Thermalright at it again. SLK-900!!
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Thread: Thermalright at it again. SLK-900!!

  1. #1
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    Thermalright at it again. SLK-900!!



    http://www.thermalright.com/slk900.html

    Weight:

    570g (heat sink only; for AMD)
    587g (heat sink only; for Intel)
    Barton 2500+ @ 230*10.5
    Abit NF7

    Watercooled w/ #Rotor block

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  2. #2
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    What the difference between that and the 800? The base looks different and I guess cooling is slightly better?
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  3. #3
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    It weighs more, and it looks like it uses the motherboard mounting holes instead of the clip.
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  4. #4
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    SLK-900
    Technical Spec.:
    Dimension:

    L99 x W59 x H45 (mm) íV Top, without fan
    L67 x W81 x H45 (mm) íV Bottom, without fan

    Weight:

    570g (heat sink only; for AMD)
    587g (heat sink only; for Intel)

    SLK-800
    Technical Spec.:
    Dimension:

    L87 x W56.4 x H48 (mm) - Top, without fan
    L57.5 x W56.4 x H48 (mm) - Bottom
    L25 x W56.4 - Base

    Weight: 505g (heat sink only)




    The 900 is made to hold a 92m fan, and the 800 is made for an 80mm fan.
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  5. #5
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    Originally posted by Nukfutz
    It weighs more, and it looks like it uses the motherboard mounting holes instead of the clip.
    Note that not all motherboards have mounting holes.

    All of thermalright heatsinks are great products. Good job, thermalright!

  6. #6
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    Nice. This is the first HSF for socketA that I have seen use the 4 hole setup. definitely a good idea for an all copper monster.

    I noticed that Intel's weighs more, never thought you'd see the day, huh?
    Give what you cannot keep to gain what you cannot lose.

  7. #7
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    There have been a few others like the Swiftec and Alpha monsters. The only thing I do not care about on this heatsink (and kind of urks me about the 800 and SK-7) is that the heatsink is not as wide as the fan. This heatsink is 59mm wide, but the fan is 92mm. That means only 64% of the fan actually sits over the heatsink. Plus the large motor on the fan is in the midle. That means likely that only about half the airflow is likely going into the heatsink (possibly less. The fins should have gone all the way to the sides of the base at least at 81mm with some of the fins modified for the mounting screws to squeeze between.

    I like my mods I did on a FOP32-1. I spread the fins out to fit an 80mm fan instead of a 60mm fan. The heatsink was 60x72mm and after bending out the fins it is now 80x72. The extra space between the fins allows for lots of airflow. If they had done this with the SLK-900, they could have harnessed all the flow from the 92mm fan and decrease resistance. They could have just drilled through the slanted fins on the sides straite down to the mounting holes. With the heatsink tapering down to the base on all sides it would likely not interfer with anything around the socket.
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  8. #8
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    WoW! what a monster. I have the SLK 800 and it is killer, couldn't imagine needing anything more, but... Geeze how much?

  9. #9
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    Todd a,
    I did the same thing with a vantec model to accomodate 80mm fans. It did really well, I might add. Anyone know how quiet these thermalright thin finners are?
    Give what you cannot keep to gain what you cannot lose.

  10. #10
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    Yes but more fins allow for more dissapation. If they lessened the number of fins, then bended them out to make the hs wider, chances are that it wouldn't cool as well as it does now.
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  11. #11
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    Todd a, did you test the HS before the mod to compare it to temps you received afterward? Just curious if you measured a temp decrease.

    I think an advantage in having the fan overlap the HS is to create moving air currents around the HS. HS that have fans that are the same size or smaller than the top of the HS do just fine in drawing the heat off the HS. However, often when you put your hand on the side of the HS, the air is relatively calm. Unless you have really good case cooling, the hot air from the CPU just hangs around the HS. The overhang might be an attempt to compensate for inadaquate case cooling.

  12. #12
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    There is also a large surface area on the outside edge that you wouldn't benefit from unless there is air blowing on it.
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  13. #13
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    Sure, I just buy a DangerDen Maze3 last night, and then I hear news of a SLK-900 monster that works with the P4, and supports 92mm fans. Those were my two requirements for a heatsink. Oh well, now I'll be on water anyways, and it would have been about the same price probably ($48 shipped from Directron).

    Now that I have the waterblock on its way, I have to attach my 92mm fans on my radiator
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  14. #14
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    RDX,
    I dunno about him, but I saw some improvements. Getting more air to the fins closest to the CPU die helps I guess. I was able to run my 1900 on that old HSF setup, even though it wasn't really rated for it. I think I had an idle 45C, load near 50.
    Give what you cannot keep to gain what you cannot lose.

  15. #15
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    RDX, I used to run the heatsink on my Duron 600@900MHz with a 60x60x25mm 26CFM YS-Tech fan (about 36db and rattles a bit). It ran 38'C full load. I did the mod on a second heatsink (they accidently shipped me two, hee hee). I mod'd one and had it kicking around for about six months until I got my AthlonXP. My temps only went up 4'C going from my Duron 900 to a AthlonXP running at 1.4Ghz. Plus the 80mm fan only runs at 2500 RPM and 30db (34CFM). Every 3db is twice as loud so this thing is 4 times quieter now. Since I still have the Duron I can imediatly tell the differance between the two CPU heatsink fans on these systems. The rattle from the spring clips holdinmg the fan sucks two when it rattles every now and then.

    wrathchild_67, I was talking about leaving the fin could the same and bending the fins to spread them out a little bit so at least the top of the heatsink actually fits the full size of the fan. As the heatsink is right now about 1/3rd of the fan hangs over the sides of the heatsink. With a good chunk of the airflow towards the end of the blades. Like I said they are slapping on a high RPM fan with half the airflo being wasted. If they just did my mod idea ALL the airflow would go into the heatsink and the fin count would stay the same.
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