Intel Atom P5921B socket: BGA 2106
The Intel Atom P5921B uses the BGA 2106 package, soldered with 2106 balls. It is an 8-core Snow Ridge network processor at a fixed 2.2 GHz, and the soldered chip cannot be replaced.
- Socket
- BGA 2106
- Launched
- March 2020
- Cores and threads
- 8 and 8
- Base power
- n/a
- Codename
- Snow Ridge
- Segment
- Embedded
- Family
- Intel Atom
- Clocks
- 2.2 / 2.2 GHz
Intel Atom P5921B specifications
| Cores | 8 |
|---|---|
| Threads | 8 |
| Core architecture | Tremont (Snow Ridge) |
| Clocks | 2.2 GHz fixed (no boost) |
| Cache | 9 MB L2, no L3 |
| Manufacturing process | 10 nm |
| Memory support | DDR4 up to 2933 MT/s with ECC, one channel, up to 64 GB |
| PCI Express | 32 lanes (16x PCIe 3.0 plus 16x PCIe 2.0) |
| Integrated graphics | None (board management graphics where present) |
| Multiplier | Locked |
| ECC memory | Supported, DDR4 ECC |
| Package | BGA2106 soldered, 47.5 × 47.5 mm |
| Cooler in the box | None (board heatsink) |
Motherboard compatibility
Intel Atom P5921B needs a motherboard with a BGA 2106 socket. Chipset by chipset data for this codename is not recorded yet. See the BGA 2106 chipset list and the board maker's CPU support list.
BGA 2106 at a glance
| Type | BGA, 2,106 contacts |
|---|---|
| Package size | 47.5 × 47.5 mm |
| Introduced | 2020 |
| Memory | DDR4 with ECC, 2 channels, up to 256 GB (2400 or 2933 MT/s by SKU) |
| Cooler mounting holes | Not applicable (soldered) |
What the Atom P5921B is
The Atom P5921B is an 8-core network processor that Intel listed in the first quarter of 2020 with the Snow Ridge P5000 range for base transceiver stations. Its Tremont cores run a fixed 2.2 GHz without boost across 8 threads with no Hyper-Threading. Cache is 9 MB of L2 with no L3, and the 10 nm process suits entry edge boxes with tight power limits.
The chip targets the smallest P-series appliances that still need accelerators and ECC. Eight cores cover a single sector with room for control traffic, while the single memory channel trims board cost over dual channel siblings. The BGA2106 package solders to the board with 2106 balls in a 47.5 by 47.5 mm flip chip, so there is no socket retention.
QuickAssist accelerates crypto and compression inline, while USB, SATA and UART cover board management. The multiplier is locked. The 85 C maximum with minus 40 C minimum suits remote masts as well as labs.
Socket and motherboard compatibility
The P5921B fits BGA 2106 only. The chip solders to the network board, so there is no socket retention and no later processor upgrade. Board support is fixed to the BGA2106 platform with DDR4 ECC memory in a single channel layout.
Because the package is soldered, buyers compare complete appliances rather than separate parts. A buyer who needs more cores and channels in the same footprint steps to the Intel Atom P5931B with 12 cores and two channels. The 8-core entry stays in its small cell role for its whole service life.
The Socket vs chipset: what decides whether a CPU works guide explains why embedded compatibility lives in board design files rather than a CPU support list. For service, a failed processor means a board replacement through the vendor.
Memory, PCIe and cooling
The memory controller supports DDR4 up to 2933 MT/s in a single channel to 64 GB with ECC. Population follows the board layout with DIMM or soldered memory per appliance design. One channel trims cost and power where eight cores need less bandwidth than larger siblings.
The SoC provides 32 PCIe lanes as 16 Gen3 plus 16 Gen2 for NICs, NVMe and storage controllers. Boards split the lanes across Ethernet ports and drives, with the exact split fixed per design. Cooler mounting uses no desktop pattern. Cooling follows the appliance thermal design with a small board heatsink and chassis airflow.
Eight cores without Hyper-Threading suit light sectors. Each core keeps its own L2 slice from the shared 9 MB pool, which keeps timing steady under load. QuickAssist offload matters more than headline clocks for secure templates.
Upgrade paths
On the same BGA2106 footprint there is no CPU upgrade path, since the chip is soldered. Owners who need more cores move to another BGA2106 board with a larger P sibling rather than a chip swap. Sector count and memory size remain the practical choices.
Within Snow Ridge P, the steps up are the Intel Atom P5931B for 12 cores, the Intel Atom P5942B for 16 cores and the Intel Atom P5962B for 24 cores. All four share 2.2 GHz fixed clocks and BGA2106, so the choice is core count and channels rather than speed.
Moving past BGA2106 entirely means a new board on Xeon D or Xeon Scalable with more lanes and channels. For buyers choosing in 2020, the P5921B suited entry 8-core cells with one channel, while larger parts added channels for density. The range shares Snow Ridge and 10 nm, but each SKU ships soldered to its own board.
Frequently asked questions
What socket does the Intel Atom P5921B use?
It uses BGA 2106, soldered with 2106 balls. The chip cannot be removed, so an upgrade means replacing the board.
What memory does the P5921B support?
DDR4 up to 2933 MT/s with ECC in one channel to 64 GB. Population follows the board layout per appliance design.
Can the P5921B boost above 2.2 GHz?
No. The chip runs a fixed 2.2 GHz without turbo or Hyper-Threading. Deterministic clocks suit small cell templates.
How does the P5921B differ from the P5931B?
The P5921B has 8 cores with one memory channel, while the Intel Atom P5931B has 12 cores with two channels. Both share 2.2 GHz fixed clocks and BGA2106.
Sources and verification
- Intel Atom Processor P5921B specifications (Intel ARK)
- List of Intel Atom processors - Snow Ridge (Wikipedia)
Facts last checked against these sources on . Page last edited on .