Phenom 955 with h100i High temps

Blaal Ahmed

Honorable
Oct 25, 2013
2
0
10,510
Hello there i have a problem with my H100i its running hotter then expected. I have upgraded from the Xigmatek Dark knight S1283v.

First problem is the water temp is low but CPU temp is much higher by 15c at load how can this be lowered?

Secondly would this cooler be enough to cool a 8350 as im looking to upgrade to that in next 2-3days with Sabertooth 990fx gen r2.0 and crossfire with another 7850?

Third and final one promise!!.... The cpu wont o/c over 3.7 not even by 201 on FSB no matter the voltage or multi how can I o/c it a little bit more any tricks, wanted 4ghz out of this I know it sounds optimistic

15Min idle quiet profile
890 RPM first fan
907 RPM second fan
Cpu temp 30.9
H100i temp 23.5

15Min idle maximum profile
First Fan 2538RPM
Second Fan 2536RPM
Cpu Temp 27c
H100i temp 21.7c
21c86sm.png


16Min load prime 95 maximum profile
First Fan 2506RPM
Second Fan 2507RPM
Cpu Temp 40.1c maxed at 43 but hovered 40-41 most of time
H100i temp 25.7c

20uwg2g.jpg


Don't know ambient temp but know its very cold wind blowing and raining a lot in UK also window was opened at all times!

At all times the rad was cold to touch and was blowing cold air out the top this indicates its not seated correctly?

When I had radiators on yesterday at home the h100i was blowing hot air out top also felt slightly hot to touch and temps stayed 45-46 due to thermostat at home being set to 26c

For comparison the h100i on stock TIM was running 45-46 max but replaced with MX-4 seems to have dropped.

Current Hardware if this helps.
Motherboard: MSI 770-c45
Ram 2x1gb @ 1066 running at 1333 MHZ and 1x2Gb 1600mhz running at 1333mhz, Ram timings 9-9-9-24 1T

CPU: Phenom 955 BE c2 @ 3.7 ghz
Cpu Oc: 1.4750 Cpu VDD Voltage, x18.5 Multi, Nb frequency x11 = 2200mhz and Ht link speed 2200 mhz... Running stable 12hr Prime 95 top temps 61c *was with Xigmatek Dark Knight s1283v*

Gpu: Sapphire dual x oc ed 7850
GPU Oc: Using MSI afterburner to bump voltage to 1.225mV and sapphire trixx to oc 1300 Core 1275 Memory stable using all MSI Kombuster tests. load temp 57c

Case Haf 922
h100i mounted at top with fans in exhaust mode.
Side 120m fan thats come with case as exhaust
front 200m fan as intake
side 200m fan as intake
Bottom 120m fan as intake

Psu sucking air from bottom and blowing out does not affect case airflow. All wiring behind the motherboard with extensions so its clean.

Internet Bt Infinity Op2 running at 85down 8.43 Up 10ms ping
 
The h100i temps come from a sensor sitting on the metal water block off to the side. these temps will always be lower because the core temps are taking within the cpu it self. Some of that heat is lost on the way into the heat spreader then the block it self(and the liquid cools the block).

Your temps do not look bad to me.

As for the clock speed, it depends on the cpu. All are different. It is an average clock for those chips.
 
I do not think this is the case.

The sensor is way off on the side of the cold plate. That section will never rise as fast as the cpu temperature because the liquid takes the heat away faster than the copper block can even out for temperature.

This image from PCPER.com shows that the sensor is not even in the liquid it self it is off to the side
01-pump-assembly-whole.jpg


Think about this as the same way the sides of a frying pan are not as hot as the center that is over the heat source.
 

Jake Wenta

Honorable
Mar 13, 2013
696
1
11,160
One thing I'd like to note is the water temperature has to be cooler than the CPU, or it wouldn't be cooling the CPU. It has to take the heat away and get cooled from the heat dissipating in the radiator and cycling back to take heat from the CPU again.
CPU-Constant current going through it heating up. Water, constant cycle being cooled and grabbing heat.

What matters is the CPU temp. I went from stock 8120 cooler at 3.2ghz 233 bus stock voltage and high LLC, to x60 4.55ghz 233bus 1.406v. The temp was 62 at load on stock, at 52 at load with x60 at a higher freq and voltage.

2Hours of Torture Test:prime95.
Kraken x60 Water Temp-40*C
CPU Temp-54*C
(I use Tuniq TX-4 Extreme Paste, not stock)

Overclocking varies too. One chip overclocks different from another. And same goes for motherboards, some tend to overclock much better than others.
If you go with a 8350, not sure if you're running 64bit. But maybe upgrade to dual channel 4gb? 2x4GB at 1600+ (Some good deals going on, and some more to come *Black Friday*). It tends to run better with two RAM over 3.

Another thing. If you want a 8350, you need another motherboard-yours is a AM3 socket, 8350 is AM3+.
And if you change motherboards and have an OEM License, you need to buy another operating system. (Which, if you don't have windows 8/8.1, it'll be a good time to upgrade, since gamers experience 10+FPS boost from upgrading).
 

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