looked to the Manual, searched topics here - Cuda Settings

This would seem to be so basic as me seeing the answer, but not absorbing it if I am.

I understand GPU goes into 1st PCIe slot -

I understand DR loves Cuda, more GPUs the merrier -

What I am looking for may, in fact, be irrelevant, but I just want to make sure.

The question: within the Nvidia Control Panel and specific to configuring the Control Panel your preference settings in this case setting for DR, are we to use Nvidia "Global Settings" and when given a selection should we be assuming DR will select the best setting to run if we select, "Let Application Control"?

Thanks.

[Peter Chamberlain]

let application control

And the GPU should go into a PCIe ben 3 x 16 slot thats not shared with other slots.. depending on motherboard that may not be the first slot, or if it is, you should not use a slot that shares lanes with the GPU slot.

Thank you Peter.

So I am clear and understanding you correctly: my MB FIRST Slot is Slot #1 PCIe-3_16, Slot #1 and Slot #3 turn into PCIe-3 Dual 8 Lanes IF Slot #1 and Slot #3 are both occupied. Translation: for me to get everything out of the GPU it MUST be in Slot #1 and I lose Slot #3 or "lose" 8 Channels; therefore IF my boot SSD is a PCIe SSD (which it is) for everything to operate at peak DR efficiencies my boot SSD is to be assigned Slot #5 and have 8 Channels.

As there are no other PCIe3 Slots available, an idea I had to go 10GBe SPF+ into a DAS, would be out of the question. This would leave me USB3.1 to a DAS OR a PCIe2 (IF it supports 10GBe SPF) which would put me into a SATA 3 OR USB3.0 speed at best.

Does that sound correct Peter?

[Peter Chamberlain]

With all your other drives in that config i could say what else is going on but yes, if slot 1 and 3 share the lanes then dont use #3.
Id look for a PCIe solution to the DAS connection.

for interest sake.. whats the motherboard model?

DaVinci-Resolve-logs-20180529-222426.zip

Perhaps I ran this when it first happened, or it self generated.

(155.79 KiB) Downloaded 192 times

With all your other drives in that config i could say what else is going on but yes, if slot 1 and 3 share the lanes then dont use #3.
Id look for a PCIe solution to the DAS connection.

for interest sake.. whats the motherboard model?

Peter, thank you very much for the "hand-holding" - much appreciated.

In Sig as you have indicated is a good practice: "ASRock x470 Taichi MB"

The DAS/10GBs SFP+ is to eliminate many of the MB's / SATA HDDs.

It *appears* since upgrading to Beta 15.0.0B.046 my GPU is throwing "ERROR:77" I have attached the log.zip

FYI EDIT: It appears 15.0.0B.046 and Nvidia driver of 5.24.18 *may* present this ERROR:77. Since I posted this last reply I uninstalled 397.93 and rerolled back to 397.64 So far no Error:77s.

With all your other drives in that config i could say what else is going on but yes, if slot 1 and 3 share the lanes then dont use #3.
Id look for a PCIe solution to the DAS connection.

for interest sake.. whats the motherboard model?

Hi Peter.
(I'll be "Re-Pete" here...)

I obtained an iBuyPower Trace 941 desktop sporting for its motherboard, an ASRock Z370 Pro4-IB

Having its supplied ZOTAC GTX 1080 card in 16-Lane PCIe v3 slot #1 (there are only 2) and having added an EVGA Geforce GTX1070Ti in the only-other-available 16-Lane PCIe slot, I'm confused about 2 things:

1) the additional card (1070Ti) has two 8-pin ports side by side, and the manual does a lousy job at making clear how to connect the extra one to power (said to be for auxiliary power to ensure power is not interrupted)

2) Where does one get a motherboard power feed (6-pin) from, to utilize the supplied 6 pin to 8-pin Y-Adaptor if needed?
(In other words, how in the world should I get this card electrically connected to the ASRock Z370 Pro4-IB mobo?

Anyone feel free to provide insights, as I'm unsure whether use of the auxiliary power port on the EVGA GTX 1070TI card is truly necessary as the manual seems to hint at.

(See image below, on which I painted a blue colored trace indicating how I daisy-chained the lone (only 1) ASRock motherboard's PCIe power cable to both, the 1st card (Zotac GTX 1080 having a 6-pin power receptacle) then onto the secondary card (EVGA GTX 1070TI) 8-Pin power receptacle, along the motherboard PCIe dual-receptacle power cable.)
Thanks in advance, Gang.
-[Re]Pete



RStudio 14.3...014 | MiniMon. | DTV 10.9.7 | Win8.1 x64 | ROG G751JL, 2.8GHz Intel i7HQ, 24GB DDR4, 1TB HD, 500GB EVO 850, 2GB GTX965M | Mackie MCU Pro | Softube Console 1 Mkii | Shuttle Pro 2

[Dwaine Maggart]

There is only a single PCIe power cable because it's only a 600 watt power supply. I'd be a bit cautious about connecting both those graphics cards with that supply.

Unfortunately, your GTX1070Ti, being a high end gaming card, takes lots of power. You indeed need to connect BOTH the 8 pin PCIe power connectors on it. You probably would have been better off getting a slightly lesser card, with a single 8 pin power connector, like the 1080 card.

Your pic doesn't show clearly enough what's going on with the power cables you have. As best I can tell from other Trace 941 pics, the single power cable has 2 connectors on it. But all the pics have the 2nd power connector tucked away, since it's not used with the supplied 1080 card. Is the second connector another 8 pin, or is it a 6 pin?

If it's an 8 pin, you simply need an 8 pin PCIe splitter, like this:

https://www.amazon.com/JacobsParts-Expr ... 0586&psc=1

Whether your power supply will like that or not is another matter.

Peter Benson, Hello.

You are using a 600W PS? http://a.co/g4hVJdw <-- Using this will tell you many things. Some of the heaviest power drains occur at boot sequence/POST and it will tell you if you have enough headroom power-wise. How much is enough? Depends where you spend most of your time power-wise which only Killawatt meter would tell you. You could use a PSU calculator, just not live world accurate enough. I can say if your PSU doesn't have other modular ports for powering the GPU card, well upgrade time - for the PSU.

BTW - You can run both GPU cards at the same time for more performance? I was under the impression it only worked to enhance processing if they were the same model.

Also to Dwayne's statement on power, my MB X470 Taichi has an additional 6 PORT PSU slot at the very top of the MB next to the I/O services (including charging output for devices) out the rear of the MB.

Dwayne/Peter- I did change the GPU card's position to the 1st Slot, the C:\Plextor PCIe is now on the last 8 channel PCIe Gen 3. As was expected that Drive Benchmark speed almost halved, where it was doing 1400MBps. Still fast enough that I don't notice.

[Dwaine Maggart]

Assuming he is using Resolve Studio, he can use both cards. But performance and VRAM will be limited to the level of the lesser card.

Assuming he is using Resolve Studio, he can use both cards. But performance and VRAM will be limited to the level of the lesser card.

Hello and thanks Dwaine and Thom.
To the mobo, I added a Samsung 500GB EVO 970 PCIe x4 NV.Me M.2 5, with a view toward installing g Resversion 15's release -- I purchased an EVGA branded 850 watt, additional PSU because I fear addIng another GTX 8GB GPU -- having two power connectors, 8-pin each -- onto the stock 600W GPU's additional PCIe cable leads. For those following this saga, I finally found those unused, extra PSU connection cables tucked behind a panel housing said, stock 600W Hi-Power branded PSU).

So then, the puny 600W Hi-Power stock PSU in the otherwise-capable iBuyPower Trace 941 machine is being enhanced with the ADDITION of a greater-capacity PSU.

Meanwhile I've decided to...

○ KEEP the stock 600W Hi-Power PSU connected to the
ASustek Z370Pro-IB4 motherboard (which is host to the stock ZOTAC GTX 1080 GPU inside the iBuyPower Trace 941 computer

○ POWER HUNGRY: Because I like the idea of 1450 Watts total load capacity -- I've opted to use the two aforementioned PSUs, so therefore I plan to...

○ ADD the new, EVGA 850W PSU but externally -- -- I.e., I plan to keep the newly added PSU parked outside the computer case, but with 2 of its pertinent PCIe cables running under the bottom edge of the computer's tempered glass side panel, into the workstation PC, feeding the newly-added EVGA GTX 1070Ti GPU card's two, side-by-side, 8-pin, female power connectors.

○ ADD the Blackmagic Design Decklink Studio 4K I/O card to one of the still-available PCIe 4x slots (I.e., one which was not obscured by either of the 2, rather thick GPU cards)

QUESTIONS:
1. Which of the two 16x PCIe slots should I insert the faster[I/] of the 2, very different GTX GPU cards into: should it ideally be placed in the x16 slot closest to the CPU?

2. Should that faster of the 2 very different GTX cards be used strictly for CUDA processing (i.e., in media-playback/rendering/grading)?

3. Which of the four 4x PCIe slots should I use for the Decklink Studio 4K I/O card -- [I]considering the fact that whichever of these 2, very thick GTX card is destined for use in the 2nd x16 PCIe slot, that card will surely obstruct access to its neighboring, 4x PCIe slot #3 unless there's such thing as a short adapter cable thingy to purchase, that "reaches underneath" offending x16 card, to access the underlying 4x slot...
(#OohWait! DId I just invent a sorely-needed computer builder accessory?)

4. Which of the 2 cards is the most powerful and should therefore be used for CUDA processing within DaVinci Resolve 15B Preferences (or "Project Settings" -- whichever is applicable)?

5. May I use the 8th Gen i7 Hexacore professor's graphics capability within Resolve somehow?

6. Is there a cost-effective option or D.I.Y. kit for adding an external PCIe expansion for best performance amongst the PCIe peripherals in the system?

As I desire maximum flexibility and PCIe throughput performance in a Resolve Studio 15 host workstation...
7. Does anyone have a link to share, for a cost-effective off-the-shelf or D.I.Y PCIe expansion chassis kit I can add to the iBuyPower Trace 941 PC?

8. Which Linux Distro and instructions link is best suited for me?

I have no Linux experience but...I used to work in the command line interface back in Commodore-Amiga 4000T computer's heyday -- but know nothing about the weird, seemingly convoluted, LINUX variants which in my view, are largely dated in that many are still-not-yet-ready-for-primetime (drivers-wise especially, and CLI-dependent particularly, as they gave immature GUI propertues, features and functionality compared to OSX and Micro$haft Windblows (sic).

[

Assuming he is using Resolve Studio, he can use both cards. But performance and VRAM will be limited to the level of the lesser card.

UPDATE
I purchased an EVGA branded 850 watt PSU to replace the puny 600W Hi-Power stock unit originally, but now I've temporally decided to

....
3) ADD the Blackmagic Design Decklink Studio 4K I/O card to one of the still-available PCIe 1x slots (I.e., one which was not obscured by either of the 2, rather thick GPU cards)
...
Sent from my P00I using Tapatalk

Hi,

Are you sure the Decklink will work properly in a 1x slot when you need a 2x or 4x slot?

There is only a single PCIe power cable because it's only a 600 watt power supply. I'd be a bit cautious about connecting both those graphics cards with that supply.

Unfortunately, your GTX1070Ti, being a high end gaming card, takes lots of power. You indeed need to connect BOTH the 8 pin PCIe power connectors on it. You probably would have been better off getting a slightly lesser card, with a single 8 pin power connector, like the 1080 card.

Your pic doesn't show clearly enough what's going on with the power cables you have. As best I can tell from other Trace 941 pics, the single power cable has 2 connectors on it. But all the pics have the 2nd power connector tucked away, since it's not used with the supplied 1080 card. Is the second connector another 8 pin, or is it a 6 pin?

If it's an 8 pin, you simply need an 8 pin PCIe splitter, like this:

https://www.amazon.com/JacobsParts-Expr ... 0586&psc=1

Whether your power supply will like that or not is another matter.

I found the 600W stock Hi-Power PSU's additional connection cables hiding beneath the compartment housing the PSU and drives -- but thanks so much to you and others for all the helpful insights!

Sent from my P00I using Tapatalk

Assuming he is using Resolve Studio, he can use both cards. But performance and VRAM will be limited to the level of the lesser card.

UPDATE
I purchased an EVGA(r) branded 850 watt PSU to replace the puny 600W Hi-Power(r) stock unit originally, but now I've temporally decided to

....
3) ADD the Blackmagic Design Decklink Studio 4K I/O card to one of the still-available PCIe 1x slots (I.e., one which was not obscured by either of the 2, rather thick GPU cards)
...
Sent from my P00I using Tapatalk

Hi,

Are you sure the Decklink will work properly in a 1x slot when you need a 2x or 4x slot?

I keep referring to those four 1.5 inch PCIe slots as single lane (i.e., 1x) but they are indeed 4x. Thanks Jean, for the inference to my need for correction.

Peter

ResolveStudio 14.3...014 | MiniMonitor | DTV 10.9.7 | Win8.1 x64 | ROG G751JL, 2.8GHz Intel i7HQ, 24GB DDR4, 1TB HD, 500GB EVO 850, 2GB GTX965M | Mackie MCU Pro | Softube Console 1 Mkii | Shuttle Pro 2