With the standoffs in place it's now the a simple matter of
placing the heatsink on top of the processor and screwing the nylon screws
into the standoffs. The one thing we must do when tightening down the
screws is follow the set pattern as recommended by Swiftech. They recommend
that you position the heatsink where you want it, then using one hand to
hold the heatsink in position use the other hand to use the 7/16" Allen Wrench
to get each of the four screws started. Once all four of the screws have
been started your hand can be removed.
To insure that equal pressure is applied to the motherboard
the pattern for tightening the four screws must follow a set pattern,
looking at the diagram above you can see that each corner is given a number
that you will you use to determine which screw you move to next when
you tighten the heatsink on to the motherboard. The pattern you would use is
1 - 3 - 2 - 4, following this pattern you can be certain that the heatsink has the
best possible contact with the processor and also is putting the least
amount of strain on your motherboard.
Once the nylon screws have been turned to the point
that they have bottomed out in the stand off you are done with this
phase of the installation. The next part of the installation
will be choosing the type of fan you are going to use for your
particular system. Here is some information provided by
Swiftech that might make your decision making a bit easier.
The MCX775-V™ heatsink is intended to cover the
widest possible variety of uses, from low noise to serious
overclocking operations. As such, it is sold without fan to allow
users to customize the product to their particular application.
For user convenience, we separate all our bench
tests into 3 distinct categories characterized by the fan's audible
noise level:
Low noise operations: ~28 dbA - For
non-overclocked processors. The MCX775-V™ surpasses all known
temperature specifications published by Intel® to this date.
Nonetheless, due to the high thermal load requirements of the Intel®
Pentium® 4 "Prescott" class processors, minimum 30 CFM fans are
required.
Medium noise operations: 29 dbA to 40 dbA -
For mild overclocking levels depending on the fan selected, or high
temperature environments. Up to 110 Watts processor load.
High noise operations: 40 dbA and up - For
serious overclocking depending on the fan selected, up to 130 Watts
processor load.
| Silent to
low noise category - Lower C/W is better |
| Brand |
Size
(mm) |
Part #
|
CFM
|
dbA
|
Heatsink-fan
°C/Watts ratio (*) |
| Delta |
80x25
|
AFB0812M
|
31.4
|
28
|
.250
|
| Medium
noise category - Lower C/W is better |
| Brand |
|
Part #
|
CFM
|
dbA
|
Heatsink-fan
°C/Watts ratio (*)
|
| Delta |
80x25
|
AFB0812HH
|
37.4
|
34
|
0.226
|
| High noise
category - Lower C/W is better |
| Brand |
|
Part #
|
CFM
|
dbA
|
Heatsink-fan
°C/Watts ratio (*)
|
| Vantec |
80x38
|
TD8038H
|
84.1
|
55.2
|
0.145
|
* C/Ws shown are the heat sink to air values,
excluding thermal resistance of the TIM joint, which will vary
depending on the thermal interface used and bench test conditions.
For reference, Swiftech's TIM joint bench test value is 0.09°C/W.
All tests are performed in an environmental chamber using Industry
standard procedures, and calibrated equipment.
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