P
Phil Weldon
'Al Kaufmann' wrote in part:
| I found out sometime ago that by taking the side off my case, I can
| lower the speed of my cpu fan to minimum and the temperature reported
| by Motherboard Monitor drops by about 5~10C. To top thing off I
| reason enjoy the reduction in noise.
_____
What I've found to be very useful is to arrange for the CPU heatsink fan to
blow down into the heatsink, then cutting a 120mm hole in the Tower case
side and mounting a 120mm fan to blow outside air directly into the
motherboard area that contains the CPU heatskink/fan, DC-DC voltage
convertors/regulators, memory, chipsets, and the back of the display
adapter. Two 80mm fans blow blow out the back. The power supply has two
fans that exhaust through the rear. All air intake is through the front
across the hard drives and removable media drives. With this arrangement
the temperatures go UP when the side is removed.
The cases I like best (if bulky isn't a problem) is a tower that is deeper
than is usual, the EN-8950. This Enlight case is convertible to use either
as a tower or a rack-mount case, and has the dimensions of 25.6" inches high
by 8.6" wide by 19" deep, deep enough for the drives to be nearly a foot
from the motherboard. There are 9 slots with rails for 1 inch hight hard
drives and/or removable media drives that can be removed and isntalled
through the front door. It isn't fancy, but the extra room inside promotes
good air ciruclation and makes component changes easier. It comes with or
without power supplies (including redundant supplies, up to 2 X 600 Watts)
as well as a hot swap module for 5 X 1" height drives. Electrostatic
filters are provided for front intake and rear exhaust. The price is bad, ~
$100 US last time I bought (no power supplies or hotswap module included at
that price.) The one I have up and running at the moment has 5 hard drives,
a floppy, a DVD +R/W, a CD R/W, and a zip drive, leaving one slot free. The
system is a 'Northwood 2.6' GHz @ 3.510 GHz with 640 MBytes RDRAM and the
display adapter varies.
As you experiment with air flow, you might want to invest in a small digital
indoor/outdoor thermometer with a probe. A store like RadioShack will have
one for ~ $15 US.
_____
Phil Weldon
| On Sat, 08 Oct 2005 05:41:59 GMT, "Phil Weldon"
|
| >'Al Kaufmann' wrote, in part:
| >_____
| >
| >| I bought the Antec TruePower supply and I knew that the power supply
| >| fans run at the lowest speed appropriate to load and conditions. I
| >| guess they do not speed up until the power supply gets hot. Not a
| >| good idea if you are into overclocking.
| >_____
| >
| >Power supply fans that speed up when the power supply gets hot are a fine
| >idea. The manufacturer will choose fan speeds to keep the Power Supply
| >operating within specificatios. But ONLY IF the temperature of the air
| >ENTERING the Power Supply is enough lower than the specified operating
| >temperature range. It is reasonable to allow the power supply to choose
a
| >speed for other case fans since the power supply heat output will pretty
| >well track the over all heat output (its all heat in the end - very
little
| >energy is stored a magnetic orientations in magnetic media!) And are the
| >temperature set points for the fans adjustable?
|
| No the case fan speeds are not adjustable as far as I know but the fan
| on my cpu heatsink is adjustable and it is set at maximum - very
| noisy. The 4 case fans are connected to special fan connectors and
| they are pushing very little air.
|
| I found out sometime ago that by taking the side off my case, I can
| lower the speed of my cpu fan to minimum and the temperature reported
| by Motherboard Monitor drops by about 5~10C. To top thing off I
| reason enjoy the reduction in noise.
|
| >Cooling a computer system requires adequate interchange of cooling fluid
| >between the inside of the case and the outside of the case.
| >The cooling fluid (ambient air) must be sufficiently lower than the
desired
| >operating temperature for reasonably sized heat exchangers and
blowers/pumps
| >to transfer the heat generated.
| >
| >The thermal resistance between the high thermal density components
| >(CPU/GPU/chipset/Memory chips) must be sufficiently low.
| >
| >Air flow WITHIN the system case is important. This is not a trivial
| >problem. Systems run coolest and quietest when air from outside the case
is
| >directly applied to the CPU heat exchanger, the GPU heat exchanger and
the
| >PSU, then exhausted diredtly outside the case. An additional air stream
| >should idealy be used to cool hard drives, memory and motherboard (along
| >with the hotspots - chipsets, DC-DC convertor/regulators, and memory.)
You
| >can either go with a well designed completely solution (manufactured
| >computer where supposedly the design is reasonably good) or experiment
with
| >fans, flow directions, accessories, baffles and case apertures. The same
| >equipment arranged differently can make marked temperature differences.
| >However, starting with a 15 C ambient room temperature trumps all.
|
| My case is well designed Lian-Li PC60u with 2 case fans in front
| pulling air in and one at the top and back for exit. I will connect
| these fans to the regular connectors and then see what happens to the
| temperature inside the case.
|
| Ak
|
|
| I found out sometime ago that by taking the side off my case, I can
| lower the speed of my cpu fan to minimum and the temperature reported
| by Motherboard Monitor drops by about 5~10C. To top thing off I
| reason enjoy the reduction in noise.
_____
What I've found to be very useful is to arrange for the CPU heatsink fan to
blow down into the heatsink, then cutting a 120mm hole in the Tower case
side and mounting a 120mm fan to blow outside air directly into the
motherboard area that contains the CPU heatskink/fan, DC-DC voltage
convertors/regulators, memory, chipsets, and the back of the display
adapter. Two 80mm fans blow blow out the back. The power supply has two
fans that exhaust through the rear. All air intake is through the front
across the hard drives and removable media drives. With this arrangement
the temperatures go UP when the side is removed.
The cases I like best (if bulky isn't a problem) is a tower that is deeper
than is usual, the EN-8950. This Enlight case is convertible to use either
as a tower or a rack-mount case, and has the dimensions of 25.6" inches high
by 8.6" wide by 19" deep, deep enough for the drives to be nearly a foot
from the motherboard. There are 9 slots with rails for 1 inch hight hard
drives and/or removable media drives that can be removed and isntalled
through the front door. It isn't fancy, but the extra room inside promotes
good air ciruclation and makes component changes easier. It comes with or
without power supplies (including redundant supplies, up to 2 X 600 Watts)
as well as a hot swap module for 5 X 1" height drives. Electrostatic
filters are provided for front intake and rear exhaust. The price is bad, ~
$100 US last time I bought (no power supplies or hotswap module included at
that price.) The one I have up and running at the moment has 5 hard drives,
a floppy, a DVD +R/W, a CD R/W, and a zip drive, leaving one slot free. The
system is a 'Northwood 2.6' GHz @ 3.510 GHz with 640 MBytes RDRAM and the
display adapter varies.
As you experiment with air flow, you might want to invest in a small digital
indoor/outdoor thermometer with a probe. A store like RadioShack will have
one for ~ $15 US.
_____
Phil Weldon
| On Sat, 08 Oct 2005 05:41:59 GMT, "Phil Weldon"
|
| >'Al Kaufmann' wrote, in part:
| >_____
| >
| >| I bought the Antec TruePower supply and I knew that the power supply
| >| fans run at the lowest speed appropriate to load and conditions. I
| >| guess they do not speed up until the power supply gets hot. Not a
| >| good idea if you are into overclocking.
| >_____
| >
| >Power supply fans that speed up when the power supply gets hot are a fine
| >idea. The manufacturer will choose fan speeds to keep the Power Supply
| >operating within specificatios. But ONLY IF the temperature of the air
| >ENTERING the Power Supply is enough lower than the specified operating
| >temperature range. It is reasonable to allow the power supply to choose
a
| >speed for other case fans since the power supply heat output will pretty
| >well track the over all heat output (its all heat in the end - very
little
| >energy is stored a magnetic orientations in magnetic media!) And are the
| >temperature set points for the fans adjustable?
|
| No the case fan speeds are not adjustable as far as I know but the fan
| on my cpu heatsink is adjustable and it is set at maximum - very
| noisy. The 4 case fans are connected to special fan connectors and
| they are pushing very little air.
|
| I found out sometime ago that by taking the side off my case, I can
| lower the speed of my cpu fan to minimum and the temperature reported
| by Motherboard Monitor drops by about 5~10C. To top thing off I
| reason enjoy the reduction in noise.
|
| >Cooling a computer system requires adequate interchange of cooling fluid
| >between the inside of the case and the outside of the case.
| >The cooling fluid (ambient air) must be sufficiently lower than the
desired
| >operating temperature for reasonably sized heat exchangers and
blowers/pumps
| >to transfer the heat generated.
| >
| >The thermal resistance between the high thermal density components
| >(CPU/GPU/chipset/Memory chips) must be sufficiently low.
| >
| >Air flow WITHIN the system case is important. This is not a trivial
| >problem. Systems run coolest and quietest when air from outside the case
is
| >directly applied to the CPU heat exchanger, the GPU heat exchanger and
the
| >PSU, then exhausted diredtly outside the case. An additional air stream
| >should idealy be used to cool hard drives, memory and motherboard (along
| >with the hotspots - chipsets, DC-DC convertor/regulators, and memory.)
You
| >can either go with a well designed completely solution (manufactured
| >computer where supposedly the design is reasonably good) or experiment
with
| >fans, flow directions, accessories, baffles and case apertures. The same
| >equipment arranged differently can make marked temperature differences.
| >However, starting with a 15 C ambient room temperature trumps all.
|
| My case is well designed Lian-Li PC60u with 2 case fans in front
| pulling air in and one at the top and back for exit. I will connect
| these fans to the regular connectors and then see what happens to the
| temperature inside the case.
|
| Ak
|
|