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View Full Version : Phase change or ln2 on mac?



wr0x2
12-28-2004, 09:14 PM
I know that somebody out there *has* to have done this. I refuse to believe that the most xtreme cooling anyone has ever attempted is water. Someone out there has to have tried phase change or ln2 on a mac.

Once I get my direct die setup built, I'll try it out on an old beige g3 I have, but unfortunatly I don't have any recent mac hardware besides a PB g4.

If anyone knows of somebody who has done this, then please post links! I've looked around for awhile and nobody seems to know of anybody doing anything more than water w/ a mac.

enzoR
12-29-2004, 08:23 AM
how are u supposed to OC it?

[XC] moddolicous
12-29-2004, 09:01 AM
its has a resistor on the cpu that controls its speed. Thats a way to get the new G5's up to 3ghz

kryptobs2000
12-29-2004, 01:31 PM
I don't know much about macs, but whats a stock g5? and how do they compare to p4's/athlons?

wr0x2
12-29-2004, 09:18 PM
The g5 is a very, very nice processor, more comparable to an a64 than a p4. Unfortunatly, I've heard next to nothing about people overclocking them. The g4 and g3 processors were VERY easy to overclock, especially the beige /blue and white g3. Their fsb and multi were controlled in a little jumper block that was easy to access. You could change voltage by resistors on the cpu module itself. Mac overclocking isn't really the point of this topic, if you want to know more about mac overclocking then visit www.xlr8yourmac.com The point of this topic was to see if anyone knew about somebody who has done 'xtreme' cooling on a mac.

boshi
12-30-2004, 08:38 PM
my G4 doesnt have jumpers on the CPU, otherwise I would put it under dry ice.

wr0x2
12-31-2004, 06:33 AM
soem of the G4s do not have jumpers, but they do have resistors you can re solder to change the multi/fsb.
g4 volt modding (http://xlr8yourmac.com/G4CARDS/g4_zif_voltage_mod/g4_zif_voltage_mod.html)
G4 speed settings (http://xlr8yourmac.com/G4ZONE/G4_733_overclock/G4_733_overclock.html)
more speed settings (http://xlr8yourmac.com/G4ZONE/sawtooth/Dual_G4_550_mods.html)

hope that helps, I pulled all those links from here (http://xlr8yourmac.com/g4articles.html). The whole xlr8yourmac site is pretty much the authority on mac overclocking, however limited it may be. If you do decide to put your g4 under DI please post about it!

reject
01-01-2005, 09:27 PM
macs suck at 3d right? so you can only do superpi
the G5 is dual 2.5ghz, so you could oc it too dual 3ghz, 6ghz mac would be sweet

[XC] moddolicous
01-02-2005, 03:20 AM
macs suck at 3d right? so you can only do superpi
the G5 is dual 2.5ghz, so you could oc it too dual 3ghz, 6ghz mac would be sweet

I dont think the macs suck at 3d. The new ones come with a 6800, plus I thought they were mostly used for video rendering.

masterofpuppets
01-02-2005, 06:50 AM
Macs aren't used for heavy duty rendering. SGI Servers/Workstation are used for very intensive rendering. I think NASA has like 1000 SGI Origin servers in a cluster for simulations or something.

wr0x2
01-02-2005, 02:30 PM
Back on topic, are you going to put your g4 under DI boshi?

boshi
01-02-2005, 04:47 PM
once I get a cpu with the multis. I checked mine, it doesnt have the row of resistors or the jumpers. :(

wr0x2
01-02-2005, 05:22 PM
Weird, can you post a pic of your cpu module?

wr0x2
01-17-2005, 07:44 PM
*bump*

boshi, what's happening? I don't know about anyone else, but I'm certainly interested about the results of a g4 under DI.

boshi
01-18-2005, 05:29 AM
*bump*

boshi, what's happening? I don't know about anyone else, but I'm certainly interested about the results of a g4 under DI.

I'm about to take finals next week, so I've been quite busy. :D

wr0x2
01-18-2005, 12:58 PM
Yeah, I know the feeling. Keep us updated when you're done though!

enzoR
01-21-2005, 09:50 AM
id like to see some results too.

Wrench
01-21-2005, 09:55 AM
Actually everyone is dumping SGI stuff. Their workstations suck and are very expensive. The current direction for 3d stuff is on the PC using Linux and Windows, although Macs are gaining more popularity here because of OSX.

enzoR
01-21-2005, 09:57 AM
yea OSX is neat!

R.Rabbit
01-21-2005, 08:08 PM
man a thread not flaming macs, this is odd

stealth17
01-21-2005, 10:49 PM
man a thread not flaming macs, this is odd

yeh thats really odd considering they suck (lol)

i say phase-change as a good phase-chang is better than ln2...you cant reuse a board cooled with ln2 usually...

STEvil
01-21-2005, 11:17 PM
You gotta screw up kinda hardcore to not be able to use it after LN2 runs.

The board is more likely to last than the CPU really.

Charles Wirth
01-21-2005, 11:34 PM
I will repost pics of the G5 broken down. It shows the resistor pack jumper for multipler adjustments. Drawback is limited multiples available so that refridgeration is overkill.

I have not seen anything to adjust pll in OSX

enzoR
01-22-2005, 02:55 AM
oh thats too bad.. but what can you expect its a mac :p:

wr0x2
01-22-2005, 08:36 AM
OS based pll adjustment... Hmm, I see a call to the mac development community... lol.

Leave all the Mac flames out of this thread please. I don't want this thread to turn into a flamefest. I just want to see if anyone here is interested in putting a mac under xtreme cooling.

boshi
01-30-2005, 02:22 PM
my G4 is coming along nicely. Expect some results by end of next week.

wr0x2
01-30-2005, 04:36 PM
Awesome man! Can't wait 'til you post those results!

boshi
02-17-2005, 04:43 PM
I would post results this weekend, but blinky has my DI container and wont give it back. He's always stoned, I wont ever trust him with money or hardware again.

LANjack
02-18-2005, 08:23 AM
Err nevermind my question that was here.. I actually READ the thread and got a link to a resource that had my answers.