Is there a particular version of the 68030 chip that is better than others for overclocking (e.g. the 68060 has certain masks that are more suitable for overclocking).  I want to upgrade my 40mhz Derringer to at least 50mhz; however, I figured why not try to get a few extra mhz's in the process.  I have searched for old threads as I vaguely remember someone overclocking to 52-56mhz (my memory is a bit hazy about the details).

Also, would 50ns ram make the process of overclocking more stable and/or feasible?  I'd appreciate any help.

.  I have searched for old threads as I vaguely remember someone overclocking to 52-56mhz (my memory is a bit hazy about the details).

Also, would 50ns ram make the process of overclocking more stable and/or feasible?  I'd appreciate any help.

My memories are similar - probably never seen over 56 MHz mentioned.

on the freescale.com website it says that the "The MC68030 provides a code-compatible upgrade path to the MC68020". Does that mean that an 020 board can be upgraded to an 030 one with one of these processors?

No

Code-compatible should be regarded only from instruction point of view, since 030 is optimized version of 020.
Like Piru said, it's not a drop-in upgrade option.
 
I know it's hard, but you have to stay away from Windows-Intel philosophy

Is there a particular version of the 68030 chip that is better than others for overclocking (e.g. the 68060 has certain masks that are more suitable for overclocking).  I want to upgrade my 40mhz Derringer to at least 50mhz; however, I figured why not try to get a few extra mhz's in the process.  I have searched for old threads as I vaguely remember someone overclocking to 52-56mhz (my memory is a bit hazy about the details).

Also, would 50ns ram make the process of overclocking more stable and/or feasible?  I'd appreciate any help.

50ns does help with overclocking but iv found that not all 50ns simms overclocked the same. all will give some inprovment over 60ns how much also depends on the card chipset.

here iv overclocked a Blizzard PPC with 80Mhz bus, but only 1 set of 128 simm modules will allow this kind of speed. my other 50ns simm modules will only allow around 75Mhz bus.

just for the record the Blizzard PPC will go all the way to 83Mhz bus (tops),but at this speed this PCI interface refuse to work,this test was done with AGA ( no SCSI ).


**** ALL MODIFCATION AT YOUR OWN RISK ****

My memories are similar - probably never seen over 56 MHz mentioned.

Let's change those memories then :-)

68030@64Mhz. Behold:


http://www.amiga.org/gallery/index.php?n=3099


http://www.amiga.org/gallery/index.php?n=3100


http://www.amiga.org/gallery/index.php?n=3101

In the AIBB tests the base system is an A3000@25Mhz. It's quite obviously eating dust! :-)

Also Doom (using latest ADoom, clean AOS3.1-40.42, no extras/patches/etc., KS3.0-39.106, no maprom stuff) feels better/smoother/more playable than on an A4000@25Mhz->31Mhz, but haven't really benched it. But on the A1200 rev.1D1 030@64Mhz w/ full SFX+music+MMU+FPS+AGA @ 320x200 NTSC LoRes+HUD showing, FORCEDEMO gave:
Blit wait time: 904us/frame (noMMU=995)
Safe wait time: 441us/frame (noMMU=485)
Chunky2Planar: 16396us/frame (noMMU=16479)

Note if you try to compare: clean OS vs. patched OS, SFX, music, screen size and showing FPS make a substantial difference in performance.


@Miked:

I guess to answer the original question: you can push the 030@40Mhz to 50Mhz with the right crystal, but as others said, the glue logic might not allow (my guess is it will since the CSA Derringer was 50Mhz capable - but on the Mega Midget Racer without RAM board+SRAM you can't go 50Mhz, that I've tried), but if it works, then make sure you add a fan to cool down the whole thing, especially in the cramped A500 case. I personally would put a small heatsink on the CPU/FPU and have a fan blowing sideways so as to cool more than just the CPU/FPU pair, because in the end those you can replace, but the soldered chips...?

Shameless plug: if you need crystal oscillators (or 68030@50Mhz/68882@50Mhz), I've got a number of them here:
http://www.amiga.org/forums/showthread.php?p=387665
http://amibay.com/showthread.php?t=1507