FS: SGI Silicon Graphics O2 O2+ R12K 270Mhz MIPS CPU  - Page 1
Forum section: electronics / general

author: legacy
author_rank: Super Contributor
timestamp: July 23, 2014, 07:39:24 pm
content: for sale a great Silicon Graphics O2 R12K 270Mhz CPU module, Hardly Tested working, plastic bracket includedyou can Upgrade Your Silicon Graphics O2 System!You can install this module on both O2 and O2+ Systems easilyNo problem about that (1), and when installed it looks this way(1) the O2/O2+ mobo are compatible across all CPU families although there are different part numbers/revisions.to install an R12K CPU You need:- R10K/R12K PCI riser (you should have it)- R10K/R12K Backplate (you should have it)- updated PROM version (you should already have it)- the appropriate plastic CPU bracket (i include it)You can update the O2/O2+ with all the CPUs that are available for the computer.You should check that you have the right PROM version before installing the R12000otherwise the O2/O2+ will not bootThe last PROM is v4.18 and with it you should be able to install all the processors.The PROM is automatically upgraded when you install a new version of IRIX.IRIX 6.5.8 is absolutely perfect fine for the 270Mhz R12000I had that configuration during quite a lot of time and it worked just fine.any more questions ? contact me =)

author: kfitch42
author_rank: Frequent Contributor
timestamp: July 23, 2014, 08:07:50 pm
content: Wow!!! That is a blast from the past ... the memories. Back in college (late 90s) I worked in a lab where we had a bunch of SGIs (I think they were O2's) and I was amazed that they could beat (just barely) the PCs running at 5 times (IIRC) the clock rate. We also had a bunch of DEC Alphas (we even had a couple running WinNT, there was a very short period of time where the fastest way to run x86 code was on an emulator on an Alpha) ... it was a sad day when Intel effectively torpedoed the Alpha.

author: miguelvp
author_rank: Super Contributor
timestamp: July 24, 2014, 06:30:00 am
content: Quote from: kfitch42 on July 23, 2014, 08:07:50 pmFX32 never run the x86 code faster than native, it did keep optimizing the code but never got in par to the 486 for example.As for Intel torpedoing the Alpha chip, well, Intel got caught with their pants down with NDAd technology from DEC in their pentium, they "settled" by purchasing DECs IPNice thing about the Dec Alpha running NT is that they had Visual Studio that will generate native Alpha code, but only using 32 bitsIf you wanted to take advantage, True64 Unix or whatever it was call used the full chip including it's internal 128 bit databus.Edit: some trivia, the chief architect of Windows NT (WNT) was involved in developing VMS.So H.A.L is to I.B.M as V.M.S is to W.N.T. maybe an urban legend but funny nevertheless.As far as SGI O2 are those older than the Indigo series? I don't recall anymore.I did like SGI motto "we will never build a monochrome system" or something like that.Still DEC Alpha was the best (computational wise). But for example Allegro by Cadence was a beast on SGI under IRIX.BTW, any reason there is not a price on the board? or is it one of those that if you must ask you can't afford it?

author: legacy
author_rank: Super Contributor
timestamp: July 24, 2014, 12:12:06 pm
content: Quote from: miguelvp on July 24, 2014, 06:30:00 amIndigo is different from Indigo2O2 is the successor of Indy, as Octave/Octave2 is the successor of Impact/Indigo2Impact is an indigo2 machine expanded plus a R10K CPU moduleO2 is newer than indigo and impact, especially O2+the difference between O2 and O2+ is that O2 is R5K, O2+ is R10K or R12Kother differences are related to (1), see the quoteQuoteas successor of Octave, in the last modern line there are:- Fuel (1xR16K @ 600Mhz)- Tezro (4xR16K @ 800MHz)Irix is EOL since 2009, the last release was 6.5.30Quote from: miguelvp on July 24, 2014, 06:30:00 amsimply i forget it, i am asking 100 euro, it's a very rare CPU module

author: legacy
author_rank: Super Contributor
timestamp: July 24, 2014, 06:54:47 pm
content: the module looks like this

author: legacy
author_rank: Super Contributor
timestamp: September 30, 2014, 02:44:17 pm
content: Still for sale