exxos's Atari, Amiga & retro forum

Hello, i have problem overclocking my TF1260 with 68060 rev.6. I can set maximum 75MHz, over this value card/amiga froze. But most users can use rev.6 with 80 or maximum 100MHz. Where is problem?

Thank you

Not every 060 is going to be the same, only 50Mhz (or 60 if you're really lucky) is guaranteed on full 060s. 75Mhz is still a good overclock.
Each 1200 is different, motherboard board rev, timing fixes, caps etc.
Also the PSU, is it a 4.5amp on the 5v line. Has it been recapped etc.
Do you have cooling on the CPU? Do you have a high ambient temp in your location?

As there are no Amiga people online currently I will give some general information meanwhile.. I'm not an expert on Amiga or TF cards but I have tested a LOT of 060 CPU's over the years.

Firstly, are you sure you have a genuine rev6 ? REV1-REV4 will max out generally at about 75MHz.

Also overclocking is very hardware dependent. Those CPU's are 50MHz parts so you already got a overclock of 75MHz. Some CPU's can push further but not all.

You do of course need to do the usual sensible things like have a heatsink and fan on the CPU. You don't give any specifics of how you have your board set up.

I would also check the other threads as other people have mentioned overclocking and various firmware updates.

https://exxosforum.co.uk/forum/search.p ... %5B0%5D=65

yes, i bought rev6 from my friend. WhichAmiga told me that CPU is 68060 rev 6. So i thing is not fake... But over 75MHz i can't go. Maybe problem is with revision of my TF1260... i don't know. I will try CPU in another card or in A4000 BFG9060.

Might be the RAM too, I've found them quite sensitive to changing that.

I've never seen a TF1260 work at 75Mhz. 94 is the most likely to work and try some phase options... PHASE=? where ?=0 to 3

terriblefire wrote: 26 Dec 2022 21:40 I've never seen a TF1260 work at 75Mhz. 94 is the most likely to work and try some phase options... PHASE=? where ?=0 to 3

He's probably running the Beta firmware, and that's why it caps out at 75. Or a wrong version of the cpuspeed command.

I have firmware 999. So, where can i download cpuspeed tool, but another version? And is somewhere manual for this tool? (for phase option explanation, etc).
Thank you

alenppc wrote: 27 Dec 2022 02:30

terriblefire wrote: 26 Dec 2022 21:40 I've never seen a TF1260 work at 75Mhz. 94 is the most likely to work and try some phase options... PHASE=? where ?=0 to 3

He's probably running the Beta firmware, and that's why it caps out at 75. Or a wrong version of the cpuspeed command.

If you have the means to re-flash firmware to the TF1260, then you will benefit from updating to the last Alpha release

Link to thread below
https://exxosforum.co.uk/forum/viewtopi ... =75&t=4947

lioneer wrote: 27 Dec 2022 11:21 I have firmware 999. So, where can i download cpuspeed tool, but another version? And is somewhere manual for this tool? (for phase option explanation, etc).

Who is your builder? They should provide you with all this info.