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H100 and Ivy Bridge

post #1 of 3
Thread Starter 
Good afternoon,

I apologize if this is in the wrong place, as I know the H100 isn't real water cooling, but I just wanted to share my experience with the cooler, and see if I'm doing something wrong. I never knew why there was so much negativity toward the H100 because it always cooled my i5 3570K real well:

4.6GHz, 1.37v in bios, 1.35v under load: 83C on the hottest core after an hour in Prime95, 25C ambient.

I just recently upgraded to an i7 3770K (not because I needed it, but because I got a great deal). I think I can understand now why there is some frustration. I cleaned and prepped the surfaces real well, using 91% isopropyl alcohol and coffee filters, and replacing the TIM with Arctic Silver 5, using the pea method. My new results with the i7:

4.5GHz, 1.27v in bios, 1.25v under load: 88C on the hottest core after an hour in Prime95, 25C ambient.

So now I have a lower frequency with lower voltage, and it's getting hotter? Why is this? A couple questions:

Could my choice of TIM make such a huge difference? I'm talking like 10C. I'm thinking maybe the AS5 hasn't cured yet, but I don't think it's going to make a 10C difference. I'm not going to go through the trouble of using a different TIM if I just have a hot running chip.

Does Hyperthreading make the chip run that much hotter?

Any other advice? Suggestions?

As always, thanks in advance. Everyone here is so helpful and that's why I love reading these forums.
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Mine
(15 items)
 
HTPC
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CPUMotherboardGraphicsRAM
i7 4790k 4.6GHz @ 1.20v MSI Z97M Gaming MSI GTX 1080 Founder's Edition 16GB Corsair Vengeance DDR3 2133MHz 
Hard DriveHard DriveCoolingOS
Samsung 840 EVO 500GB SSD WD Caviar Blue 1TB HD Corsair H100i v2 Windows 10 Pro 64-bit 
MonitorMonitorKeyboardPower
Qnix QX2710 Evolution II 2560x1440 96Hz Acer Predator XB270HU Logitech G710+ Coolermaster Silent Pro M 850W 
CaseMouseAudio
Corsair Carbide Air 240 Logitech G600 MMO Logitech G230 
CPUMotherboardGraphicsRAM
Intel Pentium G3258 MSI Z97m Gaming EVGA GTX 750ti Kingston HyperX Fury 8GB 
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Sandisk 64GB SSD Corsair Force GT 90GB Coolermaster Hyper 212 Evo Windows 8 Pro 
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post #2 of 3
You may have had an i5 that was not to bad between the IHS and the DIE and maybe now you have an i7 that isn't so great there. You could de-lid it.

As for the hyper-threading just turn it off then run your temps and then turn it back on and compare... that will answer your question about the hyperthreading.

I can't speak for the 2nd or 3rd gen i7s but on the i7-920 turning hyperthreading on was as much as a 10c difference and required more voltage. I don't think it is that big of a deal on the newer CPUs but someone else needs to answer that question or like I said you can answer it yourself.

You may just need to take the block off then put it back on and reapply the tim.

I'd de-lid though...
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RAMHard DriveCoolingCooling
ballistix ddr4 dual channel Samsung 850 EVO 500GB DT 5noz CPU Waterblock XSPC Razor Full Cover GPU Block 
CoolingCoolingCoolingCooling
XSPC Razor Full Cover GPU Block 4x120 Black Ice Xtreme GTX480 Swiftech MCP655 Danger Den Monsoon Pump/Reservoir 
CoolingOSMonitorKeyboard
Corsair Link Fan Controller Windows 8.1 Nixeus 2560x1440 Logitech G15 
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Kingwin PF-850 Ttesports Level10M Razer Vespula Sennheiser HD590 
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post #3 of 3
The short answer is yes, Hyperthreading adds about 10C which is completely normal.

edit: 10C for sandy anyways..
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