There is a way to update an old PC with PATA/IDE SSD that have been announced by Transcend.
The PSD320 series is offered in a 2.5-inch form factor with capacities of 32, 64 and 128 GB.
According to the company, the SSDs are designed to replace traditional 2.5-inch HDDs to lower power consumption and increase read-write data performance. The drives are rated at read and write transfer speeds of 104 MB/s and 93 MB/s, respectively. Transcend said that the PSD320 drives support PATA, Ultra DMA modes 0-6, PIO modes 0-4, and multi-word DMA modes 0-2.
There was no information of pricing, but we were told to expect street prices to begin at about $70 for the 32 GB model.