Thermalright Si 120 or Si 128

[Pixle]

Would just like to know how these stack up...

 

[VinDSL]

Galvanized just bought a SI-128. He'll be able to tell you... 😉

 

[Kakumba]

Havent seen a side by side, but I would say prolly 2 or 3 degrees advantage to the -128. Worth it if the price is about the same. I have a -120 because there wont be any 128s till August.

 

[GalvanizedYankee]

Originally posted by: Kakumba
Havent seen a side by side, but I would say prolly 2 or 3 degrees advantage to the -128. Worth it if the price is about the same. I have a -120 because there wont be any 128s till August.

It will be installed next week, replacing an XP-90Cu. I expect a tad better performance with less cfm/noise. The XP-90 I have is 0.0015" concave, the XP-90Cu is near dead flat, the SI-128 is 0.003"~0.0045" concave. This 3~4 is unacceptable and I emailed ThermalRight my findings/feelings. They offered an exchange. I will just lap the base properly, using none of the silly/stupid advice offered by Lego children of the corn in the last lapping thread 😉 I know and I am tooled to measure and refinish/lap the base of any heat sink. I will only do it if needed.


The ppl of NZ are civilized and big on DIY, so if you wish anything of me Kiwi, a PM will get what I got.

NOTE: http://www.frostytech.com/ might have a comparison chart with the SI-128 listed...Poke around over there, then post your findings. It holds little interest for me today.

NOTE 2: I think the base of the 128 warped because they fitted 8mm pipes into a base designed originally for 6mm pipes. This makes for a thin area by the OD of the pipe. They used the same base because all the mounting hardware would have to have been re-worked to accomodate a thicker base.


...Galvanized

 

[Howard]

On the plus side, that's less material to heat up before the energy makes its way up the heat pipes.

 

[Pixle]

Originally posted by: GalvanizedYankee

Originally posted by: Kakumba
Havent seen a side by side, but I would say prolly 2 or 3 degrees advantage to the -128. Worth it if the price is about the same. I have a -120 because there wont be any 128s till August.

It will be installed next week, replacing an XP-90Cu. I expect a tad better performance with less cfm/noise. The XP-90 I have is 0.0015" concave, the XP-90Cu is near dead flat, the SI-128 is 0.003"~0.0045" concave.


...Galvanized

What do you mean about the concave? Do you think it would affect cooling by much? I wouldn't want to mess with the curvature of the heatsink.

 

[GalvanizedYankee]

Zalman flower type HSs are the only ones I've checked that were dead flat.

Heat spreaders can be dead flat but I have seen several concave (Google it please).
I've had a couple of CPU HSs that were just a tad concave. TIM (Google) will generally
fill these slight voids, pads would fill them the best but paste works better for heat transfer.

If you know how to check for flatness and know how to lap properly none of this is
an issue....Ever.

A combined out of true of 0.003" would requior me to lap. Most sinks and heat spreaders
won't need lapping.

PM Madscientist for details....Oh! He has no profile or PMability. Shucks!
He lapped his sink over beers, football and visting with a friend. Took him four hours, then
he complained.

PM scrawnypaleguy, he can give you the full skinny, now that he has lapped one sink 😉


...Galvanized