I've been looking for a SATA3 or USB3-like ramdisk for quite a while too, and see none..
I did noticed the Acard and the 4GB PCI...The Acard seems OK but very unfortunately too big and the throughput is capped by the SATA 1(and a later model SATA2)..
As mentioned by
jgspeer above, desktops are lucky, if 64GB doesn't fit, you can get a Xeon platform pretty cheaply at these day which support 96+ GB of memory, that truly beats anything for a home-use personal computer.
In the case of utilizing internal Ram as a ramdisk, I personally recommend "Primo Ramdisk," it support the features mentioned in the post above, such as save to HDD at shutdown, auto-save periodically; auto-load at start-up, delay auto-load at start-up(which means only start to load when file requested, so save ram). Moreover, Dynamic Memory Management, which means the physical memory is occupied only when data actually loaded(while most of the ramdisk software just occupy the full size at start up).
For laptop, unfortunately, 32GB max, even for those equipped with a Xeon processor(like some Clevo based laptop).....At this point, a 2.5" or 3.5" hard drive sized ramdisk would be still fantastic for some heavy work(and with consideration of maintaining the SSD).. Though, again, the Acard, the only option, is capped at SATA 2...not to mention the 5.25", but 300+ dollars is just...Awwwwwwwwwww... I'd get one or two if they priced it less than $100. I mean, really, if someone is willing to spend a thousand bucks to two of these Acard for a desktop, then why not just go for a Xeon platform??? I wonder.
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