Adding a 120/140 rad at rear.

robmac65

robmac65

robmac65

Associate
Joined
1 Jul 2014
Posts
60
What difference if any will i notice in temps adding another 120/140 rad and fan to my existing 360 & 240 rads.

Am running a EK Water Blocks EK-D5 Vario X-RES 140, so the pump should cut it.
 
What components are you cooling?
It will depend on how much heat you currently have going in tp the loop, but it is roughly an extra 15% cooling capacity you are adding, so if your water temps are currently 10c above ambient then you are looking at 1c off that, if you are running at 20c above ambient then maybe 3-4c
 
It is a FX8350 and a R7990, when it is idle or just browsing the temperature is approx 12c on the Cpu and 32c on the Gpu the room is roughly 23c, when it is doing nothing the Cpu is about 6c, its when i am hammering Boinc that the Cpu ramps up to about 55c and the Gpu to approx 60/61c that I want to get lower.
 
The HWMonitor is reporting the Cpu at those temps, i do not own a probe for the res, can 5 fans on the rads not drop the temp below ambient?
 
robmac65 said:
The HWMonitor is reporting the Cpu at those temps, i do not own a probe for the res, can 5 fans on the rads not drop the temp below ambient?
Click to expand...

no, fans can never drop the water / CPU temp below ambient, you'd need a water chiller to do that

you can pick up a film temp probe for a couple of quid and tape it to a metal fitting, it'll be within a degree of the actual water temp, get 2 to measure ambient as well

you won't know if it's worth adding a rad until you know what your water temp is in relation to ambient and whether your water temp creeps up too much over time
 
Last edited:
you already have temp sensors

http://www.aerocool.us/peripheral/xvision.htm

look at the pics - tape one of the sensors to any metal fitting in the loop, that will be just as good

with everything at idle your water temp should be basically the same as ambient... on load it should be a max of about 10C greater than ambient (it should take a good few minutes to start climbing as well), if it gets higher than that then yeah it could be worth adding another rad

if your ambient temp near the rads is 31C and your room temp is 23C then it sounds like you could do with either running open case or improving case airflow, rather than fitting another rad
 
Last edited:
Seriously I can't believe I forgot I had them until last night when you asked what my case temp was :(.

I had just wrapped them round each other and shoved them in a 5.25 bay out of the way!!

Ok right now the in case temp is 29c the water is showing at 32c and outside the case is 26c whilst I am doing this on the web, when I was doing nothing the in case was 29c and the water was 29c, the cpu temp is being reported by HWMon @ 12c though and the Gpu is at 41 & 40c, when not surfing the Gpu is reporting 0c and 31c that's because of the AMD drivers cutting the power to one of the cores in idle.
 
Unless I'm being an idiot and it's happened before, there's something wrong with HWMon readings you're getting. How can the cpu be 12c when the water is 29c, even with zero load they would be the same. This also applies to the gpu, even switching a core off cannot lower it below the temp of the water that is flowing over it.

Is this delta temps over the water temp? I'm confused. :)

Interested as a few times I've thought of adding a 120/140 to the rear.
 
My coolant temp is usually a degree or two above ambient on idle, and maximum 10 degrees above ambient on full load for long periods.

In my opinion, you have heaps of head room if you are only cooling a CPU and GPU with 600mm of combined rad space. Spend your money on something that will make a difference instead!
 
robmac65 said:
Seriously I can't believe I forgot I had them until last night when you asked what my case temp was :(.

I had just wrapped them round each other and shoved them in a 5.25 bay out of the way!!

Ok right now the in case temp is 29c the water is showing at 32c and outside the case is 26c whilst I am doing this on the web, when I was doing nothing the in case was 29c and the water was 29c, the cpu temp is being reported by HWMon @ 12c though and the Gpu is at 41 & 40c, when not surfing the Gpu is reporting 0c and 31c that's because of the AMD drivers cutting the power to one of the cores in idle.
Click to expand...

Run Heaven or something to tax the GPU's and check the ambient and water at 15 minute intervals up to an hour

There is definitely something wrong with the CPU temps being reported
 
Been running Collatz Conjecture on the Gpu for roughly 5 hours and the in case temp is now at 33c (the Gpu is reporting 58c and 58c on the cores) and the water is at 43c so that's 10c delta cpu is reporting 44c on the HWMonitor, still do not know why it reports lower than ambient on the cpu when it's idle though, outside case is at 25c.

So I probably don't need any more radiators then???
 
Last edited:
robmac65 said:
Been running Collatz Conjecture on the Gpu for roughly 5 hours and the in case temp is now at 33c (the Gpu is reporting 58c and 58c on the cores) and the water is at 43c so that's 10c delta cpu is reporting 44c on the HWMonitor, still do not know why it reports lower than ambient on the cpu when it's idle though, outside case is at 25c.

So I probably don't need any more radiators then???
Click to expand...

If you've had the GPU at 100% for 5 hours and your fluid is at 43c with a 25c ambient, then that is perfectly normal.
 
You must log in or register to reply here.
Back
Top Bottom