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Dell PERC H745 vs Dell PERC H755: What’s Best for Your PowerEdge Server?

  • Writer: server-parts.eu server-parts.eu
    server-parts.eu server-parts.eu
  • Aug 9
  • 3 min read

Updated: Aug 19

The Dell PERC H745 and Dell PERC H755 are both RAID controllers used in PowerEdge servers. They serve similar use cases—enterprise storage environments—but differ notably in drive type support and throughput.


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✔️ No Upfront Payment Required - Test First, Pay Later!


They’re compared here to help Dell PowerEdge server users choose the right fit for their workload and compatibility needs.


Dell PERC H755 745 Controller with price details, technical specifications, model comparison, and server compatibility from server-parts.eu refurbished inventory.


Specs Comparison - Dell PERC H745 vs Dell PERC H755

Feature

PERC H745

PERC H755

Series

PERC 10 (14G/15G servers)

PERC 11 (15G/16G servers)

Supported Drives

SAS, SATA only

SAS, SATA, NVMe (depending on backplane)

PCIe Interface

Likely Gen3/Gen4

PCIe Gen 4

Cache Memory

—

8 GB DDR4 NV-cache

RAID Levels

Standard RAID levels

0, 1, 5, 6, 10, 50, 60

Max Drives Supported

—

Up to 16 drives (expandable via SAS expander)



Performance Differences - Dell PERC H745 vs Dell PERC H755


  • Throughput: Dell PERC H755 uses PCIe Gen 4, offering higher data throughput than the older standard—ideal for NVMe workloads.


  • Cache & Handling: Dell PERC H755 features 8 GB of non-volatile cache which boosts write performance and protects against data loss. H745 lacks this feature.


  • Thermal/Power Impact: Newer controller, Dell PERC H755, may use more power and require proper cooling, particularly in dense NVMe configurations. Still, its performance advantages are significant.



Compatibility Notes - Dell PERC H745 vs Dell PERC H755


  • Server Generations:

    • Dell PERC H745 fits in 14G/15G PowerEdge servers.

    • Dell PERC H755 is intended for 15G/16G servers.


  • Drive Support:

    • Dell PERC H755 supports NVMe storage when paired with the correct backplane. Dell PERC H745 does not support NVMe.


  • Migration Path:

    • Virtual disk migration is supported to PERC 11 controllers (Dell PERC H755 series) from Dell PERC H745, but not the other way around.


Firmware updates may be required for proper NVMe or expander functionality.



Price & Availability in EU - Dell PERC H745 vs Dell PERC H755


  • Dell PERC H755

    • New: Typically €1,500, depending on configuration and supplier.

    • Refurbished: Around €600 from EU-based resellers.


  • Dell PERC H745

    • New: Less common in the market, but usually €700 when available.

    • Refurbished: Generally €400 from EU-based suppliers.



Recommendations - Dell PERC H745 vs Dell PERC H755


  • Choose Dell PERC H745 if:

    • Your server is older (14G/early 15G) and only requires SAS/SATA support.

    • Budget is tight and NVMe is not needed.


  • Choose Dell PERC H755 if:

    • You use NVMe or anticipate workflows that benefit from higher throughput and cache.

    • You're deploying in 15G/16G servers and want future-proof hardware.

    • Fast rebuilds and higher disk I/O are required (cache helps here).



Conclusion - Dell PERC H745 vs Dell PERC H755


Both controllers serve enterprise RAID needs. Dell PERC H745 handles legacy SAS/SATA workloads effectively. Dell PERC H755 brings generational improvements—PCIe Gen 4, NVMe support, and onboard cache—that matter in modern storage setups. For upgrades or new deployments, Dell PERC H755 is likely the better long-term choice.



Dell PERC Controllers: Save Up to 80%

✔️ No Upfront Payment Required - Test First, Pay Later!



Sources - Dell PERC H745 vs Dell PERC H755


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