DELL R710 Additional graphics card install

Before doing anything mentioned below please read the whole article
In the following article I am going to show and explain the proccess of installing an additional GPU to a Dell PowerEdge R710 server.
Please keep in mind that I am NOT responsible for any damage done to your hardware during an attempt to do what I show here.
Remember that the following article is partially universal, so for example the modding of the riser in Dell R710 will also apply to the R610 riser. Also remember that the following modifications include cutting and doing irreversible changes to your hardware

Prerequisites

Before you begin with installing a GPU into that R710, you need to have:

• a basic toolkit (screwdrivers, wire cutters etc.)
• a precise drill
• a saw for metal (optional, because if you will be installing a smaller graphics card for example a GTX 1060, you will not need to cut the Riser 2 bracket.
• a soldering iron. I highly advise you to NOT use a typical transformer soldering iron. Instead you should use a precise soldering iron, most likely with a flat-edge soldering tip.
• Of course you need to have some flux and solder
• Also, you most definetly need to have a basic knowledge about things like soldering and electronics.
  

I strongly advise you to only do this if you do know what you are doing. Remember that there are multiple tutorials on Youtube and if something in my article will be unclear to you, just check the videos that other people made.
Below are photos of the front and upper side without cover of the server

What will you need to buy

• Your wanted GPU
• a PCIe power cable (one that fits your card power pins, preferably a 8 pin | However that is optional as some gpus do not need a power supply cable)
• preferably another motherboard power cable for the R710 (not necessary, just a precaution)
• some electrical tape
  

Requirements

Remember that the Dell R710 has limited space for a GPU. You can enlarge that space by cutting a part of the Riser 2. However, you can not make the width of the space bigger, as it would involve interfering with Riser 1 which has a dedicated slot for the RAID controller.

First step - preparing the Dell R710 Riser 2

Preparing the Riser 2 for modifications includes using a drill or a soldering iron. In this step we will "open" the PCIe x8 slot on the riser. "Opening" the slot is just a fancy word for cutting off a piece of plastic that blocks you from physically inserting a GPU with a PCIe x16 connector into a x8 slot. You will need to mount the riser on a stable surface. Now, there are two ways to do this mod. First one includes a precise drill, and the other inludes a soldering iron.