Cpu temp with custom loop

[Woofly94]

4 minutes ago, KE2012 said:

What temperature is your room at? But 21 at idle is nothing to turn your nose up about. Also glad to see you've somewhat sorted it! 

Not sure thermostat downstairs says 23c, games room is a bit hotter, I'm not sure I understand your metaphor, do you mean 21c is bad or it's good?, also do you have any idea what temp I should be getting at 100% load?

[KE2012]

8 minutes ago, Woofly94 said:

Not sure thermostat downstairs says 23c, games room is a bit hotter, I'm not sure I understand your metaphor, do you mean 21c is bad or it's good?, also do you have any idea what temp I should be getting at 100% load?

 

 

 

21 will be a very good temperature, but now you think your room is hotter than 23C I'm dubious, as your computer should be hotter than ambient. As for the 100% temp, in intensive games that stress my CPU, I try to have my CPU max around mid 50. If your talking about something like Aaida or P95 FFT's then my CPU likes to run hot, so the 70's- low 80's at times. 

 

Bare in mind though, this is with a OC i5 Haswell which is notorious for bad TIM between the die and the heat spreader, so comparing against my chip is not an apples to apples comparison. 

[Woofly94]

4 minutes ago, KE2012 said:

21 will be a very good temperature, but now you think your room is hotter than 23C I'm dubious, as your computer should be hotter than ambient. As for the 100% temp, in intensive games that stress my CPU, I try to have my CPU max around mid 50. If your talking about something like Aaida or P95 FFT's then my CPU likes to run hot, so the 70's- low 80's at times. 

 

Bare in mind though, this is with a OC i5 Haswell which is notorious for bad TIM between the die and the heat spreader. 

Are you using a custom loop? 80c I couldn't accept that lol, also yeah I'm sure my room is hotter than downstairs 23c unless the thermostat is broken which I highly doubt, I've read somewhere with a custom loop your CPU temps can be lower than ambient temp.

 

Edit, I can go take a picture if you want?

[KE2012]

50 minutes ago, Woofly94 said:

Are you using a custom loop? 80c I couldn't accept that lol, also yeah I'm sure my room is hotter than downstairs 23c unless the thermostat is broken which I highly doubt, I've read somewhere with a custom loop your CPU temps can be lower than ambient temp.

 

Edit, I can go take a picture if you want?

 

 

A custom water loop will never be able to go lower than ambient unless the radiators are in a location cooler than ambient of the computers location. The only way you can go lower than ambient in the same room is if you do 'bong' cooling or LN2.

 

 

As for my temperatures, for small FFT's which stress a CPU in unusual circumstances to maximise heat, you will discover that even your loop will struggle to keep the CPU cool, and bare in mind my CPU is currently OC'ed so it's going to be running hot anyway.  And this is spikes on a quiet fan setting, usually, the CPU is around mid 60's give or take a degree or two. 

[Woofly94]

1 hour ago, KE2012 said:

A custom water loop will never be able to go lower than ambient unless the radiators are in a location cooler than ambient of the computers location. The only way you can go lower than ambient in the same room is if you do 'bong' cooling or LN2.

 

 

As for my temperatures, for small FFT's which stress a CPU in unusual circumstances to maximise heat, you will discover that even your loop will struggle to keep the CPU cool, and bare in mind my CPU is currently OC'ed so it's going to be running hot anyway.  And this is spikes on a quiet fan setting, usually, the CPU is around mid 60's give or take a degree or two. 

I'm sorry but you're wrong? you must be, because my idle CPU is at 20c right now, and the heating is on FULL, it's defo above 20c because I'm boiling in here, I'm not trying to create an argument or call you a liar but it's quite clearly 25c+ in this room and my temps are 20c, how else can you explain this? there's no good saying "your room must not be this or that hot" "your thermostat is broken" blah blah, it quite clearly shows my CPU is lower than ambient temperature, so how can you prove this wrong? I'm genuinely interested as to how my temps are lower than ambient.

 

 

EDIT: as you can see it's 26c downstairs, and upstairs is atleast 3c hotter (http://prnt.sc/e2gxrv), and this is my idle temps (http://prnt.sc/e2gydh), so can you explain this please?

[KE2012]

2 hours ago, Woofly94 said:

I'm sorry but you're wrong? you must be, because my idle CPU is at 20c right now, and the heating is on FULL, it's defo above 20c because I'm boiling in here, I'm not trying to create an argument or call you a liar but it's quite clearly 25c+ in this room and my temps are 20c, how else can you explain this? there's no good saying "your room must not be this or that hot" "your thermostat is broken" blah blah, it quite clearly shows my CPU is lower than ambient temperature, so how can you prove this wrong? I'm genuinely interested as to how my temps are lower than ambient.

 

 

EDIT: as you can see it's 26c downstairs, and upstairs is atleast 3c hotter (http://prnt.sc/e2gxrv), and this is my idle temps (http://prnt.sc/e2gydh), so can you explain this please?

2

 

If we think about this logically its pretty clear why water-cooling can't give you a temperature lower than ambient. 

 

First off, how does water cooling work? The quick answer is heat is transferred from the components into the water, which is then dispersed by the radiators. Is the water in your loop, at start up going to be the same temperature as the air in the room? Yes because the temperature between air and your loop is going to be in equilibrium, is it going to be colder or warmer? No, as that will require an active component changing the temperature of the water. (When you turn the PC on the active component warming the water obviously becomes the PC). 

 

Then the fans on your radiator is blowing air at ambient temperature through your radiators fins, taking heat above ambient away from the rad. Does this allow for lower than ambient temps? Again no, because the air blowing across the fins is at ambient. If your water / hardware temp is somehow below ambient then this would actually warm your PC.

 

So there is no part of your loop which actually has the ability to become cooler than ambient.

 

The reason why you have a discrepancy between your sensors is probably down to two reasons, (A) being the fact that the central heating sensors may not be that accurate due to location in the room, which is the most likely of the two scenarios and (B) one of your temperature sensors is lying / faulty, be that your computers or central heating.