg either what they displayed as the "current" in the BIOS, or a reasonable proportion below the stated maximum). I've also dropped the clock to 4.4GHz and it's looking much better with the Prime 26.6 as mentioned by McGraw! Looks like it's either the auto voltages or Prime version... I'm getting 80-85 across all cores in the Prime 26.6 heavy test (76/79/81/81/85/86) which seems more reasonable for a full-load stress test - pretty much in line with what I was expecting/hoping for, as nobody else seems to have run into temperature being the barrier with the 5820k (rather they hit instability around 4.4-4.6 with a voltage of 1.3-1.35v)

What rpm is your pump running at? I force my sys fan to 100% so my pump is at max speed.

What temps in FSX?

8pack says prime is a waste of time...I just use aida and Asus real bench.

Auto from the motherboard I assume. I haven't tried FSX yet - I panicked with the 100c and stopped testing!

Me thinks this is exactly what you are going to see with 6 overclocked cores running prime95, especially versions above 26.6. Even with a H100i.

Try prime95 26.6, the one without the AVX code, which adds more volts, and you should see about 10c less temps.

What temps do you get at stock with it?

I was expecting it to be warm, but from everything I'd seen beforehand temperature didn't seem to be the limit with these chips - most people's OC's seemed to max out on stability at max volts before temperature became a major issue.

The Prime 26.6 thing seems to have made a big difference though - along with dropping a few voltages from Auto to "something Jon thinks is sensible" has dropped the temperatures down into the 80-85c range, which is more what I was expecting with stress testing.
 
I'll try cinebench soon. Yeah I had several voltages on Auto... I've gone through and set them to things that seemed sensible (eg either what they displayed as the "current" in the BIOS, or a reasonable proportion below the stated maximum). I've also dropped the clock to 4.4GHz and it's looking much better with the Prime 26.6 as mentioned by McGraw! Looks like it's either the auto voltages or Prime version... I'm getting 80-85 across all cores in the Prime 26.6 heavy test (76/79/81/81/85/86) which seems more reasonable for a full-load stress test - pretty much in line with what I was expecting/hoping for, as nobody else seems to have run into temperature being the barrier with the 5820k (rather they hit instability around 4.4-4.6 with a voltage of 1.3-1.35v)

Most voltages you can leave on auto but stuff that affects VTT can quickly contribute to temps - usually the recommendation is not to go over 1.2v (preferably lower) for anything that effects that - though you might find with some setups you need more :S
 
Does anybody with this chip have their voltages and clock to hand? Just so I've got a baseline to experiment from?

Prime definitely seems to be a bitch for this CPU so I'll be ditching it: 4.4GHz seems pretty stable whatever I do though, and if that's all I ever get out of the chip I'll be pretty happy... it's nice to see what it can do though.

I'm currently getting ~30-35c idle and 50-60c in a couple of games I've tried, which seems pretty sensible for day to day use: I'm happy with anything up to 75c day to day, with occasional peaks up to 80 or so not being overly concerning

RealBench at 4.4GHz is looking like 80c on the stress test, so that seems about right, I might try to push for 4.5GHz if I can keep it below 85c in the stress test and lower day to day. I'll report back :)
 
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Does anybody with this chip have their voltages and clock to hand? Just so I've got a baseline to experiment from?

Prime definitely seems to be a bitch for this CPU so I'll be ditching it: 4.4GHz seems pretty stable whatever I do though, and if that's all I ever get out of the chip I'll be pretty happy... it's nice to see what it can do though.

I'm currently getting ~30-35c idle and 50-60c in a couple of games I've tried, which seems pretty sensible for day to day use: I'm happy with anything up to 75c day to day, with occasional peaks up to 80 or so not being overly concerning

RealBench at 4.4GHz is looking like 80c on the stress test, so that seems about right, I might try to push for 4.5GHz if I can keep it below 85c in the stress test and lower day to day. I'll report back :)

Hey man,

I have a 5820k at 4.5ghz and here is my config:

x45 multiplier
1.25vcore(stock as I didn't change that)
Clock reported: 4.5ghz

Air cooling: Idle: 33 degrees/ Full load: 47 degress is the max I pulled.

Ambient temp - not sure as I had the heating off.
 
Noted :) thanks

C...Gamble - sounds like you've got a better chip than me! Mine definitely won't do 4.5 on stock volts, I'm still hoping I can get 4.5 with a little more juice though. 4.4 is seeming stable though, which is reasonable.
 
I'm not entirely sure how to check, but the MSI Command Centre thinks it's at 1650rpm? I've set the CPU fan to ramp up to 100% above 65c, though, and I assume that since the pump is attached to that header, that will increase as needed? I've only done that recently though

Edit: a half hour flight in Prepar3d gives me a max of 73c on one core, with the rest at 70 or just under - close enough for government work! I think I'll try the 4.5 again tomorrow if I can get it stable, my original temperature panic seems related to the Auto voltages and Prime being stupid...

Thanks chaps, I'll let you know how I get on
 
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Mine's at 4500rpm. When it was controlled by BIOS it would drop to about your level and struggle to keep up.

If the h100 is similar to the h60 then the cpu fan header should connect to the fans (so they only get louder on processing denand) and the SYS fan header to the pump (which should run full speed all the time)

Use hwmon or Aida.
 
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