A Alpha Pal with a 2500 RPM 80mm....

Regs

Lifer
Aug 9, 2002
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Well I recently received a Alpha Pal HSF with a Thermaltake 80mm fan. Once I actually got the thing installed I looked at the tachometer and it registered as 2500 RPMs. It is silent however... isn't a 2500 RPM 80mm fan suppose to be for case use? I know with a 80mm fan it has more air flow however 2500 RPMs seems a little to weak. Will a 3200 RPM make much of a difference? I am running 48-50c idle right now, during a game maybe 52-54c.
 

beatle

Diamond Member
Apr 2, 2001
5,661
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Which Alpha, the 8045? 2500 is not bad for a case fan. I run a 2500 rpm Panaflo M1a on my overclocked tbred with good case cooling. Those temps you list aren't too bad.
 

Regs

Lifer
Aug 9, 2002
16,665
21
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8045, yes. And the 2500 RPM thermaltake is on the heat sink not the case. I also have the fan blowing outward.
 

Palek

Senior member
Jun 20, 2001
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For the 8045, there is about a 1 or 2 degree Celsius difference between suck and blow mode, so it really does not matter which way the fan rotates. As for the fan speed, it depends on your CPU, but a 2500 rpm 80 mm fan should be enough for up to 1800+ XPs - don't take my word for it though. I have an Alpha 8045 on my 2400+ which previously donned a Delta screamer on top running at 4000 rpm, and it provided more than sufficient cooling, so I presume 2500 rpm could be enough for a 1800+. (Although 3000 rpm would be more ideal just to be on the safe side...)

I hated the noise, so I replaced the 80 mm fan with a super-slow 120 mm model. It raised temperatures a few degrees, but the CPU can take it, and it is sooooo quiet!
 

oldfart

Lifer
Dec 2, 1999
10,207
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I run an Alpha 8942 on a P4 2.6 @ 3.34 GHz with a Panaflo M1A 80mm fan. Works fine and is very quiet. I ran a 80mm L1A 1900 RPM on my 3.06 GHz CPU which was also great. No need for lots of noise!
 

Regs

Lifer
Aug 9, 2002
16,665
21
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Whats your CPU temps and room/case temps, oldfart ?

On a 80 degree day like today, my cpu runs around the 52c mark. Since my case isn't exactly top of the line, I think it would be best for my fan to be blowing on the heat sink rather away.

Seems like no matter what I do, I can't keep this cpu cool.
 

KillaBong

Senior member
Nov 26, 2002
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I would have it suck air out because it was designed for it. There is very small space between the little prongs and sucking seems to be like 1-2 degrees cooler. I personally use the 4000rpm delta, and it keeps my processor at about 35-45 depending on how long/intensive it has been working.
 

HiTek21

Diamond Member
Jul 4, 2002
4,391
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I have an Alpha Pal 8045 heatsink with a Vantec Stealth fan on it, 27cfm at 21dBA. It runs about 2200rpm with idle temps around 48 - 50 and 54 - 56 under load. Case temps are around 28 - 30c. A lot of people say for the higher end heatsinks you need to run a high CFM fan to get the best results. Also I tried running the fan both direction Exhaust and Blowing and I get better results with exhaust.
If you lap your heatsink might be able drop your CPU temps by a few degrees but don't expect a whole lot more.
 

Chaotic42

Lifer
Jun 15, 2001
33,929
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I use case fans for my CPUs. Since I have two, I take any chance I get to cut down on the noise. It's a nice low hum. I had an 8054 and I could actually run it for quite a while with no fan. I did have a 119CFM (IIRC) Delta on it though. Kept it at 32C under load. ;)