Hi ALL!
I've recently bought a pretty nice Peg2 with 768MB ram and Radeon9250...
Was all ok except that OS41 give me G4@866MHz...
Also Ranger tells me 866 and making benchmarks with ragemem I effectively get result similar to G4@800 from A1 and not Peg2@1GHz...any idea what's happen ?
I've tryed also MOS and it says me 1GHz...

REALLY weird...

Any way to set something in the kickstart to correct that?


EDIT TOPIC: see last message on update infos about cpu speed...

Last edited by Tuxedo on 27-Jan-2011 at 12:15 AM.
Last edited by Tuxedo on 17-Jan-2011 at 01:21 PM.
Last edited by Tuxedo on 30-Dec-2010 at 09:04 PM.

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Simone"Tuxedo"Monsignori, Perugia, ITALY.

@Tuxedo

With RageMem, just look at the "MAX MIPS" result.

MAX MIPS equal "real frequency" x 3. So if it's around 3000, your G4 runs 1000 Mhz, if it's around 2600, then it runs 866.

Frequency reported by Exec may be wrong, and RageMem and Ranger use Exec to display frequency.

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double post sorry...

Last edited by Tuxedo on 23-Nov-2010 at 12:09 AM.

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Simone"Tuxedo"Monsignori, Perugia, ITALY.

@Crisot

Here the ragemem restults:

Quote:

RAGEMEM v0.37 - compiled 11/06/2010 CPU: Motorola MPC 7447/7457 Apollo 1.1 @ 866 Mhz Caches Sizes: L1: 32 KB - L2: 512 KB - L3: none Cache Line: 32 CPU MAX MIPS: 2575 L1 READ32: 3275 MB/Sec READ64: 6548 MB/Sec WRITE32: 2806 MB/Sec WRITE64: 2185 MB/Sec L2 READ32: 1373 MB/Sec READ64: 1786 MB/Sec WRITE32: 1240 MB/Sec WRITE64: 1562 MB/Sec RAM READ32: 145 MB/Sec READ64: 145 MB/Sec WRITE32: 189 MB/Sec WRITE64: 424 MB/Sec WRITE: 805 MB/Sec (Tricky) VIDEO BUS READ: 50 MB/Sec WRITE: 219 MB/Sec

not only the mips but also(and up to all) the cache speeds was too similar to an 800MHz cpu than on an 1GHz...

Unfortunately I dont know where to look for check if the cpu jumper was setted correctly for CPU multiplier on a Pegasos2 machine and on manual no explanation about that...

EDIT for moderators seems taht ---> and

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Simone"Tuxedo"Monsignori, Perugia, ITALY.

@Crisot

Quote:

With RageMem, just look at the "MAX MIPS" result. MAX MIPS equal "real frequency" x 3. So if it's around 3000, your G4 runs 1000 Mhz, if it's around 2600, then it runs 866.

Btw, why on new sam with almost 1.2ghz we have:

Quote:

CPU: AMCC PPC460EX 1.2 @ 1166 Mhz Caches Sizes: L1: 32 KB - L2: 256 KB - L3: none CPU : MAX MIPS: 2332

Its looks like real cpu-speed should be 777mgz (but no 1.2ghz)

Last edited by kas1e on 23-Nov-2010 at 08:46 AM.

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@kas1e

Results are good.

PPC460 is only able to dispatch 2 instructions per cycle, while G4 is able to dispatch 3 instructions per cycle.

So a 1166 Mhz PPC460 gives 2333 MIPS, and a 1000 Mhz G4 gives 3000.

Last edited by Crisot on 23-Nov-2010 at 10:30 AM.

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AmigaOne XE --- 7455A@1400 --- Radeon 9000 Pro --- RAM 2GB --- SSD 40GB

@Tuxedo

Just checked my Peg II with ragemem. Results are:-

RAGEMEM v0.37 - compiled 11/06/2010

CPU: Motorola MPC 7447/7457 Apollo 1.1 @ 999 Mhz
Caches Sizes: L1: 32 KB - L2: 512 KB - L3: none
Cache Line: 32

---> CPU L1 L2 RAM VIDEO BUS

Last edited by TrevorDick on 23-Nov-2010 at 10:49 AM.

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CPU frequency has been badly set.

It's a hardware problem, a bad PLL setting on the CPU module. But I don't know where the PLL are on Peg2's modules.

Last edited by Crisot on 23-Nov-2010 at 11:05 AM.

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AmigaOne XE --- 7455A@1400 --- Radeon 9000 Pro --- RAM 2GB --- SSD 40GB

@Tuxedo

on pegasoswiki is an article about overclocking the Pegasos CPU. Although in German, you will find the necessary information about jumper settings at the bottom of the page. (Just in case your Peg really has been underclocked...)

Edit: Looking on the multiplier list, it might be that you have a short circuit on jumper bridge 2. Ususally only bridge 4 is closed, which gives you a multiplier of 7.5 = 1000 mhz.
If additionally bridge 2 is closed, you have a multiplier of 6.5 = 866 mhz.

Last edited by Bladerunner on 23-Nov-2010 at 11:34 AM.

@Bladerunner

ok thank you :)
that evening I wll check the pll settings...
However I can read german... the tiny pic was taken on the cpu card right?

So I 'we to unplug the card to check the settings...any safe way to do that? or maybe similar o plug/unplug PCI/AGP cards?

And...I cant see well... the pll settings was soldered or there was jumpers(seems no jumpers....)...if no jumpers was really hard task...maybe better to go to specialized hw center to eventually solve the problem?... ?

Thnk you!

EDIT: seems also easyly overclocking a bit without problems sincpeg2 users can go stably at 1264...maybe setting to 1131 or 1197 maybe much safer and faster than standard :)

Last edited by Tuxedo on 23-Nov-2010 at 12:34 PM.

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Simone"Tuxedo"Monsignori, Perugia, ITALY.

@Tuxedo

Quote:

sincpeg2 users can go stably at 1264...maybe setting to 1131 or 1197 maybe much safer and faster than standard :)

I wouldn't call max. 25% speed increase (remember that other factors also affect overall speed) "much faster", and especially not "much safer"...

@Jupp3

Since I'm in hurry I probably explained bad...

I mean that probably overclocking not at the maximum was safer...
So a 15% gain was maybe safer than a 25% gain and however faster than standard 1GHz...

Last edited by Tuxedo on 23-Nov-2010 at 01:28 PM.

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Simone"Tuxedo"Monsignori, Perugia, ITALY.

@Tuxedo

Quote:

I mean that probably overclocking not at the maximum was safer... So a 15% gain was maybe safer than a 25% gain and however faster than standard 1GHz...

Just curious, but could you name a few programs / games that are too slow at 1GHz, but fast enough on 15% more?

@Tuxedo

Just to be on the safe side, check to see exactly what processor you have. When I was looking for replacement processors, I found that an 866MHz 7447/7457 exists. I don't know what it would be doing in a Peg2 (maybe a cheap repair?), but it's possible.

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@Jupp3
Quote:

Just curious, but could you name a few programs / games that are too slow at 1GHz, but fast enough on 15% more?

Such reasoning isn't the way. Going from 866 to 1000 is just 15%... going from 1000 to 1150 is just 15%... going from 1150 to 1333 is just 15%... goin from 1333 to 1500 is just 15%... And finally, 1500 is way faster than 866.

In most cases, increasing 15% frequency seems to change nothing. But use it a bit, and then decrease 15% your frequency. You'll really see the difference.

Making a "way too slow" program 15% faster certainly won't make it fast enough, but "more acceptable".

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@Crisot

Quote:

Making a "way too slow" program 15% faster certainly won't make it fast enough, but "more acceptable".

that's exactly the point and can also made a rather slow video in a quite nice video :)

@PhantoInterrogative

how to check exactly what type of cpu?

Last edited by Tuxedo on 23-Nov-2010 at 07:15 PM.

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Simone"Tuxedo"Monsignori, Perugia, ITALY.

@Tuxedo

I don't know if Ranger would tell you the specifics of your CPU or not. The only way I know of checking the specific processor is to remove the heatsink... carefully removing it that is. If your processor is MC7457RX867NC or MC7447RX867NB, then you have the 866MHz version. Otherwise, you merely have a jumper shorting issue as has already been said.

My hope is that your processor is indeed a 1GHz or higher PPC, since the Peg2 came standard with such speeds. I just don't know why anyone would underclock the processor to 866MHz unless they had replaced it at one time, or had inadequate cooling.

Last edited by PhantomInterrogative on 23-Nov-2010 at 07:45 PM.

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I sold my SAM460ex lite... waiting for money to buy a Raspberry Pi... or a Classic A1000 with Buffee... or an A1222... and OS4.3 FE update 11

@Tuxedo

Can you systematically repeat the observation? I.e., if you reboot into MOS, does it always say 1GHz and when you boot into OS4, does it always say 866MHz ?

The only way to be certain is to look at the CPU itself by peeking under the heatsink and noting the model number.

Last edited by Karlos on 23-Nov-2010 at 07:48 PM.

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@Karlos

Yes,
AmigaOS kernel and Ranger says 866

MOS 2.6 1000MHz

EDIT: I wont remove the fan...

Last edited by Tuxedo on 23-Nov-2010 at 07:52 PM.

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Simone"Tuxedo"Monsignori, Perugia, ITALY.

@Tuxedo

did you give a try booting with a linux cd?
i.e. boot with a CRUX PPC 2.6 (32bit) and read /proc/cpuinfo and dmesg.

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