Indigo2 CPU woes
#1
Indigo2 CPU woes
I have been going through a bit of a saga with an SGI Indigo2

First, I ordered an Indigo2 off ebay as-is with the following description:

Quote:You are bidding on;
Silicon Graphics Indigo 2 CMNB007 (1992)
Model # CMNB007
This item is ***VINTAGE***
          (1992)
           AS IS, working
  
           2 Broken Clips on Front cover

           Silicon Graphics MotherBoard
           200MHz IP22 CPU Board R4400
           IP22 ASSY 030-8102-008 REV.B
           W/Heat Sink Card Attached
           89749:5
           22228487
           W/4x 8MB NEC SIMMs RAM (Bank B)
           72p 80ns 24c 1x4 Parity FPM SIMMs
           MC-422000A36FJ-80
           9302XE 94V0
           W/4x 32MB Kingston SIMMs RAM (Bank C)
           72p 60ns EDO SIMM  5v Parity
           KSG128/R40
           Kit of 4-03217
           W/Graphics board
           GR3-XZ (X/Z Graphics)
           VB2 ASSY 030-8105-005 REV C
           Assy No.030-8103-005 REV C
           VT4493
           W/5.25 SCSI Drive Bay
           FH 5.25 BKPLN ASSY 030-8114-004 REV.B
           91766 04
           W/Seagate Legacy
           Fast SCSI HDD
           535 MB
           ST3610N
           SGI Part No. SGI-9410828-B
           952002-031

When I read this, I see 200 MHz R4400 w/ heatsink card attached, and I figure I'm getting a 200 MHz CPU. What I actually got is a 100 MHz R4000. I'm still talking to the seller about this, in addition to some damage sustained during shipping.

In the meantime, because 100 MHz is really quite slow, I ordered a 250 MHz R4400

Quote:This processor was removed from a Purple Indigo2  - CMNB007Y125 that would not boot


The new CPU part number is 030-0808-001, which SGI depot lists as a 250MHz CPU. I just plugged it in; while it certainly works, it only reports as 200 MHz (2MB). So now I'm wondering, is my motherboard limited to 200 MHz? Do I need an updated PROM to use the full 250 MHz? I haven't seen anything about that anywhere, and I feel like I've done a fair bit of reading.
(This post was last modified: 04-06-2020, 05:05 PM by nintendoeats.)
nintendoeats
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04-06-2020, 04:20 PM


Messages In This Thread
Indigo2 CPU woes - by nintendoeats - 04-06-2020, 04:20 PM
RE: Indigo2 CPU woes - by jan-jaap - 04-06-2020, 05:15 PM
RE: Indigo2 CPU woes - by nintendoeats - 04-06-2020, 05:27 PM
RE: Indigo2 CPU woes - by nintendoeats - 04-06-2020, 08:16 PM

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