L2 slow write speeds

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0ldman
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L2 slow write speeds

Post by 0ldman »

I've got a Ryzen 3700x, 32GB of DDR4 3200, 12GB L1, Samsung PM961 256GB NVME caching various drives.

My write speed on the NVME drive is only ~30MB/s, rarely even as high as 50MB/s, when fetching data for the cache drive.

I thought maybe it was an issue with TRIM so I removed it as the L2, formatted the drive, set it as a data drive, tested it and got ~1GB/s write speeds. I set it up as L2 again and I'm only getting ~30MB/s write speeds filling the cache. It takes nearly 6 times as long to cache Cyberpunk as it does to load it from the hard drive in the first place. Once it's loaded to L2 it's fast, of course.

Why does it take so long to fill L2 and what can I do to improve this?

Edit: finally, literally just now after a couple of weeks of fiddling with this, it writes @ 300MB/s. No idea what's going on here.
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Re: L2 slow write speeds

Post by Support »

By default, PrimoCache populates data into L2 when your system is idle. So if your system keeps busy, the speed of L2 population will be slow. You may tune the speed and set the value to "Fastest" or "Instant" in the L2 Advanced Settings - Gather Interval.
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