Thermal
Ma
nagement Solutions for Intel Pentiu
m
®
II
High Performance Passive and active Heat Sinks for
Pentium
®
II Slot 1 Microprocessors up to 450 Mhz
Wakefield Engineering 828, 838, 848, 858 and 859 Series Heat Sinks provide maximum thermal performance
within industry standard ATX/NLX chassis design parameters for Intel Corporation Pentium
®
II microprocessors.
These heat sinks are designed for use in the latest generation of desktop, deskside, and server systems which uti-
lize Intel’s new Pentium
®
II family of microprocessors.
828-130AB
838-130AB
848-130AB
858-133AB
859-124D2
Product Fea
tures
®
Optimal thermal performance for ATX/NLX
standard PC chassis formats
®
Optional pre-applied DeltaLink
TM
V “phase
change” thermal interface material minimizes
temperature drop without the mess of thermal
compound
®
Five standard models accommodate various
airflow configurations
®
Standard clips easily and securely attach the heat
®
sink to the Pentium II SEC Slot 1 Cartridge
®
Attractive and durable black anodize finish
®
Reliable, 2-wire, 12 VDC ball bearing fan with
standard 3-pin connector (859 series).
(3-wire fan with speed sense lead available
as option)
®
Standard locating pins in heat sink base ease
positioning, minimizing assembly labor time
The 828, 838, 848, 858 and 859 Series heat sinks were developed by Wakefield Engineering to meet Intel’s stringent thermal and
mechanical requirements for the dramatically new packaging approach used in the Pentium
®
II.
Wakefield Engineering, Inc.
60 Audubon Road • Wakefield, MA 01880
Phone: (781) 406-3000 • Fax: (781) 246-0874
Web Site: www.wakefield.com • Email: info@wakefield.com
Refer to Full Line Catalog for additional
Heat Sinks and Thermal Accessory Products
Thermal Management
Solutions
for Intel Pentium
®
II
Hea Sink Selector T
t
able
Optimal Airflow Direction
Thermal
Resistance
Heat Sink
Model Number
at 200LFM
(°C/W)
# of
Fins
Weight
(grams)
Lowest
Pressure
Drop
Uni-
Directional
Transverse
Passive
828-130AB
838-130AB
848-130AB
858-133AB
Active
859-124D3
0.52
14
190
* When tested in transverse airflow direction.
OR
Uni-
Directional
Longitudinal
Omni-Directional
0.71
0.65*
0.84
1.00
21
20
10
8
152
166
231
207
Hea Sink Fea
t
tures/Specifica
tions Common to all Series
•
Nom Size: • 4.90" (124.5mm) length x 2.25" (57mm)
•
Slots to accept Wakefield 829SC Attachment Clips (2 clips
width x 1.30" (33mm)
required per heat sink)
fin height [for 828, 838, 848 Series]
•
When mounted to SEC cartridge with 829SC clips, the
• 4.90" (124.5mm) length x 2.05" (52mm)
assembly meets Intel shock and vibration specs
width x 1.33" (34mm)
•
Four holes to allow use of Rivscrew
®
brand fasteners as alter-
fin height [for 858 Series]
nate fastening method
• 4.90" (124.5mm) length x 2.29" (58.17mm)
•
Features in fin tips to accept heat sink support bracket
width x 0.892" (22.66mm)
•
Durable black anodize finish is standard, gold chromate
fin height (1.36" (34.5mm) overall height
is optional
including fans) [for 859 Series]
•
Optional, factory pre-applied thermal interface materials
•
Two 0.118" Diameter Locating Pins meet Intel SEC
are available
cartridge specs for Slot 1
®
®
How to Specify Model Number
Passive Solutions
828-130 AB S4
SERIES NUMBER
828
838
848
858
THERMAL INTERFACE MATERIAL OPTION
BLANK
S4
S5
NONE
DELTALINK IV
(BERGQUIST SOFTFACE)
DELTALINK V
(CHOMERICS T710)
Accessories
*
Attachment Clips must be ordered separately. For each heat
sink order 2 pcs of P/N 829SC.
*
To specify factory pre-applied thermal interface materials
add S4 or S5 suffix to heat sink P/N as shown.
®
®
HEIGHT
130 = 1.30 in (828, 838 & 848)
133 = 1.33 in (858 SERIES ONLY)
MATERIAL, FINISH
AB = ALUMINUM, BLACK ANODIZE
AG = ALUMINUM, GOLD CHROMATE
Also A ailable from
v
W
akefield Engineering
Active Solutions
859-124 D2 S5
Delete S5 suffix for no interface material
D3 for 3-wire fan
*
Custom Solutions - Contact Wakefield’s experienced
Applications Engineering group to discuss special Pentium
®
,
Pentium
®
Pro and Pentium
®
II applications which may
require customized thermal solutions.
Wakefield Engineering, Inc.
60 Audubon Road • Wakefield, MA 01880
Phone: (781) 406-3000 • Fax: (781) 246-0874
Web Site: www.wakefield.com • Email: info@wakefield.com
Pentium
®
is a trademark of Intel Corporation.
Rivscrew
®
is a trademark of Avdel Corporation.
Information subject to change without notice.
Copyright 11/97 Wakefield Engineering Inc.
D-239
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