CPU Benchmark

[HammerD]

I wonder if anyone cares.

I do, since I still enjoy using my classic amigas.

[HammerD]

There's nothing wrong with that. What I dislike is breaking perfectly working classic HW by pointless overclocking (or attempts of overclocking). Working classic HW is getting rarer all the time. In my view it should be preserved, rather than trying to pimp it up the maximum until it fries.

If you want the ultimate performance (for instance in 3D), there are way better solutions for that these days (emulation, AROS, or other new amigoid systems).

I'm not really interested personally in 3D, but I did overclock one of my Cyberstorms.  Actually I didn't really overclock it, I just had the CPU replaced with a faster 604e.

I have enough of my own stock of classic hw that I should be ok to tinker with one of it.  If it was my only cyberstorm ppc board then I would have been more cautious.

BTW, I've got my 366MHz cyberstorm ppc to a be relatively stable by hand-picking simms.  I have it fully populated with 128MB ram now.  Your WhichAmiga program identifies the ppc as a 366Mhz 604e.

[HammerD]

very nice depending on what CPU you have in there. what speed is the CPU.

It's an IBM 604e 350MHz, but it's running at 366.  The only problem is the memory sometimes locks up, it's really having a hard time feeding that fast 604e.  I've run sysspeed and measured read speeds of 192MB/sec which is really pushing it.

I've tried many different SIMMS and have some that work ok, but still not 100% all the time.  I think it's very hard to find good quality 60ns 32MB simms for the cyberstorm.   50ns are extremely rare, too.  I've looked.

[HammerD]

i discovered the the same problem two weeks ago @86Mhz bus and i working on the problem. i know what the problem is and it`s going to take some time to fix.

i did not wanted 86Mhz bus but the company that make my oscillators to my spec went in recivership two weeks ago so im stuck with 84Mhz or 86Mhz bus for the PPC,this is why the 68060 has gone up from 75 to 76Mhz now fixed with no data trashing on the CF card.


going back to your problem it may lie in the access time in the memory module but even if you find the correct simm you may still have problems which i have discoverd.

a good starting point is 50ns simms but iv pointed this out before. not all 50ns simms are the same.

the Blizzard card works better with a certain type of simm and the Cyberstorm is most likly to be the same.

there are very poor 50ns simms which shows-up as 47ns. very good 50ns simm show-up as 43ns but *most* simms will show-up as 45ns.

my simms are a little bit faster than 43ns which i will not release any info on untill my project is complete .

I've had a very difficult time finding any 32MB 50ns simms.  I think i have one stick that actually has the chips rated at -5.  Anyway, the PPC bus speed is 66.667 MHz, so it's not really overclocked, but the PPC chip is very fast so it's trying to get at that memory very quickly...and sometimes locks up.  The sticks I have hand-selected now are better than my other "bag of ram" that I have...but I still search for stable and reliable ram.

I have extra cooling on the RAM area and of course on CPU(s).

[HammerD]

i know whats wrong iv already fix such a problem at 75,76 & 83Mhz im now working on fixing my problem at 86Mhz.

you should not have such a problem at a low bus speed,that Cyberstorm should have at lease a 75Mhz bus which make me think something is *not right*.

you have two problems,and a possible third,and before anybody says anything yes i have the answers.

it sounds to me you do have the *correct* ram as the system boots into workbench but whoever changed your CPU has more work to do.

you can not just change the CPU i think everything will work,you have to remember when the CPU is changed to a faster CPU you are going to have solve the other problems.

my Blizzard card is done in such a way i can do pretty much what i want without damaging the card and yes that means all the way to 100Mhz bus.

any modification done on the Blizzard or Cyberstorm cards must be done correctly if not there is a VERY HIGH RISK your card will not last very long before permenent damage is done this is where you must have some knowlege how to repair it.

only cards done by me will have all the know problems fixed and will be stable this is why it says POWER IS NOTHING WITHOUT CONTROL at the bottom of all my posting this is what it means.


**ALL MODIFCATION AT YOUR OWN RISK**

The mod was done by stachu100, who has done several of them.  There are extra things he's done which he talks about here:

http://www.amiga.org/forums/showpost.php?p=556129&postcount=23

He has added 2 extra MOSFET transistors on the bottom of the card.  Not sure about voltage but perhaps he will say

What did you do to make it stable at such high bus speeds?

[HammerD]

you have to ask yourself is it`s a successful modifcation. if the card locks-up, crashes is the card better off with the old processor. im not going comment on what others has done to your card,but i will comment on mine and what will happen in the future.

if and when i do a modifcation on the Cyberstorm which i hope should be early next year,it will work with no lock-ups or crashes and the card does not always need to be overclocked.

do the test in this link below you will need OS4.0 and post result

http://amigaworld.net/modules/newbb/viewtopic.php?topic_id=30817&forum=33

I have OS4.0 installed so I'll have the result by 5:30 pm EST Check back here

I will be interested to know your exact mods.

[HammerD]

@delshay

Ok here is result with Cyberstorm PPC 366MHz, 66.7MHz bus speed, 70ns ram, OS4:

FFTDemo
Speed test for FFT + iFFT: (float)
time needed 8362ms for 413696 samples, => .560922145843505x speed @44100Hz/stereo
Speed test for FFT + iFFT: (integer)
time needed 7154ms for 413696 samples, => .655637502670288x speed @44100Hz/stereo
Speed test for FFT + iFFT: (integer handoptimized 68K ASM)
time needed 3357ms for 413696 samples, => 1.39720904827117x speed @44100Hz/stereo

[HammerD]

those Cyberstorm are destroying the classic PPC time,however my Blizzard card should take back second spot if im able to get the 500Mhz PPC 740 working,i will now be pushing very hard to get this processor working.

as you may of read in the other thread i have a BGA socket on one of my cards so i can change the CPU in under 1 min, exclusive with it`s own heatsink with a choice of alloy or with it`s patent pending heatsink which can run a PPC processor upto 240Mhz fanless.

That would be awesome if you got it working.  Post a photo of your socket mods here!

[HammerD]

Cyberstorm PPC 400MHz, 66.7MHz bus speed, 70ns ram, OS4:

FFTDemo
Speed test for FFT + iFFT: (float)
time needed 7478ms
Speed test for FFT + iFFT: (integer)
time needed 6419ms
Speed test for FFT + iFFT: (integer handoptimized 68K ASM)
time needed 3045ms
 
http://www.youtube.com/watch?v=gxsdHQN6K1Q

Wow very nice! I am jealous now!!!!