IBM 7015-R50 Installation And Service Manual page 24

Cpu enclosure
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The next three types of memory cards are shown below. A two bank (8 slots) RLX card, a
four bank (16 slots) NFX card, and a four bank (16 slots) SF5 card. Each bank can house
four memory module kits composed of four memory memory modules each, which comply
with the JEDEC standard for 168 pin, ECC, 60 ns, 5 volt memory modules.
Bank 1
5
.
Bank 1
.
Bank 0
.
Bank 0
8
Two Bank RLX
Memory Card
Bank 2
9
Bank 1
.
Bank 2
Bank 1
.
Bank 3
.
Bank 0
16
Bank 3
Bank 0
Four Bank NFX
Memory Card
Bank 2
9
Bank 1
.
Bank 2
Bank 1
.
Bank 3
.
Bank 0
16
Bank 3
Bank 0
SF5
Memory Card
The figure below shows a standard memory module.
The following table indicates the memory module kits supported by RLX, NFX, and SF5
cards for R30, R40, or R50 systems, and it also shows the resulting memory capacity for
each kit:
Name of the Kit
MM32
MM64
MM128
MM256
The maximum memory reachable with this kind of memory card is equal to 1024MB, due to
the fact that up to four of the above indicated kits can be installed on the memory card.
It is not possible to install on the same RLX, NFX, or SF5 card memory modules belonging
to different kits.
1-10
Service Guide
Description of the Kit
4 modules of 8MB each
4 modules of 16MB each
4 modules of 32MB each
4 modules of 64MB each
Bank 1
1
.
Bank 1
.
Bank 0
.
Bank 0
4
Bank 2
1
Bank 1
.
Bank 2
Bank 1
.
Bank 3
.
Bank 0
8
Bank 3
Bank 0
Bank 2
1
Bank 1
.
Bank 2
Bank 1
.
Bank 3
.
Bank 0
8
Bank 3
Bank 0
Resulting Memory Capacity
32MB memory
64MB memory
128MB memory
256MB memory

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