PowerPC :: Purple Imac G3 Overclock Without Changing Hardware
Oct 21, 2008
i have a purple tray-loading imac g3 and it runs good. but i was looking at the processor speed and it isnt much. i think only 333MHz. is there any way to overclock it without changing hardware, such as a software that will run on 10.2.8? i only want another 50MHz from it or so. it is a powerpc processor, ram modules are directly on the processor, no pins
I scored a G3 400DV from an internet auction site for AU$10. So far I have put 256mb ram, and changed out the HDD (storing the original just in case). I have a fully up-to-date PPC Ubuntu install on it, Firefox 3.6.6 running on an old G3 mac. I want to overclock it as discussed Is it necessary to SOLDER the bridges in, or does graphite pencil do the trick? I'll pick up a B pencil this weekend and when I feel cocky enough I'll de-solder a resistor and test...
My Digital Audio Power Mac G4 is running at 800 MHz with the 1MB L3 cache but I saw on a website that's it's possible to clock it up more. I have a pretty powerful non-OEM cooling fan on the processor heatsink. I have a resistor in the R5 position so it does run at 800 MHz but I want to get it up to 867 and the site shows that it needs the "jumper set" at R5 and R1 so does that mean I can just leave the existing R5 resistor where it is and just melt a little trace of solder over the R1 to connect the two R1 ends together?
Well, using some guides (check bottom of post), I did some experimenting with my old G4 Sawtooth to see how fast I could run its lame 400mhz cpu. Ultimately, my goal was to make Quake 3 playable at a resolution other then 800x600. These tests were all done with PC-133 ram (896MB), running 10.4.11.
Starting specs: 400mhz (4x100mhz) Xbench cpu score: 19.9 1st overclock (with 400mhz cpu): 500mhz (5x100mhz) Xbench cpu score: 29.3 Note: This was incredibly unstable.
In the process of moving to 450mhz on the 400mhz stock cpu, one of the jumper resistor solder pads came off (lame 10 year old glue). So, I went on ebay and got 5 450mhz G4 cpus for 50$ CDN after shipping. One of them came dead, and one failed after the jumper change.
2nd overclock (with 450mhz cpu): 500mhz (5x100mhz) Xbench cpu score: 22.3 Note: This sucked. Now really stable, but I didn't get a performance gain like I got with the 400mhz cpu, and Quake 3 still ran like crap.
So here I decided to do the FSB overclock. Knowing I would end up with 4.5 x 133 which would be too fast, i jumpered a cpu to 3.5 multiplier for a 466 clock. This never booted. I put in a 450mhz chip and...
3rd overclock (with 450mhz cpu): 533mhz (4.5x133mhz) Xbench cpu score: 25.6 Note: That multiply doesn't make sense. It shouldn't be 533. But hey, it worked, stable, and I got a performance gain.
Note: Ok, the clock is still not right. This is the same cpu that did the 5x100 so I know the multiplier is set right. But hey, its doing better in the scores! Conclusion: Success! 533mhz seems to be the top out with the NVRAMRC script in place. But there is a considerable performance gain everywhere (booting, app loading, etc). Most importantly, my Quake 3 now runs very smooth @ 1280x1024 with max graphics settings. I am a very happy camper. I can take pictures of the solder job if anyone requests them. I do recommend this if you have some good technician skills.
Would it be possible to overclock the 5670HD in the 21.5" iMac? I heard somewhere, judging by the device ID, that it is a 5730M card. I have been watching the thread on clocking the 5850M, and seeing the great FPS improvements, so was wondering if it would be in anyway possible to do it to the 5730M. Heres what it says in System Profiler:
ATI Radeon HD 5670: Chipset Model:ATI Radeon HD 5670 Type:GPU Bus:PCIe PCIe Lane Width:x16 VRAM (Total):512 MB Vendor:ATI (0x1002) Device ID:0x68c0 Revision ID:0x0000 ROM Revision:113-B9850H-133 EFI Driver Version:01.00.416
I was looking on GeekBench and noticed there are quite a few quad core iMac that are running faster than the 2.66GHz of the i5 and the 2.8GHz of the i7. I can't make sense if people really are trying to overclock or just somehow are making Geekbench think they have a faster CPU/are editing their scores somehow. How in the world could one overclock the iMac when cooling is a serious concern?
Enjoying the speed of my new iMac i3 but the colors just seem way off compared to my older MBP. Perfect example is going to craigslist where the text is blue on my MBP but on my iMac the text looks purple. What is wrong here and what can I do to correct this?
I've got Power MAC G4 quicksilver 867MHz 1GB RAM and geforce 2MX graphic card... and that's my question.. could I change my card for a geforce 5200FX from a Power MAC G5 without any trouble and modifications?
Yesterday I installed the latest security updates for my ibook via software update. I'm not sure if this is related to my problem, but I thought I might as well mention it. A few hours after installing the updates, I turned on my computer. Everything was running fine, however as I was listening to music and surfing the internet, my screen turned black. I checked the contrast and it was all the way up. The screen then turned completely off. Upon restarting the computer, my screen got to the loading page with the apple icon and the loading circle, and then turned black and flickered every so often with a screen of vertical multi-colored bars.
I held down the power button to turn the screen off, and the flickering increased, before becoming completely covered by the multi-colored bars and then shutting off. This morning I tried again and my computer actually booted up. However, after a few seconds the screen went black, paused for a few seconds, then went completely red, then green, then blue, then three shades of gray, and finally black again. It repeated this cycle twice before the screen turned itself off. Is this a virus, or hardware/software malfunctioning. I've had my ibook for two years.
I have trided to upgrade the hard drive on my G4 15" powerbook. The ribon conector from the drive to the board has come free from the board and I don't know how to refasten it.
I have this weird issue with my PowerBook (2nd last revision) for quite a while; whenever I plug my iPod headphones in I only hear audio on either the left or the right side. When I then go to the audio panel the audio balance is also to the left or the right. When I center it the audio is fine. However, when I plug again the headphones in at a later stage the audio balance is again off to the left or the right.
My friend has forgot her password and cannot login. She is running os 10.4 on iBook G4 800mhz. I told her to insert the original OS CD, restart while holding down the C key and then click on options - change password when it has booted into the original CD. However, it just boots straight to the login screen.
I'm wanting to change my emac (panther) to a tiger operating system. I can purchase a OS X Tiger on ebay. What should I watch out for as I'd like to do a full install?
My logic board is getting ready to crap out for the third time. I hadn't planned on wasting $$ on replacing it, but I have a friend who has an old iBook with a dead screen who told me I could have it. So, my quetion is how hard is it to switch out the logic boards? Has anyone done it? I'd prefer not to pump more money into this thing since it's probably going to die again in 6-9 months.
Also, is there a fan in the 500mHz iBooks? I'm thinking that may be the problem, b/c it's been running incredibly hot lately and have never heard the fan come on.
For those of you who are using 8800 GTS instead of non-apple 8800 GT, you can use NiBiTor to reclock your 8800GTS back to its factory higher clock speed and increase voltage back to factory firmware level without using software/registry overclocking (ie, RivaTuner). This way you dont even have to use RivaTuner (although it is great program if you want to overclock your card beyong factory overclocked speed or reference speed). But most importantly you can change back your card's voltage from 1.1V back to 1.15V.
You need NiBiTor 4.0, 8800GT32.rom (from this forum), and most recent Nvidia beta driver.
1. verify 8800GT32.rom checksum (under Adv. Info tab) before you start. Ignore integrity red warning as that is from different file size due to OSX EFI which you need to boot OSX
2. change Device id from 0602 to Nvidia PCI-E 8800GTS G92 (0600) under main screen
3. under clockrates tab, enable change amount of active performance levels. recycle levels from 0 to 4 to enable "extra" row. Enter your card's true core, shader, and memory speed from factory. Put 0 for all 3D, Thrtl, and 2D. Mine was 678 core, 1728 shader, and 972 memory.
4. Under Tools select voltage table editor, change entry 1 to 1v, entry 2 to 1.05v, entry 3 to 1.1v, and entry 4 to 1.15 v
5. Under Voltage tab, change "extra" under exact mode to 1.15v. VID mode should automatically change
6. Under temperature tab, fanspeed column should now automatically have 100% for extra, 3d, thrtl, and 2D. If not put 100%.
7. open "fanspeedIC" under temperature tab. Fill into match your original 8800GTS firmware setting. Mine was TCirt = 83, min Duty cycle= 37. Rest were same as 8800GT
8. Save. and done. Just dont change Sub Vendor ID, Sub System ID, Board ID. Otherwise your card wont boot under OSX
If you want to overclock higher speed, you should experiment with RivaTuner before overclocking with firmware.
I was just wondering if you can overclock the 8800gt from its stock rating? If you can is there any real benefit? And lastly if you can and there is a benefit how do I go about doing this?
I like the overclock tool from ZDnet but would like a way to make the settings stay after a hard reboot. My system is stable and I do not want to always leave my system on. Anyone figure a way to push these settings once you find a threshold that is stable?
Any ideas ? when i switch my ibook on it says that the date is set to 2001 or earlier and so i need to change the settings. I can't physically access the settings