Archived from groups: alt.comp.periphs.mainboard.asus (
More info?)
In article <ocr0a15763i5kh8aehast60aiu5j9n1m4u@4ax.com>, "_|_|_"
<_|_|_@nomail.org> wrote:
> On Fri, 03 Jun 2005 09:01:34 -0400, nospam@needed.com (Paul) wrote:
>
> >In article <7r7v91toej719tomcn3ong6hg2sruo5f10@4ax.com>, "_|_|_"
> ><_|_|_@nomail.org> wrote:
> >
> >> I'm currently using Northwood 3Ghz CPUs in P4T-E and P4C800-E.
> >> I'm trying to figure out the tradeoffs between various models of
> >> 7000 series and 7700 series coolers. Also between Cu vs CuAl.
> >> The primary objective is to lower the noise level.
>
> >From the zalman.co.kr web site:
> >
> >7000AlCu 0.22-0.29C/W 18-27dB noise
> >7000Cu 0.20-0.27C/W
> >7700AlCu 0.21-0.28C/W 20-32dB noise
> >7700Cu 0.19-0.24C/W
>
> I hadn't seen that particular spec, but I knew roughly where
> everything fell. I did look for compat. info on the ZalmanUs site
> but didn't find either Asus.
>
> The 7700, with a bit more cooling, would seem to allow downward
> adjustment of the fan. But it doesn't look like it would get down to
> the 7000's dB level.
>
> >Using a 100W processor, fan at full speed, the worst of the above is
> >3C warmer than the best of the above. A 3.06Ghz processor is 82 watts.
> >0.22 * 82 = 18C rise.
> >
> >Mechanical clearance:
> >39mm height 7000 = 55mm radius, 7700 = 68mm radius
>
> I haven't had a chance to see either cooler in person, but
> the 7700 just seems huge when envisioned within any
> motherboard layout. I guess that's another product intended
> for radical overclockers.
>
> >P4T-E (use a drawing tool, import mobo picture, overlay heatsink radius)
> >
> >Both solutions pass over the RAM, so the RAM, when sitting in the
> >socket, must be less than 39mm (1.53"). The 7000 blocks one slot,
> >the 7700 blocks two slots, so removal of the RAM with the heatsink
> >in place might be a problem. I have no idea how tall your RAM is.
>
> The Rambus sticks get to 1-3/8" to 1-1/2" above the motherboard.
> Close!
>
> Good point about swapping RAM! That hadn't occurred to me.
> Ordinarily I wouldn't worry about it, but I've been intending to
> replace two 256's with 512's so I can get 2Gigs in this machine.
>
> I've turned up some stories of damage to circuitry/processor during
> installation of Zalmans. I took that to mean they're hard to press
> into place. Or maybe careless installer. In either case, I want to
> keep uninstalling/reinstalling to a minimum.
>
> >The 7700 passes over the rear connector stack, and also passes over
> >top of the Northbridge. So the connector stack and the Northbridge
> >heatsink have to be less than 1.53" high.
>
> Those both seem to clear comfortably. Impressive to envision this as
> the smaller of the two heatsinks though. I think the 7000 vs 7700
> choice is clearly decided.
>
> >P4C800-E (import mobo picture, overlay heatsink radius)
> >
> >The 7000 fits, because that is what I use. The 7000 just passes over
> >the edge of the Northbridge heatsink, and has clearance to it.
> >The 7700 would be getting close to the rear connecor stacks, and
> >definitely passes over a portion of the Northbridge. I would not
> >be able to fit a 7700 in my case, because my rear case fan would
> >bump into the fins (I use a 120x120x37mm fan).
>
> Whose case do you use? I presume that you're using Papst or Panaflow
> fans, but if you've found something else with good noise specs, please
> let me know. The Papst and Panaflows are relatively hard to find.
>
> I normally leave the sides open on systems, so I don't use fans in the
> back. Yeah, more noise and unclear airflow path, but I end up
> swapping boards and drives too often.
>
> I *do* put fans in front of all the drives, and that's where I'm
> looking to place some high cfm, low noise fans. Currently have Antec
> 80mms which are good, but they may become audible if I quiet down the
> CPU fan.
>
> > Paul
>
> Paul, you could archive all your posts and have a great manual
> for Asus installation. Thanks again for another helpful post.
>
> As it stands, I'll probably opt for the 7000AlCu, as I'd like to
> minimize lateral (gravity) stress on the motherboard. I normally
> don't go for 'Lan Party' effects, but I think they make one with a
> blue LED which could be useful for monitoring fan power.
>
> BTW, I guess all mention of 7000 above should really be 7000B, as that
> is Zalman's current model. I haven't seen the 7000A advertised, but
> I've seen plenty of the plain 7000's in price lists. That would seem
> to be an older model.
As far as I know, mechanically, the dimensional aspects of 7000, 7000A
and 7000B are the same. They come with different adapters, and you might
still need a separate adapter kit, if you want to use these products
on LGA775. (Newegg lists a plastic ring for $5 or so, that goes with
the 7000 series.) To get the maximum number of adapters in the kit,
buying the B version is the way to go.
In terms of cooling ability versus noise, I think they form a
continuum. If you need absolutely as much cooling as you can get,
then the 7700 is the right answer. If you need a bit less (say
you are trying to build a quiet Athlon64 system), then the 7000 will
do.
Noise is all relative, and as soon as you quiet down one part
of a system, then another source of noise will become apparent.
Some of the systems that are completely sealed, and covered with
cooling fins on the outside, are one way to contain noise. Zalman
makes one, but I doubt it could handle a high end P4. Another
way to stop the noise, is remote the system and just put it in another
room.
In terms of install, one of the reasons I like the Zalman, is the
use of screws to clamp the product in place. When you get within
about a turn or two from the screw being driven fully into place,
the motherboard will start to bend. As a result, you should balance
retention force, versus the possibility of leaving the motherboard
flexed all the time.
The fan I got is a beauty, and I bought it because the body is
made of metal instead of plastic. The brand is "CircuitTest" and
doesn't have any redeeming qualities, except that if I need to
crank it up, it can move a lot of air. This is the fan you buy,
when you cannot get your case air temperature down
🙂 Noise
be damned. Right now, this is not getting a full 12V.
http://www.circuittest.com/English/Content/Items/CFA1212038MS.asp
HTH,
Paul
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