Nekochan Net

yup - but I'm not convinced that there would be a significant speed improvement on O2, as a lot of the speed degradation is I/O bound on O2... plus that 180 watt Sony power supply is a bit worrysome, and the fact that the innards run quite warm even with the 400 - warmer than Octane by quite a long shot.

I already popped an R12k-350 modded PM a while back while experimenting - and I think it was due to heat more than anything else.

(posted on a newly-minted R12k-400 O2)

what about overclocking an o2 r5k 200 mhz ?
Could i do something to change the clock freq. (maybe 250 or 300mhz).
Ideas?

_________________
Former: R10000 | | 600Mhz | R5000
Plastic City is back!!! >>> http://www.plasticcity.de

the 360 & 400 run at a lower vcore then the 250 & 300 I thought.

i have an o2 r12k 270 and a spare octane r12k-400 module. is it possible to put the 400 mhz chip into the o2 cpu module? what needs to be done?

didn't open any of the modules so far, just a thought.

Nope, the R12k chips over 300 MHz are ball grid array's, and are directly soldered to the board. The 300's and down are Land Grid Arrays and are socketed and thus can be swapped.

I'm thinking about experimenting the Oct R12K300 trasplant on an O2 R10K250...
Likely I'll mount a larger (but slower) fan on the module.
I'll keep people update on how the experiment goes.

Marco/Sat

First step completed: cpu swapped.
O2 boots and Hinv reports 250Mhz R12K
Next weekend I'll move the resistor to get 300Mhz

Marco/Sat

P.S: some thermal paste added

You'll probably be OK with stock cooling at 300 MHz

BTW I extracted the R12K from an Octane module.
And the O2 reports a 250Mhz R12K.

I doubt if OC (350) is worth the risk of killing the CPU (300)
I've 640MB on the O2 and firefox likes to spend time on CPU (a lot in system/wait). Opinions?

Marco/Sat

Slow mobo to cache memory transfers, this is fairly normal for an O2.

That's strange - did mine a while back (simple, just swapped the chip and changed two resistors) and poof !

Did you not get the resistor swap correct ? Seems to me it reported a 300mhz chip even with the 250 mhz chip installed if you changed the resistors. Not for long, tho - crashed pretty quickly

Joe-

I really appreciate all the hard work you have put into your SGI development and then sharing it in the forums. I'd damn near pay for you to have your own web site so I wouldn't have to dig through the forums to get the incredible information you share. Maybe Nekochan would consider giving you a page on their site. Maybe "joe's corner" or something....

Anyway, Thanks.

At first run I only swapped CPU, in hte near future I'll move resistors.
Hence it's perfecly fine that reports 250Mhz.

Marco/Sat

Help!

The pictures for O2 R10k -> R12k 300MHz CPU mod were removed from chicago-joe website. Please, share the pictures of the CPU mod that you have or send it to my email - mailto:konon@yandex.ru.

Regards,
Oleg

_________________
From Russia with love....

konon007 wrote:


I checked my server and the files are MIA. RCN (my POS host company) tells me they upgraded some of their HW and they have seen some "lost data problems".

I have a backup of all the pictures on a HD but I moved in early September and some of my computers are still in storage and I am getting them home and up and running as time allows. I don't know which O2 (or Octane) the files are on, but as soon as I find them I will replace them on my server with the same links.

Sorry for the inconvenience,

Joe