High temperatures and RPM with Rosewill RCX-Z775-LP cooler.

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Xander Konrad

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Im hitting a high of 52c on idle with a pentium g3258 at idle, the rpm is at around 2311. The reviews I see with this thing suggests this is not normal in any sense. I used the stock thermal paste, it is securely fitted with no wiggling.
 
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geofelt
Newegg says the cooler is compatible with lga1150, you are good there.

I have a G3258 in a backup/experimental pc.
Initially, I installed the stock cooler and overclocked to about 4.0.
Under load, the cooler got very noisy and the temperature reached 85c.
I can't remember the idle temperatures, but they were not alarming.
I since have used a better cooler which gives me 30-33c. at idle.
One thing to check is what your multiplier and vcore is at idle.
If you are not using speedstep which will lower the multiplier when there is no work to do, you will be running at 3.2 and the associated vcore. It is the vcore that drives the temperature. At idle, my vcore is about 0.725 and the multiplier is at 8. Use cpu-z to check.

Looking closely...
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geofelt

geofelt

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I don't think the rosewill cooler is as effective as the intel stock cooler.
Your idle temps with the stock cooler should be about 15c. over ambient.

One common mistake is to use too much paste which will act as an insulator.
One small drop is sufficient, it will spread under pressure and heat.
 
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Xander Konrad

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I ended up using the stock thermal paste, was that a wrong decision? I don't think that it could have made this much of a difference.

 
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geofelt

geofelt

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The paste makes little difference.
If applied badly, there can be a big impact.
Looking at the rosewill cooler, it looks puny with a small fan.
I would judge the stock intel cooler to be superior.
The intel cooler will have paste pre-applied. It looks like three small grey strips.
I would highly recommend investing in a cheap $30 tower type cooler with a 120mm fan.
It will run quieter and cool better when overclocking.
If you buy a G3258, it is silly not to overclock it.

If you ever remount a cooler, use alcohol to remove all the old paste before applying new.

 
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Xander Konrad

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I have no clearance in this build, it needs to be this small. This is a home office pc and does not require overclocking, otherwise I would agree with you on the need to overclock.
 
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Xander Konrad

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The case is a inwin bm 369, i would have clearance if it wasent for the OD laying on top of everything. Here is the build for you to take a look at. http://imgur.com/a/Txntf
 
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Xander Konrad

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I have about 15-20 mm. But this cheap Roswell is supposed to be alot better then 53c, all the reviews say around 30 is the normal.
 
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geofelt

geofelt

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The reviews will be on an open test bed.
In a case, you need some airflow.

Do you get that 52c. temperature with the case cover off?
A single 80mm exit fan will not move much air, and it will be very noisy while doing it.
I assume that your fan is mounted as an exhaust fan. The objective is to get heat out of the case.
Can you possibly fit another in there nest to it?
Noctua makes some good 80mm fans:
http://www.newegg.com/Product/Product.aspx?Item=N82E16835608006
I think the intake area on the top of the case and the rear should be adequate.
 
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Xander Konrad

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I did get the temp with the case off, It has an exhaust vent for the cpu cooler thankfully. I have a SilentX 80mm fan in there which is actually doing a good job at cooling the mobo. I have some news on the comparability of this processor/mobo with the cpu cooler. PCpartpicker says they are incompatible. But the cooler fit fine in the mobo, could it no be covering the processor all the way? Here is my component list.

http://pcpartpicker.com/b/6FKZxr
 
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geofelt

geofelt

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Oct 9, 2006
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Newegg says the cooler is compatible with lga1150, you are good there.

I have a G3258 in a backup/experimental pc.
Initially, I installed the stock cooler and overclocked to about 4.0.
Under load, the cooler got very noisy and the temperature reached 85c.
I can't remember the idle temperatures, but they were not alarming.
I since have used a better cooler which gives me 30-33c. at idle.
One thing to check is what your multiplier and vcore is at idle.
If you are not using speedstep which will lower the multiplier when there is no work to do, you will be running at 3.2 and the associated vcore. It is the vcore that drives the temperature. At idle, my vcore is about 0.725 and the multiplier is at 8. Use cpu-z to check.

Looking closely at the rosewill cooler, I see what looks to be some thermal paste pre applied.
If you added your own on top, that will be the problem.
The cooler looks absolutely puny. I really think it needs to be changed out.
Of course, that will add an expense that you might not want.

52c. is not bad, what matters is what you get under load. The cpu will run without throttling up to about 100c.
If it gets that hot, it will downclock or shut down to protect itself.
What will be annoying is the small fan running at 2600rpm.
Are you certain the fan is spinning?


If you remount the cooler all the old paste must be removed first before reapplying paste.
A common problem with pushpin mounts is not getting all 4 pins completely through the motherboard and locked. The key is to push down on diagonal corners simultaneously when mounting.
If they are off, the cooler will not sit properly and give good contact.
Can you look at the back of the motherboard and verify?
 
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Xander Konrad

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Apr 15, 2014
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The normal temp for this cooler is about 35c average, which is what it's supposed to be. 50c totally doable but im reading in some places that this cooler is not compatible with my processor and I'm wondering if it is not covering the processor completely. My v-core fluctuates in between .717 and 1.027 quite sporadically. very back and forth.

I didn't add any to it, and although it loks tiny the reviews say that it works just fine. I might change it out if i send it back. I'm thinking about that noctua but I dont have any budget to work with, is there any other low profile coolers you suggest that are cheap? Also, the fans are spinning.
 
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geofelt

geofelt

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Oct 9, 2006
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Your vcore numbers are good and should not trigger increased heat.
I think there is something wrong with the mount.
Have you looked at the back of your motherboard?
You need to verify that all 4 pins are through the motherboard and locked.
This is a common mounting problem with the stock intel cooler, and yours has the same mount.
When you mount, you need to push down on diagonal corners at the same time, or the mount will not be square.

Of course, you can just live with a hotter chip.
The risk is that under load, your cpu will downclock to reduce the temperature.
 
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Xander Konrad

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This is actually what was the problem, i had trouble with the push pins. It's all good now actually, thank you very much for your extensive help :)
 
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