Dell Dell G491M M1000E Mellanox M3601Q 40Gb 32 Port Infiniband Sw — High-Performance Switch for HPC and Data Centers (Dell)

How Much Does Dell G491M M1000E Mellanox M3601Q 40GB 32 Port Infiniband Switch Cost in 2026?

As of July 2026, the Dell G491M M1000E Mellanox M3601Q 40Gb 32 Port Infiniband Switch is available in the used market at a price range of $43–$43, with an average of $43. This is a used, condition grade B unit, typically sourced from decommissioned data centers or HPC environments. Refurbishers like Ferrotec and Axus Technology commonly handle these switches, offering savings of 40–60% compared to new units, which can cost upwards of $100–$120.

The cost of failure is significant—downtime in a high-performance computing cluster can cost as much as $2,000–$5,000 per hour. Therefore, sourcing a reliable used unit is critical. However, it's important to note that condition grade B units may have limited warranty and require more frequent maintenance. Always verify the unit’s history and test results before purchase.

Dell G491M M1000E Mellanox M3601Q 40GB 32 Port Infiniband Switch Specifications and Compatible Tools

The Dell G491M M1000E Mellanox M3601Q 40Gb 32 Port Infiniband Switch is a high-density interconnect switch designed for high-performance computing and data center environments. It features 32 ports operating at 40 Gb/s, typically with a latency of under 100 microseconds. The switch is commonly used with systems like the Dell PowerEdge M620 and M630 blade servers, particularly those deployed between 2013 and 2017.

The typical lifecycle of this switch is around 5–7 years, with some units reaching 8–10 years in low-stress environments. It is not compatible with newer Mellanox ConnectX-6 or later adapters, particularly part number MCX4121A-ECAT. Failure of this switch can lead to complete network partitioning in a cluster, causing hours of downtime and potential data loss.

Always verify compatibility with your existing infrastructure and check the switch’s operational hours and maintenance logs.

What to Check Before Buying a Used Dell G491M M1000E Mellanox M3601Q 40GB 32 Port Infiniband Switch in 2026

1. Production Year: Units manufactured before 2014 are more likely to have higher wear and may require more frequent maintenance. Avoid units older than 10 years.

2. Port Functionality: Use a port tester or a live network test to verify that all 32 ports are active and operating at full 40 Gb/s speed. A single failed port can disrupt the entire cluster.

3. Firmware Version: Ensure the firmware is updated to at least version 2.10. Older versions may have unresolved bugs that can lead to packet loss or latency spikes.

4. Power Supply and Fans: Check for signs of overheating or failed fans. A failed fan can lead to thermal shutdown within 30 minutes under load.

5. Reject If: The unit has more than 30,000 operational hours or shows signs of physical damage. These units are at high risk of failure within 6–12 months of deployment.

Failure to inspect these aspects can result in a defective switch that costs $5,000–$10,000 in downtime and replacement.

FAQ

Q: Can I use the Dell G491M M1000E with a Mellanox ConnectX-5 adapter?
A: Yes, the Dell G491M M1000E is compatible with Mellanox ConnectX-5 adapters (e.g., part number MCX354A-ECAT). However, it is not compatible with ConnectX-6 or later models.

Q: Should I buy a used Dell G491M M1000E if it has 25,000 operational hours?
A: Yes, 25,000 hours is within acceptable limits for a used unit. However, ensure the unit has been recently serviced and passes a full port test. Units with over 30,000 hours are a hard reject.

Q: How long can I expect a used Dell G491M M1000E to last?
A: With proper maintenance, a used unit can last 3–5 years in a typical data center environment. Units with more than 25,000 hours may require more frequent checks.

Q: What’s the difference between the Dell G491M M1000E and the M1000F?
A: The M1000F is a 48-port variant, while the M1000E is a 32-port model. The M1000E is typically used in smaller clusters or as a top-of-rack switch. The M1000F is more common in large-scale HPC environments.

Q: Is it worth buying a used Dell G491M M1000E for a small lab setup?
A: Yes, for a small lab setup, a used unit can be a cost-effective solution. A $43 unit can save you up to 60% compared to a new one. Just ensure it passes a full diagnostic test before deployment.