# Won't boot with 3+ GPUs **URL:** \ **Category:** Mining\ **Created:** [July 14, 2017, 6:50am UTC](https://forum.zcashcommunity.com/t/wont-boot-with-3-gpus/19142 "2017-07-14T06:50:30Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![jDDk](https://avatars.discourse-cdn.com/v4/letter/j/977dab/32.png) [@jDDk](https://forum.zcashcommunity.com/u/jDDk)\ **Post date:** [July 14, 2017, 6:50am UTC](https://forum.zcashcommunity.com/t/wont-boot-with-3-gpus/19142/1 "2017-07-14T06:50:30Z")
I’ve just put together some new hardware, but it just won’t boot with more than 3 GPUs. I’ve tried many different things, with no luck. The system consists of: - ASUS Prime Z270-P - Intel Core i3-7100 Kaby Lake - Crucial Ballistix Sport DDR4 8GB RED - 8x MSI GeForce GTX 1070 Armor OC - 2x 850W EVGA PSUs It’s been running fine with 2 GPUs for two weeks while I waited for risers. And I’m currently mining with two cards off risers with no issues. I can boot with 3 GPUs, but haven’t tried mining, but with 4 GPUs it crashes upon trying to boot windows. I’ve enabled 4G in BIOS as well as set all PCIe to Gen1. I’ve updated to newest firmware and disabled all peripherals I don’t need (audio, SATA ports etc.). I’m running Win10 installed with AHCI and the drive as GPT. I’ve tried removing the graphics driver completely but it still won’t boot with 4 GPUs. What am I missing here? ---
**Author:** ![PrincessLittlePiddle](https://sea2.discourse-cdn.com/zcash/user_avatar/forum.zcashcommunity.com/princesslittlepiddle/32/4891_2.png) [@PrincessLittlePiddle](https://forum.zcashcommunity.com/u/PrincessLittlePiddle)\ **Post date:** [July 14, 2017, 8:26am UTC](https://forum.zcashcommunity.com/t/wont-boot-with-3-gpus/19142/2 "2017-07-14T08:26:57Z")
When you boot to the UEFI, do you still only get 3 GPUs to register or does it only crash when windows begins to load? Have you tried Gen2? Edit: I had a somewhat similar problem when I was setting my first rig up. Unfortunately, the only solution I found was a total reformat and reinstalling everything from scratch. It worked but has bothered me that I never found the cause. Edit 2: Came across this thread that might help out: [Asus prime Z270-p](https://bitcointalk.org/index.php?topic=1917749.0) ---
**Author:** ![Labus](https://avatars.discourse-cdn.com/v4/letter/l/8dc957/32.png) [@Labus](https://forum.zcashcommunity.com/u/Labus)\ **Post date:** [July 14, 2017, 9:26am UTC](https://forum.zcashcommunity.com/t/wont-boot-with-3-gpus/19142/3 "2017-07-14T09:26:36Z")
Try using pci0 - pci4. Asus does not support 5 gpu if im not mistaken. Need some bios tweaking. ---
**Author:** ![jDDk](https://avatars.discourse-cdn.com/v4/letter/j/977dab/32.png) [@jDDk](https://forum.zcashcommunity.com/u/jDDk)\ **Post date:** [July 14, 2017, 9:37am UTC](https://forum.zcashcommunity.com/t/wont-boot-with-3-gpus/19142/4 "2017-07-14T09:37:15Z")
> [@Labus](#): > > Try using pci0 - pci4. Asus does not support 5 gpu if im not mistaken. Need some bios tweaking. Not sure I follow. Can you elaborate a bit? ---
**Author:** ![Labus](https://avatars.discourse-cdn.com/v4/letter/l/8dc957/32.png) [@Labus](https://forum.zcashcommunity.com/u/Labus)\ **Post date:** [July 14, 2017, 10:02am UTC](https://forum.zcashcommunity.com/t/wont-boot-with-3-gpus/19142/5 "2017-07-14T10:02:18Z")
Use the 1st 4 of the pcie slot. Dont use 5th onwards and see if its works. ---
**Author:** ![Labus](https://avatars.discourse-cdn.com/v4/letter/l/8dc957/32.png) [@Labus](https://forum.zcashcommunity.com/u/Labus)\ **Post date:** [July 14, 2017, 10:07am UTC](https://forum.zcashcommunity.com/t/wont-boot-with-3-gpus/19142/6 "2017-07-14T10:07:39Z")
Try check this [[HW: HowTo] - ASUS H270 prime plus 6 gpu mining - IT WORKS! - YouTube](https://www.youtube.com/watch?v=Z1FnEYI25z0) ---
**Author:** ![jDDk](https://avatars.discourse-cdn.com/v4/letter/j/977dab/32.png) [@jDDk](https://forum.zcashcommunity.com/u/jDDk)\ **Post date:** [July 14, 2017, 10:28am UTC](https://forum.zcashcommunity.com/t/wont-boot-with-3-gpus/19142/7 "2017-07-14T10:28:36Z")
> [@Labus](#): > > Try check this [https://www.youtube.com/watch?v=Z1FnEYI25z0](https://www.youtube.com/watch?v=Z1FnEYI25z0) He settings are the same as mine. I’ve tested with four cards in the first four PCIe slots, in the four last ones and a mix. I’ve also tested the four cards on the same PSU as motherboard, on the other and a mix of those two. All same result - crash when booting Windows. I think next logical step would be to reinstall Windows. ---
**Author:** ![CitricAcid](https://avatars.discourse-cdn.com/v4/letter/c/cc9497/32.png) [@CitricAcid](https://forum.zcashcommunity.com/u/CitricAcid)\ **Post date:** [July 14, 2017, 12:47pm UTC](https://forum.zcashcommunity.com/t/wont-boot-with-3-gpus/19142/8 "2017-07-14T12:47:12Z")
@Labus - every board is different, but Asus itself does not overall limit how many GPU’s will run on a board. For example, I have two Asus Z-170 Pro that are currently running seven 1080TI cards each, and as soon as the M.2 ships in, they will be running eight each. @jDDk - Did you turn 4g on in the bio’s? This is usually needed after 3 GPU’s ---
**Author:** ![jDDk](https://avatars.discourse-cdn.com/v4/letter/j/977dab/32.png) [@jDDk](https://forum.zcashcommunity.com/u/jDDk)\ **Post date:** [July 17, 2017, 6:01am UTC](https://forum.zcashcommunity.com/t/wont-boot-with-3-gpus/19142/9 "2017-07-17T06:01:39Z")
> [@CitricAcid](#): > > @jDDk - Did you turn 4g on in the bio’s? This is usually needed after 3 GPU’s Yep, like stated in first post I’ve enabled 4G. I found a different BIOS (not the newest) that now runs six cards. It’s having some trouble accepting the remaining two cards. ---
**Author:** ![Lightn1ng](https://sea2.discourse-cdn.com/zcash/user_avatar/forum.zcashcommunity.com/lightn1ng/32/5640_2.png) [@Lightn1ng](https://forum.zcashcommunity.com/u/Lightn1ng)\ **Post date:** [July 21, 2017, 5:35pm UTC](https://forum.zcashcommunity.com/t/wont-boot-with-3-gpus/19142/10 "2017-07-21T17:35:09Z")
I’d try using Linux - if it is the OS and not the BIOS.