An Nvidia RTX A4000 GPU in the Dell PowerEdge T640 without the GPU kit

I jJust wanted to report the success of replacing my Quadro P2200 (5G) with an RTX 4000 (16G) in my T640.

The A4000 GPU is a 140W single-slot GPU. It takes power from an X16 PCIe slot (75W) and needs a 6pin PCIe connector for the rest (65W).

Since I like my T640 silent, the GPU PDU board was not an option for me. On the T640 platform, adding the GPU PDU board under the mainboard makes the machines require to add the infamous and noisy GPU External fans (pictured below, along with the GPU PDU Board):

The lower half of my T640's front is occupied by a 16x2.5 SFF SAS/SATA backplane which luckily has a cable with two SATA connectors on its back:

With that in mind, I did the follwing Math: a SATA connector can carry up to 54W, which meant a total of 108W for the two SATA connectors. The 6pin PCIe connector required to power the A4000 will likely not exceed 65W since 75W is coming from the X16 PCIe slot.

With that in mind, a very Simple StarTtech dual-SATA to PCIe 6pin adapter was obtained from amazon, which allowed the SFF backplane to feed the A4000:

The Adapter used was:

StarTech.com 6in SATA Power to 6 Pin PCI Express Video Card Power Cable Adapter - SATA to 6 pin PCIe power (SATPCIEXADAP) : https://www.amazon.ca/dp/B007Y91B80

All good so far under load (Used the Valley Benchmark for an hour to confirm):

The T640 is definitely my favorite Frankenstation! :)