https://forums.softraid.com/softraid-volumes/erratic-raid-0-speeds/ SoftRAID Discussion Board en-US Sat, 25 Apr 2026 17:18:59 +0000 wpForo 60 https://forums.softraid.com/softraid-volumes/erratic-raid-0-speeds/#post-4559 Wed, 29 Apr 2020 18:38:14 +0000 SoftRAID Volumes SoftRAID Support https://forums.softraid.com/softraid-volumes/erratic-raid-0-speeds/#post-4559 https://forums.softraid.com/softraid-volumes/erratic-raid-0-speeds/#post-4556 Wed, 29 Apr 2020 10:46:28 +0000 Go back to Amfeltec. 12GBs is not possible. They may be getting 12-14GB using a PC, but not a Mac pro. The Mac Pro bottlenecks at about 7GB/s I proved this by using 4 Accelsior cards, which "theoretically" could get up to 25GB/s, in a test to try to "peg the meter" and find the mac throughput on the Mac Pro. 7GB/s is the max you can transfer data on the Mac Pro. I have confirmed this with other brands of NVMe cards also. I dug into this and found that no matter what NVME's in any configuration I create I cannot get passed 7000mb/s, as you suggested(I actually have gotten 7500mb/s to be technical). But there is something definitely throttling the bandwidth and I'm pretty disappointed by it. I'd be curious to hear from Apple why that is. Anyhoo, I checked back with Amfeltec and noticed that they used the speed test app called ATTO. As does the tester in that link I posted before. So I went ahead and downloaded ATTO and to my surprise I was getting roughly 10000mb/s with my config. Hmmm, so I tested again with Blackmagic and AJA but was still showing the same bottlenecked speeds. Tested again with ATTO and got 10000mb/s. ATTO tells me what I expected the speeds to be but the others do not. I suspected ATTO was being generous with its test results but I tested another config that I KNOW the max speed and ATTO checked out correctly. So I'm not sure which is telling the truth and which is lying. I spent too much money on this setup to not get my expected speeds. Argggh!]]> SoftRAID Volumes Jesse.Art https://forums.softraid.com/softraid-volumes/erratic-raid-0-speeds/#post-4556 https://forums.softraid.com/softraid-volumes/erratic-raid-0-speeds/#post-4554 Tue, 28 Apr 2020 22:30:01 +0000 Go back to Amfeltec. 12GBs is not possible. They may be getting 12-14GB using a PC, but not a Mac pro. The Mac Pro bottlenecks at about 7GB/s I proved this by using 4 Accelsior cards, which "theoretically" could get up to 25GB/s, in a test to try to "peg the meter" and find the mac throughput on the Mac Pro. 7GB/s is the max you can transfer data on the Mac Pro. I have confirmed this with other brands of NVMe cards also. Can you take a look at here and let me know what you think? It appears in their test results that they can reach 12gb/s using the Samsung 970 Pro blades. https://barefeats.com/mac-pro-2019-flash-raid-boards.html]]> SoftRAID Volumes Jesse.Art https://forums.softraid.com/softraid-volumes/erratic-raid-0-speeds/#post-4554 https://forums.softraid.com/softraid-volumes/erratic-raid-0-speeds/#post-4553 Tue, 28 Apr 2020 22:17:07 +0000 Go back to Amfeltec. 12GBs is not possible. They may be getting 12-14GB using a PC, but not a Mac pro. The Mac Pro bottlenecks at about 7GB/s I proved this by using 4 Accelsior cards, which "theoretically" could get up to 25GB/s, in a test to try to "peg the meter" and find the mac throughput on the Mac Pro. 7GB/s is the max you can transfer data on the Mac Pro. I have confirmed this with other brands of NVMe cards also. Argh! That’s terrible! With the four accelsior cards your total throughput is maxed at 7 gb/s?]]> SoftRAID Volumes Jesse.Art https://forums.softraid.com/softraid-volumes/erratic-raid-0-speeds/#post-4553 https://forums.softraid.com/softraid-volumes/erratic-raid-0-speeds/#post-4548 Tue, 28 Apr 2020 16:41:11 +0000 SoftRAID Volumes SoftRAID Support https://forums.softraid.com/softraid-volumes/erratic-raid-0-speeds/#post-4548 https://forums.softraid.com/softraid-volumes/erratic-raid-0-speeds/#post-866 Tue, 28 Apr 2020 13:11:27 +0000 SoftRAID Volumes Jesse.Art https://forums.softraid.com/softraid-volumes/erratic-raid-0-speeds/#post-866