@AL1630 I'm not advocating against an SSD; if it works, then it's a great idea and I'm all for it.
But the thing is that it has to work. I have tried two different IDE to SATA adapters (one red StarTech adapter, another green ordinary adapter) with three different drives (one SSD that worked natively in a G5, another SSD that did not work in a G5, and a 2.5" HDD) in my MDD and all of them either couldn't finish installing the OS before quitting out of the installer, boot to the OS before freezing, or froze while using the OS.
I tried this on both Tiger and Leopard, and even got the same behavior using the StarTech adapter paired with the G5-native SSD in an iMac G4 - albeit only when it woke up from sleep.
It should be noted though that both adapters and all SSDs work perfectly fine on a reliable basis with the PCs I've tried them in. So the hardware isn't faulty.
Therefore, I have simply stopped trying to use 2.5" SSDs / adapters with G3 and G4 machines in favor of high-end IDE hard drives, which seem to me to be the easier and safer options at this point. mSATA / M.2 mediums, however, are a different story and have seen continued success with two different adapters paired with two different modules in two different G4 laptops.
So, maybe the solution is to use mSATA / M.2 modules in all G3 and G4 hardware, but just with 3.5" adapters instead of 2.5". Which @victoria99 (or anyone else) could certainly try, but I wouldn't be able to personally vouch for the success rate due to a lack of experience.
@victoria99 I've found another hard drive of a suitable quality. Unfortunately, they seem to be getting sparser by the week:
And here's another GPU:
Please be aware however that if you decide to buy the above GPU, you will need to tape two very small pieces of scotch tape over two specific pins on one side of the connector contacts before installation, otherwise you will not get a picture out of the display upon boot. If you feel that this is a doable task, then by all means go for it. Otherwise ... there are ways to minimize the VRAM consumed by the system so that the existing GPU does not have to be strained to the same extent. Although this is obviously a comparatively un-ideal solution.
But the thing is that it has to work. I have tried two different IDE to SATA adapters (one red StarTech adapter, another green ordinary adapter) with three different drives (one SSD that worked natively in a G5, another SSD that did not work in a G5, and a 2.5" HDD) in my MDD and all of them either couldn't finish installing the OS before quitting out of the installer, boot to the OS before freezing, or froze while using the OS.
I tried this on both Tiger and Leopard, and even got the same behavior using the StarTech adapter paired with the G5-native SSD in an iMac G4 - albeit only when it woke up from sleep.
It should be noted though that both adapters and all SSDs work perfectly fine on a reliable basis with the PCs I've tried them in. So the hardware isn't faulty.
Therefore, I have simply stopped trying to use 2.5" SSDs / adapters with G3 and G4 machines in favor of high-end IDE hard drives, which seem to me to be the easier and safer options at this point. mSATA / M.2 mediums, however, are a different story and have seen continued success with two different adapters paired with two different modules in two different G4 laptops.
So, maybe the solution is to use mSATA / M.2 modules in all G3 and G4 hardware, but just with 3.5" adapters instead of 2.5". Which @victoria99 (or anyone else) could certainly try, but I wouldn't be able to personally vouch for the success rate due to a lack of experience.
@victoria99 I've found another hard drive of a suitable quality. Unfortunately, they seem to be getting sparser by the week:

And here's another GPU:

Apple 603-3254 Nvidia GeForce FX5200 64MB DVI ADP Video Graphics Card Mac G5 | eBay
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Please be aware however that if you decide to buy the above GPU, you will need to tape two very small pieces of scotch tape over two specific pins on one side of the connector contacts before installation, otherwise you will not get a picture out of the display upon boot. If you feel that this is a doable task, then by all means go for it. Otherwise ... there are ways to minimize the VRAM consumed by the system so that the existing GPU does not have to be strained to the same extent. Although this is obviously a comparatively un-ideal solution.