Overclocking and going too far with old tech, am I mad or what ?

  • Thread starter Thread starter lostrego
  • Start date Start date
  • Replies Replies 12
  • Views Views 307
lostrego

lostrego

Member
AmiBayer
Joined
Apr 4, 2011
Posts
722
Country
Spain
Region
A Coruña
Hi there.

For some time the idea of overclock like hell my Cyberstorm MKII 060 is on my mind.

Since I got a nice rev.6. 060 I was somehow limited by the memory speed as the memory bus runs at the same speed than the CPU, so with 60ns SIMMS the top speed at those run happy is 66Mhz (maybe you can force to a max of 70-72 Mhz but thats all), so for anything in the 80 Mhz speeds range 50ns SIMMS are needed.

So I finally found 3 nice SIMM modules of 16MB 50ns old style 8 ram ICs single-sided simms at a "reasonably" price but well that's only 48MB in total...

But... looking a the RAM ICs there and considering that the SIMMS have nice pads on the other side for soldering 16MB more on each SIMM I was thinking in doing some custom made 32MB 50ns SIMMs for a whopping total of 96MB, as I already found the correct ICs on a chinese supplier, so the question is in the air...

What do you think: I'm just too bored and taking it too far (like: I'm quite :nuts:) or do you see there a nice cool challenge (like: :ninja:) ?
 
@lostrego

Consider yourself fortunate to have an accelerator which can be over-clocked as far as the Cyberstorm. If all you need is faster memory and a new oscillator than you should be happy and thank your lucky stars! ;)
 
if you do it, make sure to take pictures before, in between and after. :cool:
Interesting!
 
Well I'll take some pics once I manage to put my 4000 in working order (it lacks PSU now), I've already tested 80Mhz on it before but with 60ns SIMMs, It even booted ok but once it loads the setpatch's rompatches and reboots then it crashes.

Now I'll do some tests with the new 50ns SIMMs, I assume that if everything goes ok there will be no problems for it running at 80 Mhz.

I'm also very curious on how it will behave the 80Mhz with the IDE PIO2 mode hack that I've on my 4000, considering tha the CS MKII behaves particularly well with this hack (already giving 4.1 MB/s with the 060 at 66 Mhz) and with that PIO2 hack the transfer speeds are strongly relative to CPU speeds I want to see how far it can go. :)

But again 48MB seems a bit low memory quantity for me (mainly because I have on it 96 MB of 60ns. mem already).
 
Just recently COSMOS made his own 40ns 128Mbyte SIMMs. Might be worth contacting him?

http://leblogdecosmos.blogspot.co.uk/2012/04/simms-40ns.html

Ratte over at a1k.org discovered that power was a big thing WRT overclocking the Apollo 4060. By supplying power direct from the PSU (like some graphics cards today) rather than from the CPU slot that it would run stable at 100MHz. I don't know if this is applicable to the Cyberstorm MKII.
 
@alexh : Yep I've seen that Cosmos entry and was a nice hack there, I was thinking in something alike but by adding more mem to an already existing 16MB 50ns ram module, the main problem was finding the correct IC but seems that those are quite easy to find (I've quoted that chinese supplier already for prices) and also I'm gathering spreadsheets documentation on those kind of simms (I've found that every DRAM IC needs a 0.1 - 0.22 uF SMD capacitor and more useful info).

And for Cyberstorm MKII albeith of the 3.3V massive power drain of a vastly overclocked 060 (that's another story) the problem with the CS MKII was more relative to RAM speeds, the apollos can be overclocked that far as the trick involved on this implies setting the memory bus at a half of that CPU speed so on a 100Mhz CPU the RAM is running at 50Mhz (a 60ns SIMM will work happy there).

But AFAIK with the Cyberstorm MKII the RAM bus speed is glued directly to CPU speed so once you pass the 66 Mhz limit on a 60ns ram you are asking for problems, that's it. :)
 
Are their any faster ram chips with the same pinout? 40ns etc?

I'd check, but on my phone at the moment :-)


Sent from my iPhone using Tapatalk. Please excuse any crazy auto corrects or lack of detail (links to info sources)
 
@Bad_Ad84

Dont know really, the DRAM ICs on that 50ns modules that I've got are 24 pin SOJ package IC Samsung (SEC) part nº: [FONT=宋体]KM44C4104CK-5


I tried to search with the -4 suffix but I've no conclusive results[/FONT] so I can not tell :huh:
 
mjnurney said:
go for it but just don't break anything!
Click to expand...

This made me chuckle:p:D. It is always a good idea until something goes wrong, but still, a) wouldn't life be boring without a few risks, and b) tinkering with stuff is how everything moves forward I guess :thumbsup:
 
ad-rs1600i said:
This made me chuckle:p:D. It is always a good idea until something goes wrong, but still, a) wouldn't life be boring without a few risks, and b) tinkering with stuff is how everything moves forward I guess :thumbsup:
Click to expand...

LOL! I broke my C= A2630 and A3640 accelerators... then I fixed them... then I broke them again. Now they run @ 50 MHz! :cool:
 
SpeedGeek said:
ad-rs1600i said:
This made me chuckle:p:D. It is always a good idea until something goes wrong, but still, a) wouldn't life be boring without a few risks, and b) tinkering with stuff is how everything moves forward I guess :thumbsup:
Click to expand...

LOL! I broke my C= A2630 and A3640 accelerators... then I fixed them... then I broke them again. Now they run @ 50 MHz! :cool:
Click to expand...
That's really cool - and a lot of satisfaction bringing them back from the dead again!!:thumbsup:
 
You must log in or register to reply here.
Back
Top Bottom