cooling and noise

[joanne fee]

Dear all,

Fitted a new CPU to my system and decided to get rid of my old beige tower
case and get something more modern. I fitted all my bits as follows to the
new case.

GA-KANF-9 mobo NF4 drr 400
AMD 64 4000+ with stock AMD cooler from my old 3200+
GF 7950gt 512mb
2Gb pc 3200 ram
5.1 sound card
600watt twin fan power supply
2x HDD
1xDVDRW
1x 80mm artic cooling front fan
ATX tower with front, side and rear fan mounts

All is running ok. I have a smart fan option so normal use is quite quiet
but I just ran Crysis and after a few minutes it sounds like my PC is going
to take off!! My old set up never used to run so noisily as the fans would
only peak for a few seconds before ramping down.
I get a CPU temp of 45 deg C with the fan at 5000rpm, the GPU at 75 deg C
with the fan flat out and the system fan at 2500rpm.This is in an ambient of
23 deg C.

I need some info and advise about reducing these temps without the noise.

Firstly does the power supply pull air from the case and out the back?
My front fan blows over the 2 HDD's will this heat up the case?
I have a side port near the CPU and GFX card, would it be worth fitting a
quiet fan hear to put in cold air and keep the CPU and GPU fan speeds down?
Are there any good passive or slow fan cooling options?
would a heat extract at the rear near the GFX card and CPU help?
What is the best cooling layout (air in and out) for a system?

Thanks for any help, in the mean time I will have to turn up the 5.1 system
to drown out the noise.

 

[Michael Hawes]

Dear all,

Fitted a new CPU to my system and decided to get rid of my old beige tower
case and get something more modern. I fitted all my bits as follows to the
new case.

GA-KANF-9 mobo NF4 drr 400
AMD 64 4000+ with stock AMD cooler from my old 3200+
GF 7950gt 512mb
2Gb pc 3200 ram
5.1 sound card
600watt twin fan power supply
2x HDD
1xDVDRW
1x 80mm artic cooling front fan
ATX tower with front, side and rear fan mounts

All is running ok. I have a smart fan option so normal use is quite quiet
but I just ran Crysis and after a few minutes it sounds like my PC is
going to take off!! My old set up never used to run so noisily as the fans
would only peak for a few seconds before ramping down.
I get a CPU temp of 45 deg C with the fan at 5000rpm, the GPU at 75 deg C
with the fan flat out and the system fan at 2500rpm.This is in an ambient
of 23 deg C.

I need some info and advise about reducing these temps without the noise.

Firstly does the power supply pull air from the case and out the back?
My front fan blows over the 2 HDD's will this heat up the case?
I have a side port near the CPU and GFX card, would it be worth fitting a
quiet fan hear to put in cold air and keep the CPU and GPU fan speeds
down?
Are there any good passive or slow fan cooling options?
would a heat extract at the rear near the GFX card and CPU help?
What is the best cooling layout (air in and out) for a system?

Thanks for any help, in the mean time I will have to turn up the 5.1
system to drown out the noise.

Blame Crysis, it's working your graphics card flat out. The fan may be
failing and noisier than it should be. Check out fitting an after-market
cooler. I fitted an Arctic Coolinf coller to my GF 7800GT, much quieter and
cooler too.

Mike.

 

[Michael Hawes]

Blame Crysis, it's working your graphics card flat out. The fan may be
failing and noisier than it should be. Check out fitting an after-market
cooler. I fitted an Arctic Coolinf cooler to my GF 7800GT, much quieter
and
cooler too.

Mike.

 

[pcbldrNinetyEight]

Dear all,

Fitted a new CPU to my system and decided to get rid of my old beige
tower case and get something more modern. I fitted all my bits as
follows to the new case.

GA-KANF-9 mobo NF4 drr 400
AMD 64 4000+ with stock AMD cooler from my old 3200+
GF 7950gt 512mb
2Gb pc 3200 ram
5.1 sound card
600watt twin fan power supply
2x HDD
1xDVDRW
1x 80mm artic cooling front fan
ATX tower with front, side and rear fan mounts

All is running ok. I have a smart fan option so normal use is quite
quiet but I just ran Crysis and after a few minutes it sounds like my
PC is going to take off!! My old set up never used to run so noisily
as the fans would only peak for a few seconds before ramping down.
I get a CPU temp of 45 deg C with the fan at 5000rpm, the GPU at 75
deg C with the fan flat out and the system fan at 2500rpm.This is in
an ambient of 23 deg C.

I need some info and advise about reducing these temps without the
noise.

Firstly does the power supply pull air from the case and out the back?
My front fan blows over the 2 HDD's will this heat up the case?
I have a side port near the CPU and GFX card, would it be worth
fitting a quiet fan hear to put in cold air and keep the CPU and GPU
fan speeds down? Are there any good passive or slow fan cooling
options? would a heat extract at the rear near the GFX card and CPU
help? What is the best cooling layout (air in and out) for a system?

Thanks for any help, in the mean time I will have to turn up the 5.1
system to drown out the noise.

Hot air rises and would collect in the top of the case were it not for the
PSU fan. The PSU fan draws hot air in and exhausts it out the back of the
case.

I prefer a fan arrangement that pulls air out rather than pushing it in.
IMO pushing air in is a ineffective because it is difficult to predict
where that air will exit. The best you can hope for by pushing air in is
that you might get some cooling on a component if the air blows directly on
it.

IMO the best place for a case fan is in the top at the rear. The larger the
fan diameter the better, 120mm is ideal. This is also where the hottest
components are located. If the fan(s) are effective a low pressure area
will be created inside the case and cool air will be draw into the case
through the cooling vents.

The case I use has a 120mm fan at the top rear just under the PSU. It also
has an adjustable duct on the side air vent that channels outside air into
the CPU fan. This air is then blow into the cooling fins on the heatsink by
the CPU fan.

If you play demanding games then fan cooling alone may not be sufficient.
You may need water cooling too.

 

[johns]

I assume you mean the GA-K8NS-9 mobo:

Get AC Silencer 64 ULTRA tc for the cpu. It is
easy to install and very quiet.

The 7950 video card is a screamer. I installed
a Zalman VF900 fan, and I never heard the fan
again ... GPU temps stayed in 30s and 40s.
Best of all, the 7950 can't control the VF900,
so it stays at the speed you set it with an
external Fanmate2 controller that comes
with the cooler.

I assume you have an Antec case now. Call
Antec and tell them you want the fans that
come in the Antec 900 case ( 120 mm with
3 position switch for speed ). Set all of them
to lowest speed.

johns