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External PSU for the Razer Core V2
 

External PSU for the Razer Core V2  

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lefuturdelavenir
(@lefuturdelavenir)
Active Member
Joined: 1 year ago
 

I've build a custom cable that fits the original power connector and allows to use a standard ATX power supply instead of the noisy fATX.

I'm using an old Dell power supply for now in order to validate this solution. So far it's working perfectly.

I'm looking for a modular PSU for a more permanent and better looking solution. I think I will also add a power switch that force the PSU off when I am not using it, even when my MacBook is plugged.

egpu03

MacBook Pro 2017 no-touchbar; Razer Core V2; RX 560


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itsage
(@itsage)
Famed Member Admin
Joined: 3 years ago
 

This is a cool idea. Is there an extension cable long enough to locate the PSU under the desk for example?

Best ultrabooks for eGPU use | eGPU enclosure buying guide


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lefuturdelavenir
(@lefuturdelavenir)
Active Member
Joined: 1 year ago
 

I'm working on it.
I planned to build a extension cable using the same method I used to build the adapter: by joining multiple wire into a brained sleeve. Turns out the 18 wires, when grouped together, are quite stiff and not easy to manipulate. So I'v looked for another solution.
I'm building a cable that only transport 12v to the Razer Core from a standard EPS-12v connector plugged into an ATX modular power supply. The challenge is to convert the 12V to 5V and 3.3V inside the box.
I'll post my progress if I don't burn my apartment to the ground during the process  😎

MacBook Pro 2017 no-touchbar; Razer Core V2; RX 560


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damonhayhow
(@damonhayhow)
Eminent Member
Joined: 3 years ago
 

have you or anyone found a higher wattage PSU that will fit in the core v2?

2018 15" Macbook Pro I7 2.6 Ghz / 16Gb / 512 Gb / 560X. 2x LG Ultrafine 4K displays. Razer Core V2 eGPU, Radeon RX580, Sunnix UPD2018 Displayport adapter.


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lefuturdelavenir
(@lefuturdelavenir)
Active Member
Joined: 1 year ago
 

Personally I have not. I've look into the fATX format and found some power supply made for rack servers. Those can be very powerful but they are very noisy. Definitely not designed to be used in a silent configuration.
I've make a try with this power supply that I've found and modify to integrate a 92mm fan on the side. Placed near my rx570 small form factor it was a perfect fit. Just before the final assembly I've check the voltage just to realise the PSU was somehow dead from the start. That was a great waste of time and now I know I have to check this BEFORE working on it. Anyway, it can give some idea to someone.

egpu02
egpu01

MacBook Pro 2017 no-touchbar; Razer Core V2; RX 560


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damonhayhow
(@damonhayhow)
Eminent Member
Joined: 3 years ago
 

I am not so fussed about the silent configuration, myself. I need to feed a smidge more power to the graphics card? Is there any chance the 65W of power dedicated to charging the host computer could be rerouted to the graphics card? Or is it integrated too tightly into the TB3 controller?

2018 15" Macbook Pro I7 2.6 Ghz / 16Gb / 512 Gb / 560X. 2x LG Ultrafine 4K displays. Razer Core V2 eGPU, Radeon RX580, Sunnix UPD2018 Displayport adapter.


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lefuturdelavenir
(@lefuturdelavenir)
Active Member
Joined: 1 year ago
 

The charging power is not dedicated. If you don't use the charging capability you can theoretically use this power for the GPU.
Almost all the power comes from the single 12V rail from the PSU. Based on the indications fond on the PSU side, this rail is 41A capable so 492W. I suppose that if you don't use the charging capability or any usb port or ethernet you could push the GPU to 400w, maybe 450w. I would not recommend it thought. 
If you want to go further you can use a standard external ATX power supply (mine is 750w). But you will have to build the cable.

MacBook Pro 2017 no-touchbar; Razer Core V2; RX 560


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Eightarmedpet
(@eightarmedpet)
Noble Member
Joined: 3 years ago
 

@lefuturdelavenir love this mod! I have no idea where to start with most electronic stuff - especially cables. If I asked super nice and paid would you consider really nice would you consider making another?

2017 13" MacBook Pro Touch Bar
GTX1060 + AKiTiO Thunder3 + Win10
GTX1070 + Sonnet Breakaway Box + Win10
GTX1070 + Razer Core V1 + Win10
Vega 56 + Razer Core V1 + macOS + Win10
Vega 56 + Mantiz Venus + macOS + W10

---

LG 5K Ultrafine flickering issue fix


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marpid
(@marpid)
Active Member
Joined: 3 years ago
 

I know this post is from a while ago, but I intend to do a similar mod. Would you mind sharing the definition of the 10 pin connector on the main board? I’d like to know which cable is which before I start (e.g. 12V, 3.3V, etc). If you could kindly share this information, that would be awesome. Thanks in advance.

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


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Rvrd90
(@rvrd90)
New Member
Joined: 7 months ago
 

I second the motion to sharing the 10 pin connector diagram.  My Core V2 PSU failed.  Searching for a compatible Flex ATX PSU has been futile.  TIA.

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


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lefuturdelavenir
(@lefuturdelavenir)
Active Member
Joined: 1 year ago
 

Sorry I've been out for long. Here is an update on this mod.

I've made another cable that plugs directly to my modular PSU (Corsair AX750). This is way cleaner than the previous one and the fact the PSU is dead silent is very appreciable. I've also change the video card for a blower form factor that takes the heat out of the case.

Here is some elements to consider when building your own:

The PSU needs to be single rail. Regarding power, PSU have to sustain the video card power + charging power + peripheral power + reasonable margin. In my case: 150w + 60w + 20w + 20% = 275w.

The wiring has to be big enough. Low voltage means high current means big wire section. I use two different cable section here: 18AWG for the real payload (ground and 12v) and 20AWG for the rest. Total 11 wires. Theoretical voltage drop on the 12v line is about 0,1v under 275w load.

  Nb cable Cable section Total section Indicative max current Indicative max power
Ground 4 1,31 5,24 88  
12v 3 1,31 3,93 66 800
5v 1 0,82 0,82 16 80
3,3v 1 0,82 0,82 16 50
5vSB 1 0,82 0,82    
PWRON 1 0,82 0,82    

The cables goes into the case trough the C13 power connector hole. I've design a 3d printed cover because style is important.

The board connector is a JST VHR-10N. Razer choose standard colour wires so the pinout is fairly easy. Pin number one is on the rear side of the case.

Pin nb 1 2 3 4 5 6 7 8 9 10
Color Green Purple Orange Red Black Black Black Black Yellow Yellow
Usage PWRON 5vSB 3.3v 5v GND GND GND GND 12v 12v

Two molex connectors provides 12v to the board and to the video card.

I'm using a blower style video card in order to take the heat out of the case. The video card fan is the only fan of the case.

New DSC00958
New DSC00963
New DSC00960

MacBook Pro 2017 no-touchbar; Razer Core V2; RX 560


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lefuturdelavenir
(@lefuturdelavenir)
Active Member
Joined: 1 year ago
 

@eightarmedpet It's been a while since your message regarding the ATX cable for Razer core V2. I'm not using the one I've buid last year so if you want it I'll be glad to send it to you. Give me your postal address and I'll make a cotation for the shipping.

MacBook Pro 2017 no-touchbar; Razer Core V2; RX 560


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itsage
(@itsage)
Famed Member Admin
Joined: 3 years ago
 

@lefuturdelavenir Amazing work on making the external PSU cables your Razer Core V2! Thank you also for sharing the details and photos.

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brookafish
(@brookafish)
New Member
Joined: 3 months ago
 

@lefuturdelavenir

I have the core V1 and the PSU just died, did you already give away that cable? Also, would you be willing to sell that PSU you took out (if you still have it)?

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


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lefuturdelavenir
(@lefuturdelavenir)
Active Member
Joined: 1 year ago
 

@brookafish

Hi. I still have the cable and the original PSU. Those are designed to fit the V2 but I guess they will be fine in the V1. Can you confirm the colours of your PSU connector matches the one I've post? Let's continue via private message.

MacBook Pro 2017 no-touchbar; Razer Core V2; RX 560


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Ningauble77
(@ningauble77)
Estimable Member
Joined: 2 years ago
 

Nice work, I was feeling industrious today and partially dismantled my Core v2 to replace the PSU fans with 2 Noctua NF-A4x20 FLX fans, purchased from Amazon

https://www.amazon.com/gp/product/B072JK9GX6/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1

It took me quite some time to figure out how to get the PSU out, and the existing fan mounting screws didn't fit the Noctuas.  I used the included Noctua Screws and 3M Omnijoin adapters with these connectors I had purchased as well:

https://www.amazon.com/gp/product/B07RJG81HX/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

Slapped everything back together, and unfortunately the annoying high pitched fan sound remains, it must be the fans at the bottom of the chassis making the worst of it.

I did do a little before and after testing:
Stock PSU Fans Idle: 63.4db
Stock PSU Fans After running Unigine Valley Benchmark: 70.2db

Overall, somewhat disappointed with the results, at least in my case, the PSU fans aren't the noisiest component.

Noctua PSU Fans Idle: 58.3db
Noctua Fans Unigine Valley: 66db

This post was modified 3 months ago

2018 13 Macbook Pro + Core v2 + Radeon VII MacOS 10.14.6
Core X Chroma + RTX 2080 Windows 10 1903


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lefuturdelavenir
(@lefuturdelavenir)
Active Member
Joined: 1 year ago
 

@ningauble77

Industrious indeed! Well done and thank your feedback. Did you take some pics?

Those PSU are definitely not designed to be silent. Razer clearly make a mistake by choosing this form factor. They had no choice but to changed the design with the new razer core models.

Tiny fans are a real pain and I don’t think there is any solution but to use bigger fans like the new models. Sadly.

MacBook Pro 2017 no-touchbar; Razer Core V2; RX 560


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Ningauble77
(@ningauble77)
Estimable Member
Joined: 2 years ago
 

Unfortunately I didn't take any photos, in part because the omnijoin connectors squirted some kind of liquid onto my hands when was I adapting the fan power cables and I was paranoid about getting anything that seemed like glue on my phone.  I'm wondering if raising the core v2 off the desk on a stand might improve the bottom fan acoustics.

2018 13 Macbook Pro + Core v2 + Radeon VII MacOS 10.14.6
Core X Chroma + RTX 2080 Windows 10 1903


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OopsMyDogDied
(@oopsmydogdied)
New Member
Joined: 4 weeks ago
 

I was planning on replacing the PSU from my Razer Core v1, but am not particularly savvy when it comes to wiring. Would you happen to be able to make a cable and sell it?

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


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