my PSU (Antec TruePower 430W) has two fans. One fan blows air outside the case and one fan sucks air from inside the case. I don't know if I've ever seen a PSU that blew air into the case. That seems stupid to me.
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Geeky1University of the Pacific (Stockton, CA, USA)
edited December 2003
A2J, the original ATX spec called for the fan in a PS to be an intake fan.
I was thinking of ducting for more of space reasons, those are huge fans, not the air temp.
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Geeky1University of the Pacific (Stockton, CA, USA)
edited December 2003
I wasn't passing judgement on it...
But that's why you'd have a ps blowing air into the case. And at the time, it actually wasn't that dumb. Air coming out of the PS on old pentium-class systems is generally no warmer than ambient. So, having the PS blow that air across the CPU made a great deal of sense at the time. Of course, if it was still that way, I'd have my 550w Antec blowing air across my dual 2500s, and they'd both be cooked.
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Geeky1University of the Pacific (Stockton, CA, USA)
edited December 2003
Actually croc_, they're not that big- they're 120x32mm. Besides, this thing isn't going in my case. I'll be bench testing it. That fan assembly weighs 750g or more; there is no way in HELL I'm putting that on an SLK-900A, and hanging 1250-1750g off of 6 little plastic lugs is not something I'm going to do. Especially not when the chip under the assembly is good for in excess of 2.5GHz, and if the thing falls, it'll take out my only remaining working 9700 Pro.
No, this thing is going to be tested on a nice, stable, HORIZONTAL platform. so ducting isn't an issue right now, although I may duct outside air into the blowers tonight, and if they work well, the second revision will be different. I'll keep the ducts in mind for a revised version, but right now, they aren't necessary.
Yeayh, I mean't for in the future if you were goign to use it :P It also solves the problem of weight. I wonder if a P4 HS bracket would be able to support it.
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Geeky1University of the Pacific (Stockton, CA, USA)
edited December 2003
I wouldn't even trust that, personally. I might look into modifying a SP-97 to mount to the case using the old S423 P4 mounting holes, but I don't know that that is possible...
No I wasn't worried about the air temp. I was thinking ducting for two reasons.
1. mounting, bolt them to the side of the case, the duct would be straight and trasition from the size of the blower outlets to the size of the hs.
2. Air handling for the rest of the computer. You don't want to add intake fans just to feed this thing. Let it feed the case and use exhaust fans in the case where you need flow.
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Geeky1University of the Pacific (Stockton, CA, USA)
edited December 2003
Jesus Christ on a Raft! (tm)
I got impatient, so I did a preliminary test on my A7N8X-Deluxe, which has a 1700+ JIUHB DUT3C in it. I put a SLK-800 on it, and set the blower assembly on top.
This thing has a thermal resistance of slightly less than 0.11*C/W. :wow: :wow2:
I clocked the 1700 to just about as high as this particular A7N8X likes, which is 2200MHz (11x200). I bumped the voltage to a much higher than necessary 1.8v. At that speed/voltage, accodring to CPU Power (a CPU heat output calculator), the 1700 produces 93.8w; it's running at 32.8*C idle (can't do full load, because I don't have a HD attached to load windows). That's the actual CPU temp, too, measured by a DD5 flat thermistor that's been cut down to expose the thermistor itself, and which is taped to the side of the CPU core.
Even with the blowers at minimum speed (Vantec Nexus rheobus), it stays below 35*C.
Now just funnel cold air from outside to see if you can beat 2.51GHz by using the NF7-S!
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Geeky1University of the Pacific (Stockton, CA, USA)
edited December 2003
Well, here's the graph; the Delta EHEs are similar to the 80 & 92mm Tornados, so...
Just keep in mind that the data in this graph is not off a datasheet, but off the manufacturer's flow vs. pressure charts, so the values are very rough approximations. However, it is accurate enough for right now, so...
The esteemed Dr FrankenGeeky was seriously injured today when he ventured too close to his new Squirrel Cage Processor Cooling System.
"It has a little too much power." says Dr. FrankenGeeky. "I knew I knew I was in trouble after it consumed my digital camera, desk lamp, and Mr Igor SimGuy." (lab assistant)
Dr. FrankenGeeky is reported to be on his way to a full recovery, and is quoted as saying "It only hurts when I Overclock!"
Geeky needs to cut a hole in the top of his case and run tubing up into the attic and use one of these to suck the air up. Then run tubing from the AC vent directly to his HSF. That way cold air hits the HSF first and the warm air immediately gets sucked out of his case and into the attic.
Comments
But that's why you'd have a ps blowing air into the case. And at the time, it actually wasn't that dumb. Air coming out of the PS on old pentium-class systems is generally no warmer than ambient. So, having the PS blow that air across the CPU made a great deal of sense at the time. Of course, if it was still that way, I'd have my 550w Antec blowing air across my dual 2500s, and they'd both be cooked.
No, this thing is going to be tested on a nice, stable, HORIZONTAL platform. so ducting isn't an issue right now, although I may duct outside air into the blowers tonight, and if they work well, the second revision will be different. I'll keep the ducts in mind for a revised version, but right now, they aren't necessary.
1. mounting, bolt them to the side of the case, the duct would be straight and trasition from the size of the blower outlets to the size of the hs.
2. Air handling for the rest of the computer. You don't want to add intake fans just to feed this thing. Let it feed the case and use exhaust fans in the case where you need flow.
I got impatient, so I did a preliminary test on my A7N8X-Deluxe, which has a 1700+ JIUHB DUT3C in it. I put a SLK-800 on it, and set the blower assembly on top.
This thing has a thermal resistance of slightly less than 0.11*C/W. :wow: :wow2:
I clocked the 1700 to just about as high as this particular A7N8X likes, which is 2200MHz (11x200). I bumped the voltage to a much higher than necessary 1.8v. At that speed/voltage, accodring to CPU Power (a CPU heat output calculator), the 1700 produces 93.8w; it's running at 32.8*C idle (can't do full load, because I don't have a HD attached to load windows). That's the actual CPU temp, too, measured by a DD5 flat thermistor that's been cut down to expose the thermistor itself, and which is taped to the side of the CPU core.
Even with the blowers at minimum speed (Vantec Nexus rheobus), it stays below 35*C.
Just keep in mind that the data in this graph is not off a datasheet, but off the manufacturer's flow vs. pressure charts, so the values are very rough approximations. However, it is accurate enough for right now, so...
"It has a little too much power." says Dr. FrankenGeeky. "I knew I knew I was in trouble after it consumed my digital camera, desk lamp, and Mr Igor SimGuy." (lab assistant)
Dr. FrankenGeeky is reported to be on his way to a full recovery, and is quoted as saying "It only hurts when I Overclock!"
This has been a SN New Update.