CPU overheating problems SOLVED!!!

puttputtgolf2000 · 09-07-2005, 08:42 PM

Hi guys, this is my first post!

I’ve noticed many of you are complaining of overheating CPU’s, and I’d like to share my recent experience with mine overheating, and how I fixed it.

Here's my brand new setup: Intel P4 3.2G 775 prescott 800fsb, Asus P5RD1-V mobo, 1gb OCZ dual channel DDR, 400w dual fan PS, ATX case w/80mm exhaust fan, etc.

My CPU was running at 51deg Celsius on idle, and 70+ deg under load (playing games)! It got so bad the OS would kill a few apps just to decrease the load on the CPU, but temps stayed high for long periods of time. After a couple weeks like this, I fried my first mobo. After replacing it, I decided some drastic action was necessary to lower the temps before I cause more damage.

My friend who has a similar setup also had this problem. He added a ZalmanCPU heatsink and fan, and reported improvements of a few degrees but they were not significant therefore I didn’t want to go that route.

I emptied out my case and took it to a machine shop and drilled the holes and removed the shield that was limiting airflow. I installed a Thermaltake 120mm exhaust fan replacing the original 80mm. I used the 80mm for the front intake instead. This helped bring temps down from 51 to 47 deg at idle, but did not do much in terms of preventing high peak temps. The 120mm fan did help in releasing the hot air, so the time needed to return to idle temps was shortened. Needless to say I was not impressed with the results, so I wanted to take this a step further.

I went back to the shop and this time I machined a custom aluminum snorkel or “Air Guide” as the industry calls it, which directs cool air to the CPU from a side panel opening. Only difference was, my air guide would be force fed by another 80mm ultra quiet fan forcing cool outside air directly to the OEM CPU heatsink/fan assembly.

It works in similar way to a supercharger or turbo on a car, only this one is electric powered instead of belt or exhaust driven.

The results were staggering!!!

Idle temps dropped from the initial 47 degrees after the first round of mods to 28 degrees!!!

That’s a drop of almost 50% from before!

Peak temps dropped from a scorching 70+ degrees to only 42 degrees MAX! And the best part is the time it takes for temps to drop from peak back to idle is around 1 minute!

While looking for residual hot spots, I found a pocket of hot air sitting in between the back of the power supply and the CD/DVD drives at the top of the case. For the fun of it I added a 40mm fan I had lying around as a blowhole to see what it would do. The power supply is noticeably cooler, the power supply fans run at a much lower rpm now, and the time from peak to idle temps is well within a minute now.

I’m adding a fan controller next week so I can manually adjust the rpm of the 120mm exhaust fan and the turbo air guide fan as needed, and to see if I can bring the sound levels down from 35db to 25db.

If you guys are interested I’ll post pics tonight when I get home.

robina_80 · 09-07-2005, 10:55 PM

post a pic of your modded case

Hairy_Lee · 09-07-2005, 11:43 PM

sounds impressive, did you change your heatsink or do you still use the sock one?

georgi0u · 09-08-2005, 01:09 AM

i have the same problem. I tried a new fan but i looked into the funnel thing and i was thinking of puttin a new fan on top of that. You've convinced me!

thank you. Also id like to say we're u drilled ur holes (the first set)... Thanks -adam

diduknowthat · 09-08-2005, 02:27 AM

lol i added an airduct and i didn't see that drastic results...hmmmmm

Johnnyboy0056 · 09-08-2005, 03:58 AM

Quote:

Originally Posted by liuliuboy

lol i added an airduct and i didn't see that drastic results...hmmmmm

lol, thats becuase u dont have ur air condition turned DOWN TO 28 DEGREES!

puttputtgolf2000 · 09-08-2005, 06:05 AM

Quote:

Originally Posted by Hairy_Lee

sounds impressive, did you change your heatsink or do you still use the sock one?

I'm still using the OEM fan/heatsink after hearing my friend's mediocre experience with his aftermarket one.

puttputtgolf2000 · 09-08-2005, 06:08 AM

Quote:

Originally Posted by liuliuboy

lol i added an airduct and i didn't see that drastic results...hmmmmm

Did you add a fan inside your airduct for intake or just the normal setup?
I forgot to mention that the ambient temps in my room when I did these readings were around 25/26 degrees, so I was quite pleased with getting 28 deg at idle.

Fuzzi Bear · 09-08-2005, 11:38 AM

(also sent as a PM to puttputt - but thought others may benefit from the reply)

Puttputt,

Hi mate,

i was VERY impressed to read that you got idle temps in their high-twenties.

I've practically got the same CPU as you. i got a P4 775 Prescott 3.0 (rather than 3.2 like you)

And my temps are identical to your original ones. i got idle at 51c and load at say 63-65c (not quite as high as 70)

but the point is, im about to buy an Antec P180 which is excellent for cooling / solencing, so i dont really want to go cutting air duct holes in the side pannel (or did you actually not do this and i read your post wrong?)

Anyway, im also going to see what difference this case makes to the temps, and if still high, i was going to get a Thermalright XP-120 with a 120mm fan on it, which i hear is good for freezing CPUs.

What are your thoughts mate?

thanks.

puttputtgolf2000 · 09-08-2005, 05:23 PM

Hi Fuzzi Bear, thanks for your kind comments.

I just finished putting together two new systems over the past long weekend. What a bad way to spend a long weekend, I know

Both are P4 541J 3.2Ghz, Asus mobo, 1gb ddr, and use the same Antec Sonata II case with a 450w smartpower supply, 120mm tri-speed fan for exhaust, and an 80mm fan for intake. The Antec cases had their own snorkel/air guide built into it.

I only had the systems for a short period of time because I had to deliver them to their new homes, but I noticed their idle temps were in the mid to high 30’s with ambient temps in my house at around 20 degrees Celsius. I guess with these newer cpu chips, this kinda temps are acceptable and is regarded as the norm. Both these systems used the OEM fan/heatsink assembly from Intel as does mine.

Side-by-Side in the same room, mine reads a few degrees cooler, I attribute the difference in temps to the difference in the snorkel design. The Antec design has the intake opening at the rear-bottom of the case about 5” beneath the 120mm exhaust fan and does not have an intake fan feeding air into it.

This is my only experience with Antec cases, so your results may differ. Do others who have Antec cases here have around the same results?

09-07-2005, 08:42 PM	#1 (permalink)
puttputtgolf2000 New Member Join Date: Sep 2005 Posts: 21	CPU overheating problems SOLVED!!! Hi guys, this is my first post! I’ve noticed many of you are complaining of overheating CPU’s, and I’d like to share my recent experience with mine overheating, and how I fixed it. Here's my brand new setup: Intel P4 3.2G 775 prescott 800fsb, Asus P5RD1-V mobo, 1gb OCZ dual channel DDR, 400w dual fan PS, ATX case w/80mm exhaust fan, etc. My CPU was running at 51deg Celsius on idle, and 70+ deg under load (playing games)! It got so bad the OS would kill a few apps just to decrease the load on the CPU, but temps stayed high for long periods of time. After a couple weeks like this, I fried my first mobo. After replacing it, I decided some drastic action was necessary to lower the temps before I cause more damage. My friend who has a similar setup also had this problem. He added a ZalmanCPU heatsink and fan, and reported improvements of a few degrees but they were not significant therefore I didn’t want to go that route. I emptied out my case and took it to a machine shop and drilled the holes and removed the shield that was limiting airflow. I installed a Thermaltake 120mm exhaust fan replacing the original 80mm. I used the 80mm for the front intake instead. This helped bring temps down from 51 to 47 deg at idle, but did not do much in terms of preventing high peak temps. The 120mm fan did help in releasing the hot air, so the time needed to return to idle temps was shortened. Needless to say I was not impressed with the results, so I wanted to take this a step further. I went back to the shop and this time I machined a custom aluminum snorkel or “Air Guide” as the industry calls it, which directs cool air to the CPU from a side panel opening. Only difference was, my air guide would be force fed by another 80mm ultra quiet fan forcing cool outside air directly to the OEM CPU heatsink/fan assembly. It works in similar way to a supercharger or turbo on a car, only this one is electric powered instead of belt or exhaust driven. The results were staggering!!! Idle temps dropped from the initial 47 degrees after the first round of mods to 28 degrees!!! That’s a drop of almost 50% from before! Peak temps dropped from a scorching 70+ degrees to only 42 degrees MAX! And the best part is the time it takes for temps to drop from peak back to idle is around 1 minute! While looking for residual hot spots, I found a pocket of hot air sitting in between the back of the power supply and the CD/DVD drives at the top of the case. For the fun of it I added a 40mm fan I had lying around as a blowhole to see what it would do. The power supply is noticeably cooler, the power supply fans run at a much lower rpm now, and the time from peak to idle temps is well within a minute now. I’m adding a fan controller next week so I can manually adjust the rpm of the 120mm exhaust fan and the turbo air guide fan as needed, and to see if I can bring the sound levels down from 35db to 25db. If you guys are interested I’ll post pics tonight when I get home.

09-07-2005, 10:55 PM	#2 (permalink)
robina_80 Diamond Member Join Date: Aug 2004 Location: LONDON Age: 24 Posts: 1,981	post a pic of your modded case __________________ Windows Vista Home Pre x32 AMD 4200X2 S939 512K (2.2) 512M ASUS EN7600GSTOP SILENT 1x80Gb 1x320gb SATA2 2Gb Dual Channel PC3200 Non-ECC DDR Memory Gbyte K8N PRO SLi s939 nF4 530W TAGAN 2FORCE T530-U22 Clabs Aud 2 ZS 7.1 OEM

09-07-2005, 11:43 PM	#3 (permalink)
Hairy_Lee VIP Member Join Date: Apr 2005 Location: Plymouth, UK Age: 25 Posts: 2,553	sounds impressive, did you change your heatsink or do you still use the sock one? __________________ Intel Core 2 Duo E6750 EVGA nForce 650i Ultra mainboard EVGA 7950 GT KO SC 512Mb w/ Zalman VF-900Cu 2Gb of OCZ GOLD XTC SPECIAL OPS Eition Notebook - Acer Aspire 9300 - Turion TL-60/ 2 Gb RAM/ Geforce Go 7600 128 Dedicated (400 Mb turbocache)

09-08-2005, 01:09 AM	#4 (permalink)
georgi0u Silver Member Join Date: Jul 2005 Location: 11510 Age: 19 Posts: 119	i have the same problem. I tried a new fan but i looked into the funnel thing and i was thinking of puttin a new fan on top of that. You've convinced me! thank you. Also id like to say we're u drilled ur holes (the first set)... Thanks -adam __________________ I'm awesome

09-08-2005, 02:27 AM	#5 (permalink)
diduknowthat formerly liuliuboy Join Date: Jun 2005 Location: Massachusetts Age: 17 Posts: 6,485	lol i added an airduct and i didn't see that drastic results...hmmmmm __________________ Dell Latitude XT Convertible Tablet Intel Core 2 Duo U7600 1.2ghz CPU 3GB DDR2 677 Memory 120GB 1.8" PATA Hard Drive ATI Radeon Xpress 1250 Graphics 12.1" WXGA LED Touch Screen N-Trig Capacitive Touch/Active Digitizer

09-08-2005, 11:38 AM	#9 (permalink)
Fuzzi Bear Bronze Member Join Date: Aug 2005 Posts: 26	(also sent as a PM to puttputt - but thought others may benefit from the reply) Puttputt, Hi mate, i was VERY impressed to read that you got idle temps in their high-twenties. I've practically got the same CPU as you. i got a P4 775 Prescott 3.0 (rather than 3.2 like you) And my temps are identical to your original ones. i got idle at 51c and load at say 63-65c (not quite as high as 70) but the point is, im about to buy an Antec P180 which is excellent for cooling / solencing, so i dont really want to go cutting air duct holes in the side pannel (or did you actually not do this and i read your post wrong?) Anyway, im also going to see what difference this case makes to the temps, and if still high, i was going to get a Thermalright XP-120 with a 120mm fan on it, which i hear is good for freezing CPUs. What are your thoughts mate? thanks. __________________ There are ONLY 10 types of people who understand binary. Those that do, and those that dont! ----- As Jonny Five so elequently put it... "Need more input!!"

09-08-2005, 05:23 PM	#10 (permalink)
puttputtgolf2000 New Member Join Date: Sep 2005 Posts: 21	Hi Fuzzi Bear, thanks for your kind comments. I just finished putting together two new systems over the past long weekend. What a bad way to spend a long weekend, I know Both are P4 541J 3.2Ghz, Asus mobo, 1gb ddr, and use the same Antec Sonata II case with a 450w smartpower supply, 120mm tri-speed fan for exhaust, and an 80mm fan for intake. The Antec cases had their own snorkel/air guide built into it. I only had the systems for a short period of time because I had to deliver them to their new homes, but I noticed their idle temps were in the mid to high 30’s with ambient temps in my house at around 20 degrees Celsius. I guess with these newer cpu chips, this kinda temps are acceptable and is regarded as the norm. Both these systems used the OEM fan/heatsink assembly from Intel as does mine. Side-by-Side in the same room, mine reads a few degrees cooler, I attribute the difference in temps to the difference in the snorkel design. The Antec design has the intake opening at the rear-bottom of the case about 5” beneath the 120mm exhaust fan and does not have an intake fan feeding air into it. This is my only experience with Antec cases, so your results may differ. Do others who have Antec cases here have around the same results? __________________ Intel P4 3.2Ghz 775 Prescott 800FSB Asus P5RD1-V 1GB OCZ 3200 DDR dual channel 400W dual fan Tisonic Maxtor DiamondMax10 SATA 250GB LeadTech nVidia 6600GT LG DVD 16x dual layer Custom case w/TURBO AirGuide mod (28c)

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