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[MacTron]

I have in my hand a G4 single 1.33 Ghz 2Mb of L3 from a Xserve.

Click Image to Enlarge...


I'm going to try overclock it at 1.5 Ghz and test if the 2Mb of L3 caché can improve NI DFD (Direct From Disk) in Kompakt as I suspect.

Let's see how

[MacTron]

I'm going to try overclock it at 1.5 Ghz.

The overclock was successful. Let's see how it goes in the next few day... and if we try to go further (1.58 Ghz or 1.66 Ghz)



I've also taken a few pictures of the overclock process in case of some one is interested...
BTW, may be this is the FIRST report of a [email protected] single overclocked

and test if the 2Mb of L3 caché can improve NI DFD (Direct From Disk) in Kompakt as I suspect.

No improvement at all

[supernova777]

cool.. this is hardware modification?  u are brave 

[MacTron]

cool.. this is hardware modification?

Yes.

  u are brave 

Thank You. But I've done this several times, just being careful and double check everything.
BTW, Some explanation  pictures I have done:

[MacTron]

NOTE: All MDD Single CPU (1.0 Ghz and 1.25) have 1MB of L3, but all xServe G4 Single CPU (1.0 Ghz and 1.33) have 2MB of L3.
The overclock settings are identical to the Single 1.25 CPU module.

So we are exploring an unique and uncommon setup: a Single CPU module with 2MB of L3 Cache in to a MDD.

[MacTron]

Voltage rise from 1.55v to 1.70v, and 1.66 Ghz achieved at first try.



But crash under heavy load.
At 25 degree Celsius in the room and the MDD with standard cooling...
We still have a few thing to test before defeat...

[supernova777]

its probably crashing because of the l3 cache cant support 275mhz
anyway to lock the cache at the old speed (250mhz)?

[MacTron]

its probably crashing because of the l3 cache cant support 275mhz

Good point, but The L3 Is rated to 300 Mhz according to Samsung specs sheet.

Now I'm doing a few test with an improved cooling and it is going a bit better...

[MacTron]

Now I'm doing a few test with an improved cooling and it is going a bit better...

MacBench 3.0 passed, It is promising...

[Knezzen]

Im REALLY interested in this since Pro Tools only supports one CPU. Would be great to have one of these in my MDD

[supernova777]

does MARL accept Credit card ? 

[MacTron]

Im REALLY interested in this since Pro Tools only supports one CPU. Would be great to have one of these in my MDD

I have overclocked 6 MDD CPU modules. Some of them several times to try different speed and voltage settings. One of them only reached 1.42 Ghz. The other modules achieved 1.5 Ghz at stok voltage and with satandar cooling.
The 1.25 single CPU usually run great at 1.5 Ghz, this is my recomended overclock for everyone. The 1.33 module (and the 1.42) seems to achieve this -even easily- and may be it can go further, but this is an experimental territory by now because:

For the 1.66 speed a huge case modification may be needed, like this:

http://macos9lives.com/smforum/index.php?topic=927.msg3271#msg3271

For the 1.58 Ghz speed, with the big fan over the aluminium heat sink and a grid of holes where the ATA 100 Hard Disk is placed, may be enough -I think-

That's will be my next try...

[IIO]

if the single processor card from an xserve fits into an MDD, the question if the dual processor cards would, too, is raised.

i also wonder if there are possible problems about bootin MacOS9 and PRAM.

a dual 1.33 with 2 mb cache per processor would be our new all-apple-no-risk tower system.

[MacTron]

if the single processor card from an xserve fits into an MDD, the question if the dual processor cards would, too, is raised.

There is no problem at all.

The module is virtually identical to the dual 1.42. Just change the G4 chip legend, from RX1333PF to RX1428PF, furthermore there was a rumor at its time that Motorola was labeling the speed of his G4 CPU's "according to demand"... who knows...

http://www.ebay.com/itm/NEW-Apple-PowerMac-G4-Xserve-1-33-GHz-Dual-CPU-661-2834-820-1470-A-/350733177070

i also wonder if there are possible problems about bootin MacOS9 and PRAM.

No problem. PRAM nothig has to do with this AFAIK. And the OpenFirmware accept *any* CPU module with a 7455 despite his speed, L3 cahe, etc...

No problem. All MDD and XServe G4 (slot load) CPU modules are interchangeable. Even those from FW800. It only have to be in consideration some CPU modules from /to 133 Mhz bus MDD's...

a dual 1.33 with 2 mb cache per processor would be our new all-apple-no-risk tower system.

It is better the dual 1.42...
But if you plan to overclock it, probably you get the same result from both, so is better to choose the 1.33 module because is cheaper.

[IIO]

oh lol, for a moment i forgot about the dual 1.4 ... i thought 1.25 is the current top ... so nevermind!

though a direct comparison between the 1.4 dp and the 1.33 dp with more cache would be interesting.

(of course using a dual 1.4 for OS9 includes dealing with the HD driver problem)

[IIO]

hm, the smallest dual @166 was the QS 2001 dual 800. that one could get quite some benefit from a dual 1.33 processor.

[MacTron]

though a direct comparison between the 1.4 dp and the 1.33 dp with more cache would be interesting.

Both have the same amount of L1, L2 and L3 caché.
BTW: 2 Mb of L3 cache per CPU.
So, only a little CPU speed difference.

(of course using a dual 1.4 for OS9 includes dealing with the HD driver problem)

To what HD driver problem are you referring to?

hm, the smallest dual @166 was the QS 2001 dual 800. that one could get quite some benefit from a dual 1.33 processor.

No QS had ever a 166 system bus. The smallest Powermac with a system bus @166 was the MDD 1.0 DP

[supernova777]

IIO we are glad that u are here at this site but i would appreciate it if u could review + speak more carefully the statements u make..
we are here to provide accurate information..
and thinking carefully before we speak to ensure correctness
we dont need people blabbing carelessly facts that are incorrect
please take your time before u post
and post with more care

[DieHard]

NI DFD (Direct From Disk) in Kompakt

Hey Mactron.. 2 quick notes

1)

DFD settings for KONTAKT/KOMPAKT:
If DFD does not work smoothly on your system and you have more than 1 GB of RAM installed we suggest the following: In the DFD options, change to expert settings. Set BOTH buffers to 600 and the maximum voices to between 90 and 128.
Due to the fact that every computer has its individual configuration (amount of RAM, built in hard disk cache, drivers...) we recommend to experiment with the expert settings a little bit to find out individually which setting works best for your respective system. On systems with lower RAM you can try to reduce the amount of maximum voices.

Found that, but never needed to try it… just in case you did not have that info (but you probably already do)

2) When I moved all your Kompakt stuff to my Mac OS Volume (1st Volume of my OWC SSD) DFD worked without a hitch/hickup even for large sample libraries… so I am concluding that the faster the media of where the samples are stored is a more crucial factor over the CPU Cache. Halion does seem to buffer samples better than Version 1.x of Kompakt, but both Halion and Kompakt really shine when their libraries go SSD.
I can test a specific multi if you wish...

[IIO]

BTW: 2 Mb of L3 cache per CPU.

ah, seei have no idea about MDDs, i dont use them. but didnt you state above that the processor from the xserve would be on top because it has more?

To what HD driver problem are you referring to?

that it doesnt support OS9 by default. might be something which can keep people away from using such a configuration. you know how hard it is to unattach a IDE disk´s power cable!