GPU Risers | Why Do We need GPU Risers for Our Ethereum Mining Rig?
Main Reasons why its Important to have GPU Risers for Multiple GPU Mining Setups.
You only need a riser if you are putting it in a x1 slot or if the motherboard won't accommodate that many cards that close together.
For a 1/2 GPU mining setup there is no reason to use a riser (in fact you should avoid risers if you can)
Powered PCI-E risers cables are essential when building a Bitcoin or Litecoin mining rig so your motherboard does not get burnt out. Used by Bitcoin and Litecoin miners to rise the important graphics cards from their motherboard and space them out better for cooling and to enable more GPUs to be used.
Motherboards have two different sized PCI-E slot sizes. They are commonly referred to as PCI-E 1X and PCI-E 16X - See below for example.
Video cards are designed to use the 16X size on your motherboard due to this size allowing much more performance in gaming environments; it allows for up to 16 connections/lanes to the motherboard which is why it is called 16X.
Some cables are called Powered Cables. Video cards connected to your motherboard either directly or via cables use some level of power from the motherboard. Instead of using the motherboard power supply, the powered cables have an additional Molex connector to plug into the cable thereby directly supplying the 12 volt line, which in turn does not consume power from the motherboard - as long as the cable is made correctly and the 12 volt lines are properly connected.
How Do I Install A Riser Cables:
The instructions below should work with any system but take caution when proceeding. If something is not right, please e-mail us a detailed question and we will try to help you! Before using the riser cables, please secure your motherboard and video cards.
NOTE: The motherboard used in the photos below is not a board we use or suggest for mining. It was just used for example purposes.
Mount your motherboard and video card so the cable will not be strained and pulled.
First decide what kind of slot you are using (1X or 16X). For an example picture of slot size, click the link below.
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Properly align the cable to the slot on the motherboard until no gold connectors are visible. The 16x cables may take a little pressure but do not apply too much. Look carefully at the key (see photo) slot to make sure the cable is going in the correct way. Make sure the alignment is correct for the 1X cable to slot since the cable is much smaller.
Show Example PhotoPCI-E Key Example
PCI-E 1X ExamplePCI-E 16X Example
Insert the cable into your video card until you can not see any gold connectors on the video card .The cables may take a little pressure but do not apply too much. If your cable has a locking clip, make sure it securly attaches to the video card. Depending on the locking clip, you will need to disengage it to remove the cable.
Show Example Photo
The examples below are showing a 16X cable. The 1X install process is the same procedure.
How To Install A PCI-E 1X Jumper Wire
Some motherboards will require the use of a simple Jumper Wire to recognize the slot is in use by a video card.
The Jumper Wire itself is nothing more than a thin insulated strand of copper wire such as the insulated strands inside telephone wiring (about 26 gauge). Make sure you retain the insulation so you do not short anything out. The motherboard used in the below example has very small holes to insert into which made it difficult to push in (most have much larger). It would of required thinner wiring than shown below.
First obtain and prepare the jumper wire. I suggest using telephone or cat 5 wiring strands since it is copper and pretty thin. Cut it to approximately 2 inch in legnth and remove a quater to a third inch of insulation from both ends of the wire.
Insert the stripped ends of the wire into the PCI-E 1X slot as shown below. Make sure you insert it far enough that most of the copper is not visible on the wire.
Please make sure it is exact or else you can damage the hardware!
Insert the PCI-E 1X cable into the slot and you are done. Verify the position of the cable - that it is not touching any capacitors or anything else since the hardware does get hot while running. Please note, the wire in the photo below is extruded a bit more outwards than it should have been. You should try to tuck it up against the cable to not impact other devices of fans of nearby video cards if not all are mounted on riser cables.