2016 14" Dell Latitude E7470 [6th,2C,U] + RX 470 @ 16Gbps-M.2 (ADT-Link R43SR) +...
 
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2016 14" Dell Latitude E7470 [6th,2C,U] + RX 470 @ 16Gbps-M.2 (ADT-Link R43SR) + Win10 // Detachable with R44UF  

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topazo
(@topazo)
New Member
Joined: 6 months ago
 

System specs

Dell Latitude E7470 14" (2560x1440)
CPU: i5-6300U @ 2.40GHz
iGPU: Intel HD Graphics 520
Windows 10

eGPU hardware

ADT-Link R43SR (NVMe M.2), cable 25 cm
ADT-Link R44UF (NVMe M.2) 90 degree extension cable 15 cm
ASUS RX 470 Mining 4GB
Dell DA-2 power supply

Hardware pictures

Hardware steps:

  1. Created a custom power cable:
    - Cut a ATX female connector into two pieces (8 pin + 6 pin)
    - Created power cabling so that 8 pin connector (for DA-2) power & ground cables are connected to 6 pin connector (for GPU) and floppy disk connector (for R43SR)
    - Added a BS170 mosfet transistor to connect DA-2 remote to ground if it detects 3.3v power from PCIe through floppy disk power cable (see next line)
  2. Added soldering tin to small solder pad next to R43SR floppy disk power connector. This connects PCIe 3.3v to floppy disk power red cable
  3. Built a custom case from eyeglass-case (Armani™), form factor similar to EXP GDC
    - Holes for 8 pin and 6 pin connectors
    - Hole for floppy disk power connector
    - Custom power cable inside
    - R43SR attached with screws on top
  4. Removed original SSD disk from laptop's M.2 slot
  5. Filed small opening to laptop case for R44UF cable
  6. Plugged R44UF M.2 extender to M.2 slot
  7. Added some self-fusing tape to make M.2 cabling more rugged
  8. Installed 2242 M.2 NVME SSD disk to laptop's WWAN port


Software steps:

  1. Clean installed Windows 10
  2. Plugged graphics card & power supply to my custom eGPU case
  3. Booted Windows 10 --> OS recognised new card and automatically installed AMD drivers

Nothing else. No error 43.

Benchmarks

Comments

I had EXP GDC earlier and definitely wanted to have detachable setup so that I can easily move the laptop around and travel.

This was more like a hobby project to get deeper knowledge on this topic. It would have been so much easier to just buy R43SG Smile . But there was also some uncertainty if detachable cable is reliable so I wanted to try with cheaper components.

I'm quite happy with end result. After few weeks of usage, I haven't noticed any unreliability either in PCIe connection or automatically waking up DA-2 from PCIe 3.3v voltage. I think both are flagged generally as risks by this forum.

Only downside is that I expected to get PCIe x4. But if I understand Intel's spec correctly, this CPU only supports 1x2 + 2x1 when there are also other PCIe devices connected (WLAN and SSD). So x2 seems to be the max value for me.

Benefits over previous M.2 A+E EXP GDC setup:

- PCIe x2 speed vs previous x1
- Original WLAN card can be used
- SSD plugged into WWAN slot is a bit faster (even it is 1x) than original M.2 SATA disk

Laptop's internal display is used. Haven't tested external display.

2016 14" Dell Latitude E7470 [6th,2C,U] + RX 470 @ 16Gbps-M.2 (ADT-Link R43SR) + Win10 // Detachable with R44UF [build link]  

joevt and nando4 liked
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nando4
(@nando4)
Noble Member Admin
Joined: 5 years ago
 

Indeed, Dell configured the E7270 / E7470 with a x2 3.0 M.2 slot. As per https://www.dell.com/community/Laptops-General-Read-Only/Dell-M-2-NVME-Specifications-And-Upgrade-Requirements-For/td-p/5072834

Latitude  E7270 | E7470:

 

maximum internal dives supported: 1

Drive configurations supported: (1x M.2)

PCIE Lanes:

M.2 slot supports 2X    

eGPU Setup 1.35    •    eGPU Port Bandwidth Reference Table

 
2015 15" Dell Precision 7510 (Q M1000M) [6th,4C,H] + GTX 1080 Ti @32Gbps-M.2 (ADT-Link R43SG) + Win10 1803 // compares M.2 vs TB3 performance inc unoptimized H-CPU BIOS [build link]  


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