VIA Nano X2 U4025 socket: VIA NanoBGA2
The VIA Nano X2 U4025 uses the VIA NanoBGA2 socket. It is a 13 W soldered 40 nm dual core part at a fixed 1.2 GHz and cannot be replaced.
- Socket
- VIA NanoBGA2
- Launched
- January 2011
- Cores and threads
- 2 and 2
- Base power
- 13 W
- Codename
- CNC
- Segment
- Mobile (soldered)
- Family
- VIA Nano X2
- Clocks
- 1.2 GHz
VIA Nano X2 U4025 specifications
| Cores | 2 |
|---|---|
| Threads | 2 |
| Core architecture | Isaiah cores on 40 nm |
| Clocks | 1.2 GHz (no burst) |
| Cache | 2 MB L2 (1 MB per core) |
| Processor base power (TDP) | 13 W |
| Manufacturing process | 40 nm |
| Memory support | DDR2 and DDR3-1333, single channel |
| VIA V4 bus | 1066 MHz to the companion chipset |
| Integrated graphics | None on package (chipset feature) |
| Multiplier | Locked |
| Package | nanoBGA2 (FCBGA, 400 balls, 21 × 21 mm, soldered) |
Motherboard compatibility
VIA Nano X2 U4025 needs a motherboard with a VIA NanoBGA2 socket. Chipset by chipset data for this codename is not recorded yet. See the VIA NanoBGA2 chipset list and the board maker's CPU support list.
VIA NanoBGA2 at a glance
| Type | BGA, 400 contacts |
|---|---|
| Package size | 21.0 × 21.0 mm |
| Introduced | May 2008 |
| Memory | DDR2 through the board chipset |
| Cooler mounting holes | Not applicable (soldered) |
What the Nano X2 U4025 is
VIA Nano X2 U4025 is a dual core CNC mobile processor that VIA released in January 2011 for soldered thin boards. It runs at a fixed 1.2 GHz with no burst and has no Hyper-Threading, so 2 cores give 2 threads. Cache is 1 MB of L2 per core. Power is 13 W on 40 nm TSMC silicon.
The U prefix marks ultra low voltage for thin laptops and embedded boxes. Idle power drops toward half a watt with Power Saver states. Office documents and browsing run within the 13 W budget.
There is no on-die graphics on this package. Display and I/O hang off the companion chipset over the 1066 MHz V4 bus. Hardware virtualization and PadLock AES ship on die.
Socket and motherboard compatibility
The Nano X2 U4025 solders to VIA NanoBGA2 with 400 balls in a 21 by 21 mm footprint and cannot be moved. It stays pin compatible with Eden, C7 and Nano parts for board reuse. A faster system means a new board.
The processor talks to its VX900, VN1000 or VX11 companion chipset over the V4 bus. Board manuals decide slot wiring.
Memory, PCIe and cooling
Memory support is DDR2 and DDR3 at up to 1333 MT/s over a single 64 bit channel with about 10.7 GB/s of bandwidth. Single channel operation is a hard limit, so size the memory once. ECC is not offered.
The V4 bus runs at 1066 MHz to the companion chipset. PCIe, display and storage I/O all hang off that chip.
Cooling uses a low profile heatsink under the 13 W envelope. Fanless thin builds are possible with chassis airflow.
Upgrade paths
There is no CPU upgrade path on soldered nanoBGA2. The U4025 cannot be removed, so more speed means a new board. A nearby dual reference with burst clocks is the U4300 class at 1.2 to 1.467 GHz.
A platform move means a new embedded board on a current package. Keep the old board for control duty after a wipe.
Frequently asked questions
What socket does the VIA Nano X2 U4025 use?
It uses VIA NanoBGA2, a soldered package. The chip cannot be removed.
Does the Nano X2 U4025 have Hyper-Threading?
No. Two cores give 2 threads at a fixed 1.2 GHz.
What memory does the Nano X2 U4025 use?
DDR2 and DDR3-1333 over a single 64 bit channel.
Can the Nano X2 U4025 be upgraded?
No. A faster system means a new board.
Sources and verification
- List of VIA Nano microprocessors (Wikipedia, X2 U4025 1.2 GHz 13W Jan 2011 nanoBGA2)
- VIA Nano X2 U4300 Specs (TechPowerUp, CNC X2 family, nanoBGA2, 40nm)
Facts last checked against these sources on . Page last edited on .