Hey all,
have a newly aquired EVGA P67 SLI. Got it rigged and built in a case. So far, just the stock Intel heatsink and fan assembly on a i5-2550K.
Upon cold boot, the POST signals a fast CPU (LOUD) and it settles back down. I wanted to test heat stress of CPU with Intel Burn Test (settings 3times max w/7.1gb) and the temperature is naughty high. The CPU fan is not ramping up to meet the heat requirements. The CPU fan stays a contant 2000rpm. Check board BIOS (A106), reflash BIOS A121 and still have 90°+ on IBT. Adjust BIOS for Manual control @ 100% and still same effect, way too hot. There is not any fan control with temperature on CPU header.
i went so far to plumb a molex 4-pin to fan 3-pin and jacked PSU voltage and it'd spin up to 3500rpm, momentarily and right back to mid-speed 2000rpm.
ok, contacted EVGA and was well appreciated and was enlightened on the control the P67 SLI has on a stock Intel heatsink fan. with the SmartFan control, it does belt full voltage to the fan, in my case, the stock fan looks to be "throttling" the fan speed. something within the fan there ahs got to be a secondary controller to control fan speed (inquiry @ Intel). the EVGA P67 SLI motherboard controls the fan speed of 2100rpm and can decrease with the preimeters set. like @:
60° duty to be 85% - 1800rpm
50° duty to be 70% - 1500rpm
40° duty to be 60% - 1250rpm
30° duty to be 50% - 1050rpm
so there is no concern with the EVGA motherboard at this time it is properly sensing and throttling the pwm to correct speeds, but well under spec of fan.
thank you EVGA for your help and pointing me in the correct direction.
i contacted Intel:
airdeano:
"I have a system build and have never been at ease with the temperatures with the stock cooler installed with no overclocking done. from past experiences (775) the cooler fan RPM (2500rpm+) would increase with temperature. this processor will cold boot a 3500rpm and down play to 2100rpm. with the motherboard (EVGA P67 SLI) Smart Fan manullay set to 100% fan speed, i am still at 2100rpm. apply direct 12v to the fan and it'll rev to 3500rpm and again settle to 2100rpm. i understand energy consumption, noise and ease of use, but this is not useful if the fan cannot be used @ 100% efficent if is "throttled" to only perform at 2100rpm. the original themal material was replaced after two months of operation in attacking this situation. with fan on maximum (2100rpm) the temps are:
ambient: 28°
system: 35°
CPU idle: 34°
CPU load: 96° (testing is 5 continious runs in Maximum w/7.5GB memory not extreme)
is the stock intel heatsink fan throttled to only achive 2100rpm in a 100% load condition?
does the fan speed increase if overclocked at a point?
thank you for your time and if, possible your answers
airdeano'
Intel response:
have a newly aquired EVGA P67 SLI. Got it rigged and built in a case. So far, just the stock Intel heatsink and fan assembly on a i5-2550K.
Upon cold boot, the POST signals a fast CPU (LOUD) and it settles back down. I wanted to test heat stress of CPU with Intel Burn Test (settings 3times max w/7.1gb) and the temperature is naughty high. The CPU fan is not ramping up to meet the heat requirements. The CPU fan stays a contant 2000rpm. Check board BIOS (A106), reflash BIOS A121 and still have 90°+ on IBT. Adjust BIOS for Manual control @ 100% and still same effect, way too hot. There is not any fan control with temperature on CPU header.
i went so far to plumb a molex 4-pin to fan 3-pin and jacked PSU voltage and it'd spin up to 3500rpm, momentarily and right back to mid-speed 2000rpm.
ok, contacted EVGA and was well appreciated and was enlightened on the control the P67 SLI has on a stock Intel heatsink fan. with the SmartFan control, it does belt full voltage to the fan, in my case, the stock fan looks to be "throttling" the fan speed. something within the fan there ahs got to be a secondary controller to control fan speed (inquiry @ Intel). the EVGA P67 SLI motherboard controls the fan speed of 2100rpm and can decrease with the preimeters set. like @:
60° duty to be 85% - 1800rpm
50° duty to be 70% - 1500rpm
40° duty to be 60% - 1250rpm
30° duty to be 50% - 1050rpm
so there is no concern with the EVGA motherboard at this time it is properly sensing and throttling the pwm to correct speeds, but well under spec of fan.
thank you EVGA for your help and pointing me in the correct direction.
i contacted Intel:
airdeano:
"I have a system build and have never been at ease with the temperatures with the stock cooler installed with no overclocking done. from past experiences (775) the cooler fan RPM (2500rpm+) would increase with temperature. this processor will cold boot a 3500rpm and down play to 2100rpm. with the motherboard (EVGA P67 SLI) Smart Fan manullay set to 100% fan speed, i am still at 2100rpm. apply direct 12v to the fan and it'll rev to 3500rpm and again settle to 2100rpm. i understand energy consumption, noise and ease of use, but this is not useful if the fan cannot be used @ 100% efficent if is "throttled" to only perform at 2100rpm. the original themal material was replaced after two months of operation in attacking this situation. with fan on maximum (2100rpm) the temps are:
ambient: 28°
system: 35°
CPU idle: 34°
CPU load: 96° (testing is 5 continious runs in Maximum w/7.5GB memory not extreme)
is the stock intel heatsink fan throttled to only achive 2100rpm in a 100% load condition?
does the fan speed increase if overclocked at a point?
thank you for your time and if, possible your answers
airdeano'
Intel response:
"The TCase for the Intel® Core i5-2550K is 72.6 degrees Celsius.
The TCase is a number established by Intel® as a point of reference in order to understand what could be expected as per normal processor temperature.
Anything from the Tcase and below will be the expected temperature of the processor in normal use, anything that doesn’t stress out the processor (watching movies, burning CDs, browsing the internet, creating documents, etc.) When the processor is stressed out meaning that you are running heavy processor applications that take control of the CPU or uses it at 100% the temperature will go beyond the Tcase. It can perfectly reach 80 to 85 degrees and the processor will still be OK. The cooling fan is in charge to keep that temperature there.
If the processor temperature reaches 100 degrees or more it will send a signal to the motherboard to shut down to prevent mayor damages and most likely it won’t be possible to turn the computer back in until it cools down.
The normal processor temperature will depend on the chassis type, the hardware involved and the location of the computer, and it usually is lower than the Tcase.
The Intel fan on these type of processors can reach around 2500 to 3000 RPMS, if the operating system determines that it is needed.
You can try installing the latest BIOS version for your motherboard, but as long as the system does not determine that there is an overheating issues, then the fan will not increase that much."
so my question is this fan assembly fried? any 15/17 sandies tested any stock factor fans?
intel says it is "functional" and my motherboard should be resposible for the fan information. which it said 100° and throttled down. id like to get a true temperature reading for the review and knowledge.
airdeano
