> From: Robyn Lyons <[EMAIL PROTECTED]>
>
> On Thursday, September 26, 2002, at 05:55 AM, Phillip Meza wrote:
>
>
> Thank's Will & Robyn, Sorry, I have an S900, didn't mention
> that...Will the
> "CPU Multiplier" know I get it...As far as my settings.. The 9X 500
> setting
> you referred to a the top of your response...my machine won't boot or
> should
> I say my monitor stays "Black" I backed off and started at 400 (8X)
> which is
> where I succeeded initially and reset to 450 (9X) which is where I'm
> at now
> Seems "stable" ...Cache control settings are at...Processor Speed-450
> - Temp
> (currently)-64C (147F) Backside Cache 150MHz (3:1) Motherboard Cache
> Disabled...Bus Speed 50MHz...Backside Cache Status (ON) Write-Thru Mode
> (Enabled) Speculative Access (OFF) Dynamic Power (ON).
> Why the "Black" screen at some settings? Any thoughts?
>
> The black screen is usually caused by the CPU running too fast so it
> overheats right after startup. At least that is what my conclusion
> is..... All your other settings look fine, although if you are in OSX
> you can turn Speculative Access on and you will probably gain another
> small speed increase. Always keep it off when running 9.x though.
>
>
> Robyn, good point about "Cooling" this chip is running very HOT seems
> to
> me...Know of a particular cooling method for the XLR8 Controller Card?
> Possibly a fan on heat sink?
>
> This is a problem that I am working on right now. I really want my
> chip up around 330Mhz, which it will do, but it overheats. Anyone want
> to throw out some ideas?
>
>
>
> -Robyn
>
> Thank's Phil Meza
>
I agree with Robyn. You are running too hot. While exact figures are
hard to come by. I've seen 65c listed as the top running speed for G3/4
upgrades. So you are right there and that is why you can't run faster
then 450mhz.
As to cooling. The S900/J700 came from the factory with a hard drive
installed vertically with the bottom front of the machine in the S900
and left front in the J700. This is right behind the speaker. There is
a plastic cage on the backside of where the hard drive goes. This is
made to take a fan I believe the size of the case fan. I took the fan
off my old 233mhz 604 cpu(not all sizes of 604's had a fan) and as it
is a size or two smaller mounted it on the outside of the cage using
pipe cleaner wires(they are like fuzzy bread tie wires) There is to the
side of the cage fan a plug right on the motherboard. It takes the
small 3 wire plug like most all PC fans do. You can of course also use
the type that plug into the plugs that fit drives etc. I liked the idea
of using the fan plug that was right there and both plugs are very
common in PC stores. So you can go to most any PC store and find a fan
that will work. I think I paid $7.00 for the last one I bought. You can
of course pay more. I think the better even cheap fans use ball barring
and will say so on the package. Make sure the fan is blowing inwards
and not out. The fan is only a little to the left(J700) or bottom
(S900) of the cpu so will blow in it's direction. The other issue which
I've noticed is...all those SCSI and IDE flat ribbon cables. It is very
easy for them to block the passage of air. So take a look and make sure
there is a way for the air flow to pass by important things like drives
and your cpu to the fan out let. By the way adding even the small fan
that I did lowered my cpu temp 10 degrees on even the hottest day.
I have a PC that I built from spare scrape parts etc. It needed but had
no place for a second fan. I got one of those PCI slot fans for $9.95
and it runs great with that. So if you have an extra PCI slot that
could also be an option. Though in the UMAX machines I'd go with the
second fan in the fan cage.
Robyn, after much testing etc I went with the 350 mhz @ 50mhz bus. I
ran my 300mhz XLR8 carrier card like this until I upgraded once again.
I was able to run my machine as fast as 61mhz bus but the bleeding edge
usually causes problems of some sort.
This is:
1,2,4,6,7,8,9,11,12
hope this is of help Will S
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