Dell Dell Poweredge M640 S140 Blade Chassis — High-Density Server Housing for Data Centers (Dell)

How Much Does Dell PowerEdge M640 S140 Blade Chassis Cost in 2026?

As of July 2026, the Dell PowerEdge M640 S140 Blade Chassis is priced at $343 for a used, refurbished unit in condition grade B. This represents a 40–60% savings compared to the original manufacturer’s price, which typically exceeds $800 for a new unit. Refurbished units are commonly available through vendors like Axus Technology and Covalent Materials, both of which offer certified refurbished Dell server components with a 12-month warranty.

The price remains stable across most condition tiers, with a typical range of $343–$343 due to the part’s age and limited production since 2018. However, units with higher condition grades (A or A+) may command up to $50 more, depending on the vendor and included accessories.

Purchasing a faulty or poorly refurbished chassis can result in downtime costs of $2,000–$5,000 per incident, especially in mission-critical environments. Therefore, it’s crucial to verify the unit’s service history and test logs. A chassis that has operated for over 100,000 hours or shows signs of overheating should be inspected closely before purchase.

Dell PowerEdge M640 S140 Blade Chassis Specifications and Compatible Tools

The Dell PowerEdge M640 S140 Blade Chassis is a 14U rackmount chassis designed to house up to 14 blade servers, typically the PowerEdge M640 model. It supports dual redundant power supplies and offers up to 1440W of power capacity. The chassis is typically rated for a maximum ambient temperature of 35°C and is commonly used in data centers with high compute density needs.

The unit was in production from 2018 to 2021 and is compatible with Dell’s 13G and 14G blade server tools, including the Dell PowerEdge M640 blade server. It is not compatible with the newer M1000e chassis or blade models like the M640e due to differences in power and cooling architecture. Attempting to use incompatible blades can lead to overheating and potential hardware failure, costing upwards of $3,000 in repairs and downtime.

Verify with the seller that the chassis has not exceeded 100,000 RF hours and that all internal fans and power supplies are functioning. These components are critical to maintaining blade server performance and longevity.

What to Check Before Buying a Used Dell PowerEdge M640 S140 Blade Chassis in 2026

1. Service History and Age: Ensure the unit has not been in continuous operation for more than 7 years. Units older than 2019 should be inspected for wear on internal components like fans and power supplies.

2. Power Supply Health: Test both power supplies using a Dell-certified power tester. A failed power supply can prevent the chassis from booting and may damage blades, resulting in $1,500–$2,500 in replacement costs.

3. Fan Functionality: Run a full fan diagnostic using Dell OpenManage. If more than one fan is nonfunctional, reject the unit. Fan failure can lead to thermal shutdowns and blade server damage.

4. Blade Slot Integrity: Visually inspect each blade slot for wear or deformation. Slots that are misaligned or damaged may prevent blades from seating properly, risking data corruption and hardware failure.

5. Thermal Management: Use a thermal imaging camera to check for hotspots. A chassis with uneven cooling may indicate a failed fan or airflow obstruction, which can lead to blade overheating and downtime.

Reject any unit that has exceeded 100,000 RF hours or shows signs of water damage. A poorly maintained chassis can cost upwards of $4,000 in lost productivity and repairs.

FAQ

Q: Can I use the Dell PowerEdge M640 S140 Blade Chassis with newer blade servers like the M640e?
A: No. The M640 S140 chassis is not compatible with the M640e blade server due to differences in power and cooling requirements. Attempting to use them together can lead to overheating and blade failure.

Q: Should I buy a used Dell PowerEdge M640 S140 Blade Chassis in 2026?
A: Yes, if the unit is under 7 years old and has less than 100,000 RF hours. Refurbished units from 2019 or later are typically more reliable and cost 40–60% less than new models.

Q: How long can I expect the chassis to last with regular maintenance?
A: With proper maintenance, including annual fan and power supply checks, the chassis can last up to 8–10 years. Units over 10 years old are more prone to failure and should be replaced.

Q: What is the difference between the M640 S140 and the M1000e chassis?
A: The M1000e is a newer chassis introduced in 2020, supporting more advanced blade models and higher power capacity. The S140 is older and lacks support for newer blade servers and networking features.

Q: How much does it cost to replace a failed chassis in a data center?
A: Replacing a failed chassis can cost between $5,000 and $10,000, including downtime, blade server reinstallation, and labor. This is why sourcing a reliable used chassis is often more cost-effective.