I have AsRock X99 Extreme3
i7 6850K
128GB RAM ADATA
2xRTX 3090 installed on PCIe Slot 1 and 3
and a Samsung 970 Evo plus
I have a 40 lanes CPU
still, I’m not getting full speed on the nvme, only getting about 400MBps read/write speed
pics URL are below, I haven’t installed any SATA driver either
I’m running Ubuntu 18.04
and using the command rsync to copy-paste files to check the file transfer rate with progress.
Do you have any other PCIe device plug in to the slots? Is the m.2 3.0x4, is the drive full ? Is the drive connect directly to the cpu or through the chipset ?
How do I check whether my nvme is connected directly to the cpu or through the chipset?
Make sure to download and use the Samsung drivers.
I overlooked that and the performance was affected.
Samsung Magician is a nifty tool too.
Have you tried updating the bios? i Have a x99 extreme 4 it wouldnt even detect the nvme drive untill i updated the bios.
Block diagram of ur motherboard
Is that for Linux?
Yes, my bios are latest as per Asrock website which is v3.70
I would have to check the diagram but as far as I remember, the x99 supports 40 PCIe lanes directly to the cpu
The thing I’m not able to understand yet is, having Asrock’s latest bios still showing me Ultra M.2 = Not detected, I have attached a pic for it too
Yes, I have 2xRTX 3090 installed on 2 PCIe 3.0x16 slots
So out of 40 lanes 32 lanes are being occupied by the GPUs, still I have 8 lanes left.
Bump
Helloowwww? 
Anyone here?
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