what accelerators are cool enough for A1200?

[delshay]

any 060 card with the last mask 71E41J will work with very little heat.

[delshay]

ah, too bad about Breathless.
Figured AB3DII wouldn't run, supposedly this barely runs on an 060.

there are some very very fast cards out there if done correctly this game should work..

some users have 68060 running @70Mhz+,their say appollo 68060 @80Mhz cards runs faster than Blizzard PPC card.

i think it about time to find out if this is true Blizzard PPC 68060@83Mhz.

[delshay]

Hi, I thought you may be able to answer this... I saw all your work on overclocking the Bliz. PPC cards, very impressive stuff! :-)

I have a Blizzard (Phase 5 rev. 1) 1260... wondered if I can overclock it to 66mhz and still keep it in the desktop case (without fan)?

Or do I need to tower my Amiga if I want to overclock the 060?

Also, can I use this 66mhz crystal from AmigaKit (http://amigakit.leamancomputing.com/catalog/product_info.php?cPath=45&products_id=167), and is their instructions on how to do it anywhere? (Any soldering required?)

Thanks, Alex.

it depends on what mask the 68060 is. if its mask 71e41j the processor will run cooler than other revision. ie no fan needed.

all 68060 should overclock to 66Mhz

the osc from amigakit will work.

RECOMMENDED: get a expert to desolder the old osc. don`t try it yourself unless you have very good soldering skills.

**all modification at your own risk**

[delshay]

Except my earlier revision mask 68060. It's max STABLE operating speed was 60Mhz. Now that i have the latest mask i can easily put on a 66Mhz osc. But i still use 60Mhz to be sure .

i don`t know what revision you have,but i have a few old revisions and every single one overclock`s to 70Mhz or even 72Mhz.

i also have MC68060RC66E which i use for testing. but don`t be fooled by the marking,as what`s mark on the outside is not always whats on the inside.  

every now and then i drop in a old revision as some my E41J 68060 has problems or maybe a fault with some of my processors.

look out for the marking on the left hand side of the processor ( E41J ) mine has S23328 004 and some end with 006,but some ( E41J ) end with 002.

i think 68060 has been clocked as high as 120-125Mhz,but here on my Blizzard PPC it has been clocked as high as 86Mhz.


marking also appliy`s to simms

the fastest EDO is 50ns,but don`t be fooled by the markings. there are some very poor 50ns simms out there.

there are some simms marked 60ns that out perform even simms that are marked
50ns so beware.

poor 50ns simms =47ns
good 50ns simms=45ns
very good 50ns simms=43ns
super excellent 50ns simms=?

very good=80mhz bus speed on Blizzard PPC card
Super excellent=83Mhz bus speed and above on Blizzard PPC card

this is why my Blizzard PPC card is as fast as a Cyberstorm 200Mhz and getting faster.


2nd fastest Blizzard card in the world.


68060@70Mhz 603e@320mhz ( 80Mhz bus ) with SCSI - 35Mhz PCI bus

ram settings all turned off in Blizzard menu ( DO NOT TRY THIS ON A VERY FAST CARDS WITHOUT **SPECIAL** PROPER COOLING ). you will damage the card.

[delshay]

The Apollo cards have a very fast memory bus, faster than the phase 5 cards.  In fact back in the day AIBB memory speed benchmark of my Apollo 68040 was quicker than a PPC/68060 board we had at the local user group, when by all accounts it should not have been.  

Apollo boards also have a blizkick-type utility call remApollo (on Aminet), and this lets you map the OS ROMS and other things like ftext and fblit into the fast ram.  It makes a huge difference in operating speed.  But get an '060 if you can.

 TBH I haven't experienced any whdload games that didn't work with it since I upgraded my 68040 Apollo to an 68060.

Blizzard PPC card has its memory settings turn off ie no read/write waitstate,this is what makes a difference between my modifyed cards and other modification,this can be 2 seconds + quicker with this setting,this is why i wanted to find out if it`s true if the apollo card is faster.

my modifcation is done around this setting,this is why my card is fast or even faster than a Cyberstorm 200Mhz which puts it in second place as the second fastest classic amiga card.

the Cyberstorm 233Mhz is under threat and *may* lose it crown as the fastest classic amiga card,as iv discoverd something else whats slowing down my card,im awaiting some test result.