Motorola 68060

[alex68]

The 060 what is the limit 110 MHz? Míps? Regards

[Minuous]

IIRC they go up to 75MHz without overclocking.

[derSammler]

Yes, but only EC/LC. Full ones were never spec'ed higher than 66 MHz.

Using both integer units gives 80 MIPS at 50 MHz (linear scaling, so 160 MIPS at 100 MHz etc.).

[alex68]

Can it be overclocked up to 100 MHz and be stable? Or can it go up to 110 MHz? Motorola's information gives 110 mips at 66 mhz at 100 mhz 78 mips, how is it possible? regards

[derSammler]

Originally Posted by alex68

Can it be overclocked up to 100 MHz and be stable? Or can it go up to 110 MHz?

There is no "it". Every single CPU has different headroom for overclocking. Many won't overclock at all, others can run at twice the speed. Keep in mind that even with the best cooling, however, overclocking always reduces the lifetime of the CPU. Given how rare and expensive 68060s are, I would recomment getting a Vampire or PiStorm instead if all you care about is maximum speed. We should not fry valuable CPUs for fun...

Originally Posted by alex68

Motorola's information gives 110 mips at 66 mhz at 100 mhz 78 mips, how is it possible?

What do you mean? If you get 80 MIPS at 50 MHz, you get 110 MIPS at 66 MHz... MIPS is raw CPU power and scales linearly therefore, as already written.

[eXeler0]

@Der_sammler fair warning, search the forum for old posts frim alex68 and 68060. ;-)

[Photon]

Latest mask full CPUs get less warm and if you're lucky, you can find uncommon individual CPUs that can boot in 100MHz with air cooling, the rest will have a top speed of between 80 and 100, say average 92 maybe.

I say boot because it must also survive a long CPU benchmark. I don't know any, but you can write a simple script to keep compressing big files from RAM: to RAM:, it's a good stress test, but the FPU won't be tested. Maybe convert JPEG or raytrace?

For some cards, the other chips or RAM bandwidth are the bottleneck and you can only go 66.

For EC and LC the speeds might go higher, but I don't know which masks are cool running.

[TCD]

Originally Posted by eXeler0

@Der_sammler fair warning, search the forum for old posts frim alex68 and 68060. ;-)

Holy mackerel...
[ Show youtube player ]

[alex68]

An 060 accelerator card can raise the clock up to 100 MHz and the mips are 78. I also read that an 060 at 110 MHz gets 219 mips? Is that true? Can someone explain it to me? greetings

[alex68]

Originally Posted by TCD

Holy mackerel...
[ Show youtube player ]

A brother of mine died and I was depressed for many years, okay?

[TCD]

Originally Posted by alex68

A brother of mine died and I was depressed for many years, okay?

Not sure that explains this thread. I would like you to read Jope's comment in the last thread that you created about this topic: https://eab.abime.net/showpost.php?p...9&postcount=88

[alex68]

I asked that because I saw a black 060 that said 133 but then I found out that it was fake. I would also like to know a comparison of Intel with Motorola because a friend told me that Intel was better at scaling clock speed and I really like the architecture. 68k and so it ended in 040. 060 was for embedded systems and there wasn't much information and that's why I asked you.

[alexh]

A lot of the issues with over clocking Rev6 68060 to 100MHz is the logic on the accelerator, particularly the DRAM controller was never intended to run at that speed. More modern 060 accelerators with designs timed for 100MHz using SDRAM should be more reliable

[alex68]

Originally Posted by alexh

A lot of the issues with over clocking Rev6 68060 to 100MHz is the logic on the accelerator, particularly the DRAM controller was never intended to run at that speed. More modern 060 accelerators with designs timed for 100MHz using SDRAM should be more reliable

Thanks for listen.

[VladR]

This topic keeps popping up all the time. Why exactly do people risk OC'ing the absurdly expensive unobtanium for [what amounts to] 0.000000001% performance of modern CPUs ?

And I have been OC'ing my whole life - but it's different when the CPU you fry can be ordered instantly online...

Still, there's a very finite amount of them in circulation and clearly, there's not enough around even for the Amiga fans (given where the price has crept up).

[Calabazam]

The Amiga OS is really smooth at higher speed. It shines with the Vampire V2 which is roughly equivalent to a 68060@200MHz. I have not really used PiStorm so far but it surely does.
Unfortunately, big boxes Amiga don't have either of them.
Hence the need for more speed, for now only reachable via the Rev6 68060.

[cloverskull]

Give me an equivalent to a 68060 in FPGA or any other means that has full FPU and MMU and zero compatibility issues and I'll stop trying to overclock my 68060s and use that instead

[Photon]

Originally Posted by alex68

An 060 accelerator card can raise the clock up to 100 MHz and the mips are 78. I also read that an 060 at 110 MHz gets 219 mips? Is that true? Can someone explain it to me? greetings

Nobody can explain it until you share the sources with context for the figures. E.g. on Wikipedia there are no figures for higher than 75 MHz.

MIPS depends on the mix of instructions, but much less so on the 68060 than previous Motorola CPUs, and much less so compared to multi-core CPUs, where it's very artificial to find a CPU that can load each core with equal work, whereas the 68060 can keep both pipelines filled with general-purpose instructions for the same sequential program for long loops.

68060 is a beautiful CPU inside. Its RISC core was cutting edge in 1994 and compares favorably to of-the-time-and-later leading CPUs, WRT instructions per cycle per core (see column 4 here).

[Calabazam]

Yes but PiStorm for A3000/A4000 seems a long road, and even project of Vampire (V4) for bigbox seems to have vanished.
Best hope is Z3660 with the fast 68040 emulation.

[Karlos]

I think if I had an 060 these days, I'd be in agreement with VladR. I'd not be overclocking. Or if I did, it would be modest. And I certainly wouldn't do it on anything other than the latest revisions that were marketed as embedded but were tolerant of higher clocks.

Although it's not available for all models yet, the PiStorm makes overclocking actual 68K silicon pointless. Keep those old chips serviceable and if you want insane performance, put your trust in emulation based solutions. We aren't talking whole system emulation here, after all, just the CPU.