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My cooling problem....need help? Here is an email I sent to Swiftech Technical support: Quote:
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Can anyone offer me some suggestions here? Thanks.
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![]() Kaitain....That's a lot of pontification for such little output... ![]() Dan, Here are a couple of other things. It seems as if you have your fan blowing away from the heat sink instead of blowing onto it. If this is the case, switch it. That's what the Swiftech guy was saying. (maybe I didn't follow you completely, if it is blowing onto the HS) Also, with the cover of your case off, your intake/exhaust fans are virtually ineffective. Are the fans in your case blowing through the stock grill? Or have you modded your case? Either way, I would suggest cutting holes where the fans currently are to fit 120mm fans and arrange them according to the diagram below. Leaving your cover on should help to increase the effectiveness of the fans. If you're concerned about noise, the Enermax 120mm fans are really quiet. I have two in my case at the moment, and the pump from my water rig is louder. :-D http://members.cox.net/hard10/images/flow1.jpg BTW your name sounds really familiar....do you post on [H] as well?? |
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My 68.5CFM Delta is blowing on the heatsink. I have 2 50CFM Sunon fans for intake and exhaust just like your diagram. These fans are pretty powerful. I don't think the 120mm will buy me much and I just purchased these 50CFM's. What I'm thinking is maybe I could cut a hole in the side cover opposite the HSF and install PVC 4inch to 3inch reduction pipe directly over the HSF. Then I would turn around the front intake fan and make it an exhaust fan along with the rear exhaust fan. I really think this would probably be my best approach. This would draw ambient air directly on to the heatsink from outside the case. What do you think. If I felt this would give me an extra 4C drop, then it would be worth it. I already have the PVC pipe and sheet metal cutters. I have also already cut out the perforations for the rear and front fans and used foam insulation tape between the front cover and bay areas to prevent the front fan from recirculating inside air from the bay areas.
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well, a 13c deltaT is AMAZING for a heatsink, the waterblock me and kaitain put togeather gave me an 11c delta! I dont think you will be able to improve that! But, by using a duct, you will be getting the 20c ambient air directly to the Heatsink, rather than your 24C air in the case, this will definately drop the temps! With an 80mm delta, the airflow is so ferocious that you dont have any need to assist it away from the heatsink base.
__________________ Dual XP1600+ AGOIA "Y" @ 1875mhz WATERCOOLED 33C LOAD Undergoing overhaul. Hard Locking to 13.5X multiplier for theoretical clockrate of 1944mhz 144mhz FSB 1X Duron 1.3 AHCLA "9" @ 1430mhz 1X Celeron 1000mhz 1X Pentium3 450 DECEASED Folding Under AOA-UK for team 45! ![]() "Mothers should love their babies, because then they grow up, everyone might hate them." |
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The 120mm fans that I referred to can move some air when they are cranked up. Like I said they are still quieter than my pump, and both of them are @ about 1700RPM.....which I think give the same or more cfm than the Sunon's you talked about. They are supposed to go up to 2300 rpm, but I've got them cranked all the way up and MBM is reading 1700 or so. I have a Sunon in the side of my case, and I think it's making the most noise. But it's just there to give fresh are to my RAD....(I'm working on a redesign). Again.....make sure that you're case-cover is on, and that you're cables aren't inhibiting airflow. Then again, some procs just run hot. I had a 1.4 T-Bird that just wouldn't go below 45°C air-cooled. Load temp was around 62°C!!!!!! So, if you have the ability, try another proc with the exact same setup. Venting like you suggested might make the exhaust design difficult...because heat rises and it would be better to go through the top while leaving enough room for air intake. Have you got any pics? Maybe your case could be cleaned up with some round cables and/or electrical tape that would make all the difference. Those HS are pretty *****-hot...I've seen people make water coolers out of 'em. So maybe you might consider that??? -----water cooling that is......:-D
__________________ Wherever you go.... There you are. And right now I'm in Heaven!!! ![]() AMD XP1600+ @ 1754MHz >> and gradually working my way up!!! MSI KT3 Ultra ARU GF2 MX400 (200/334) @ 233/366 2x 20GB Maxtor RAID 0 1x 30GB Maxtor --> WinXP ![]() Last edited by chazz469; 24th May, 2002 at 09:40 AM. |
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danaltick seemed to be worried that his heatsink wasn't performing as well as it might. I hoped that, by just touching on the theory behind heatsink design, I might point out that it was performing at or near theoretical limits for the sort of design model that Swiftech are likely to be using. Didn't want to wheel out the full maths though (that appears in another thread started by BillA). Sorry ![]()
__________________ It is by coffee alone I set my mind in motion... |
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Just wanted to let you know that if I take the cover off, my temps at 20C ambient are 23C system and 34C CPU. My CPU temp. drops another 3C. That is why I think the PVC may help. Also, my case cabling is fine. I have taken care of that. Sorry, I don't have a digital camera for taking pictures.
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Glad that you're making progress, danaltick. While the 50 cfm Sunons are nice, you can double your throughput with two Sunon 120mm 108 cfm's in their place. The 120mm's are louder, but they sound more like white noise than anything else. AMD boxen require 100 cfm throughput, IMHO. This volume of air isn't necessary if well thought out ducts are used.
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