Is anyone having trouble with their radeon VII on cMP I can’t get the VII going today. Having to revert to the 7970
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is the external PSU "turned on"? if it is not going through a mobo with a power ON/Off switch you have to jumper the power On/Off switch.
Yes. Seems all good Radeon VII fans spin to 100 percent When cMP not on. When on they spool down to quiet but no vision. The Radeon 7970 also shows no vision
When Radeon VII has power disconnected the 7970 takes over and the cMP boots up OK
When Radeon VII has power disconnected the 7970 takes over and the cMP boots up OK
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Can you check the operation of the 7970 with all internal power (using 2 extra sata power connectors)
This may help with correct powering of the HD 7970
https://forums.macrumors.com/threads/evga-powerlink-with-amd-gpus.2166917/
https://forums.macrumors.com/threads/evga-powerlink-with-amd-gpus.2166917/
We seem to have diverged from the subject.
The 7970 works fine on its own in the cMP.
They worked fine together until yesterday morning.
Then Radeon VII stopped the cMP booting even when the 7970 is connected. And the Radeon VII no longer works on its own light comes on fans spin up and down but no screen displays.
The 7970 works fine on its own in the cMP.
They worked fine together until yesterday morning.
Then Radeon VII stopped the cMP booting even when the 7970 is connected. And the Radeon VII no longer works on its own light comes on fans spin up and down but no screen displays.
If you are running two cards the HD 7970 powering is important,
What is your 7970 cabling setup ( in detail ) ?
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What is your 7970 cabling setup ( in detail ) ?
Please make a "signature" in your Macrumors profile.
All the people trying to help you have signatures.
My " sig" is at below this text.
Wow, finally my Radeon VII arrived today which replaced my Vega 64 LE. I must say, I am really surprised how much better the cooling is on the new Vega 7 and how bad the reference cooler from the Vega 64 is. I thought it would be just a little bit, - incremental at best.
But the cooling is waaay better, Vega 7 can handle a lot more heat as it seems at first glance.
I will make an intense burn in the next weeks and put the new Vega under some pressure. But the first impression is actually really really nice. The fans are surprisingly quiet under low, normal conditions.
@DavideDigitalFilms
I am sorry to hear, that you got problems with the new Vega. My old Vega 64 behaved like that at times. I would try different Display Ports with new boot up's in between. My old Vega 64 had some problems, it seems that the display port cable or plug is "kind of skiddisch". It does not really fit very snug and has some wiggle room somehow. Maybe the pins are too far back or borderline contact the card. Since I still use an old original Apple Display 27 with MiniDisplay Port to Display port adapter, I always suspected the adapter to be kind of bad. Out of 10 plug and unplug I would have at least one time with now screen. Check the port and the Plug on the cable. If you have a spare cable, try that one as well. It sounds simple, but with my experience on that DP Port, I would try this first.
Thanks Alex and Mikx That’s verdy exciting about your Radeon VII arriving have you got it going? I will have a look at your and Mikx’s suggestions tomorrow and update my sig and get back.
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Ha! Found you just by looking at your signature Hendrik
Could be interesting to catalog how much those VII actually draw to see dual card viability inside the Mac.
Single VII yes, but never a dual Setup...
Hey MIKX you may be on to something! I don’t seem to be able to run The 7970 from the external supply only the internal mini 6 pins
Hang on that has just changed it just took forever to boot up!?!
DavideDigital-Films
This is how I power my Sapphire Dual-X HD 7970 - it's very stable.
https://forums.macrumors.com/threads/evga-powerlink-with-amd-gpus.2166917/#post-27038019
This is how I power my Sapphire Dual-X HD 7970 - it's very stable.
https://forums.macrumors.com/threads/evga-powerlink-with-amd-gpus.2166917/#post-27038019
That was my concern. The question is has anybody powered the card mixing internal and external voltages? They have different return paths for the common wire (for the 12 VDC the positive on the PCIE slot on one hand and the 6+8 pin connectors on the other). Moreover could that damage some baseboard voltage regulators?
It runs like never before...
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Am I right, that 7 does not have boot screens? How about hw acceleration support, did you check VideoProc? And maybe can you share some benchmarks?
Radeon VII has no boot screen. And also need WhateverGreen board-id injection to allow H264 hw accel and H265 hardware decode.
I was planning to buy a Pulse RX 580 because I was under the impression that this would give me boot screen support, but apparently that’s wrong. A few questions:
1) What’s the advantage of buying a card from the Apple list, then?
2) Is the GeForce GTX 680 then the fastest card available that supports the boot screen?
Getting FileVault running on Mojave and Windows gaming are my ultimate goals here. Would some kind of dual-card setup with an old Metal- and boot-screen-compatible GPU for MacOS and a modern GPU for Windows be a viable solution?
1) What’s the advantage of buying a card from the Apple list, then?
2) Is the GeForce GTX 680 then the fastest card available that supports the boot screen?
Getting FileVault running on Mojave and Windows gaming are my ultimate goals here. Would some kind of dual-card setup with an old Metal- and boot-screen-compatible GPU for MacOS and a modern GPU for Windows be a viable solution?
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1) Have NATIVE driver support.
2) Depends on usage. For CUDA, yes. For FCPX no.
FileVault is not supported on cMP in Mojave by default regardless which GPU you are using. Hack is available, but required a completely new clean Mojave installation.
"Modern GPU for gaming" is impossible if you want boot screen and Mojave at the same time.
MVC flashed card allow you to use up to Titan XP for Windows gaming and boot screen, but not Mojave.
Radeon VII allow Mojave and gaming, but not boot screen.