2016 14" Dell Latitude E7470 [6th,2C,U] + RX 470 @ 16Gbps-M.2 (ADT-Link R43SR) + Win10 // Detachable with R44UF
Dell Latitude E7470 14" (2560x1440)
CPU: i5-6300U @ 2.40GHz
iGPU: Intel HD Graphics 520
- 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)
- 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
- 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
- Removed original SSD disk from laptop's M.2 slot
- Filed small opening to laptop case for R44UF cable
- Plugged R44UF M.2 extender to M.2 slot
- Added some self-fusing tape to make M.2 cabling more rugged
- Installed 2242 M.2 NVME SSD disk to laptop's WWAN port
- Clean installed Windows 10
- Plugged graphics card & power supply to my custom eGPU case
- Booted Windows 10 --> OS recognised new card and automatically installed AMD drivers
Nothing else. No error 43.
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 . 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.
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)
M.2 slot supports 2X