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What are the worst TIMs?

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And indeed the BLT (as mentioned before: proper application of the TIM) is another major influencial factor if not even bigger, no matter if you have the best or the worst TIM.
Personally I don't like spreading and prefer ball or line simply because it doesn't look nice to me and I've seen a lot worse. Cant help wonder if it's similar to creating a painting, most people cannot produce amazing results and my own would probably be kindergarten level. Also these days see's a plethora of greases. Not sure if there's a quality control issue with some results too.

Here's an old result from some years back using a specially crafted piece of code to produce constant high core temperatures with Haswell. Using a quad core mobile bare die CPU high thermal latency of the waterblock was kept out of the equation using a duty cycle of 50ms on time to measure temp and 950ms off time. Clocks were increased every 3 seconds or so.

old.jpg

The ZF12 is quoted as 12W/(m⋅K) hence the 12 I suppose. At 4.5GHz power is 200W, not bad for a 47W TDP. Actually at 98C a couple of Watts over and at 77C a couple of Watts under, likely due to increased leakage at higher temps. Extrapolating data for PK-1 gives a BLT of 80 microns @ 10W/(m⋅K) or could be 50 microns at 6W/(m⋅K) etc, I don't have a way to measure actual BLT. The GD900 thermal throttled above 4GHz and came from a tub so was spread on the WB while the other two used the line method on the die IIRC. Note that contact pressure is relatively low due to using bare die and not wanting to crack it. IMO should have used delta temperatures really and better still PECI temperature which produces a rolling average of highest temp to 1/64th of a degree.

@TPCEA I might be behind the times but some pastes that might be of interest to you
Code:
Halnziye
HY410    30g     1.93W/(m⋅K)    $1.10  
HY510    30ml    1.93W/(m⋅K)    $0.30
HY610    25g     3.05W/(m⋅K)    $1.30
HY880    1g      5.15W/(m⋅K)    $0.50
HY883    1g      6.5W/(m⋅K)     $0.50

FNE-210  25g     1.93W/(m⋅K)    $1.30

Maxtor
GTG8     4g     12.8W/(m⋅K)     $2.60
CTG9     4g     13.5W/(m⋅K)     $6.40

Subzero seven
LTP-15   10g    15W/(m⋅K)       $4.00 (Liquid Thermal Pad)

The LTP is a paste that is applied and becomes a pad with heat IIRC.
 
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Personally I don't like spreading and prefer ball or line simply because it doesn't look nice to me and I've seen a lot worse. Cant help wonder if it's similar to creating a painting, most people cannot produce amazing results and my own would probably be kindergarten level. Also these days see's a plethora of greases. Not sure if there's a quality control issue with some results too.

Here's an old result from some years back using a specially crafted piece of code to produce constant high core temperatures with Haswell. Using a quad core mobile bare die CPU high thermal latency of the waterblock was kept out of the equation using a duty cycle of 50ms on time to measure temp and 950ms off time. Clocks were increased every 3 seconds or so.

View attachment 342390
The ZF12 is quoted as 12W/(m⋅K) hence the 12 I suppose. At 4.5GHz power is 200W, not bad for a 47W TDP. Actually at 98C a couple of Watts over and at 77C a couple of Watts under, likely due to increased leakage at higher temps. Extrapolating data for PK-1 gives a BLT of 80 microns @ 10W/(m⋅K) or could be 50 microns at 6W/(m⋅K) etc, I don't have a way to measure actual BLT. The GD900 thermal throttled above 4GHz and came from a tub so was spread on the WB while the other two used the line method on the die IIRC. Note that contact pressure is relatively low due to using bare die and not wanting to crack it. IMO should have used delta temperatures really and better still PECI temperature which produces a rolling average of highest temp to 1/64th of a degree.

@TPCEA I might be behind the times but some pastes that might be of interest to you
Code:
Halnziye
HY410    30g     1.93W/(m⋅K)    $1.10 
HY510    30ml    1.93W/(m⋅K)    $0.30
HY610    25g     3.05W/(m⋅K)    $1.30
HY880    1g      5.15W/(m⋅K)    $0.50
HY883    1g      6.5W/(m⋅K)     $0.50

FNE-210  25g     1.93W/(m⋅K)    $1.30

Maxtor
GTG8     4g     12.8W/(m⋅K)     $2.60
CTG9     4g     13.5W/(m⋅K)     $6.40

Subzero seven
LTP-15   10g    15W/(m⋅K)       $4.00 (Liquid Thermal Pad)

The LTP is a paste that is applied and becomes a pad with heat IIRC.
Thanks!
 
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Where would SYY-157 rank on the list of TIMs?
 
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Syy 157 2022 Edition (the original one is great) but this one is by far the worst paste i've ever seen. even 1 dollar per gallon temu goop is better.
 
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@Shrek Well the GD900 result was unexpected so I redid it from scratch a second time and got the same results. Empirical data from extrapolation would put junction case thermal resistance at ~0.2C/W so at 200W a 40C delta Tjc then the PK-1 TIM works out to a 5C delta. If same BLT then ZF-12 would be a 25C delta so 5 times more than PK-1 so 2W/(m⋅K), GD900 calculates to 10.5x so 53C or ~1W/(m⋅K).

The CPU also has a die of L4 cache (Crystal Well) and with the low contact pressure may have contributed unfavorably to the results seen, idk. Perhaps stirring the GD900 wasn't sufficient or didn't spread as thinly but that's what I got.
 
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Last edited:
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Syy 157 2022 Edition (the original one is great) but this one is by far the worst paste i've ever seen. even 1 dollar per gallon temu goop is better.
So the 2022 version sucked for you, but @freeagent swears by it....I wonder what happened?
 

freeagent

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So the 2022 version sucked for you, but @freeagent swears by it....I wonder what happened?
Maybe put it on like peanut butter? Let the cooler do the spreading? Not sure.
 
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Maybe put it on like peanut butter? Let the cooler do the spreading? Not sure.
Yup.

Method to use:
  1. Squeeze SYY on cpu
  2. Spread with included spatula
  3. Smooth with included credit card sized plastic thingy
  4. Wait 15 minutes
  5. Mount Cooler
  6. Rock out with your clocks out.
 

freeagent

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Yup.

Method to use:
  1. Squeeze SYY on cpu
  2. Spread with included spatula
  3. Smooth with included credit card sized plastic thingy
  4. Wait 15 minutes
  5. Mount Cooler
  6. Rock out with your clocks out.
That is exactly how to do it :rockout:

So the 2022 version sucked
I noticed that you laughed at our replies.. how come?
 
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That is exactly how to do it :rockout:


I noticed that you laughed at our replies.. how come?
Something in each of them just made me laugh. Not in a derisive way, just amusement.

I doubt I can even explain why other than my mood at the time, which is better than now because Amazon sucks.
 
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