How do I Choose a Riser?

Disclaimer: This material is provided for general informational purposes only and does not constitute legal, tax, financial, or investment advice. It does not contain an offer to acquire, sell, exchange, use, or accept digital currency, nor is it intended to promote goods, works, or services related to the circulation of digital currency. Applicable regulation and legal consequences depend on the specific circumstances, a person's status, jurisdiction, the nature of the transaction, and other factors. Before taking any action, consult a qualified professional and check the current requirements of applicable law.

Many crypto enthusiasts are still wondering what a riser is and why it's essential in the mining world when they stumble onto that term. Let's dive in. If you're curious about what a riser is, here's the answer: a riser is a device used in cryptocurrency mining on mining rigs. Its primary purpose is to connect multiple graphics cards to the motherboard simultaneously. Essentially, this device acts as an adapter for graphics cards in the mining world.

Before diving into how to properly use a riser, it's essential to find out carefully how to choose a riser. The GPU adapters' manufacturer and its appearance aren't the most critical factors to focus on initially. When choosing risers, the power connection type is a key consideration. There are several types: SATA, Molex, 6pin, as well as combined options.

For safe, stable mining, it's crucial to install and configure the riser correctly. Mishandling this device can easily lead to your graphics card burning out during the mining process.

Key Takeaways

• The riser's USB-style cable carries only the PCIe signal, not power — GPU power comes solely through the riser's separate SATA/Molex/6-pin connector, wired directly to the PSU
• There's no fixed universal limit on how many risers you can run — it depends on your motherboard's supported configuration and your PSU capacity, not a flat "2 devices" rule
• BIOS tweaks for riser stability (PCIe link speed, disabling unused devices) vary by motherboard model — always check your board's manual rather than following a generic checklist
• Running two power supplies safely requires a sync adapter (e.g. add2psu) and keeping each riser + the GPU it powers on the same PSU — never split one GPU's power across two units
• SATA-power risers carry the highest fire risk of the connector types due to their low current rating — prefer 6-pin or Molex where possible

What's a Riser?

Beginner miners spend a lot of time online trying to figure out how to choose the right riser for a graphics card and what it actually is.

A riser is an adapter that connects the graphics card slot to the motherboard slot. The device consists of a cable with mounting holes. Risers are mostly used as extenders for mining coins with graphics cards.

A motherboard typically has several PCIe slots located close to each other, which prevents the connection of two or more graphics cards. In this case, the remaining slots will remain empty.

A riser consists of the following main components:

• PCIe x1 card: connects to the PCIe slot on the motherboard
• Full-size PCIe slot: it's where the graphics card is installed

USB-style cable: carries the PCIe data signal between the motherboard and the graphics card slot. It does not deliver power to the GPU — power comes separately through the riser's SATA, Molex, or 6-pin connector, wired directly to the power supply.

A GPU's total power draw (commonly 120-450W depending on model) is a separate figure from what a single riser connector is rated to carry: a SATA connector is typically rated around 54W (4.5A at 12V), a Molex connector around 132W (11A), and a 6-pin PCIe connector around 75W. If a card's actual draw exceeds one connector's rated capacity, the fix is distributing the load across multiple properly-rated connectors — not assuming any single adapter can handle it.

If you're curious about why a riser is needed for graphics cards, it's worth noting that this device allows multiple graphics cards to be connected for profitable cryptocurrency mining. The riser, to some extent, positively affects your graphics card's lifespan since proper installation and setup are key to ensuring even the device's cooling.

An obvious riser advantage is its low cost. Typically, this device's price doesn't exceed 20$ on marketplaces.

Riser Types

SATA, Molex, and 6pin are standard connectors on risers. They serve as connectors for ATX power supplies, which are used for mining. Graphics card adapters are typically supplied with multiple connectors.

When choosing a riser for a graphics card, it's important to consider the following key conditions:

• The contacts on the connectors should be in good condition
• Thick, shielded USB cables
• High-quality electronic components soldering
• The presence of radio components that match the specific circuit
• High-quality electrolytic capacitors with large capacitance
• The voltages supplied to the graphics card should meet PCIe standards
• Complete isolation of the power circuits for the graphics card and motherboard: especially important if multiple power supplies are used in one rig
• A fuse to protect the riser from short circuits

Molex

Molex adapters come with four large connectors:

• Two black connectors: negative
• One yellow connector: positive
• One red connector: positive

Keep in mind that when using this power supply type, the maximum device power will be lower. This is due to the fact that Molex risers use fewer 12V wires.

It's impossible to find the perfect power type for a riser, but with proper maintenance, the device's lifespan can be extended. It's important to prevent overheating, avoid connector burnout, and regularly inspect them.

SATA

The SATA power type is considered the lowest quality among all the others.

If you're looking for a riser to connect a graphics card and are considering a SATA adapter, it's worth looking through this type's drawbacks:

• Thin connectors: designed for small currents
• Small connector sizes
• SATA comes with 15 contacts and 3 power voltages: 12V, 5V, 3.3V
• The limited surface area where the wires connect to the connectors

Using a SATA riser for mining can cause a fire. This is because poor-quality contacts can result in burnt connections, increasing resistance. This, in turn, reduces the voltage and causes the connector to overheat, potentially leading to a short circuit. This is a documented risk specifically with molded SATA-to-6-pin adapters, which are commonly rated below the current a GPU actually draws — avoid stacking more than one such adapter per power cable, and prefer a proper 6-pin or Molex connection where possible.

6pin

The 6-pin riser is an optimal choice for mining with graphics cards.

The contact overheating probability is significantly reduced due to the following factors:

• Thick contacts
• Three 12V wires – yellow and one negative wire – black
• Presence of fuses: protecting against damage and short circuits

The process of connecting a riser with this power type is relatively simple and safe. 6pin adapters are capable of supporting long-term and profitable mining.

Combined 6pin/SATA/Molex Models

If you're wondering which riser to choose for mining, adapters with a combined power type are the best option.

However, you should keep in mind that connecting multiple connectors simultaneously can cause some inconvenience. The main combined adapter advantage is the presence of LEDs for voltage monitoring.

Installing and Setting up the Riser

If you already know what risers are for, it's time to move on to the next step – installation and setup. The following actions must be taken for proper riser use in mining:

Power distribution

The first thing you need to do before connecting the riser is to check its key components:

• Power supply
• Contacts

It's also important not to connect a graphics card that is used for other tasks since mining should be your priority.

When distributing power, the following factors should be considered:

The power supplies' number depends on the graphics cards' number and their total power draw, not on a fixed rule of thumb.

• The connection method depends on the chosen riser's power type. For example, with a Molex adapter, two graphics cards can be connected to a single power supply

For a server power supply used as an example, an additional 350 W power supply is one common approach — but the exact PSU size should be sized to your actual GPU count and per-card draw, not copied as a fixed number. Keep in mind that only the graphics card should be connected to this power supply through 12V wires, and the 6pin riser should be used.

Connecting the riser

To ensure the device works successfully, follow these steps:

• Connect one riser's end to the graphics card and the other end to the PCIe slot on the motherboard
• Power on the rig
• Verify that all devices are connected to the motherboard

Then, you may want to adjust a few BIOS settings to improve stability with multiple risers — but the exact options and their names vary significantly between motherboard models and BIOS versions. Common adjustments miners make include disabling unused onboard devices (integrated audio, unused USB controllers), setting the PCIe link speed down from Gen3 to Gen1 or Gen2 for signal stability over long riser cables, and adjusting fan curves. Always check your specific motherboard's manual or manufacturer's mining guide before changing these settings, since disabling the wrong device or interface can cause boot failures on some boards.

It's also worth considering a stabilizer for your riser. It'll help simplify the connection process. For example, with a stabilizer, you can convert 5V into 3.3V on the device.

However, many users take full advantage of this feature and apply the maximum voltage. This, in turn, accelerates the device's wear and tear, which in these cases may not last more than a few days.

Riser's Power Consumption

It's generally believed that graphics cards' risers have a low power consumption compared to graphics cards, computers, and other mining devices.

The riser's power consumption depends on the following factors:

• Riser's type
• Graphics card
• Mining settings

It's worth noting that the graphics card power consumption depends on its model and the riser settings. In some cases, the power consumption level can reach several hundred W.

When choosing a riser, you should consider the power consumption of the entire mining rig, which main components include the graphics card, processor, memory, and other equally important elements.

Experts recommend choosing energy-efficient devices for mining digital coins and continuously monitoring the overall power consumption. Neglecting these recommendations may result in exceeding the power supply's allowable capacity.

Keep in mind that energy consumption primarily depends on the device's operating conditions and the mining settings.

For efficient use of a riser, start by reviewing the technical specifications and user manual for the specific adapter and graphics card model.

Before purchasing a riser, it's crucial to understand why a riser is needed for a graphics card and its key features.

For pool-connected rigs, operational monitoring can complement hardware-level checks. EMCD Mining Pool provides 24/7 hashrate and worker monitoring, which can help miners identify changes in mining performance or unexpected downtime.

FAQ

How many risers can be connected to the motherboard?

There's no fixed universal number — it depends on how many PCIe slots (or slot-equivalent headers) your motherboard supports for mining, and whether your power supply and case airflow can handle the total load. Mining-specific motherboards commonly support anywhere from 6 to 19+ GPUs; consult your specific motherboard's manual for its supported configuration.

Is it necessary to check the devices before starting up?

Performing an additional check on the riser is always a good idea since it helps reduce the malfunction risk and avoid unnecessary expenses.

Is it acceptable to place risers on a metal surface?

It's not advisable to place devices on a metal surface since the backing may deform, which could potentially lead to a short circuit in the future.

Is it possible to use a USB 2.0 cable?

It's best to use the USB 3.0 cable that comes with the riser. The cable itself doesn't carry power to the GPU — it only carries the PCIe signal — but USB 3.0's shielding and build quality provide more stable signal transmission than USB 2.0 over the cable lengths typically used in mining rigs.

Is it okay to buy risers from China?

Risers can be purchased from marketplaces like AliExpress and Taobao. While the price will be lower, warranty support will typically not be available for devices from these sources.

Disclaimer: This material is provided for general informational purposes only and does not constitute legal, tax, financial, or investment advice. It does not contain an offer to acquire, sell, exchange, use, or accept digital currency, nor is it intended to promote goods, works, or services related to the circulation of digital currency. Applicable regulation and legal consequences depend on the specific circumstances, a person's status, jurisdiction, the nature of the transaction, and other factors. Before taking any action, consult a qualified professional and check the current requirements of applicable law.