Test of the standard boxed heatsink for Celeron 700

[ Index ]

Picture of the element >> .

Comments :

After spending weeks on creating the DD element the idea to test the standard element (boxed Celeron700) popped up. The Intel kit that followed the processor (fan and heatsink) is of very good quality. The testing showed that it is possible to use the standard element for fanless cooling of the processor and still operate within it's specs. This is possible with optimal Vcore settings and a decent cabinet temperature. Operation on the standard Vcore level however is likely to exceed CPU specs. An estimate of the CPU temperature at 1.7 Vcore level is a worst-case temperature of about 85 C.

Data :

Dimension : L60 x W54 x H28 (mm); where length is measured in the way of the retainer clip.

Model : Standard Intel FC-PGA Boxed Heatsink for Celeron II 700 etc.

Weight : 100 grams (fan kit 33 grams).

Material : Aluminium

Made for socket 370.

Cooling capabilities (verified) : 

• Intel Celeron II 700 ( Standard settings )
  CPU peak temperature : not measured
  CPU extreme temperature : estimated to be over 85 C @ 20 C ambient based on measurment.
  CPU Typical temperature : not measured
  CPU Idle temperature :  not measured
  CPU settings : 1.70 Vcore, 3.5 Vio, 66 MHz FSB
  
• 
  Intel Celeron II 700 ( Optimized w.r.t. HW acceleration & power consumption )
  CPU peak temperature : 62 C @ 26.0 C MB/Cabinet temperature.
  CPU extreme temperature : 66 C after + 2 hours of testing.
  CPU Typical temperature : 38 C
  CPU Idle temperature :  31.2 C @ 26.7 C MB/Cab
  CPU settings : 1.4 Vcore, 3.5 Vio, 66 MHz FSB
  
• Intel Celeron II 700 ( Optimized w.r.t performance )
  Limited overclocking abilities. System might fail without thermal control/management software or hardware.

Link to manufacturer : www.intel.com 

Measurement & Environment factors :

All temperature data are normalized to an ambient room temperature of 20 C.
Air humidity : Normal. Standard basement bedroom.
All measurements are done in a closed cabinet ( AOpen HQ-45 ), with highly optimized and improved natural ventilation. This setup is also referred to as system 2, and the hardware and configuration is described in detail elsewhere.
PSU used in this measurements is the " Link to a description of this unit when presantation ready" PSU(5), a 200 Watts fanless PSU.
The maximal operating temperature for a Celeron 700 FC-PGA CPU is 80 C. The highest temperature that can be measured by the probe and still be guaranteed to be withing the spec. are 76.0 C. This is due to probe inaccuracy, and possible  temperature variantions within the CPU core.

Definitions in the context of CPU element testing :

All temperatures are normalized to an ambient temperature of 20.0 C. This is done in a linear way, and gives error. In most cases the actuall temperatures and measurments varies about 2 degrees C around this temperature. However there are other factors that affects the accuracy of the measurents as well, such as air humidity and natural draft in the room. For all practical purposes it is as accurate as it is possible to get it in a real environment.

• CPU peak temperature : This temperature is found running a test program that seeks to maximize the overall powerconsumption of the system, by running intensive benchmarks on the CPU in addition to accessing peripheral devices.
• CPU extreme temperature : This temperature is found running a test program that seeks to maximize the powerconsumption of the CPU, by running intensive benchmarks on the CPU. No peripheral devices are accessed during this test.
• CPU Typical temperature : The temperature of the system with an average CPU load of around 25 %. Found by running an application or combination of appliactions that gives this load.
• CPU Idle temperature :  The temperature of the system when idle (but not in sleep mode). ACPI / SWC active. HDD would not normally be spinning, but migth. The typical value of this measurment, would normally lie just above the value for the motherboard.

Verified Test results and measurment details : see below

[ Index ]

Notes : Testing of the standard (boxed) element :

After spending weeks on creating the DD element the idea to test the standard element (boxed Celeron700) popped up. The Intel kit that followed the processor (fan and heatsink) is of very good quality. The testing showed that it is possible to use the standard element for fanless cooling of the processor and still operate within it's specs. This is possible with optimal Vcore settings and a decent cabinet temperature. Operation on the standard Vcore level however is likely to exceed CPU specs. An estimate of the CPU temperature at 1.7 Vcore level is a worst-case temperature of about 85 C.

Measurement Log : Standard Element(3) : Testing of heatsink at 1.4 Vcore, 3.5 Vio settings :

Note : Sample point taken at random, and not on event. All measurements done with closed cabinet, natural ventilation.

Finding peak temperature with SWC disabled (idle measurment) :

1:58 48 C Measurements starts
2:00 50 C
2:04 56 C
2:07 58 C delta .6 smthn estimate temp. peak 63 C in 40 min.
2:11 60 C
2:16 61 C delta .2
2:32 62 C delta circa. 0.0625 v 16 min pr. C
2:39 63 C
3:05 63 C Target reached. MB 26 C AMB 20.4 C

Finding extreme temperature with maximized CPU heat generation :

03:09 63 C starting warming. Instantly popped up one deg.
03:11 64 C
03:12 65 C
03:24 66 C After 16 min of testing.

< break, trouble >

Some alarm went off, just before reaching 65 C. BIOS was set to warn at 70 C,  I don't quite understand it. Anyway wrap it up and estimate peak temperature to be about 95 % of temp reached max. 69 C after hours.

Cause : it's the Winbond HW doctor alarm settings that go off, even though program has been shut down.

< measurements, continue >

03:58 66 C @ 20.8 C Ambient
04:12 67 C
04:34 67 C
04:50 67 C@ 20.8 C Ambient.

Warming stops after 1 hour 10 min, peak temperature 67 C @ 20.8 C ambient.

Standard Element(3) : Results for 1.4 Vcore, 3.5 Vio settings :

Intel Celeron II 700 ( Optimized w.r.t. HW acceleration & power consumption )
CPU peak temperature : 63 C @ 27.0 C MB/cabinet temperature. CPU S.T. (v6.0) mode : Normal Testing.
CPU extreme temperature : 67 C after 2 + hours of CPU Warming.
CPU Typical temperature : 38 C
CPU Idle temperature :  31.0 C @ 19.8 C ambient / 26.5 C MB/Cab
CPU settings : 1.4 Vcore, 3.5 Vio, 66 MHz FSB
Ambient temperature : 20.9 C (error  -0.5 C)

Normalizing results to 20 C ambient (approx -1 C)

Intel Celeron II 700 ( Optimized w.r.t. HW acceleration & power consumption )
CPU peak temperature : 62 C @ 26.0 C MB/Cabinet temperature.
CPU extreme temperature : 66 C after + 2 hours of testing.
CPU Typical temperature : 38 C
CPU Idle temperature :  31.2 C @ 26.7 C MB/Cab
CPU settings : 1.4 Vcore, 3.5 Vio, 66 MHz FSB