Dell PowerEdge 350 Upgrade Guide: RAM and Storage Options

Updated Oct. 9, 2026 · Written from this device's verified specifications

This guide covers upgrading the original early-2000s 1U Dell PowerEdge 350 (Celeron or Pentium III), not the modern T350 or R350. The short answer: it takes up to 1 GB of PC100 SDRAM and two old-style IDE hard drives. It has no SATA, M.2 or NVMe.

At a glance

  • RAM: 4 sockets of 168-pin PC100 SDRAM (not DDR), up to 1 GB total, 128 MB minimum.
  • Storage: two 1-inch-high parallel IDE (ATA-100) drive bays, with no SATA, SAS, NVMe or M.2.
  • CPU: single processor; Dell lists a 600 MHz or faster Celeron or a 750 MHz or faster Pentium III.
  • Dell's documents disagree on ECC versus registered memory and on the largest module size, so check before buying.
  • The PowerEdge T350 and R350 are unrelated modern servers; their parts will not fit.
168-pin SDRAM DIMM4 × DIMM · up to 1 GB total · 100 MT/s
1-inch-high IDE (ATA-100) hard drive bay2 × HDD 3.5"
4 × DIMMup to 1 GB total1-inch-high IDE (ATA-100) hard drive bay2 × HDD 3.5"
Schematic of the upgradeable slots (not to scale). Check the owner's manual for their exact positions.

Lifecycle and support

No new BIOS, firmware or driver releases are planned, so a newer CPU may not be recognised.

20012003200520072009201120132015201720192021202320252027Today11 · Release · 200122 · EOL · May 27, 2010
Filled dots: dates published by the manufacturer. Hollow dots: estimates from third-party sources.
MilestoneDate
Release
First available to buy.		 2001 Estimate Not a confirmed launch date. The service manual says 'Initial release: 9 Feb 2001', which is the manual's publication date, so early 2001 is only a rough indicator.
Source ↗
End of life (EOL)
The manufacturer stops developing the product: no new BIOS, firmware or driver releases.		 May 27, 2010 Estimate Third-party Dataknox lists 'May 27, 2010' and 'Date not published'. The labeling is ambiguous, and the order suggests this is the EOL date, but that is unverified.
Source ↗

Dates not listed haven't been published by the manufacturer or a reliable third party.

RAM: up to 1 GB of PC100 SDRAM

The PowerEdge 350 has four full-size 168-pin DIMM sockets, labeled DIMM3 to DIMM0. The memory is plain SDRAM, not DDR, and laptop-style SO-DIMMs will not fit. Modules need to be rated for 100 MHz (PC100) operation or faster. The minimum is 128 MB and the maximum is 1 GB in total, which is four 256 MB modules. Memory beyond 1 GB will not be recognized.

Dell's manuals disagree on a few points. The service manual lists 128, 256 and 512 MB modules, while the user manual lists only 128 or 256 MB. The service manual's table of working configurations only goes up to 4 x 256 MB, so a 512 MB module is unconfirmed in practice. Treat 256 MB as the safe maximum per module.

They also disagree on the memory type. The service manual says ECC unbuffered, while the user manual mentions both unbuffered and registered. One memory reseller says to use ECC modules and not to mix registered with unbuffered. ECC unbuffered PC100 is the safest match to the more detailed service manual, but confirm before you order.

On filling the sockets, Dell's service manual says to fill DIMM3 first (the socket toward the board center), then DIMM2, DIMM1 and DIMM0, installing larger modules first, and that modules do not need to be installed in pairs. A reseller says the sockets work as two banks of two and should be filled with matching pairs. Matching pairs is a harmless way to play it safe, and the manual's memory section is the place to settle it.

Buying tips

  • Buy 168-pin PC100 (or faster) SDRAM DIMMs, not DDR and not SO-DIMM.
  • Choose ECC unbuffered unless your own manual clearly calls for registered, and never mix registered with unbuffered.
  • Don't buy more than 1 GB in total; the extra won't be used.
  • Stick to 256 MB or smaller modules, because 512 MB modules are not confirmed to work.
  • If in doubt, buy matched pairs of the same size and type.

Storage: IDE hard drives only

The server has two 1-inch-high bays for parallel IDE (ATA-100) hard drives. There is no SATA, SAS, NVMe or M.2 connection, so a modern SSD is not a direct fit. Dell calls them 1-inch-high drives without stating the size outright; 3.5-inch is the likely form factor, but that is our reading rather than Dell's wording.

Dell's documents list 10, 20 or 40 GB drives, and the specifications table says 10 GB to 20 GB and higher. No maximum capacity is stated. Very old BIOS and IDE controllers may not handle large modern drives. That is a caution rather than a confirmed limit, so test a larger drive before relying on it.

The server also has a 1.44 MB diskette drive and an IDE CD-ROM drive as standard. It has one open full-length PCI slot if you want to add a card; the low-profile slot is taken by the video card, whose 8 MB of video memory cannot be upgraded.

Buying tips

  • Look for a parallel IDE (ATA-100) drive; check the connector, because SATA drives will not plug in.
  • Check that the drive is a 1-inch-high model that fits the bay.
  • Moderate capacities are the safest; large drives may not be recognized by the old BIOS.
  • Keep your return options open when buying a larger drive in case the BIOS cannot see all of it.

Cheapest compatible right now

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How to upgrade

Before you start

  • Make sure you have the original PowerEdge 350 (1U, Celeron or Pentium III), not a T350 or R350.
  • Back up anything important on the existing drives.
  • Check your owner's manual for the memory section and the exact way to open the case.
  • Have an anti-static wrist strap or a bare metal surface to touch, and a safe place for screws.
  • Decide whether your modules need to be ECC unbuffered or registered before buying.

Steps

  1. Back up your data
    Copy anything you care about to another machine or disk, especially before changing or adding hard drives.
  2. Power off and unplug
    Shut the server down properly, switch it off and remove the power cable and any other cables.
  3. Ground yourself
    Wear an anti-static strap or touch bare metal on the chassis before handling parts. Hold DIMMs and cards by their edges.
  4. Open the case
    Follow the owner's manual for the exact way to remove the cover.
  5. Install the part
    For memory, fill DIMM3 first, then DIMM2, DIMM1 and DIMM0, with larger modules first. For a hard drive, use one of the two IDE bays. For a processor, Dell says it can be replaced without removing the system board. Follow the manual for each of these.
  6. Close up
    Refit the cover. Fill any empty expansion slot with a metal filler bracket, which Dell says keeps airflow right and the unit within its FCC certification.
  7. Check that the system sees it
    Reconnect power, start the server and check that the BIOS or startup screen shows the new memory, drive or processor. If it does not, power down and recheck the seating and the part type.

Good to know

  • This guide is for the early-2000s PowerEdge 350. The modern PowerEdge T350 and R350 use DDR4 memory and different drives, and none of their specs apply here.
  • Dell's manuals disagree on ECC versus registered memory and on whether 512 MB modules are supported, so confirm against your own manual before buying memory.
  • Dell gives no maximum hard drive size; the warning about very large drives is a caution, not a confirmed limit.
  • The 3.5-inch drive size is our reading of Dell's 1-inch-high wording, not a stated dimension.
  • Dell's documents don't name the CPU socket or a power limit. Socket 370 is the likely answer but is unconfirmed, so check the manual before buying a processor.

Frequently asked questions

How much RAM can the Dell PowerEdge 350 take?

Up to 1 GB in total, using four 256 MB modules. The minimum is 128 MB, and memory above 1 GB will not be recognized.

What type of RAM does the PowerEdge 350 use?

168-pin PC100 SDRAM DIMMs, not DDR. Dell's service manual says ECC unbuffered, but the user manual mentions both unbuffered and registered. Never mix the two types.

Can I install a 512 MB memory module?

It is unconfirmed. Dell's service manual text mentions 512 MB modules, but the user manual lists only 128 and 256 MB, and the service manual's table of working configurations shows no 512 MB module in use. Stick to 256 MB or smaller.

Does the PowerEdge 350 support SATA drives or an SSD?

Not directly. The drive bays are parallel IDE (ATA-100) only, with no SATA, SAS, NVMe or M.2.

What is the biggest hard drive it will take?

Dell gives no maximum. Its documents list 10, 20 and 40 GB drives and say 10 GB to 20 GB and higher. Older BIOS versions may not handle very large drives, so test before relying on one.

Can I upgrade the CPU in a PowerEdge 350?

Yes, it has a single replaceable processor. Dell lists a Celeron at 600 MHz or faster or a Pentium III at 750 MHz or faster. One Dell document mentions an 850 MHz or faster Pentium or a 700 MHz or faster Celeron, which may mean later revisions. Dell's documents don't name the socket (it is probably Socket 370, but that is unconfirmed) or a power limit, so check your manual before buying a chip.

Official documents and references

This guide was written with AI assistance from the compatibility data PartsPrices verified against the manufacturer's documents. Always check your exact model and the owner's manual before buying or opening your computer.