68060

[alex68]

Cpu 68060 is posible overclocking at 100 mhz or more? Regards

[grond]

The last mask of the 060 can often be overclocked to something in the range of 100-120 MHz.

[alexh]

To overclock to 100MHz and beyond the chip has to be a REAL MC68060RC50 with a mask with "E41J" in it. There are lots of fakes, so when you read the PCR register the version field must say 6. (Several Amiga tools will read the PCR register and print out this value such as CPU060)

Stability at above 50MHz though is not only the CPU but also be down to the quality of the design of the accelerator card and the speed of your DRAM.

Most accelerators have a fixed clocking relationship between the CPU frequency and the DRAM frequency meaning you need the fastest DRAM you can (50ns or lower) The RAM controllers on *some* of the phase5 products have configurable RAM timing. They have the command setmemmode.

For example the Apollo 1260 and 4060 are reportedly good overclocking cards. But if they were early versions or upgraded from Apollo 1240/4040 cards the the speed of the CPLDs and the timing of the designs inside them are poorer and they tend not to overclock as well. An indicator of cards more likely to overclock stably is the revision of the MACH chips on the boards, later revisions of Apollo use MACH131 chips as opposed to MACH130 chips for at least one of the CPLDs.

[alex68]

the latest mask can go up to 120 mhz?

[grond]

Originally Posted by alex68

the latest mask can go up to 120 mhz?

I know of one (1) 68060 that was successfully clocked to 124 MHz for a short time and involving a lot of cooling. There may be others. Known good rev6 060s have recently reached more than 400€ on ebay.

[alex68]

impressive 124 mhz has any screenshot to how many mips or megaflops?

[alexh]

Originally Posted by alex68

impressive 124 mhz has any screenshot to how many mips or megaflops?

https://www.a1k.org/forum/index.php?threads/57243/

132.9MHz
105.06 MIPs
75.33 MFlops

But the author mentioned it was not fully stable above 110MHz.

[trixster]

107mhz here on a CT60e in an Atari Falcon

Fastest Amiga one i have is 96mhz on a WarpEngine.

Some 060s on a Warp1260 will do 105mhz

[StevenJGore]

(Sorry ignore me, got my facts wrong!)

[alex68]

132 MHz is the maximum achieved in the 68060?

[Lord Aga]

No, 133.

[alex68]

Thank you all for your support. I would like to know if Motorola only made the 68k and 88k series or did other chips? regards

[trixster]

https://en.m.wikipedia.org/wiki/Cate...icroprocessors

[alexh]

Originally Posted by alex68

I would like to know if Motorola only made the 68k and 88k series or did other chips? regards

PowerPC and Coldfire

[alex68]

The powerpc was not from ibm? The coldfire how many mhz has I ever heard of it?

[DamienD]

Can I ask why this thread was posted in Amiga scene?

Surely it belongs in Support.Hardware.

[quantum8]

Originally Posted by alex68

The powerpc was not from ibm? The coldfire how many mhz has I ever heard of it?

Motorola and IBM made both PPC CPUs as part of the AIM alliance.


Jump on wikipedia and all the information is there and more

[alex68]

Does the 68060 at 105 mhz work fine?

[Jope]

Originally Posted by alex68

Does the 68060 at 105 mhz work fine?

This really depends on the chip you have and whether it has cooling or not. Some do, many do not.

[Rotareneg]

Considering OP's post history, I wonder if they're actually an 680x0 CPU that has became sentient and has some kind of self-esteem issue about their own clock speed.