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The “complete solid-state storage system” in the 2009 headline was the DDRdrive X1, a PCI Express card built to accelerate demanding storage workloads. It combined DRAM, NAND flash and an FPGA controller, with supercapacitor-backed protection intended to preserve data in volatile memory when host power failed. Its focus was fast, latency-sensitive I/O—not high-capacity general-purpose storage.
What was the DDRdrive X1 PCIe card?
EE Times reported on May 5, 2009, that DDRdrive LLC had introduced the X1 as a PCI Express expansion card containing a solid-state storage system. The card was intended to speed I/O-intensive applications, particularly ZFS Intent Log (ZIL) operations. EE Times’ 2009 report describes its custom, field-upgradable IOPS engine as an FPGA-based storage accelerator and identifies an Altera Cyclone II EP2C35 FPGA as its controller.
DDRdrive’s architecture combined equal-capacity DRAM and NAND in a device designed to act as both a host-bus adapter and an SSD. The vendor described a direct storage stack intended to reduce controller and protocol overhead. DDRdrive’s architecture description presents the card as a synthesis of DRAM and NAND rather than a conventional single-medium drive.
How did the card combine DRAM and NAND?
DRAM offered a fast working store for operations where low latency mattered. Unlike NAND flash, however, DRAM is volatile: it normally loses its contents when power is removed. The X1 paired DRAM with NAND and used a supercapacitor-backed power design. If host power was lost, the design was intended to provide enough reserve power to copy volatile DRAM data to NAND, then restore it later. This is the basis for the vendor’s claim that the system could protect data held in DRAM; it is not a guarantee against every possible hardware failure.
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The 2014 product brief specifies 4GB of DRAM and 4GB of SLC NAND, as well as complete backup and restore in up to 60 seconds. Those are vendor-published specifications, not independent test results. The DDRdrive product brief also lists PCI Express x1, x4, x8 and x16 compatibility.
Was the DDRdrive X1 an SSD or a RAM disk?
It was not simply a RAM disk: it included NAND flash and a power-loss design intended to save DRAM contents to that nonvolatile storage. Nor was it a typical SSD built around flash as its sole storage medium. DDRdrive presented the X1 as a combined DRAM/NAND storage accelerator with an FPGA controller and a direct storage stack. “PCIe storage accelerator” is the clearest short description; the vendor also characterized it as a combined host-bus adapter and SSD.
Rank #2
- NVMe M-KEY DRIVES ONLY, NOT SATA: This card takes M.2 M-key NVMe SSDs in the 2230, 2242, 2260 and 2280 lengths, plus older B+M key PCIe (AHCI/NVMe) drives. It does NOT support SATA M.2 drives — if your drive says SATA on the label, it will not work here. Your motherboard also has to be NVMe-capable to boot or see the drive.
- GEN5 SPEED COMES FROM YOUR SLOT: The card connects at x4 and supports up to PCIe 5.0, for up to 16GBps bidirectional when the host slot is Gen5. In a Gen4 or Gen3 slot it runs at that slot's speed, not Gen5 — the card cannot add a generation your motherboard doesn't have. Check your slot generation before you buy if Gen5 throughput is the goal.
- ONE DRIVE, x16 CONNECTOR, NO BIFURCATION NEEDED: This is a single M.2 card with an x16 physical edge for stability, and it may fit some x4/x8 slots. Because it uses one drive it does not need motherboard bifurcation support. Confirm you have a free full-length PCIe slot and clearance around it — a tall CPU cooler, GPU or fan sitting over the slot can block the card.
- TOOL-FREE INSTALL, NO SCREWS: Drop the SSD in and lock it down without hunting for a tiny M.2 screw or a screwdriver. Nothing to lose, nothing to strip, and the drive comes back out just as fast when you want to move it to another machine.
- COOL AND QUIET, NO FAN: A built-in aluminum heatsink and thermal padding keep the SSD's temperature down under sustained load with no active cooling, so there is no extra fan noise in the case. It is SABRENT — register your product on the manufacturer's website for technical support.
What performance did DDRdrive claim?
The 2014 DDRdrive brief published the following benchmark figures. They are vendor claims; the brief’s numbers should not be treated as independently verified or directly compared with modern products unless test conditions and methodology match. DDRdrive’s 2014 product brief is the source for all figures in the table.
| Workload | Vendor-published result |
|---|---|
| 512-byte random writes | 200,000+ IOPS |
| 512-byte random reads | 300,000+ IOPS |
| 4KB random writes | 44,000+ IOPS |
| 4KB random reads | 50,000+ IOPS |
| Sustained sequential writes | 155+ MB/s |
| Sustained sequential reads | 215+ MB/s |
The product’s positioning helps explain the unusual mix of figures: it targeted high IOPS and latency-sensitive operations such as ZIL acceleration, rather than bulk sequential throughput or large storage capacity.
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Rank #3
- Adapted server-grade PCB supports up to four PCIe 5.0/4.0 M.2 drives, with up to 512 Gbps bandwidth for smooth data transfers
- 1 x 6-pin PCIe Power connector and Two-phase power solution up to 14-watt output support the latest NVMe drives
- Large heatsink, top and bottom thermal pad, and active fan reduces M.2 SSD temperatures for unthrottled transfer speeds and enhanced reliability, extra fan cable support fan control from MB chassis fan header
- Support Raid functions across different platforms to create a bootable RAID array with up to four M.2 SSDs.
Which operating systems did the X1 support?
The 2014 product brief lists support for OmniOS, Oracle Solaris 11, Syneto Storage OS, Nexenta NexentaStor 3.0–4.0, and OpenIndiana/OpenSolaris variants. These are historical compatibility claims, not confirmation that the card works with current releases. Anyone considering a used card would need to verify driver availability and compatibility with the exact operating-system version, motherboard and storage configuration.
Is the DDRdrive X1 still available?
Current manufacturing status, inventory and active sales channels have not been established. A 2014 brief listed a suggested retail price of $1,995 for the 4GB DRAM/4GB NAND package and a five-year limited warranty, but those are historical terms—not a current price or an assurance that warranty coverage remains available. The dated vendor brief is the basis for those figures.
Rank #4
- RIITOP Quad PCIe NVMe Adapter allows you add 4x NVMe SSDs simultaneously via available PCI-e 4.0 or 3.0 x16 Slot on Motherboard which supports PCIe x16 Bifurcation. Full-speed transmission up to 4x 32Gbps
- Hardware requirement: 1. There is available PCI-e 4.0 or 3.0 x16 Slot on Mobo 2. The motherboard can support PCIe x16 Bifurcation itself, and can be set as"PCI-e x4x4x4x4" in BIOS 3. All of the SSDs are M.2 PCI-e (M Key) NVMe SSD 4. CPU has enough channels to support
- Upgraded Design: Designed with 0.32inch Heatsink, it will avoid SSDs working at low speed due to high Temperature, but it will not take up more space from other PCIe slots; And individual LED Indicator design will show each SSD's Working Status Compatible with M.2 PCI-e NVMe SSDs in all sizes:80x22mm, 60x22mm and 42x22mm, 30x22mm; Not support any M.2 (SATA-Based B+M Key) SSD; Motherboard Compatibility: Most Server and X299, X399 can support PCIe x16 Bifurcation
- Compatible with M.2 PCI-e NVMe SSDs in all sizes:80x22mm, 60x22mm and 42x22mm, 30x22mm; Not support any M.2 (SATA-Based B+M Key) SSD; Motherboard Compatibility: Most Server and X299, X399 can support PCIe x16 Bifurcation
- Please note: RIITOP 4x NVMe PCIe Adapter does not Support Hardware Raid, only supports the formation of soft raid in Win10 , or you may build raid via Third-party Software, and 4 SSDs should be same model 2. The motherboard need support "PCIEX16 Bifurcation", Otherwise, only one M.2 SSD can be recognized. Please check Motherboard's user manual on its official website if you are not sure the Mobo can support
What can replace this kind of storage accelerator?
There is no verified current product that can be called a direct DDRdrive X1 replacement. For a similar general purpose, start by looking at the category of PCIe SSD expansion cards, then check whether a candidate actually fits the workload and platform. A modern NVMe SSD card may provide far more capacity or throughput, but that alone does not establish equivalent latency, power-loss behavior or ZFS Intent Log suitability.
- Interface and protocol: Check PCIe generation and lane width, and whether the card uses NVMe or another protocol your system supports.
- Workload performance: Compare random I/O at matching block sizes and queue conditions, rather than relying on headline IOPS or sequential throughput alone.
- Data protection: Confirm whether power-loss protection covers volatile write cache and what mechanism protects data during a power failure.
- Platform fit: Verify operating-system driver support, boot support if needed, and physical card height, length and cooling requirements.
- Ownership costs: Check usable capacity, endurance, warranty and current price for the exact model and region.
These checks matter especially for ZIL use: a card that is fast in a general benchmark is not automatically a suitable or safe ZIL device. The X1’s historical benchmark figures cannot establish how it would compare with a current card under a matched test.
Quick Recap
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- NVMe PCIe Adapter Apply to 2280/2260/2242/2230mm M.2 NVMe and AHCI SSD, Adapter with Aluminum Heatsink Solution.
- M.2 PCIe Adapter Supports PCI-Express X4, X8, X16 slots. PCIe 4.0 lanes with up to 64Gbps bandwidth, backward compatible with PCIe 1.0 2.0 3.0, Full release the speed of PCIE 3.0/4.0 X4 Full Speed M.2 PCIe SSD, such as 64Gbps M.2 PCIe 4.0 SSD.
- PCIe NVMe Adapter Supports Windows 11/10/8、Windows Server 2012 R2、Linux、Fedora、SUSE、Ubuntu、Red Hat（no driver required） NOTE: Go to NVMe SSD manufacture website for driver installation if your PC can not recognize NVMe SSD. Win7 and Windows Server 2008 R2 need additional driver for NVMe SSD.
- PCIe NVMe 3.0/4.0 x4 Adapter with 2 thermal pads, You put one between the ssd and the carrier and one between the ssd and the heat sink.
- Package Including: ➤1-M.2 PCIe Adapter x1.➤2-SSD Spare bolt（Pre-installed on PCB）.➤3-Low Profile Bracket x1.➤4-Screw Driver x1.➤5-Regular Profile Bracket x1.➤6-Heat conducting silica gel pad x2 （thick + thin）.➤7-Aluminum Heatsink x1.➤8-Heatsink fixing spring nails x2.➤9-PCB fixing screws x2.➤10-Bracket fixing screws x1.
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