Major temperature difference between Corsair H105 and H100i V2? Defect?

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bigblueshock

Weaksauce
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Oct 27, 2017
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I'm comparing temps between a Corsair H105, and a Corsair H100i V2. The H105 has a 38mm thick radiator while the H100i V2 has a 30mm thick. Both are 240mm


The rig consists of these core components in question:
-Asus Sabertooth x79
-Intel Core i7 4930k overclocked to 4.5 GHz on all cores with HT enabled.

To keep everything streamlined, I am testing with RealBench stress test and using the same voltage.

Test 1) 30 minutes of RealBench @ 4.5 GHz on the H105: Temps Range between 50-60C (Maximum). Don't even have to use max radiator fan speeds. I can even do 4.6 GHz with a voltage bump and do low to mid 70's C with no problem.

Test 2) A couple of minutes of Realbench @ 4.5 GHz on the H100i V2: Temps skyrocket to about 85c+. The computer crashes because it isn't able to achieve those clocks at the given voltage for those temps. 100% fan speeds on Radiators.

I re-seated the block 3 times on the H100i V2, once with a different thermal paste. Then I put back on the H105 for good measure. Numbers stayed the same.

I decided to inspect the H100i V2 while at load and check physical thermals. One of the tubes gets really hot. I suppose this means there is a flow from the block to the radiator. At the radiator where the tube connects it gets REALLY hot. That's where it ends. Nowhere else on the radiator does it even get lukewarm.

The H105: The radiator seems to evenly warm up.

Any ideas?
 
I'd have to suspect a defect. I mean yes, the radiator is thicker on the one, but it shouldn't make that big of a difference.
 
Sounds like the pump failed, or is failing.

Since its booting in the OS are you able to launch the corsair link and see if it is reporting the pump RPM (generally a minimum of about 1500-2000rpm)?
 
Yep, pumps dying or theres a blockage. You shouldnt feel much if any difference between the tubing.
 
kirbyrj said:
I'd have to suspect a defect. I mean yes, the radiator is thicker on the one, but it shouldn't make that big of a difference.
Click to expand...

I'm thinking the same. Especially not something I can fix. I've already emailed corsair support.


Spartacus09 said:
Sounds like the pump failed, or is failing.

Since its booting in the OS are you able to launch the corsair link and see if it is reporting the pump RPM (generally a minimum of about 1500-2000rpm)?
Click to expand...

I am. The fans and pump seem to be flowing at correct RPM's, as well as the fans. I even had pump in performance mode, didn't make a difference. (2000 or 3000 RPM I believe?)

hititnquitit said:
Yep, pumps dying or theres a blockage. You shouldnt feel much if any difference between the tubing.
Click to expand...

Yeah one tube is cold, one tube is hot.
 
I agree with what had been said before. Either a pump issue (which appears not to be the case based on your RPM readouts) or some sort of blockage.

The blockage could be a unit defect, or it could be something silly like an air bubble in just the wrign place. Try doing some "case gymnastics*" with the system running to see if it improves.

If that doesn't help, I'd RMA the unit.


(*Same as we do when filling custom loops. With the system running, lean the case 45 degrees to each side, front and backwards a few times to see if it helps)
 
sounds like a blocked tube. I have two corsairs that did that so I refurbed them. yanked the tubes, cleaned the clog, refilled with af and water and retubed.
 
Have you installed corsair link to see which operating mode the pump is in? After a reinstall of windows i didn't understand why my CPU was hitting high 70s and 80s until i did and changed it from quiet to performance. Not saying it's going to help your situation, but it may.
 
Xero717 said:
Have you installed corsair link to see which operating mode the pump is in? After a reinstall of windows i didn't understand why my CPU was hitting high 70s and 80s until i did and changed it from quiet to performance. Not saying it's going to help your situation, but it may.
Click to expand...
He already notated he did that and upped it to performance mode, and it's showing the correct 2-3k rpm.
So its gotta be a clogged system 99% likelihood.
 
pendragon1 said:
sounds like a blocked tube. I have two corsairs that did that so I refurbed them. yanked the tubes, cleaned the clog, refilled with af and water and retubed.
Click to expand...

Interesting. I'll wait and see what they say. It should be RMA'd, but if they give me any issues, I may go that route. What ended up causing blockage. Sediment build up?

Spartacus09 said:
He already notated he did that and upped it to performance mode, and it's showing the correct 2-3k rpm.
So its gotta be a clogged system 99% likelihood.
Click to expand...

I wonder if there's a way to unclog without taking the tubes out. For instance, holding the radiator a certain way or something while its on.
 
Could also be a bad pump. Just b/c the motor is spinning doesn’t mean the impeller is moving water.
 
bigblueshock said:
Interesting. I'll wait and see what they say. It should be RMA'd, but if they give me any issues, I may go that route. What ended up causing blockage. Sediment build up?
Click to expand...
yeah there was a solid white buildup in one of the barbs. looked like calcium/hard water build up but probably not that. im guessing something was cooked out of the af/water mix.
 
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