Pc ie extender customer presentation sept 2012

3M Electronic Solutions Division

3M™ Twin Axial Cable Assembly for PCI Express
Extender Card Applications

© 2012 3M. All Rights Reserved. www.3Mconnectors.com

Food Safety Division

Risers Cards and Extender Cables
 Sometimes system mechanical configurations force
add-in cards to be mounted in a different location
 Riser cards and extender cables help with that
 One PCI Express slot can also manage multiple PCI
Express cards

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Internal 3M™ Cable Assemblies for PCI Express
Applications with Flat Ribbon 3M™ Twin Axial Cable

• Supports Gen 1 - Gen 3 PCIe
• 85 ohm construction
• Target performance to support
PCIe Gen 4
• Space-saving, high-density design
• Folded 3D assemblies for advanced
packaging - custom
• Potential cost savings via FR4 and
re-driver elimination
• Other similar applications possible

3


Extender Card Applications

X8 X16

X4
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Available Options
 Six standard parts
X4 .25m 8KJ1-0727-0250
X4 .5m 8KJ1-0727-0500
x8 .25m 8KH2-0723-0250
x8 .5m 8KH2-0723-0500
x16 .25m 8KC3-0726-0250
x16 .5m 8KC3-0726-0500

 Other lengths available
 Shortest possible length: 120 mm
 Longest length: Undetermined – depends on
application

5


Signal Integrity
 We have a full SI report on .25, .5 and 1 m assemblies
 Everything in signal path consumes budget
― PCB trace, connectors, cable
― The more PCB trace used, the less budget for cable length
― Every system is different
 3M has generated a loss function to determine attenuation at
given length and frequency
― Determine channel loss budget
― Determine cable length
― Calculate cable estimated loss
― Figure into budget
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Loss Function
PCIe Differential IL
0

-5

-10
Differential IL (dB)

-15

-20

-25 0.25 m
0.5 m
-30 1m
2 m (Projected)
-35 3 m (Projected)

-40
0 1 2 3 4 5 6 7 8
Frequency (GHz)

 Data for 0.25 m through 1 m is average measured data at each length
 Data beyond 1 m length is projected with loss function generated from 0.25 m to 1 m
data:
― IL (dB) = (a0 + a1*length)*f2 + (b0 + b1*length)*f + (c0 + c1*length)
― Where: a0 = -0.1106 b0 = 0.0495 c0 = -1.2781
a1 = -0.0176 b1 = -1.0963 c1 = -0.1854
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Extender Card Applications – Storage Server

3M™ Twin Axial Cable Assembly for PCI Express Extender Card Applications to
rotated I/O card to fit in 1U (1.75 inch) box
PCI Express Extender to SAS controller card
Cables optimized to minimize obstruction to airflow
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Extender Card Applications – Storage Server

9


3M™ Twin Axial Cable Assembly for PCI Express Extender
Card Applications – Storage Server

10


Card Applications – Storage Server

11


Extender Card Applications – HPC with GPGPUs

2U server with extenders running to two GPGPUs
Orientation optimized to minimize disruption to airflow
Allows optimal location of add-in GPGPUs
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Extender Card Applications – HPC with GPGPUs

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Card Applications – HPC with GPGPUs

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15



16



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Ordering Information

 250 and 500 mm lengths are “standard”
 Custom lengths are available
Type Base
X4 8KJ1-0727-XXXX XXXX = length in mm
X8 8KH2-0723-XXXX XXXX = length in mm
X16 8KC3-0726-XXXX XXXX = length in mm

 Other options possible
 Distributor Stock – October 2012
 3M Cables Direct – October 2012
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3M is a trademark of 3M Company.

Important Notice
The information we are furnishing you is being provided free of charge and is based on tests performed at internal
3M laboratory facilities. While we believe that these test results are reliable, their accuracy or completeness is not
guaranteed. Your results may vary due to differences in test types and conditions. This information is intended for
use by persons with the knowledge and technical skills to analyze, handle and use such information. You must
evaluate and determine whether the product is suitable for your intended application. The foregoing information is
provided “AS-IS”. In providing this information makes no warranties regarding product use or performance,
including any implied warranty of merchantability or fitness for a particular use
Warranty; Limited Remedy; Limited Liability. 3M’s product warranty is stated in its Product Literature available
upon request. 3M MAKES NO OTHER WARRANTIES INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. If this product is defective
within the warranty period stated above, your exclusive remedy shall be, at 3M’s option, to replace or repair the 3M
product or refund the purchase price of the 3M product. Except where prohibited by law, 3M will not be liable
for any indirect, special, incidental or consequential loss or damage arising from this 3M product,
regardless of the legal theory asserted.

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Pc ie extender customer presentation sept 2012

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