thanks @hancor , i thought i could directly flash a modified .cap file ready to use inside BIOS
instead we have to work the original .capp inside windows and flash inside os
@mattxx
I wouldn’t flash from windoze…
Flash the .cap file from the BIOS/UEFI via USB stick…then flash the modded file via method already outlined.
Cheers
Can someone upload here ready z87-a nvme supported bios as z87-a.cap? Neither my computer knowledge nor my English is at the level to do what is written here. thank you so much.
asus z87 a ez flash ile verilen rom uzantılı dosya ile nasıl güncelledinben yapamadım. cap uzantılı olmalı diyor. sen de var mı cap uzantılı nvme mod lu z87-a bios u. varsa lutfen upload edebilir misin ben de de aynı ssd var ama kullanamıyoruym. lütfen yardımcı olursan sevinirimm teşekkürler.
@a.yuksel
Merhaba
bende Asus z87a anakartıma m.2 nvme ssd için modlu firmware ı yükleyeceğim. Siz buradaki modlu bios firmware’i nasıl yüklediniz? yardımcı olursanız sevinirim…
I followed the procedure in the 6th post. But the bios crashed. Windows did not open. I removed the bios chip from the motherboard. I completely wiped the bios chip first with the ch341a programmer.
Then I reinstalled the modded firmware.
Result: Successful…
Works for me, samsung 980 pro 256Gigs with a pcie adapter. I had to installed win10 from scratch. Don’t be like me after the bios update, the pc will turn off & on a few times but everything will be fine after that. Check your bios settings after that for a double check. Thank’s !
Delighted to hear your upgraded and updated computer rig is “new and speedier”!
Cheers 
Is anyone else having issues extracting the Z87A bios? I am getting: “The archive is in unknown format or damaged.”
ty!!!
Sorry I have another dumb question. I cannot seem to find any link to afuwinx64, please advise.
2. Usage of an AMI AFUDOS or AFUWIN Tool:
Thank you! I was able to flash my old Z87-a and now I can boot off of an NVMe SSD!! So happy I found this thread. 
Again thanks to the OP and all who helped make this possible!
Hello, I did everything and successfully install the modded bios but I have a problem.
The adapter name is XTVTX NVMe pcie 4 slots(can only add 2 links just google the name) and 2 NVMe
and
The one that has 500G It working as intended, is recognized in the bios, the other one(1T) neither the bios nor the windows can recognize is there another mod to support this kind of NVMe?
The adaptor must have its on Bi-Furcation PCIe lane chipset or a motherboard with it, you should bougth 2 independent adaptors.
Did you read the damm product desciption?
Is even on the images…
Now buy 2 adaptors and one will be used a Boot drive and the other will be present in Windows OS as regular storage drive.
Dont worry your not the first “fool” that wants a Ferrari but has a Seat. Cheers.
EDIT: Keep in mind that, PCIex16_1 and 2 will be split to 3.0x8 if using GPU and PCIe NVMe adaptor, also the 3rd x16 slot will work only @ PCIe2.0 x2
Thanks MeatWar, I will do that.
I appreciate your time.
Are you saying that when I use the adapter my GPU will be less effective?
Common on older chipsets, the pcie lanes will be divided, read your motherboard manual page6… this is the spec design from the Intel Z87 chipset.
If you have a dedicated GPU 3.0x16 on Slot PCIex16_1 and put something else on 2 the lane will be split to 3.0 x8/x8.
So your dedicated GPU will work only @ 3.0x8 instead of the single card 3.0x16, so theoretical…yes there’s a loss of performance but depends of the user scenario.