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Sapphire Vega 56 Nitro+ Limited Edition as eGPU. Can it be done?
 

Sapphire Vega 56 Nitro+ Limited Edition as eGPU. Can it be done?  

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OliverB
(@oliverb)
Noble Member
Joined: 11 months ago
 

Hello dear community,
I would really like to buy a Sapphire Vega 56 Nitro+ Limited Edition, but then I saw it has 3 x 8pin connectors. Can it be used as eGPU? Has somebody done it?

11

This topic was modified 4 months ago

2018 15" MBP & 2015 13" MBP connected to RTX2080Ti GTX1080Ti GTX1080 Vega56 RX580 R9-290 GTX680


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joevt
(@joevt)
Honorable Member
Joined: 2 years ago
 

Three 8-pin connectors means 450W. 75W for the PCIe slot. 525W total.

The following links say the card can draw up to more than 400W and less than 500W (Sapphire website has a Nitro+ and a Nitro LE but no Nitro+ LE?):
https://www.overclockersclub.com/reviews/sapphire_nitro_limited_edition_radeon_rx_vega_56_8gb_hbm2/9.htm
https://bit-tech.net/reviews/tech/graphics/sapphire-radeon-rx-vega-56-nitro-review/10/
https://www.sapphiretech.com/en/consumer/nitro-rx-vega56-8g-hbm2-le_c
https://www.sapphiretech.com/en/consumer/11276-01-nitro-rx-vega56-8g-hbm2

Seems like any eGPU with 500W available to the GPU should work. That means those with 500W highlighted in green that are listed at:
https://egpu.io/external-gpu-buyers-guide-2019/

I guess you need to check the available power rails and plugs, and figure out how to populate all three 8-pin connectors. There are nine 12V wires needed, 50W per wire 4.17A each. Standard 18 AWG wire is more than sufficient but 16 AWG is better (less voltage drop and melts at a higher temperature). This example product says 20A 240W for a two-wire 26in 14 AWG cable.

Or replace the eGPU's power supply.

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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(@jay_weeks)
New Member
Joined: 4 months ago
 

I purchased one of these as well as a Razer Core X not realizing the power couplings didn't match.
The Core X supports up to 500W draw, and the Nitro 56 should draw max up to 450W according to its specs.
Would it be possible to find different cables / an adapter to hook it up to the power supply of the Core X enclosure?

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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sabrefv
(@sabrefv)
Eminent Member
Joined: 7 months ago
 

What type of PCI-E power connector and how many do you have in the razer core X? If the current power supply produces enough power can you use splitters to plug into the 3 x eight pin connectors? I'm not an expert on power.
this one
https://www.ebay.com/itm/PCI-E-6-pin-to-2x-6-2-pin-6-pin-8-pin-Power-Splitter-Cable-PCIE-PCI-Express/151501045756?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
 together with this one
https://www.ebay.com/itm/60cm-18AWG-6Pin-Male-to-6Pin-Male-Video-Graphics-Card-PCI-E-Power-Adapter-Cable/173414879050?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

those two will split one 6 pin PCI-E power cable into 2 x 6pin+2 which will connect up 2 of the 8 pin connectors if you can use a splitter.

Lenovo Yoga 730, Dell XPS 13
Akitio Node, Gigabyte Aorus 1070
Sapphire Nitro RX 580, Nvidia GE Force GTX 1070


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(@jay_weeks)
New Member
Joined: 4 months ago
 

Yeah, I did a bit more research and got a female 8 pin to 2x 6+2 pin adapter.
The power supply has 2x 6+2 pin cords, so I split one to supply the 3x 8 pins on the GPU and it seems to be running well.

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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sabrefv
(@sabrefv)
Eminent Member
Joined: 7 months ago
 

@jay_weeks this is good news. I was reading back over @joevt post and it seems like as long as the power supply's 12v rail (hopefully there is only one 12V rail supplying all the power) can supply enough power to both 2 x 6+2 pin cords (one of which is split into 2 cords) you should be good and can continue to supply power to the GPU without any interruptions. Good to see it is working ok so far.
@oliverb looks like @jay_weeks accomplished what you were looking for at the beginning of the post with a razer core x enclosure and the Vega 56 Nitro!!

Lenovo Yoga 730, Dell XPS 13
Akitio Node, Gigabyte Aorus 1070
Sapphire Nitro RX 580, Nvidia GE Force GTX 1070


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OliverB
(@oliverb)
Noble Member
Joined: 11 months ago
 
Posted by: sabrefv

@oliverb looks like @jay_weeks accomplished what you were looking for at the beginning of the post with a razer core x enclosure and the Vega 56 Nitro!!

@sabrefv
Are you sure about it? Keep in mind that there is a Vega 56 Nitro and a Vega 56 Nitro+ Special Limited Edition. Only the latter one needs the three power cables... 🙂

This post was modified 4 months ago

2018 15" MBP & 2015 13" MBP connected to RTX2080Ti GTX1080Ti GTX1080 Vega56 RX580 R9-290 GTX680


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sabrefv
(@sabrefv)
Eminent Member
Joined: 7 months ago
 

@oliverb
@jay_weeks is plugging in 3 x 8 pin power cables into his GPU so I'm assuming he has the Nitro+
There are two 6+2 pin power cables coming from his razer core x enclosure's power supply.
One of those he plugs into one set of 8 pins. For the other cable he has installed a splitter cable (1 x 8 pin female to 2 x 6+2 pin male) giving him 2 x 6+2 (2 x 8 pins) which he plugs into the other two sets of 8 pins on his GPU. That's 3 x 8 pins.
At least that's how I understood it from his description..

Lenovo Yoga 730, Dell XPS 13
Akitio Node, Gigabyte Aorus 1070
Sapphire Nitro RX 580, Nvidia GE Force GTX 1070


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sabrefv
(@sabrefv)
Eminent Member
Joined: 7 months ago
 

Something similar to this

Lenovo Yoga 730, Dell XPS 13
Akitio Node, Gigabyte Aorus 1070
Sapphire Nitro RX 580, Nvidia GE Force GTX 1070


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(@gareth_rees)
Eminent Member
Joined: 5 months ago
 

there are two models of the nitro+, one with 2 and one with 3. ive never seen the one with 3 for sale in the US

Dell Latitude 5491 14" BIOS 1.8.1 | Core i7 8850H + liquid metal - | 32GB DDR4 2400 | Samsung 512GB PM981 AS SSD 4600 score | | MX130 + liquid metal | Logitech Z-2300 | Razer Death Adder Chroma | Corsair K70 Rapdifire | HP Omen Accelerator 700W PSU + STRIX Vega 56 8GB HBM2


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(@jay_weeks)
New Member
Joined: 4 months ago
 

Yeah, @sabrefv is correct. It's a Sapphire Nitro+ Vega 56 Limited Edition; it requires 3x 8 pin power connections, so I split one of the output cords from the power supply.
There are many available on eBay, which is where I found mine.

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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OliverB
(@oliverb)
Noble Member
Joined: 11 months ago
 
Posted by: Jay Weeks

Yeah, @sabrefv is correct. It's a Sapphire Nitro+ Vega 56 Limited Edition; it requires 3x 8 pin power connections, so I split one of the output cords from the power supply.
There are many available on eBay, which is where I found mine.

Yeah... I guess it's quite too much for my Asus XG Station Pro (300W)... what a shame :/

2018 15" MBP & 2015 13" MBP connected to RTX2080Ti GTX1080Ti GTX1080 Vega56 RX580 R9-290 GTX680


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