Does Ambient Temp Make A Difference?

[UnaverageVague]

Setup

i7-7700k OC 4.8ghz (1.235V)

ASUS Strix Z270F Motherboard

NZXT Kraken X62 Water Cooler

 

Okay so I just delided my CPU, and before I did this I was use to seeing max temps of around 74-79C Max running AIDA64 (FPU) with an ambient temp of around 18-20C

 

After I had finished my delid, I was unfortunate that my A/C went out and my house now sits around 30-34C which is like either High 80's to Mid 90's and after doing the same AIDA64 test I'm getting max temps of around 74C (Also my Radiator Liquid Temp was reading 33C, and the CPU was idling at 34-38C, usually I idle at around 29-31C with good ambient temps and before delid)

 

What I'm trying to figure out is do you guys think I could had done a bad delid? Or do you guys think it's cause my ambient temp is too hot? I can't really test it out until Tuesday when the A/C unit gets replaced.

 

I cleaned both the IHS and the die to make sure the silicone and thermal paste was removed completely, I applied a very small amount of Liquid Metal (Thermal Grizzly) not a lot but enough to cover the die completely, I applied I thin layer of RTV Gasket Silicone around the IHS leaving a decent gap at the top of the IHS so heat can escape.

 

*I do understand the gap between the IHS and Die is important but with the amount of RTV gasket I applied it shouldn't be an issue, even with the alignment tool pressed down for 6 hours barely any squeezed out which indicates it was pretty thin (Finger tight pressure was applied when using the alignment tool)

 

Sorry I forgot to take a picture of the paste and silicone application but these pictures will show here was no damage to the Die and that there was no Silicone left on the Chip & IHS

[Lurick]

Ambient temps are pretty much the lowest you can go for standard cooling, they also will have an impact on the temperatures since if it starts out hotter then the delta will be higher.

[Jurrunio]

surrounding temps can make a big difference. The higher the temperature difference, the better the cooling.

[Cookybiscuit]

Ambient temps and your PC's load temps scale perfectly, it's the reason you'll often see in reviews that temperatures are given as degrees over ambient. Assuming fan percentage stays the same, a 10C ambient increase will cause a 10C CPU temp increase, for example.

[UnaverageVague]

1 minute ago, Cookybiscuit said:

Ambient temps and your PC's load temps scale perfectly, it's the reason you'll often see in reviews that temperatures are given as degrees over ambient. Assuming fan percentage stays the same, a 10C ambient increase will cause a 10C CPU temp increase, for example.

So since my ambient temp is now 20+ degrees hotter than I'm use to having it at, I'm showing a 20+ degree increase? So I probably did achieve the 20C drop with the delid but I won't be able to tell till I get the A/C fixed?

[Lurick]

1 minute ago, xovague said:

So since my ambient temp is now 20+ degrees hotter than I'm use to having it at, I'm showing a 20+ degree increase? So I probably did achieve the 20C drop with the delid but I won't be able to tell till I get the A/C fixed?

If your ambient temps went up by 20C then your max and min temps will go up by 20C.

So once you get the AC fixed and remove that 20C increase in ambient temps then you'll probably see temps around 54C

[Cookybiscuit]

Just now, xovague said:

So since my ambient temp is now 20+ degrees hotter than I'm use to having it at, I'm showing a 20+ degree increase? So I probably did achieve the 20C drop with the delid but I won't be able to tell till I get the A/C fixed?

Pretty much. 

[Bananasplit_00]

to find out if you did it good take the CPU temp - ambient temp and do it for both before and after temps. to compare CPU temperatures you should calculate it like that because the ambiant has an impact

[UnaverageVague]

1 minute ago, Lurick said:

If your ambient temps went up by 20C then your max and min temps will go up by 20C.

So once you get the AC fixed and remove that 20C increase in ambient temps then you'll probably see temps around 54C

Beautiful okay well I guess I'll find out 100% on Tuesday I appreciate the help just was a little worried I had done something wrong with the delid, I'm kind of out of liquid metal so I just wanted to make sure before I ordered more to try the delid again.

[UnaverageVague]

1 minute ago, Bananasplit_00 said:

to find out if you did it good take the CPU temp - ambient temp and do it for both before and after temps. to compare CPU temperatures you should calculate it like that because the ambiant has an impact

I only ran AIDA64 for like a minute just to see what it would hit, but once I get the ambient down and run the test I'm sure I'll see the results I'm looking for with the delid

[manikyath]

questions like these is why we should stop using temperature as a cooler performance metric, but rather should use the temperature delta over ambient. if ambient goes up by X °c, your temperature measurements will go up by X °c. the delta between ambient and measurements will stay the same however.

 

you can "cancel out" changes in ambient temperature by measuring ambient while measuring the other stuff, and then just substracting ambient temperature to get your delta, and at the end of the ride just comparing the delta's.

 

the fact this question keeps popping up means there's a problem with how we use these metrics.

[UnaverageVague]

36 minutes ago, manikyath said:

questions like these is why we should stop using temperature as a cooler performance metric, but rather should use the temperature delta over ambient. if ambient goes up by X °c, your temperature measurements will go up by X °c. the delta between ambient and measurements will stay the same however.

 

you can "cancel out" changes in ambient temperature by measuring ambient while measuring the other stuff, and then just substracting ambient temperature to get your delta, and at the end of the ride just comparing the delta's.

 

the fact this question keeps popping up means there's a problem with how we use these metrics.

I understand what you mean but when it comes to delidding you can get any C drop from 10-20C I also didn't expect the A/C to go out, so it's hard to calculate where I should be around and to determine if I had a successful delid or not. Right now it's still on a hunch of what my improvement will be for my delid until the proper testing can be done.

 

I took in account that I was receiving 74-78C before delid with an adaquate ambient temp, but with delidding I had no idea if this was good to see with a high ambient or not, I somewhat expected higher temp readings because of my ambient temp but I wanted to make sure this wasn't a delid issue.