Very peculiar GPU problem

[SonicSoundVW]

Hello all!

First time poster and builder.

Hardware:
4 x Gigabyte GeForce GTX 1070 WINDFORCE OC 8G REV2.0 Graphic Cards (GV-N1070WF2OC-8GD REV2.0)
1 X Crucial 4GB Single DDR4 2133 MT/s (PC4-17000) SR x8 Unbuffered DIMM 288-Pin Memory - CT4G4DFS8213
1 x EVGA SuperNOVA 750 G2, 80+ GOLD 750W, Fully Modular,
1 x ASUS PRIME Z270-P LGA1151 DDR4 HDMI DVI M.2 USB 3.0 Z270 ATX Motherboard PRIME Z270-P
1 x Intel CPU BX80662G3900 Celeron G3900 2.80Ghz 2M LGA1151 2C/2T Skylake
1 x DREVO X1 Pro 64GB SSD Internal Solid State Drive 2.5-Inch SATA3 MLC High Performance
6 x MintCell 6-Pack PCIe 4-Pin MOLEX PCI-E 16x to 1x Powered Riser Adapter Card w/ 60cm USB 3.0 Extension Cable & MOLEX to SATA Power Cable - GPU Riser Adapter Ethereum Mining ETH + 2 MintCell Cable Ties

If this is posted in the wrong place please move it or let me know :-)

I will try to summarize my journey thus far.

Two cards, worked great!

when I received the 3rd card I installed it. It showed error code 43. moved PCI slots, double checked BIOS, reinstalled NVIDIA drivers (latest) twice, reinstalled windows. swapped risers including swapping motherboard side and GPU side along with swapping USB cables and power adaptors and power configuration in regards to how many cards were on one sata leg. All cards work individually and  two will work together, but not 3. I finally resolved the problem by plugging one of the graphics cards directly into the motherboard. worked perfect for 24 hours.

Next card came in. I moved the graphics card I put on the motherboard back on a riser and plugged in the 4th one. Now 3 of the cards are working and one is not with the one not working showing in device manager as error code 43.

after the last windows install before NVIDIA drivers I installed them one by one after each reboot and they all showed with the default Microsoft video drivers.

after all of them were showing I downloaded and used NVIDIA driver 378.92 and still one shows as error code 43.

I move the ricer card to a different PCIE port on the motherboard and it says, no drivers are installed for this device but it won't let me install them. then 5 mins later it goes back to code 43.

I went to boot into safe mode and it restarted and the screen went black after reboot... now idk what to do and im at my wits end.

anybody have any comments questions concerns or solutions to guide me to a solution?

[wacko]

Z270 boards usually require some tuning in BIOS for multiple GPUs to work. I've got a couple of these boards (prime z270-p), off the top my of head you need to set pci-e speed to gen 2 (at least 3 different settings in the BIOS require all selecting gen. 2) and enable "above 4g decoding". I run 8 GPUs per rig on these boards, and for that you need to adjust more settings (switch m2 ports to pci-e mode, disable sata etc), but for only 4 cards you probably don't need that. Oh, and as always, disable all the controllers you don't use: sound, serial etc.

[leonix007]

Hello all!

First time poster and builder.

Hardware:
4 x Gigabyte GeForce GTX 1070 WINDFORCE OC 8G REV2.0 Graphic Cards (GV-N1070WF2OC-8GD REV2.0)
1 X Crucial 4GB Single DDR4 2133 MT/s (PC4-17000) SR x8 Unbuffered DIMM 288-Pin Memory - CT4G4DFS8213
1 x EVGA SuperNOVA 750 G2, 80+ GOLD 750W, Fully Modular,
1 x ASUS PRIME Z270-P LGA1151 DDR4 HDMI DVI M.2 USB 3.0 Z270 ATX Motherboard PRIME Z270-P
1 x Intel CPU BX80662G3900 Celeron G3900 2.80Ghz 2M LGA1151 2C/2T Skylake
1 x DREVO X1 Pro 64GB SSD Internal Solid State Drive 2.5-Inch SATA3 MLC High Performance
6 x MintCell 6-Pack PCIe 4-Pin MOLEX PCI-E 16x to 1x Powered Riser Adapter Card w/ 60cm USB 3.0 Extension Cable & MOLEX to SATA Power Cable - GPU Riser Adapter Ethereum Mining ETH + 2 MintCell Cable Ties

If this is posted in the wrong place please move it or let me know :-)

I will try to summarize my journey thus far.

Two cards, worked great!

when I received the 3rd card I installed it. It showed error code 43. moved PCI slots, double checked BIOS, reinstalled NVIDIA drivers (latest) twice, reinstalled windows. swapped risers including swapping motherboard side and GPU side along with swapping USB cables and power adaptors and power configuration in regards to how many cards were on one sata leg. All cards work individually and  two will work together, but not 3. I finally resolved the problem by plugging one of the graphics cards directly into the motherboard. worked perfect for 24 hours.

Next card came in. I moved the graphics card I put on the motherboard back on a riser and plugged in the 4th one. Now 3 of the cards are working and one is not with the one not working showing in device manager as error code 43.

after the last windows install before NVIDIA drivers I installed them one by one after each reboot and they all showed with the default Microsoft video drivers.

after all of them were showing I downloaded and used NVIDIA driver 378.92 and still one shows as error code 43.

I move the ricer card to a different PCIE port on the motherboard and it says, no drivers are installed for this device but it won't let me install them. then 5 mins later it goes back to code 43.

I went to boot into safe mode and it restarted and the screen went black after reboot... now idk what to do and im at my wits end.

anybody have any comments questions concerns or solutions to guide me to a solution?

Try to check your motherboard BIOS settings, ensure 4G enabled, and try setting PEG and PCI Gen to Gen 1

https://bitcointalk.org/index.php?topic=1917749.0

[SonicSoundVW]

Z270 boards usually require some tuning in BIOS for multiple GPUs to work. I've got a couple of these boards (prime z270-p), off the top my of head you need to set pci-e speed to gen 2 (at least 3 different settings in the BIOS require all selecting gen. 2) and enable "above 4g decoding". I run 8 GPUs per rig on these boards, and for that you need to adjust more settings (switch m2 ports to pci-e mode, disable sata etc), but for only 4 cards you probably don't need that. Oh, and as always, disable all the controllers you don't use: sound, serial etc.

If I can get windows back ill try GEN 2 and see what happens. I plan on 8 in the future. Im glad I didn't get the wrong board. :-)

having troubles getting it to boot from the thumb drive.

The individual who posted after you said GEN 1. That is where everything is currently set to. Is there a reason for the variance in people saying GEN 1 or GEN 2?

[wacko]

Is there a reason for the variance in people saying GEN 1 or GEN 2?

People say a lot of stuff without fully understanding it. Someone writes a tutorial somewhere on the web, and then people just start repeating stuff from it whenever they see fit. You don't have to go for Gen 1 if you only run up to 8 GPUs — Gen 2 will work fine. But it's too much for more cards, so if you want 12+ GPUs, for example, you'll have to use Gen 1. In reality though there's usually no difference in hashrate for mining, so selecting Gen 1 is not likely to hurt you. Then again, if you can get more bandwidth with Gen 2 without sacrificing anything else, why not go for it.

[SonicSoundVW]

Is there a reason for the variance in people saying GEN 1 or GEN 2?

People say a lot of stuff without fully understanding it. Someone writes a tutorial somewhere on the web, and then people just start repeating stuff from it whenever they see fit. You don't have to go for Gen 1 if you only run up to 8 GPUs — Gen 2 will work fine. But it's too much for more cards, so if you want 12+ GPUs, for example, you'll have to use Gen 1. In reality though there's usually no difference in hashrate for mining, so selecting Gen 1 is not likely to hurt you. Then again, if you can get more bandwidth with Gen 2 without sacrificing anything else, why not go for it.

Ah I see, thank you for the clarification!

Ive seen people having issues with those mining mother boards.

Somehow I borked windows. so. reinstalling again.

Are there any procedures that I should follow seeing as how im doing a clean install of windows 10 pro? this is the first time I've reached out to the community. Thought I should ask.

Should I follow the guide stickied at the top of this forum? use the scripts and such?

I just think my issue is very peculiar due to two work fine, but then two will, one won't unless its hooked directly to the motherboard, and now 3 work fine. haven't tried the motherboard with the 4th one yet.

are the very latest NVIDIA drivers good to use? Should I use older ones?

Really, any information would be helpful. :-)

[SonicSoundVW]

im almost thinking the motherboard is bad...

[SonicSoundVW]

Ok, bit of an update. I stared with 1 GPU and on the riser in any slot it had code 43.

Put it directly on the motherboard, perfectly fine.

So this is a riser issue?

How I bought 6 risers. you mean to tell me 3 out of 6 are bad?

I have new ones on the way that are a bit different just in case.

Any thoughts?

[CryptoWatcher420]

it can happen, depends on where you are getting them from.

[mittooss]

May or may not happen

[ARTRN]

Dude, you're really pushing your PSU. 750w is barely enough for 2 1070s. You need more watts.

Hardware:
4 x Gigabyte GeForce GTX 1070 WINDFORCE OC 8G REV2.0 Graphic Cards (GV-N1070WF2OC-8GD REV2.0)
1 X Crucial 4GB Single DDR4 2133 MT/s (PC4-17000) SR x8 Unbuffered DIMM 288-Pin Memory - CT4G4DFS8213
1 x EVGA SuperNOVA 750 G2, 80+ GOLD 750W, Fully Modular,

[wacko]

Dude, you're really pushing your PSU. 750w is barely enough for 2 1070s. You need more watts.

The issues he's having have nothing to do with the power, his whole rig consumes ~ 100W idling and at most 350-400W when he's mining with 2 cards. He didn't even get to mining with 3 or 4 cards yet since he can't make the OS to recognize them all.

Ok, bit of an update. I stared with 1 GPU and on the riser in any slot it had code 43.

Put it directly on the motherboard, perfectly fine.

So this is a riser issue?

How I bought 6 risers. you mean to tell me 3 out of 6 are bad?

I have new ones on the way that are a bit different just in case.

Any thoughts?

Could be the risers. Did you enable Above 4g decoding in BIOS?