@Fernando

Here is a screenshot of my disks setup. Disk 2 (old OS) and Disk 3 (NVMe OS) have a Windows 10 OS on them. It seems only disk 2 have a EFI partition.

Do I have any other options?

@Fernando
Yes, I correctly flashed the BIOS, and Yes, I saw the PATA drive in the device list. And also, when I installed the OS, there was only the NVMe drive plugged in. I followed your guide. But there was that second SATA drive with a previous OS installed...

Here is a picture of the "Boot screen" I see when I start and must select which OS I want to start on.

@Fernando

Is it possible to copy boot partition from previous OS to new NVMe? If necessary, I will reinstall the whole system.

@DonParlor , @Paradox I wonder if you have your NVMe cards in the right PCIe slots, or have adjusted the speed correctly? I have essentially the same setup as both of you, but I'm running the NVMe add-on card in a PCIe 8x slot, and these are the numbers I'm seeing:


In particular, the CrystalDiskMark numbers are significantly higher. The first time I setup my system, I had the card in a slot that was running at 2X and I got numbers along the lines of what DonParlor is seeing. If you can,. try changing the slot, or changing the BIOS settings for the slot the card is in.

Regardless, like you, I'm a happy camper now!

EDIT by Fernando: To save space, I have resized the inserted pictures (can be enlarged by clicking onto them) and re-attached them by using the Forum software.

Hi VegasGuy - please tell me the make and model of your NVMe C: drive we are comparing performance stats on.

Sometimes the performance test results have inexplicable inconsistencies. My Anvil sequential stats are faster than yours, and the random stats mixed. My CrystalDiskMark sequential writes are a lot faster than yours, but most of my random stats are appallingly slower than yours.

I tested the Adata SX8200 Pro in a PCIe v2.0 slot, and Windows boots up in 8 seconds, exactly the same speed as when it is in a PCIe v3.0 slot.
As expected, my CrystalDiskMark sequential stats are halved in the PCIe v2.0 slot, but strangely my random stats are slightly higher than than those in my PCIe v3.0 slot .... go figure !!! :) .... now that is a paradox :)

Click to enlarge comparison:

Hi everybody and special thanks to Fernando for this great tutorial!
I owe a laptop Asus N751JK which has an m.2 PCIe x4 slot, and obviously... No NVMe driver embedded in its bios to boot off from it :-/
So I already spent a bunch of hours trying to boot off my new Samsung Evo 970 Pro NVMe drive, obviously without any success...
Looking around on internet for any solution, I finally found here what could be the ideal solution.
Of course the Clover method could be a decent way to get my drive working but booting off and USB stick or SD card is not a fair solution for a laptop so far, and I don't feel very comfortable with tweaking the EFI boot partitions in order to put it on an internal SATA drive...

So it would be so nice if I could succeed in modding my BIOS following this guide.
But I have to admit that im quite scared about a possible brick off my mobo!
I carefully followed the guide in order to build my modded Bios (I'm pretty sure to have it built the right way ^^) so my question is: Is there a high level of brick risk by flashing the BIOS with the tweaked file?
Fernando said that some laptop bioses could refuse to be flashed with a modded file, may I give it a try to figure it out by myself without a lethal risk for my laptop?

Thanks forward for your valuable advices and sorry for my imperfect English ^^

@VegasGuy55

I have these settings for my PCIe ports. Should I modify it?

From what I can see, it appears that in this screen, the bios is reporting the PCIe slot supports Gen3 and is set to Auto. Having said that, someplace in the UEFI bios there should be a screen where you can change those settings. It's also possible (like my P8Z77-v LE Plus mb) that you have more than one slot, but not all of them are configurable. On my motherboard, I have 3 slots, but only two are configurable as Gen 3 slots. The third slot (black for anyone with the same board) can only be configured to support 2x or 4x speeds. Not sure if that's Gen 1 or Gen 2, but the other slots support 2x,4x,8x and 16x. Remember, if you have more than one card on the PCIe bus, I think they share the bandwidth, so with 2 cards, the most you would see is 8x.

I'd check your manual to see how many slots you have and what they support. then try moving the card around to see if you get different CrystalDisk readings. Not sure if it's correct (or even true) but I heard someplace that you should try to place your PCIe card as close to the processor as possible to maximize performance. Reading that in print makes me think it's probably an old sysadmin's tale, but you never know !

@DonParlor [EDIT] And just like that...I feel like a complete jerk. If you take a close look at the benchmarks I posted, you might pay particular attention to the queue and thread counts. In the Benchmark I posted, they are all set to 8, so the numbers are skewed dramatically. I guess I was tweaking the settings to try and arrive at some "theoretical" max performance. In real world testing my numbers are more like yours and Paradox. My apologies for making this more confusing than it really needs to be. Bottom line: The numbers are whatever you want them to be, but the improvement in performance over traditional hard drives or Sata ssds is real.

@Paradox Pay no attention to my comments (good advice in general). The queue and thread counts on my benchmarks are were skewed to produce the maximum numbers...not at all reflecting real-world performance. In reality, a place I TRY to spend as much time as possible in, we are all getting far better performance from this upgrade and I suspect you are as happy about it as I am.

@Fernando Thanks for your reply :-)
Actually yes I'm aware that the N751 bios currently supports only AHCI, not NVme.

Zitat von Fernando im Beitrag #4134

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@Neutral67fr:... This may indicate, that the M.2 slot doesn't support the NVMe protocol at all.
Note: There are M.2 slots, which are SATA connected and do only support the AHCI protocol...

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