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Post by viper1024768 on Aug 20, 2010 4:18:36 GMT
Hi All, My first foray into the Mac realm  Just got my hands on a used late 2005 PowerMac G5 (PPC), it comes stock with a 6600LE PCIe 128MB graphics card. Running OSX 10.5.8 Leopard. I have a spare MSI 7900GTX 512MB PCIe graphics card lying around, I am wondering is there a ROM that is written for this card that I can use to flash and use it on my PPC G5? Any help, pointer are greatly appreciated. Cheers |
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Post by aquamac on Aug 20, 2010 19:33:25 GMT
You need to find a 7800 GTX 512 mb to work in a G5. 7900 GTX is not compatible I am afraid.
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Post by viper1024768 on Aug 22, 2010 23:27:16 GMT
Hi
Thanks for the reply. So the 7900GTX are for Hackantosh only right?
thanks again
Cheers
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Post by aquamac on Aug 23, 2010 4:46:52 GMT
Yes, that is correct. PPC cards are far more difficult to get going than Intel as well and need a custom rom. They also need the rom chip cutting off and replacing with a larger one twice the size than a PC one.
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Post by rubberduck13 on Aug 30, 2010 23:34:18 GMT
May i build a 7800gtx rom on my own?! Or do i transform the 7800gtx in to a 4500 quadro actually?
The chip swap is a little fingerplay. First of all i need to repair my "late2005" than i would rather drive
a 7800gtx as a 6600 126mb. How can i build a rom for a 7800gtx? hopefully with best regards
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Post by rubberduck13 on Aug 30, 2010 23:40:31 GMT
Why do i need twice the amount of Rom for a 64K 4500quadro one? I guess there are no 7800GTX
so far!? This left my a little bit confused.
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Post by aquamac on Aug 31, 2010 17:54:58 GMT
The PPC Quadro FX 4500 rom is 128 kb in size as it contains firmware to make a G5 boot - hence why you cannot just stick a PC card in a real mac. Use nvflash to check the rom size as some 7800 GTX are already fitted with a 128 kb chip. PPC roms are completely different to PC cards and Intel mac roms and are a subject on their own.
You cannot rebuild a 7800 GTX rom for a G5. The only chance you have is to rebuild a Quadro FX 4500 rom to work on your G5. This could take some time and is a trial and error job. The place to start is to replace the rom chip for a 128 kb one and then flash blind the Quadro rom in a PC or put it in the second PCIe slot and flash it there taking care not to flash the wrong card. First of all you need to check the size of the rom chip.
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Post by toothpaste on Sept 1, 2010 18:37:25 GMT
The PPC Quadro FX 4500 rom is 128 kb in size... . But PPC Quadro FX 4500 rom is 64 kb in size (http://themacelite.wikidot.com/wikidownloads2) |
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Post by pimpmac on Sept 29, 2011 10:15:28 GMT
You need to find a 7800 GTX 512 mb to work in a G5. 7900 GTX is not compatible I am afraid. would one be able to run multiple of these cards inside the g5 tower? i have one of the last 2 versions made(i always forget which) which i have been rebuilding and i am hoping to utilize all four slots to have 4 graphics cards running for a minimum of 8 monitors for use in the "music industry" for "visuals" and or doing audio visual mix sessions... anyways i've(obviously) been finding it hard to find video cards for it and am thinking my only option is to flash them, anyways what i am wondering and having one helluva hard time figuring out is is this actually feasible and perferably affordable (i'm a musician/artist type with child and limited funds) i've been trying to find graphics cards and ram for this device for months to any information relative to either of those would be GREATLY appreciated! |
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