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Yea that is also what I have read of later, unfortunate as this seller use to be a good source.richx wrote: 24 Jul 2020 17:35
They might have had good 060s (and 030s at one time), but unfortunately received freshly remarked "RC50C"s from them..
The 5 I ordered arrived - all work fine (with MMU) =D It's super hot today here so hard to tell exact temp on each. The first 2 I tested (before the sun came out and started shinning straight onto the CPU... The first two barely went over luke warm after 20 mins of testing (at 50Mhz). The sun then came out and I tested the other 3, again flawless at 50Mhz and MMU working in all. Those last 3 (in direct sunlight) where hot enough that I would ensure they have a heat sink. I think in a spacious case (eg. 2000) they would be fine without.pipper wrote: 23 Jul 2020 17:45 I guess I was lucky with these:
https://www.ebay.com/itm/1PCS-5PCS-MC68 ... 2749.l2649
Have an MMU and work @50Mhz in TF530/536. They all look brand new and carry identical text on them... so they might be rebranded.
I am in no way affiliated with the seller.
Try running this tool on the fast ram: http://aminet.net/util/moni/MemCheck12.lhaGadgetUK164 wrote: 31 Jul 2020 11:30The 5 I ordered arrived - all work fine (with MMU) =D It's super hot today here so hard to tell exact temp on each. The first 2 I tested (before the sun came out and started shinning straight onto the CPU... The first two barely went over luke warm after 20 mins of testing (at 50Mhz). The sun then came out and I tested the other 3, again flawless at 50Mhz and MMU working in all. Those last 3 (in direct sunlight) where hot enough that I would ensure they have a heat sink. I think in a spacious case (eg. 2000) they would be fine without.pipper wrote: 23 Jul 2020 17:45 I guess I was lucky with these:
https://www.ebay.com/itm/1PCS-5PCS-MC68 ... 2749.l2649
Have an MMU and work @50Mhz in TF530/536. They all look brand new and carry identical text on them... so they might be rebranded.
I am in no way affiliated with the seller.
IDE speed increased from ~800KB/s to 2.6MB/s =D
EDIT: Whilst they all work perfectly - they are "fakes" in the sense they have had tops painted and relabelled. All the tops look identical lol - definitely sprayed. I guess they are probably really 25Mhz or something like that. Unless they are 33Mhz and have been painted due to the bad condition of their surfaces originally?
Can I confirm something - where you put "enable cache" - I've types the command "CPU cache" (which shows instruction and data cache enabled) - is that correct?alenppc wrote: 31 Jul 2020 13:23Try running this tool on the fast ram: http://aminet.net/util/moni/MemCheck12.lhaGadgetUK164 wrote: 31 Jul 2020 11:30
The 5 I ordered arrived - all work fine (with MMU) =D It's super hot today here so hard to tell exact temp on each. The first 2 I tested (before the sun came out and started shinning straight onto the CPU... The first two barely went over luke warm after 20 mins of testing (at 50Mhz). The sun then came out and I tested the other 3, again flawless at 50Mhz and MMU working in all. Those last 3 (in direct sunlight) where hot enough that I would ensure they have a heat sink. I think in a spacious case (eg. 2000) they would be fine without.
IDE speed increased from ~800KB/s to 2.6MB/s =D
EDIT: Whilst they all work perfectly - they are "fakes" in the sense they have had tops painted and relabelled. All the tops look identical lol - definitely sprayed. I guess they are probably really 25Mhz or something like that. Unless they are 33Mhz and have been painted due to the bad condition of their surfaces originally?
Basically this tool will test all the fast ram so it will run the CPU at 50 mhz for the entire duration of the memtest. It will inevitably crash on about 85% of RP33s that I have.
This is how I do it:
Boot with no startup sequence, run setpatch, enable cache, run "memcheck FAST". If the test crashes halfway through, I discard that CPU.
Yes, that's correct. For me 99% of 68030RP33s with a 1995 date code fail. 90% of those with a 1993 date code pass. 1996 is a hit and a miss, but probably closer to 50%.GadgetUK164 wrote: 31 Jul 2020 15:04 Can I confirm something - where you put "enable cache" - I've types the command "CPU cache" (which shows instruction and data cache enabled) - is that correct?
I am on the 3rd chip so far and they are all passing fine. The segment test takes ages, but then it flies through the fast RAM test showing all 64MB OK (I've actually ran it twice on each chip back to back). Will let you know when all 5 have been done, but so far 2/5 are fine.
Thanks! All passed! 5/5 - don't take this as any kind of confidence in the quality of the seller, but I lucked out this time around.alenppc wrote: 31 Jul 2020 15:09Yes, that's correct. For me 99% of 68030RP33s with a 1995 date code fail. 90% of those with a 1993 date code pass. 1996 is a hit and a miss, but probably closer to 50%.GadgetUK164 wrote: 31 Jul 2020 15:04 Can I confirm something - where you put "enable cache" - I've types the command "CPU cache" (which shows instruction and data cache enabled) - is that correct?
I am on the 3rd chip so far and they are all passing fine. The segment test takes ages, but then it flies through the fast RAM test showing all 64MB OK (I've actually ran it twice on each chip back to back). Will let you know when all 5 have been done, but so far 2/5 are fine.
Ultimately I stopped buying them because it's a lottery. And I've had batches where about 90% of the CPUs were unusable.