[geeks] thoughts.

[Bill Bradford]

On Sat, May 04, 2002 at 07:11:58AM +0100, Chris Byrne wrote:
> 1. Would the SM520 be the fastest dual processor Mbus module that work with
> the SS20?

No, you'd want one of the dual 200 HyperSPARCs.

> 2. Which would be faster for a good mix of multi threaded applications, dual
> SM81 (2 procs total) or dual SM520 (4 procs total)?

I'd go for dual SM81.

> 3. Would two ross dual proc 142Mhz 1mb modules or two ross dual 125mhz 1mb
> modules work config and heat wise? As far as I can tell they are the fastest
> dual processor module with 1mb of cache.

THey'd work, you'd just want to do some testing and make sure they didnt
overheat the box.

> 4. Would I be correct in assuming that the massive increase in clockspeed
> would make up for the architecture differences between the HyperSPARC Ross
> modules above and the SuperSPARC-II sm81?

Not sure with the latest 1meg-cache HyperSPARCs.  However, from what I've
seen, a 100Mhz HyperSPARC w/256K is about equivalent to a SM61 (60Mhz/1meg).

> 5. Assuming I COULD get it to work heat wise would the 200mhz clock speed
> and larger l1 and othjer achitecture inprovemnts in the 620d make up for
> having half the cache at half the speed as the 620c 142Mhz modules? I have
> the suspicion that it wouldnt, but I may be wrong.

See above. 

> 6. Would one of the clones (say an axil s/420) have good enough, or be
> easily moddable to provide enough cooling for the quad 200mhz?

Just cut a hole in the top of the case and mount a 3" fan on there. 8-)

Bill

-- 
Bill Bradford     | "Fear leads to anger. Anger leads to hate.
mrbill at mrbill.net | Hate leads to using Windows for mission-critical 
Austin, TX        | applications." -- What Yoda *meant* to say