@olegil

Well, I did say I was just thinking about it.

Right now my A1 is stable at 1 GHz with the recent changes of upgrading firmware to the Sii3114-bootable UBoot and moving everything over to a SATA drive on that 3114. It's been up for over 10 days, last I checked (had to reboot it for some reason, not due to stability issues).

If it stays this stable, I'd consider trying some higher multipliers just to see what I can get out of this 933 MHz 7455.

_________________
This posting, in it's entirety, is the opinion and/or statement of the author and does not reflect the views and/or position of this site.

@Crisot

I agree with olegil, that is AWESOME!

Nice that it's as simple as removing a resistor. Though I would rather it was switched. so I would likely remove the resistor (and try to keep it in one piece) then wire up a switch for connecting/disconnecting that resistor to make the adjustments easier.

_________________
This posting, in it's entirety, is the opinion and/or statement of the author and does not reflect the views and/or position of this site.

@Crisot

Do you know if that resistor is a pull-up or pull-down for that pin? Might be simpler to just connect a switch to the right place with the resistor in place depending on the circuit.

_________________
This posting, in it's entirety, is the opinion and/or statement of the author and does not reflect the views and/or position of this site.

Cool! So, to add to my already too long list of things to do, I have a broken a1xe (problem uncertain) and a broken MicroA1 with a cracked cpu die, and almost enough bga tools to work with.

What new g4 chip should I get for the xe? I think I have an exact swap for the g3 module on a mac somewhere, I just need to find them again.

_________________
All glory to the Hypnotoad!

My Freescale MC7457@1267MHZ CPU runns fine with 1533MHZ.

I have set the mulitplicators to:
x11.5 on on on on = 1533MHZ and VCore from 1.34 Volt to 1.39Volt (on off off off).

I forget a Ragmem benchmark, here is it:

RAGEMEM v0.37 - compiled 11/06/2010

CPU: Motorola MPC 7447/7457 Apollo 1.2 @ 1533 Mhz
Caches Sizes: L1: 32 KB - L2: 512 KB - L3: none
Cache Line: 32

CPU
MAX MIPS: 4594

L1
READ32: 5838 MB/Sec
READ64: 11673 MB/Sec
WRITE32: 5003 MB/Sec
WRITE64: 3893 MB/Sec

L2
READ32: 2665 MB/Sec
READ64: 3485 MB/Sec
WRITE32: 2388 MB/Sec
WRITE64: 2937 MB/Sec

RAM
READ32: 230 MB/Sec
READ64: 230 MB/Sec
WRITE32: 289 MB/Sec
WRITE64: 591 MB/Sec
WRITE: 604 MB/Sec (Tricky)

VIDEO BUS
READ: 28 MB/Sec
WRITE: 169 MB/Sec

Last edited by Evillord68 on 08-May-2016 at 10:20 AM.

@Evillord68

Ok, I won't deny that I think it's awesome that you got it working. But in no way will I support the idea of overclocking a G4 that much. I'm advocating replacing the chip with a 1.4 or 1.5 if it needed replacement anyway.

I hope you have enough cooling for that, and a plan for what to do once the chip blows up, as it is bound to do sooner or later

_________________
This weeks pet peeve:
Using "voltage" instead of "potential", which leads to inventing new words like "amperage" instead of "current" (I, measured in A) or possible "charge" (amperehours, Ah or Coulomb, C). Sometimes I don't even know what people mean.

@Evillord68

Impressive!

That empty space on the module, is that L3 cache?

_________________
The Machine: Bride Of The Pin•Bot by Williams Electronics

@Evillord68

Nice that you have got a faster chip As a replacement the 7457 is much more heat tolerant than its predecessor the 7455, I have not dared alter the vcore above 1.3 volts but then I do not need more than a small graphic chip cooler to keep it cooled now. As I read further back the constraints of the rest of the motherboard do not allow for much faster processing anyway, but congrats on the speed increase all the same.

_________________
Swisso Bournemouth A1XEG4 1.3Ghz 7457 CPU

er....CDTV!

Time for an update,

I finally replaced the PSU on my A1, and tried all 3 of the upgraded CPU modules. Unfortunately none of them work. So after several months I am no closer to a G4 upgrade than when I started.

I have a couple of things that may have gone wrong. I do not know 100% if the donor G4s were working, but I was informed they did come from know working Macs.

Also I did have problems with the place that did the CPU swapping over. He stopped communicating for a few months, and only did the work after I threatened to contact paypal about it. So he may have just done a rush job to get it completed.

Not sure where to go from here as the few people that successfully did A1 swaps don't seem to do them anymore.

Oh well. I don't actually use my A1 much anymore and I may now consider selling it if I can't get a cpu upgrade done.