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#1
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Temperature on A7N8X-E one cooler vs another
Running an AMD XP+ 2600 (Barton, I believe) no my son's A7N8X-E, using
Arctic Silver for the heat Xfr paste, and wanted to switch from an aftermarket (all copper), low-RPM fam cooler to the aluminum (with copper contact point) cooler that came with the CPU because: a) It feels to be about 1/3 the weight. b) The mobo is on its side, so the cooler is hanging in space rather than bearing down on the chip. c) Neither cooler has tiedowns... they both rely on the socket for support. d) My son is going to college 1/2 way across the country and I won't be there to fix it if it breaks. Problem is, according to ASUS probe, the CPU temperature with the (better) heavier cooler is 44C Max. The temperature with the stock cooler is 47C Max. This is in an A/C'd room, case closed, not the coolest one in the house (ambient 87F), playing videos/checking email, running apps simultaneously. (He is not a heavy gamer.) So are we borrowing trouble with the less capable cooler or will the weight difference probably make the reliability better in the long run? TIA KWW |
#2
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On Tue, 17 Aug 2004 05:29:19 -0500, "KWW"
wrote: Running an AMD XP+ 2600 (Barton, I believe) no my son's A7N8X-E, using Arctic Silver for the heat Xfr paste, and wanted to switch from an aftermarket (all copper), low-RPM fam cooler to the aluminum (with copper contact point) cooler that came with the CPU because: a) It feels to be about 1/3 the weight. b) The mobo is on its side, so the cooler is hanging in space rather than bearing down on the chip. c) Neither cooler has tiedowns... they both rely on the socket for support. d) My son is going to college 1/2 way across the country and I won't be there to fix it if it breaks. Problem is, according to ASUS probe, the CPU temperature with the (better) heavier cooler is 44C Max. The temperature with the stock cooler is 47C Max. This is in an A/C'd room, case closed, not the coolest one in the house (ambient 87F), playing videos/checking email, running apps simultaneously. (He is not a heavy gamer.) So are we borrowing trouble with the less capable cooler or will the weight difference probably make the reliability better in the long run? I thought that the box cooler was crap because it is noisy. What is your feeling about that ? Of course if you reduce the fan speed with a 7 volt adapter, it will be less efficient. 47 C max is definitely a fine full load temperature. But I doubt that is much different from idle temp. Do you use a stress program for full cpu load during per example 10 minutes. That might mean a difference of 10 degrees from idle. Use cpustab: http://home.tiscalinet.ch/ckrebs/index.html I you really want to build a quality cooling system, I can recommend per example a Aerocool Deep Impact cooler tower. http://www.overclockers.co.uk/acatal...oolers_18.html Besides that buy 3 pabst 80 mm fans (the cooler is delivered without fan). Then use 2 of these for cabinet ventilation, and one on the cooler. The 2 for ventalation can be 12 cfm. The one on the cooler can be 19 cfm. Also maybe buy a smal zalman fanmate to regulate the 19 cfm fan down a little. That should make a very silent but efficient cooling system with low weight. best regards John |
#3
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In article , "KWW"
wrote: Running an AMD XP+ 2600 (Barton, I believe) no my son's A7N8X-E, using Arctic Silver for the heat Xfr paste, and wanted to switch from an aftermarket (all copper), low-RPM fam cooler to the aluminum (with copper contact point) cooler that came with the CPU because: a) It feels to be about 1/3 the weight. b) The mobo is on its side, so the cooler is hanging in space rather than bearing down on the chip. c) Neither cooler has tiedowns... they both rely on the socket for support. d) My son is going to college 1/2 way across the country and I won't be there to fix it if it breaks. Problem is, according to ASUS probe, the CPU temperature with the (better) heavier cooler is 44C Max. The temperature with the stock cooler is 47C Max. This is in an A/C'd room, case closed, not the coolest one in the house (ambient 87F), playing videos/checking email, running apps simultaneously. (He is not a heavy gamer.) So are we borrowing trouble with the less capable cooler or will the weight difference probably make the reliability better in the long run? TIA KWW 47C is not a bad temperature. 65C is a relatively bad temperature. Performance is based on "deltas". In your example, ambient is 87F. This is equal to 31C. AMD says a well ventilated case will have a case air (motherboard temperature) rise of no more than 7C. That would bring the air to no more than 38C. So, that is how you tell if the case has enough fans, by the delta from room to case air. Your processor is 54 watts max. For the processor, the power times the thermal resistance, gives the temp rise or delta, between case air and die temperature. I.e. A heatsink with a thermal resistance of 0.25C/W would results in a CPU temp of 38C + 0.25*54 = 51.5C die temp First off, for thermal benchmarking, it would help to have an app that pushes the machine to 100% load. Prime95 (in "torture test" mode) is one application people use to heat up the processor and test for calculation stability (mersenne.org). CPUBurn was another I've used in the past. (http://users.ev1.net/~redelm but site appears to be gone.) They'll give you an idea of what a good computing load will do. I can see a couple of approaches. One approach is to build a battleship. This is an example of a product with a backing plate and is screw mounted: http://www.thermalright.com/a_page/m...duct_index.htm http://www.thermalright.com/a_page/m...oduct_sp97.htm (585 grams) A couple of the products on the Thermalright page use the screw holes in the board. There are four holes around the socket (or rather, they are shown in the manual, but check the actual board, as there have been Asus boards in the past, where not all board revisions had their holes). Using the screw holes means the clip won't get busted off in transit. You can see the substantial nipples and spring loaded screws at the top of this page: http://silentpcreview.com/article132-page4.html The only question I have about this technique, is when the PC is being shipped, would a twisting or torquing action on the case, cause increased pressure on the die. Any processor has a max pressure that can be applied (the "normal force" or force normal to the surface). While in one advert, they claimed they dropped a PC equipped with a screw hole heatsink from a second story window, and the heatsink stayed on the board, the pressure applied to the die could be another matter. In the end, is there much difference between a computer that arrives with a crushed die, or one that arrives with the clips busted off ? I don't think I've read an article that addresses the effects of shipping. Rather than build a battleship, the other approach you could take, is coaching your son on heatsink installation. For risk reduction, the screw down approach might be safer than the clip approach, depending on what the clips look like. You could ship the PC without the heatsink fully installed, and he could complete the job when the PC is uncrated at the destination. This one also screws down, but it weighs a bit less. To use this one, you need to check the compatibility list, plus as well, if the processor socket is near the upper edge of the motherboard, you'll need about 10mm clearance from the top edge of the motherboard, to the PSU metal case. Not all cases have enough room to meet the 10mm requirement. http://www.zalman.co.kr/eng/product/...dx=54&code=005 http://www.zalman.co.kr/Upload/product/CNPS7000A(S)_en3010.pdf This one uses spring loaded screws, but still uses the tabs on the socket for support. This one would be best installed at the destination. http://www.swiftnets.com/products/mcx462-V.asp (Note: The products that don't come with a fan, you may be able to recycle a fan from one of the HSFs you already have. Otherwise, a Panaflo FBA08A12L1A is quoted as a quiet fan - but it doesn't have a tacho signal. Model number FBA08A12M1BX runs at higher speed and is louder, but has a tacho signal. A Fanmate or similar device can be used to adjust the speed of the fan, to reduce the noise. Digikey carries Panaflo... http://dkc3.digikey.com/PDF/T042/1225.pdf ) So, I'd repeat your measurements, with Prime95, or some other 100% load application. Record your measurements as "deltas", for comparison with the thermal performance when the computer arrives, or at some later date. Then decide which heatsink you like, whether purchasing another one is required, and whether you son has the dexterity to install at the destination. If the computer is travelling sitting on the back seat of a car, that might not be so bad. Probably any product, clip or screw mounted would be safe like that. I drove a computer 1500km that way, and arrived with no damage. A car seat is soft enough, that shock is pretty mild. If shipping by courier I'd be more concerned about it, and would strip some of the more sensitive guts from it before shipping. (Maybe I'm just paranoid, or I hate UPS, maybe both :-) HTH, Paul |
#4
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Can't get to CPU stab.
As for noise, his case is an ANTEC case... and seems to insulate the noise well... runs quieter than mine either way. -- KWW "JK ( at mail dot dk)" wrote in message ... On Tue, 17 Aug 2004 05:29:19 -0500, "KWW" wrote: Running an AMD XP+ 2600 (Barton, I believe) no my son's A7N8X-E, using Arctic Silver for the heat Xfr paste, and wanted to switch from an aftermarket (all copper), low-RPM fam cooler to the aluminum (with copper contact point) cooler that came with the CPU because: a) It feels to be about 1/3 the weight. b) The mobo is on its side, so the cooler is hanging in space rather than bearing down on the chip. c) Neither cooler has tiedowns... they both rely on the socket for support. d) My son is going to college 1/2 way across the country and I won't be there to fix it if it breaks. Problem is, according to ASUS probe, the CPU temperature with the (better) heavier cooler is 44C Max. The temperature with the stock cooler is 47C Max. This is in an A/C'd room, case closed, not the coolest one in the house (ambient 87F), playing videos/checking email, running apps simultaneously. (He is not a heavy gamer.) So are we borrowing trouble with the less capable cooler or will the weight difference probably make the reliability better in the long run? I thought that the box cooler was crap because it is noisy. What is your feeling about that ? Of course if you reduce the fan speed with a 7 volt adapter, it will be less efficient. 47 C max is definitely a fine full load temperature. But I doubt that is much different from idle temp. Do you use a stress program for full cpu load during per example 10 minutes. That might mean a difference of 10 degrees from idle. Use cpustab: http://home.tiscalinet.ch/ckrebs/index.html I you really want to build a quality cooling system, I can recommend per example a Aerocool Deep Impact cooler tower. http://www.overclockers.co.uk/acatal...oolers_18.html Besides that buy 3 pabst 80 mm fans (the cooler is delivered without fan). Then use 2 of these for cabinet ventilation, and one on the cooler. The 2 for ventalation can be 12 cfm. The one on the cooler can be 19 cfm. Also maybe buy a smal zalman fanmate to regulate the 19 cfm fan down a little. That should make a very silent but efficient cooling system with low weight. best regards John |
#5
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Thx. I will be taking the heatsink off to Xport the box. I am driving him
to school. I will look into the other coolers, for sure! Thanks! -- KWW "Paul" wrote in message ... In article , "KWW" wrote: Running an AMD XP+ 2600 (Barton, I believe) no my son's A7N8X-E, using Arctic Silver for the heat Xfr paste, and wanted to switch from an aftermarket (all copper), low-RPM fam cooler to the aluminum (with copper contact point) cooler that came with the CPU because: a) It feels to be about 1/3 the weight. b) The mobo is on its side, so the cooler is hanging in space rather than bearing down on the chip. c) Neither cooler has tiedowns... they both rely on the socket for support. d) My son is going to college 1/2 way across the country and I won't be there to fix it if it breaks. Problem is, according to ASUS probe, the CPU temperature with the (better) heavier cooler is 44C Max. The temperature with the stock cooler is 47C Max. This is in an A/C'd room, case closed, not the coolest one in the house (ambient 87F), playing videos/checking email, running apps simultaneously. (He is not a heavy gamer.) So are we borrowing trouble with the less capable cooler or will the weight difference probably make the reliability better in the long run? TIA KWW 47C is not a bad temperature. 65C is a relatively bad temperature. Performance is based on "deltas". In your example, ambient is 87F. This is equal to 31C. AMD says a well ventilated case will have a case air (motherboard temperature) rise of no more than 7C. That would bring the air to no more than 38C. So, that is how you tell if the case has enough fans, by the delta from room to case air. Your processor is 54 watts max. For the processor, the power times the thermal resistance, gives the temp rise or delta, between case air and die temperature. I.e. A heatsink with a thermal resistance of 0.25C/W would results in a CPU temp of 38C + 0.25*54 = 51.5C die temp First off, for thermal benchmarking, it would help to have an app that pushes the machine to 100% load. Prime95 (in "torture test" mode) is one application people use to heat up the processor and test for calculation stability (mersenne.org). CPUBurn was another I've used in the past. (http://users.ev1.net/~redelm but site appears to be gone.) They'll give you an idea of what a good computing load will do. I can see a couple of approaches. One approach is to build a battleship. This is an example of a product with a backing plate and is screw mounted: http://www.thermalright.com/a_page/m...duct_index.htm http://www.thermalright.com/a_page/m...oduct_sp97.htm (585 grams) A couple of the products on the Thermalright page use the screw holes in the board. There are four holes around the socket (or rather, they are shown in the manual, but check the actual board, as there have been Asus boards in the past, where not all board revisions had their holes). Using the screw holes means the clip won't get busted off in transit. You can see the substantial nipples and spring loaded screws at the top of this page: http://silentpcreview.com/article132-page4.html The only question I have about this technique, is when the PC is being shipped, would a twisting or torquing action on the case, cause increased pressure on the die. Any processor has a max pressure that can be applied (the "normal force" or force normal to the surface). While in one advert, they claimed they dropped a PC equipped with a screw hole heatsink from a second story window, and the heatsink stayed on the board, the pressure applied to the die could be another matter. In the end, is there much difference between a computer that arrives with a crushed die, or one that arrives with the clips busted off ? I don't think I've read an article that addresses the effects of shipping. Rather than build a battleship, the other approach you could take, is coaching your son on heatsink installation. For risk reduction, the screw down approach might be safer than the clip approach, depending on what the clips look like. You could ship the PC without the heatsink fully installed, and he could complete the job when the PC is uncrated at the destination. This one also screws down, but it weighs a bit less. To use this one, you need to check the compatibility list, plus as well, if the processor socket is near the upper edge of the motherboard, you'll need about 10mm clearance from the top edge of the motherboard, to the PSU metal case. Not all cases have enough room to meet the 10mm requirement. http://www.zalman.co.kr/eng/product/...dx=54&code=005 http://www.zalman.co.kr/Upload/product/CNPS7000A(S)_en3010.pdf This one uses spring loaded screws, but still uses the tabs on the socket for support. This one would be best installed at the destination. http://www.swiftnets.com/products/mcx462-V.asp (Note: The products that don't come with a fan, you may be able to recycle a fan from one of the HSFs you already have. Otherwise, a Panaflo FBA08A12L1A is quoted as a quiet fan - but it doesn't have a tacho signal. Model number FBA08A12M1BX runs at higher speed and is louder, but has a tacho signal. A Fanmate or similar device can be used to adjust the speed of the fan, to reduce the noise. Digikey carries Panaflo... http://dkc3.digikey.com/PDF/T042/1225.pdf ) So, I'd repeat your measurements, with Prime95, or some other 100% load application. Record your measurements as "deltas", for comparison with the thermal performance when the computer arrives, or at some later date. Then decide which heatsink you like, whether purchasing another one is required, and whether you son has the dexterity to install at the destination. If the computer is travelling sitting on the back seat of a car, that might not be so bad. Probably any product, clip or screw mounted would be safe like that. I drove a computer 1500km that way, and arrived with no damage. A car seat is soft enough, that shock is pretty mild. If shipping by courier I'd be more concerned about it, and would strip some of the more sensitive guts from it before shipping. (Maybe I'm just paranoid, or I hate UPS, maybe both :-) HTH, Paul |
#6
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On Wed, 18 Aug 2004 09:35:09 GMT, "KWW"
wrote: Can't get to CPU stab. http://home.tiscalinet.ch/ckrebs/downloads/cpustab.exe else search on google after: cpustab.exe or yahoo search. best regards John As for noise, his case is an ANTEC case... and seems to insulate the noise well... runs quieter than mine either way. |
#7
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Something weird about my browser setup. It gives me "can't access" for the
linked site AND .pdf links. I tried messing with settings but just find it easier to go to another computer on our LAN than spend a lot of time with it. (IE6 on Win2k Pro) Thanks! -- KWW "JK ( at mail dot dk)" wrote in message ... On Wed, 18 Aug 2004 09:35:09 GMT, "KWW" wrote: Can't get to CPU stab. http://home.tiscalinet.ch/ckrebs/downloads/cpustab.exe else search on google after: cpustab.exe or yahoo search. best regards John As for noise, his case is an ANTEC case... and seems to insulate the noise well... runs quieter than mine either way. |
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