locating fast solid state computers

How is it possible to find the rate of speed on some of these laptops that are for sale. It doesn’t seem like that’s an easy thing to find

Refer this link for some details: https://www.tomshardware.com/reviews/ssd-buying-guide,5602.html

Anything above 256GB capacity SSD is good now a days.

what about when the specs say PCIe?  what is that referring to?

PCIe is an expansion slot for desktop PCs and servers. Some high end SSDs primarily intended for server use fit into a PCIe slot. You might get something of that type to meet your performance requirements, but it will be expensive, and require a desktop PC or server.

Something like this:

https://www.intel.com.au/content/www/au/en/products/memory-storage/solid-state-drives/data-center-ssds/optane-dc-ssd-series/optane-dc-p4800x-series/p4800x-750gb-aic.html

you either need an expensive NVMe drive or review your needs since there might be lots of different ways to achieve the performance you expect through different means including using async writes. a regular SSD with SAS connectivity would also do the trick for small bursts. both of these are likely very expensive on a laptop but i have not checked recently.

@andyalder:
Very informative graph... thanks!
Do you know what the scale is for the X direction?  Are those MB written?

I don't know which review I got it from but these is a similar one at https://www.tomshw.it/hardware/adata-xpg-sx8200-pro-recensione/prestazioni-adata-xpg-sx8200-pro-1tb/ , they do similar on all their SSD reviews. Pertinent thing is sustained Vs burst, See the MLC Samsung 970 PRO giving constant high performance (at $400/TB) Vs cached TLC and QLC drives going dead slow when the cache runs out. We don't really know whether asker needs that constant write performance or just for a few seconds.

Edit: I can't read Italian but X is in seconds.

sequenziali per 15 minuti per misurare sia la dimensione del buffer SLC che le prestazioni dopo che il buffer è stato saturato.

Google translate says :
sequencial for 15 minutes for the SLC buffer dimensions to double the buffer status and buffer status.saturation