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| Thread ID: 50784 | 2004-11-01 10:50:00 | Fans: Blast air on to CPU? Or suck it away from CPU? | george12 (7) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 286789 | 2004-11-01 21:32:00 | All the fans that I have come across blow air in the direction of the struts that hold the motor. Case fans blowing out have struts facing out. AMD heatsink fans have struts against the fins and blow air downwards. I haven't seen any standard AMD fan mounted with the strut side up. One of the benefits of aftermarket CPU heatsinks is the amount of air blown down around the CPU power regulator transistors. |
PaulD (232) | ||
| 286790 | 2004-11-01 21:32:00 | Alrighty,I just pulled the side off a running comp and held a sliver of paper above the cpu fan,it is sucking air away from the cpu. AMD 2600+ Cpu with stock heatsink. |
metla (154) | ||
| 286791 | 2004-11-01 21:46:00 | Now just done it on a celeron 700,its blowing air down onto the cpu..... | metla (154) | ||
| 286792 | 2004-11-01 21:53:00 | hmmmm.....Now just plugged in a Cooler Master with speed control and ran it full blast sitting on my workbench,This one is blowing down at a huge rate of knots,and expelling cool air out the sides of the fins at high velocity.Maybe my initial test on the AMD was flawed.... Nice fan/heatsink,Im thinking i should whack it in a comp now. |
metla (154) | ||
| 286793 | 2004-11-01 21:58:00 | To Suck or to Blow A lot of people have been asking whether it’s better to have the fan blow onto the heatsink or to suck air from it. I generally tell them to suck it, heh, but it depends on your setup. If you want the fan to pull air from the heatsink, then you must make sure that the hot air is effectively taken away. Make sure there is enough cool air getting into the case and the hot air out. I’ve set all my CPU fans inside my computers to pull air away from the heatsinks. I find that doing this generally lowers the temperature by a few degrees. Your results may vary so figure out what type of setup works for your computer. Quoted from here (www.tweak3d.net) |
Rob99 (151) | ||
| 286794 | 2004-11-01 22:09:00 | So, in summary, AMD sucks while Intel blows - I thought only Cyrix sucked (or is that blowed?) Blowed if I know! |
POTUS (5276) | ||
| 286795 | 2004-11-01 22:23:00 | All my PC's are setup so that the front fans suck fresh air into the case, and the rear fans extract it out of the case. By doing this fresh air is pulled past the harddrives and then past the graphics card and CPU. Ive also found that a blowhole at the top of the case helps to remove stagnant hot air. | Pete O'Neil (250) | ||
| 286796 | 2004-11-01 23:24:00 | > So, in summary, AMD sucks while Intel blows - I > thought only Cyrix sucked (or is that blowed?) Nope, My Intel sucks ait from the CPU as it should and directs it up into the PSU fan which then sucks it out over that heat sink and then another fan sucks it out the back. Also a fan sucks air directly out the back just near the Gfx card. So airflow gets sucked into the PC from the front, gets drawn across the components and then gets pushed out the back as all good fans should. |
Big John (551) | ||
| 286797 | 2004-11-01 23:25:00 | One reason you are all arguing about sucking or blowing is that in fact it doesn't make much difference at all, 'all other things being equal'. If you had all studied science at school, dig, dig, Metla :) , then you would have come across the concept of reciprocity. The most important fact that tweak'e has emphasised over and over is the temperature of the air in the case. The heat transfer to or from the heat sink fins is a function of air velocity over them and the temperature differential. As Peter has said, one of the most effective cooling methods is a 120mm fan in the side of the case blowing directly at the cpu fan. In this case the cpu fan must also blow into the heat sink, so that the flow directions dont oppose one another. |
Terry Porritt (14) | ||
| 286798 | 2004-11-01 23:30:00 | Mate,I invented reciprocity. | metla (154) | ||
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