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All fansinks are the same . . .  well, all Golden Orbs are the same when they leave the Thermaltake plant: burningissues has just repeatedly tested two of them over twelve weeks on different CPU's at different vcores & they are EXACTLY the same. What's more, we've checked these tests against some carried out by a public-spirited fansink maker/designer who uses all sorts of expensive precision measuring-widgets; & his & our results agree within a couple of %

All of us know that if one of these two GOrbs goes onto a friend's machine they'll see different temperature readouts from their copy of MotherBoardMonitor; but the basic efficiency of the fansink - it's ability to wick heat from a CPU & radiate it into the airflow in a computer-case - has stayed, of course, EXACTLY the same. 

This efficiency can be given a numerical value: it's called C/W "sink-to-air" - C/W s-a for short. It's the same number if worked out from our test-system, or in any other properly monitored system anywhere in the world. It's this portable & objective figure that burningissues & the fansink-maker compared.

To find out this efficiency you need a few accurate figures: 

1) the CPU type, speed, vcore, & package-temperature 

2) the temperature of the air in the computer [or room if you leave the case open]

3) the heatsink grease thermal resistance & thickness.

- you'll also need 90 seconds with a calculator.

What you'll find - if you measure CPU-temperatures through-case - is that the C/W s-a for all & any GOrb's is 0.490 on a PPGA, 0.515 on a FC-PGA/Duron/TBird. If there's an error due to our methodology, it'll be towards being too optimistic [too low a figure] - this is because we don't measure the CPU-cap adjacent the core ["tcase"], but right through the CPU-package ["bcase"] - just like your mobo-sensor does but a helluva lot more accurately.

We said above: "all fansinks are the same" . . . . . but all fansink tests are not: here's some data from a spreadsheet we prepared after going to Google Advanced Search & punching in: "Golden Orb" + test : every published GOrb test found with an adequate quantity, if not quality, of information is included in the table below.

 

TEST

C/W s-a

C/W s-a

Test

Free

Test CPU

Real CPU

Test CPU

Real CPU

CPU

CPU MHz

CPU MHz

vcore

vcore

Watts

Watts

CPU cap

joint c-s

Kcm

C/W

Ambient

Ambient

CPU @

CPU

C/W j-a

SITES

from test

actual

Error %

Y/N?

temp C

temp C

temp F

temp F

Model

default

clocked

default

clocked

default

actual

area cm2

in cm

joint

joint

[room] C

[case] C

100% C

Delta C

from test

1

-0.028

0.490

106

Y

28.00

48.49

82

119

PPGA

300

504

2.00

2.30

17.8

39.55

6.25

0.0050

0.009

0.089

25.60

28.00

2.40

0.061

2

0.035

0.515

93

Y

36.00

53.48

97

128

FC-PGA

567

850

1.50

1.75

17.9

36.44

1.05

0.0020

0.009

0.212

26.40

27.00

36.00

9.00

0.247

3

0.038

0.515

93

Y

26.85

36.47

80

98

FC-PGA

550

616

1.65

1.67

17.6

20.19

1.05

0.0020

0.009

0.212

21.80

26.85

5.05

0.250

4

0.082

0.515

84

Y

45.00

72.08

113

162

TBird

1000

1100

1.75

1.79

54.3

62.49

1.05

0.0020

0.009

0.212

26.67

26.67

45.00

18.33

0.293

5

0.100

0.515

80

Y

29.00

38.58

84

101

FC-PGA

700

700

1.65

1.65

23.1

23.10

1.05

0.0020

0.050

0.038

25.80

29.00

3.20

0.139

6

0.121

0.515

76

Y

29.10

37.50

84

100

FC-PGA

500

667

1.65

1.65

16.0

21.33

1.05

0.0020

0.009

0.212

19.70

22.00

29.10

7.10

0.333

7

0.152

0.490

69

Y

47.00

62.89

117

145

PPGA

400

600

2.00

2.30

23.7

47.01

6.25

0.0070

0.009

0.124

25.50

34.00

47.00

13.00

0.277

8

0.154

0.490

69

Y

28.70

36.81

84

98

PPGA

433

433

2.00

2.00

24.1

24.10

6.25

0.0070

0.009

0.124

19.70

22.00

28.70

6.70

0.278

9

0.182

0.515

65

Y

36.00

44.78

97

113

FC-PGA

600

800

1.65

1.65

19.8

26.40

1.05

0.0020

0.009

0.212

25.60

36.00

10.40

0.394

10

0.205

0.515

60

N

33.00

41.18

91

106

FC-PGA

700

800

1.65

1.65

23.1

26.40

1.05

0.0020

0.009

0.212

22.00

33.00

11.00

0.417

11

0.213

0.515

59

N

37.00

47.68

99

118

FC-PGA

700

900

1.65

1.80

23.1

35.35

1.05

0.0020

0.009

0.212

22.00

37.00

15.00

0.424

12

0.221

0.515

57

N

32.00

38.79

90

102

FC-PGA

700

700

1.65

1.65

23.1

23.10

1.05

0.0020

0.009

0.212

22.00

32.00

10.00

0.433

13

0.243

0.515

53

N

31.00

36.39

88

97

FC-PGA

700

600

1.65

1.65

23.1

19.80

1.05

0.0020

0.009

0.212

22.00

31.00

9.00

0.455

14

0.255

0.515

51

Y

47.00

61.13

117

142

TBird

1000

1000

1.75

1.75

54.3

54.30

1.05

0.0020

0.009

0.212

21.67

21.67

47.00

25.33

0.466

15

0.245

0.490

50

?

43.00

51.20

109

124

PPGA

367

550

2.00

2.03

21.7

33.53

6.25

0.0070

0.009

0.124

30.60

43.00

12.40

0.370

16

0.370

0.490

24

?

37.00

40.39

99

105

PPGA

533

533

2.00

2.00

28.3

28.30

6.25

0.0070

0.009

0.124

19.00

23.00

37.00

14.00

0.495

17

0.383

0.490

22

Y

35.00

38.47

95

101

PPGA

367

550

2.00

2.00

21.7

32.55

6.25

0.0050

0.050

0.016

22.00

35.00

13.00

0.399

18

0.455

0.515

12

N

40.00

41.95

104

108

FC-PGA

533

840

1.50

1.65

17.1

32.59

1.05

0.0015

0.070

0.020

22.00

24.50

40.00

15.50

0.476

19

0.464

0.515

10

N

39.00

40.52

102

105

FC-PGA

533

800

1.50

1.62

17.1

29.92

1.05

0.0015

0.070

0.020

22.00

24.50

39.00

14.50

0.485

20

0.492

0.515

5

Y

57.00

58.19

135

137

Duron

650

900

1.50

1.85

24.3

51.18

1.05

0.0020

0.009

0.212

21.00

21.00

57.00

36.00

0.703

The following two entries are typical results from burningissues' recent test-series on two similar CPU's with  two  Golden Orbs

CPU#0

0.488

0.490

n/a

N

42.90

42.98

109

109

PPGA

367

550

2.00

2.04

21.7

33.86

6.25

0.0050

0.070

0.011

21.50

26.00

42.90

16.90

0.499

CPU#1

0.491

0.490

n/a

N

44.10

44.07

111

111

PPGA

367

550

2.00

2.11

21.7

36.23

6.25

0.0050

0.070

0.011

21.50

25.90

44.10

18.20

0.502

For some reason, maybe due to calculator-allergies, you don't see C/W s-a figures in the innumerable fansink tests posted up on hardware sites. It's a pity, because this is the only measure which might be called a fact, & is of real use to every reader worldwide.

We'll leave any comments on the standards of accuracy of h/w sites' testing-procedures to those living in unglazed houses; but an amusingly true point about the dangers of having dangerously hot components in your system was made by Kyle of hardocp:

"I think the graphic tells the entire story.  At 143, you are going to have a hard time holding onto the HSF with an uncovered hand.  If you can hold onto it for a few minutes your hands are probably very calloused and you are simply reading this during a recovery period." 

 - as you see; several GOrbs in the tests above were running - usually unknown to their testers - at temperatures around 140F-160F

BTW - most h/w sites publish "comparative" tests: the idea presumably being that even if the facts are wrong, they're the same wrong for all, & we can still get an idea of which fansink is better or worse. Looked at in another way, it's a scatter-gun approach, in the hope they'll hit at least one of the damn things while blazing away in the dark.

Weeeeeell: if you see a road-test of a Volks & a Corvette; you're unsurprised to read the Corvette is quicker. If at the same time you're told the Volks' top speed is 375mph  . . . . . . . . . . makes you wonder about what road they're heading down & what map they're holding up.

< Taking your Computer's Temperature [howto]

 Hot Air [analysis of measuring techniques] > 

Calibrating MotherBoard Monitor(s) [howto & data] >>

copyright shoarthing November 2000 for Burningissues.net - all rights reserved - with thanks to Andrew Lemont: a man who values fact.

 

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