SSD Controller Technical Reference
Samsung Pascal Controller Controller Reference
Samsung's Pascal is an 8nm, 8-channel NVMe Gen4 controller used in the 990 PRO. PC-3000 firmware-level FTL rebuilding is not available for Pascal. If the drive still enumerates, PC-3000 can force PCIe Gen1x1 speeds to stabilize the connection for extraction. If the controller is dead, recovery requires component-level voltage rail probing and PMIC microsoldering. ACELab's PC-3000 SSD supported-controller list does not currently cover this controller. For context on the SSDs we do recover, see our SSD data recovery page.
Samsung Pascal Controller is not on the current PC-3000 SSD supported-controller list
Samsung Pascal Controller does not appear on the current ACELab PC-3000 SSD supported-controller list (PC-3000 SSD / PC-3000 SSD Extended 3.8.10) as of 2026-05-12. Case-by-case feasibility only. Contact us before shipping anything and we will tell you in writing whether we can do anything for your specific drive.
Source of truth: ACELab PC-3000 SSD supported-drives list. Internal evidence file: src/lib/ssd-support-matrix.ts.
Samsung Pascal Controller Specifications
| Manufacturer | Samsung |
| Interface | NVMe Gen4 |
| NAND Types | 3D TLC |
| DRAM Cache | Yes |
| Channels | 8 |
| PC-3000 Support | Limited / Generic NVMe |
| Chip-Off Viability | Not viable (AES-256 hardware encryption) |
PC-3000 developing support. 8nm controller. The 990 EVO uses a different controller (Piccolo) and is not covered here.
Affected SSD Models
The Samsung Pascal Controller is deployed in the following consumer drives. A failure in this controller impacts access to the NAND flash on these specific models.
| # | Drive Model | Interface |
|---|---|---|
| 1 | Samsung 990 PRO | NVMe Gen4 |
Common Failure Modes and Symptoms
Each failure mode below describes a specific way the Samsung Pascal Controller fails and the symptoms you will observe. If your SSD matches any of these patterns, do not run recovery software; it cannot communicate with a dead controller. See the zero-byte SSD diagnostic reference for a deeper technical explanation of controller and FTL failures.
- Firmware panic / BSOD
Firmware panics cause the drive to drop offline, trigger BSODs, or fail to initialize. Because PC-3000 firmware-level FTL rebuilding is not available for Pascal, recovery relies on stabilizing the hardware through board-level repair.
- Drive not recognized in BIOS
- BSOD with 990 PRO installed
- Incorrect temperature readings
- Drive disappears randomly under load
- SMART health degradation bug
Early 990 PRO batches suffered from a firmware anomaly where the Pascal controller incorrectly calculates wear-leveling and NAND degradation. SMART health percentages drop at an impossible rate (10% within days with minimal writes). Once health reaches 0%, the controller enters read-only mode or BSY state from a corrupted defect mapping table.
- SMART health dropping rapidly with minimal writes
- Health percentage fell 10% or more in days
- Drive entered read-only mode prematurely
- Samsung Magician shows critical health warning
- Controller electrical failure
The Pascal controller or surrounding power management ICs fail electrically, preventing the drive from initializing. Because PC-3000 lacks firmware loaders for Pascal, recovery requires component-level microsoldering rather than software-based FTL reconstruction. If the Pascal IC itself has a dead short to ground, the data is unrecoverable.
- Drive completely dead, no enumeration in any system
- No response to PCIe bus queries
- No power draw or abnormal power draw measured at M.2 connector
- Drive does not appear in any USB enclosure or system
How Is Data Recovered from a Failed Samsung Pascal Controller SSD?
Data is recovered from a failed controller SSD by keeping the original board alive, reading controller state with PC-3000 SSD, and rebuilding the Flash Translation Layer from surviving NAND metadata. If firmware access requires Safe Mode or a volatile loader, that work happens before imaging. When the controller also handles decryption, chip-off returns unreadable data.
At our Austin, TX lab, the goal is to keep the original controller stable long enough to expose ROM state, firmware behavior, and NAND metadata without letting the drive keep writing to itself. Our SSD data recovery overview covers lab intake and triage, why SSDs report 0 bytes explains capacity failures, and how SSD controller encryption works explains why the original silicon matters.
- Samsung Pascal Controller failures usually break the Flash Translation Layer, firmware boot path, or local power rail before macOS or Windows sees a mountable volume. Symptoms such as Drive not recognized in BIOS, BSOD with 990 PRO installed, Incorrect temperature readings are useful to recognize, but on this controller they do not unlock a tooling path we can offer in-lab.
- Samsung Pascal Controller is not on ACELab's PC-3000 SSD supported-controller list (PC-3000 SSD / PC-3000 SSD Extended 3.8.10). Without firmware utility coverage, the controller's mapping tables, internal loader, and any factory diagnostic mode are inaccessible to us, which means no firmware-level recovery is on the table.
- Samsung Pascal Controller fuses AES-256 keys to the controller silicon, so desoldering the NAND chips returns ciphertext that cannot be decrypted without reviving the original controller through tooling we do not currently have for this controller.
Frequently Asked Questions
Can software recover data from a dead Samsung Pascal Controller?
Why not use chip-off recovery on Samsung SSDs?
Does Rossmann recover data from Samsung Pascal Controller drives?
Can you recover deleted files from a Samsung Pascal Controller SSD?
Other Samsung Controllers
Samsung Elpis Controller
NVMe Gen4 · Samsung 980 PRO, Samsung PM9A1 (OEM equivalent)
Samsung Phoenix Controller
NVMe Gen3 · Samsung 970 EVO, Samsung 970 EVO Plus (original revision)
Samsung MKX Controller
SATA · Samsung 870 EVO, Samsung 870 QVO
Samsung Pablo
NVMe Gen3 · Samsung 980 (non-PRO), Samsung PM991/PM991a (OEM)
Have a Samsung Pascal Controller drive?
We do not currently offer in-lab recovery for Samsung Pascal Controller SSDs because the controller is not on ACELab's PC-3000 SSD supported-controller list. Contact us before shipping anything; we will confirm in writing what we can and cannot do for your specific drive.