Nice thread with lots of information. I haven´t touched the aircooling market in 2 years so i am a n00b in this area.
I have read several reviews and reports from you guys that Thermalright is the way to go. But, Whats the difference betweeen 900U, 900A, and finally 947U?
Are they basically the same heatsink? I am looking for a heatsink for a friend and i have a million fans already but i just want a good heatsink out of theese 3. Which one is the most expensive/cheapest normally? Does the more expensive one cool better than the cheapest out of those?
BTW: I will be looking at the 900U and the 947U.
I do not feel safe using the 900A as it weighs 550 grams.
Occasionally I attend a LAN party.
And I wouldn't be pleased if the 900A jumped of the socket and crushed everything inside the case.
900a it is then. I'm sick and tired of bolts through the mainboard, even my new blocks doesn't use bolts. The computer in question will not move at all so that clip should be safe.
If i use a 92mm fan, is the fan to big for the sink so that the fan actually blows around the sink in any way? A 92mm at 7 volts must be a winner.
The board it will fit on is my old and trusty KX7-R, would it be any problem on that board? I know, i can check the specs, but i want a general view as well.
Thanks again,
Mac
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Geeky1University of the Pacific (Stockton, CA, USA)
edited November 2003
The SLK-900A is like 55mm wide, Mackanz. So yeah, a 92mm fan will have tons of air that's not going anywhere important, but it works just fine anyhow. With 119CFM of 60*F air going through it, an SLK-900A will handle ~150w (CPU temperature @ 115*F full load)
That's one of my points in this as well actually. The good results from this sink, can´t it be that the fan actually blows air directly to and/or around the socket itself? If you installed a 60mm fan with the same flow as a 80mm has, would you get better with the 80mm or the same? If not the same, i'd say that the results has to be taken with a grain of salt.
I see now that the smallest fan supported is 70mm so we won't know for sure but i am very suspicious.
The problem with a 60mm fan will be extreme noise if you want it to push as much air as an 80mm
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Geeky1University of the Pacific (Stockton, CA, USA)
edited November 2003
Mackanz, you CAN put a 60mm fan on it (use the 70mm brackets, don't put the little "U" in the wire into the fan holes tho; use them to hold the fan in place), but you can't attach it securely.
EQuito had this to say The problem with a 60mm fan will be extreme noise if you want it to push as much air as an 80mm
I didn't say i was going to, but i just questioned the real truth about these heatsinks in general. I would love to test and see though. Cause if i put a fan and blow it onto the socket, i will have lower temps even if the core isn't getting any colder if you know what i mean. Same thing if you have a fan blowing on the back of the socket.
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Geeky1University of the Pacific (Stockton, CA, USA)
edited November 2003
uh... Mackanz, most reasonably modern boards report the CPU diode temperature, not the in-socket temperature.
Mackanz had this to say I didn't say i was going to, but i just questioned the real truth about these heatsinks in general.
Mac, believe me when I say this HS is awesome.
I defended my PAL8045 because it was the best for me until I got this HS.
There is no doubt in my mind you'll see at least 6c drop with an 80mm fan like a Mechatronics.
Geeky1 had this to say uh... Mackanz, most reasonably modern boards report the CPU diode temperature, not the in-socket temperature.
Doesn't actually matter but that's not the point.
I still believe it's a great sink fellas, but i do think it is slightly overrated considering what i described with the air outside the socket thing. If i blow cold air onto the onboard sensor (not the cpu), the core temperature will also be lowered according to bios and mbm which it shouldn't. Getting my point now?
Only a real probe VERY near the core could tell for sure.
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Geeky1University of the Pacific (Stockton, CA, USA)
edited November 2003
I don't see how you're blowing cold air onto the thermistor, tho. The thermistor is smack in the middle of the cpu socket, under the CPU. No meaningful amount of air is going to get under there.
You are correct, but the thermistors "ambient" if i can call it that is colder thanks to that i am blowing cold air on it's surroundings. Try it and see it for yourself. A fan on the back of the mainboard have always given colder cpu temps.
Comments
But, if you like V8s, maybe <a href="http://www.headroomx.de/english/mods/amdbigblockv8/index.htm">this</a> should be your next mod
That was great!
I have read several reviews and reports from you guys that Thermalright is the way to go. But, Whats the difference betweeen 900U, 900A, and finally 947U?
Are they basically the same heatsink? I am looking for a heatsink for a friend and i have a million fans already but i just want a good heatsink out of theese 3. Which one is the most expensive/cheapest normally? Does the more expensive one cool better than the cheapest out of those?
TIA,
Mac
900A use a clip
900U use screws
900A and 900U is the same HS
947U is the 900U with minor changes in design.
That is the short version.
EDIT: Found a link with a direct comparison between 900U and 947U.
http://www.pcabusers.com/reviews/thermalright/slk947u/p2.html
BTW: I will be looking at the 900U and the 947U.
I do not feel safe using the 900A as it weighs 550 grams.
Occasionally I attend a LAN party.
And I wouldn't be pleased if the 900A jumped of the socket and crushed everything inside the case.
MUCH appreciated! Good man.
If i use a 92mm fan, is the fan to big for the sink so that the fan actually blows around the sink in any way? A 92mm at 7 volts must be a winner.
The board it will fit on is my old and trusty KX7-R, would it be any problem on that board? I know, i can check the specs, but i want a general view as well.
Thanks again,
Mac
See other thread for more info.
http://www.short-media.com/forum/showthread.php?s=&threadid=5643&highlight=Mech
It's 60mm wide. Anything larger than that will have some overflow air going down the sides of the heatsink.
The smallest fan it supports is 70mm.
I see now that the smallest fan supported is 70mm so we won't know for sure but i am very suspicious.
Thanks!
I didn't say i was going to, but i just questioned the real truth about these heatsinks in general. I would love to test and see though. Cause if i put a fan and blow it onto the socket, i will have lower temps even if the core isn't getting any colder if you know what i mean. Same thing if you have a fan blowing on the back of the socket.
I defended my PAL8045 because it was the best for me until I got this HS.
There is no doubt in my mind you'll see at least 6c drop with an 80mm fan like a Mechatronics.
Doesn't actually matter but that's not the point.
I still believe it's a great sink fellas, but i do think it is slightly overrated considering what i described with the air outside the socket thing. If i blow cold air onto the onboard sensor (not the cpu), the core temperature will also be lowered according to bios and mbm which it shouldn't. Getting my point now?
Only a real probe VERY near the core could tell for sure.