Re: Overclocked MDD
At 20:00 -0800 3/7/12, Wayne Stewart wrote: According to iStat pro I'm running 2 degrees Celsius hotter at idle with both processors running. Using CHUD tools to turn on nap dropps my idle temp about 20 degrees C. At 1.5ghz there wasn't any problems. 1.58 is new to me so I'll be keeping an eye on the temp. If I get worried I'll see about adding an extra fan. One thing I may do anyways is pull the plastic grill off the back of the G4. It covers up a lot of the rear air holes. On Mar 7, 10:38 am, Jesse St.John jesselorenstj...@gmail.com wrote: how are you effectively cooling these as my mdd runs relatively hot already? and i would lke to do this but i am a chicken and i dont want to ruin a good thing. i witnessed online a gentlemen who showed me the resistors on the cpu chip itself to adjust, but decided not to do it until i had one myslef to try out. Something about overclocking and temperature that is a bit difficult to find information on: Faster processors typically use a phase locked loop internally to multiply the applied clock frequency by a small integer - less than 100. I donno about G3 and G4 but anything running over a GHz internal is that way. It's just too hard to deliver a GHz clock to a pin on the circuit board. They also contain internal temperature sensors that can have microcode access that allows for changing the multiplying integer. When the chip gets too hot it can be automatically slowed down without telling you about it. The external clock, the one you're mucking with using changed components need not change at all. When you ask software a question like what is my frequency? you really need to find a standard clock somewhere that can be used for comparison. Options are things like GPS, WWV, a rubidium standard you purchase for more than you paid for the computer. Otherwise the computer will assume the comparison is to be made from what it thinks is its clock frequency. Time of day from the NNTP time transport protocol is not likely to be good enough. -- --A flashlight: is a metal tube used to store dead dry cells. -- -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: Overclocked MDD
I have used those blue ice packs to cool my computers many of times as a temp fix, till you can figure out a better method. I would hang it close to the fan so it blows the cool air in it, I also have used them to sit my Tibook on when the fan went bad till I fixed that too!!! -Original Message- From: Jesse St.John jesselorenstj...@gmail.com Sent: Mar 7, 2012 1:38 PM To: g3-5-list@googlegroups.com Subject: Re: Overclocked MDD how are you effectively cooling these as my mdd runs relatively hot already? and i would lke to do this but i am a chicken and i dont want to ruin a good thing. i witnessed online a gentlemen who showed me the resistors on the cpu chip itself to adjust, but decided not to do it until i had one myslef to try out. On Mar 7, 2012, at 1:30 AM, Kris Tilford wrote: I just realized your MDD is dual-CPU. This will likely require a slightly different patch because the G4 Mini is single CPU. The line in the patch dev PowerPC,G4@0 would likely need an additional CPU which I'd guess would probably be identified as G4@1? I don't know the nuances of Open Firmware, so it's possible the solution for dual CPUs could be as simple as appending G4@1 to the dev PowerPC,G4@0 like this dev PowerPC,G4@0,G4@1? Since I don't know the real answer for dual CPUs I think that the simplest solution would be to enter the entire patch TWICE, once for G4@0 and once for G4@1 in the line dev PowerPC,G4@0. If you want to do this in a single operation without an intermediate reboot, you could enter up to step #5 nvstoreReturn for G4@0 and then repeat from step #1 again for G4@1 and only after the 2nd step #5 proceed to #6 #7 which tell the Mac to use these alternate stored versions and reboot. It's possible you may need to read up on Open Firmware commands for this dual CPU patch to work correctly, but it should be possible. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list Scars only tell us where we have been, they do not have to dictate where we are going... “Choose love and peace above all other options. Commit to the goal of unconditional love and compassion for all life, in all its expressions, and surrender all judgment to God. --- Dr. David R. Hawkins -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: Overclocked MDD
how are you effectively cooling these as my mdd runs relatively hot already? and i would lke to do this but i am a chicken and i dont want to ruin a good thing. i witnessed online a gentlemen who showed me the resistors on the cpu chip itself to adjust, but decided not to do it until i had one myslef to try out. On Mar 7, 2012, at 1:30 AM, Kris Tilford wrote: I just realized your MDD is dual-CPU. This will likely require a slightly different patch because the G4 Mini is single CPU. The line in the patch dev PowerPC,G4@0 would likely need an additional CPU which I'd guess would probably be identified as G4@1? I don't know the nuances of Open Firmware, so it's possible the solution for dual CPUs could be as simple as appending G4@1 to the dev PowerPC,G4@0 like this dev PowerPC,G4@0,G4@1? Since I don't know the real answer for dual CPUs I think that the simplest solution would be to enter the entire patch TWICE, once for G4@0 and once for G4@1 in the line dev PowerPC,G4@0. If you want to do this in a single operation without an intermediate reboot, you could enter up to step #5 nvstoreReturn for G4@0 and then repeat from step #1 again for G4@1 and only after the 2nd step #5 proceed to #6 #7 which tell the Mac to use these alternate stored versions and reboot. It's possible you may need to read up on Open Firmware commands for this dual CPU patch to work correctly, but it should be possible. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: Overclocked MDD
I tried the first one without luck but I was a bit tired and may have made an error. I'll try again in a day or two when Im more rested Wayne On Mar 6, 11:30 pm, Kris Tilford ktilfo...@cox.net wrote: I just realized your MDD is dual-CPU. This will likely require a slightly different patch because the G4 Mini is single CPU. The line in the patch dev PowerPC,G4@0 would likely need an additional CPU which I'd guess would probably be identified as G4@1? I don't know the nuances of Open Firmware, so it's possible the solution for dual CPUs could be as simple as appending G4@1 to the dev PowerPC,G4@0 like this dev PowerPC,G4@0,G4@1? Since I don't know the real answer for dual CPUs I think that the simplest solution would be to enter the entire patch TWICE, once for G4@0 and once for G4@1 in the line dev PowerPC,G4@0. If you want to do this in a single operation without an intermediate reboot, you could enter up to step #5 nvstoreReturn for G4@0 and then repeat from step #1 again for G4@1 and only after the 2nd step #5 proceed to #6 #7 which tell the Mac to use these alternate stored versions and reboot. It's possible you may need to read up on Open Firmware commands for this dual CPU patch to work correctly, but it should be possible. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: Overclocked MDD
According to iStat pro I'm running 2 degrees Celsius hotter at idle with both processors running. Using CHUD tools to turn on nap dropps my idle temp about 20 degrees C. At 1.5ghz there wasn't any problems. 1.58 is new to me so I'll be keeping an eye on the temp. If I get worried I'll see about adding an extra fan. One thing I may do anyways is pull the plastic grill off the back of the G4. It covers up a lot of the rear air holes. On Mar 7, 10:38 am, Jesse St.John jesselorenstj...@gmail.com wrote: how are you effectively cooling these as my mdd runs relatively hot already? and i would lke to do this but i am a chicken and i dont want to ruin a good thing. i witnessed online a gentlemen who showed me the resistors on the cpu chip itself to adjust, but decided not to do it until i had one myslef to try out. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Overclocked MDD
I've been trying to do something with a MDD that was a little beyond it so I overclocked a 1.42 to 1.5ghz. That wasn't quite enough so I tried for 1.58ghz. System Profiler is saying 1.5ghz. Xbench tests seems to be showing the correct amount of speedup though it's also saying I have 1.5ghz processors. I'm wondering if I might have had one bad resistor and am running one processor at 1.58 and one at 1.5ghz. I guess the reason I'm wondering is that years ago I tried OCing for the first time with a dual 867 and only did one set of resistors. It felt faster but I had each processor running at a different speed and System Profiler was still saying 867. When I did the second set it read the faster speed. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: Overclocked MDD
On Mar 6, 2012, at 11:01 PM, Wayne Stewart wrote: I've been trying to do something with a MDD that was a little beyond it so I overclocked a 1.42 to 1.5ghz. That wasn't quite enough so I tried for 1.58ghz. System Profiler is saying 1.5ghz. Xbench tests seems to be showing the correct amount of speedup though it's also saying I have 1.5ghz processors. I'm wondering if I might have had one bad resistor and am running one processor at 1.58 and one at 1.5ghz. I guess the reason I'm wondering is that years ago I tried OCing for the first time with a dual 867 and only did one set of resistors. It felt faster but I had each processor running at a different speed and System Profiler was still saying 867. When I did the second set it read the faster speed. I overclocked my 1.42GHz Mini to 1.58GHz. The problem with System Profiler About This Mac is that they don't actually measure the CPU speed. The firmware has values built-in, and it's a simple look-up process of stored possible values. The problem with 1.58GHz is that Apple never made any Mac with 1.58GHz CPU speed, so that value isn't stored in the look-up table. On the Mini, instead of reading 1.5GHz, which is a possible value, for some reason it would say 750MHz. The solution was to patch the firmware using a one-time mod by booting into Open Firmware and patching the values in the look-up table so that 1.58GHz now corresponds to whatever CPU/Bus parameter is being measured. This patch won't persist thru a PRAM zap or NVRAM reset, and if your PRAM battery dies you'd need to do the patch again. Here's the patch I used for my G4 Mini. It may or may not work for your MDD? There's no danger AFAIK, if you need to get back to the OEM firmware just zap the PRAM or reset the NVRAM and all is back to normal. This should also fix the L2 cache size if it's reported incorrectly: These are the values for 1.58GHz overclock: 1.58 GHz PowerPC G4 5e2ce2fd = 157997 = clock frequency 5e1da0c0 = 157900 = rounded-clock-frequency 5e178682 = 1578600066 = recalced-clock-frequency Here's the instructions on how to persist the 1.58GHz into the system so that About This Mac works properly: 1. Reboot the computer holding down Cmd-Opt-O-F to enter the Open Firmware command line. 2. Type nvedit and press Return 3. Enter the following script exactly, pressing Return at the end of each line. dev / 9eb18ef encode-int clock-frequency property dev /cpus dev PowerPC,G4@0 5e2ce2fd encode-int clock-frequency property 9eb18ef encode-int bus-frequency property 5e1da0c0 encode-int rounded-clock-frequency property 5e178682 encode-int recalced-clock-frequency property 27ac63b encode-int timebase-frequency property dev l2-cache 5e2ce2fd encode-int clock-frequency property dev / 4. Press Ctrl-C to exit the editor. 5. Type nvstore and press Return 6. Type setenv use-nvramrc? true and then press Return 7. Type reset-all and press Return If you use these instructions please report back the results so we'll know whether or not they work on the MDD also. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: Overclocked MDD
I just realized your MDD is dual-CPU. This will likely require a slightly different patch because the G4 Mini is single CPU. The line in the patch dev PowerPC,G4@0 would likely need an additional CPU which I'd guess would probably be identified as G4@1? I don't know the nuances of Open Firmware, so it's possible the solution for dual CPUs could be as simple as appending G4@1 to the dev PowerPC,G4@0 like this dev PowerPC,G4@0,G4@1? Since I don't know the real answer for dual CPUs I think that the simplest solution would be to enter the entire patch TWICE, once for G4@0 and once for G4@1 in the line dev PowerPC,G4@0. If you want to do this in a single operation without an intermediate reboot, you could enter up to step #5 nvstoreReturn for G4@0 and then repeat from step #1 again for G4@1 and only after the 2nd step #5 proceed to #6 #7 which tell the Mac to use these alternate stored versions and reboot. It's possible you may need to read up on Open Firmware commands for this dual CPU patch to work correctly, but it should be possible. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
