On Morphos-news.de, there's a link to an article explaining how to
overclock a G4 on the pegasos II

Does someone tryed it succesfully here?

It seems to be very easy to do, but the article is only in german and
I dont understand it; Google translated it for me, but it's very
dangerus to do this overclock without understanding all the article.
Should someone translate it please?

Overclocking is useless on pc, and it's the same
for ppc ... It will just reduce the lifetime of
your processor and perhaps even the board ...

@ Robin: Bla bla
Why not you can buy a G4 Card from Freescale now for 99$

@Robin:

>Overclocking is useless on pc, and it's the same for ppc ...

If it is useless for YOU, then just do not do it!

@ThePlayer

You missed the "1" in front of your 99. ;)

[ Edited by tarbos on 2005/2/13 6:28 ]

Hehe, bbrv start advertising the new cards.
Guess they should be available in at least six months
Getting a faster card is the better choice and it
renders overclocking needless

>Getting a faster card is the better choice and >it renders overclocking needless

Yes, the better choice - and then you can attempt to break 1.8Ghz like those Mac folks do (with 3 years limited warranty).
;)

@ serge

You dont need everything to translate. You need the table and the 2 pictures.

G4 7447 costs $199 from Freescale now! (not only $99).

https://www.freescale.com/webapp/sps/site/prod_summary.jsp?nodeId=018rH3bTdG8653&code=PPCG40004

[ Edited by luky-amiga on 2005/2/13 7:32 ]

Ok, serge it's now time for you to learn german :D

I must also learn english to communicate with you :)

But for example, i had overclocked my G3 600 MHz to 800 MHz, with no problems since 48 hour's, the
feeling is good, the Cooler does his nice Job, and
the Pegasos runs fine and aprox. 25 % faster.

Best wishes

Raoul.

cool Raoul !

It's nice to learne a PEG G3 running at 800 mhz.

How fast is the G4 at 1264 Mhz ?
Does it need a better cooler than the original?
Can you give us a benchmark comparing normal G4 at 1000 and G4 at 1264
please?

Does we need Ram modules at 133 ?

Thank you very much for this informations.

Regards

Serge

I could never overclock my baby..
I would more lie my heart in G5 cards some day.
:D Better then spoiling your CPU.

XzIt oF Apathy 8)

Hallo serge,

for the G4 i couldnt say anything, because i have only the G3, @ http://www.pegasosforum.de/download.php?id=71
you can download my actual benchmark-results with the G3 @ 800 MHz, for memtest, amigod2-68k,
SysSpeed (68k) and monolith ;)


Short explained, i have screwed a 49x49x10mm PIII-ventilator at the standard passiv-cooler, in the next i plan to publish some photo's. But attention this tip is only for the G3 !

The overclocking for G3 and G4 only works with
PegasosII-Boards !

DDR 400 FSB are at the moment the best solution
for the pegII-boards (overclocked or not).

Best whishes

Raoul.

You should be careful with your RAM.

The OpenFirmware boot configures your RAM based on SPD values and good guesses - if you put in a PC3200 DIMM to a Pegasos, and it does not have SPD values for PC2100 operation, it will run at PC3200 latencies (noticably CL3 or CL2.5 instead of possibly CL2, plus lots of other timings you would never read on the label).

The speed penalty for using "Super fast Overclockers RAM" could be as much as 10 to 15% compared to just ordinary PC2100.

The best RAM to get for your Pegasos is the fastest PC2100 RAM you can get. If it says CL2 PC2100, it's good.

Remember; the frontside bus is 133MHz and the RAM is clocked at 133MHz (double pumped). Faster RAM will not clock the bus faster. If you DO overclock your G4 (I do not condone this) then using faster RAM will not change a thing, since the bus speed stays the same.

Neko

[ Edited by Neko on 2005/2/15 21:46 ]

@ Neko

That was an interesting post! I miss official documentation describing things like that (in other areas as well); information and hints of how to get the most out of your peg, including compatibility experiences, etc. That should even be a chapter in the official Pegasos Manual IMHO, as well as "overclocking" (or perhaps rather "how you void your warranty by 'customizing' your CPU clock frequency" ) as well as all kinds of other thinkable HW technical details describing every aspect of the hardware. This could also be interesting to the people buying Pegasos ODW systems from the Freescale site to evaluate G4 CPU's as well; they might want to experiment a little, and try out any and all aspects of the PPC and the Pegasos platform.

The more documentation, the merrier!

Hallo Neko,

that an interesting post :)

My recommend for the DDR 400, is not depend from the overclocking.

we have run benchmarks to test compatible DDR-modules in special for the firmware 1.2 -
these benchmarks have documented that not the CL-Values are important for performance-increases between DDR 333 and DDR 400, only the FSB (in this case 333 MHz or 400 MHz) is important, to became more ramspeed in MOS, under

http://www.pegasosforum.de/viewtopic.php?t=1183&highlight=ddr

could you see some memtest-results with certain DDR-modules, the DDR-types and the matched results are readable also in english :)

we are working just result-oriented :D

Best whishes

Raoul.

@ Raoul

I do not understand German very well (), so I have to ask; why did you get such low numbers in that tests?

Memtest gives me the following results (PC2100 CL2):

Writing 0x00000000... 467 MB/sec.
Verifying 0x00000000... 226 MB/sec.
Writing 0xFFFFFFFF... 467 MB/sec.
Verifying 0xFFFFFFFF... 226 MB/sec.

... while you seem to score only around 99, 160, 99, 160! Is it a G3/G4 thing?

G3 is much slower thats why he has only 99/160 MB/s.




[ Edited by DJBase on 2005/2/16 16:35 ]

Hallo takemehomegrandma,

and thanks to DJBase, he answers your question
in the short and right, i have only a G3 but now @
800 MHz, the speed-increase in the ram is about
10 percent more, than with 600 MHz.

so my new memtest results are:

Allocated memory at 0x274D8808 -> 0x2D3AE07F, 99440760 bytes
Writing 0x00000000... 110 MB/sec.
Verifying 0x00000000... 164 MB/sec.
Writing 0xFFFFFFFF... 110 MB/sec.
Verifying 0xFFFFFFFF... 164 MB/sec.
Memory is ok!

with DDR 333-modules.

Best whishes

Raoul.

Hi guys

I have Samsung PC2700 DDR Ram CL 2.5 : here are my memtest results for conversation sake:

Allocated memory at 0x22CE90C0 -> 0x2B0685FF, 137884992 bytes
Writing 0x00000000... 469 MB/sec.
Verifying 0x00000000... 228 MB/sec.
Writing 0xFFFFFFFF... 470 MB/sec.
Verifying 0xFFFFFFFF... 229 MB/sec.
Memory is ok!


magnetic

I just brought mine up to 1 gig of Ram
I had to upgrade the firmware to 1.2 for it to work.
I was online, dnetc, AmigAim, here and AmIRC when I ran this test. This is a memtest EXTENSIVE

This is a 512M Crucial PC2100 DDR Ram CL 2.5
512M Kingston PC2100 DDR RAM CL 2.5

Allocated memory at 0x22717E90 -> 0x5BA6FD47, 959807160 bytes
Writing 0x00000000... 469 MB/sec.
Verifying 0x00000000... 225 MB/sec.
Writing 0xFFFFFFFF... 469 MB/sec.
Verifying 0xFFFFFFFF... 225 MB/sec.
Writing 0xFFFF0000... 469 MB/sec.
Verifying 0xFFFF0000... 225 MB/sec.
Writing 0x0000FFFF... 468 MB/sec.
Verifying 0x0000FFFF... 224 MB/sec.
Writing 0xFF00FF00... 469 MB/sec.
Verifying 0xFF00FF00... 224 MB/sec.
Writing 0x00FF00FF... 469 MB/sec.
Verifying 0x00FF00FF... 224 MB/sec.
Writing 0xF0F0F0F0... 469 MB/sec.
Verifying 0xF0F0F0F0... 225 MB/sec.
Writing 0x0F0F0F0F... 470 MB/sec.
Verifying 0x0F0F0F0F... 225 MB/sec.
Writing 0x55555555... 469 MB/sec.
Verifying 0x55555555... 225 MB/sec.
Writing 0xAAAAAAAA... 469 MB/sec.
Verifying 0xAAAAAAAA... 224 MB/sec.
Writing 0xAAAA5555... 469 MB/sec.
Verifying 0xAAAA5555... 225 MB/sec.
Writing 0x5555AAAA... 470 MB/sec.
Verifying 0x5555AAAA... 224 MB/sec.
Writing 0xAA55AA55... 469 MB/sec.
Verifying 0xAA55AA55... 225 MB/sec.
Writing 0x55AA55AA... 469 MB/sec.
Verifying 0x55AA55AA... 224 MB/sec.
Writing 0xA5A5A5A5... 470 MB/sec.
Verifying 0xA5A5A5A5... 224 MB/sec.
Writing 0x5A5A5A5A... 469 MB/sec.
Verifying 0x5A5A5A5A... 225 MB/sec.
Memory is ok!


Furvert

Pegasos II 7447 "G4" 1Ghz firmware 1.2
MorphOS 1.4.2
Radeon 9200 128M DDR AGP
Symbios 895 UWSCSI

[ Edited by Furvert on 2005/2/16 23:51 ]

Hi All,

short message from me, my overclocked G3 works always fine, looks very stable :)

Best whishes

Raoul.

Could you guys who have optimized your Peg with best RAM and / or overclocking run AmigaMark and upload your modules ?

So far my humble stock Pegasos 2 has the best AmigaMark results (against several other Pegs and fast Amithlon PCs).

i'd more like to see dual cpu card, than overclocking my peg2... i'm really satisfied with it's speed but i'm interested in the dual cpu operation...

bye, MarK.

Quote:
But how would MOS handle dual-cpus?
Or rather how would the Abox handle it?
I think a 1.8+Ghz 7448 would be easier.

[ Edited by dan on 2005/7/27 12:53 ]

Just for your information, do you know that you take a risk overclocking your CPU ?
IMHO I doubt you will get any warranty if you burn you CPU card.