VIA Nano U2500 socket: VIA NanoBGA2
The VIA Nano U2500 uses the VIA NanoBGA2 socket. It is a 6.8 W single-core Isaiah soldered part at 1.2 GHz with 1 MB of L2 cache for fanless embedded boards.
- Socket
- VIA NanoBGA2
- Launched
- May 2008
- Cores and threads
- 1 and 1
- Base power
- 6.8 W
- Codename
- CNA
- Segment
- Embedded (soldered)
- Family
- VIA Nano
- Clocks
- 1.2 GHz
VIA Nano U2500 specifications
| Cores | 1 |
|---|---|
| Threads | 1 |
| Core architecture | Isaiah cores on 65 nm |
| Clocks | 1.2 GHz (no turbo) |
| Cache | 64+64 KB L1 plus 1 MB L2 |
| Default TDP | 6.8 W |
| Idle power | 100 mW |
| Manufacturing process | 65 nm |
| Memory support | DDR2 through the board chipset |
| Front side bus | 800 MHz |
| PCI Express | Expansion hangs off the companion chipset |
| Integrated graphics | None (companion graphics where fitted) |
| Multiplier | Locked |
| Package | NanoBGA2 (21 × 21 mm, soldered) |
Motherboard compatibility
VIA Nano U2500 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 U2500 is
The VIA Nano U2500 is an ultra-low-voltage 1.2 GHz single core from May 29, 2008. It runs one Isaiah core at 1.2 GHz with no turbo, so 1 core gives 1 thread. Cache is 64 KB data plus 64 KB instruction L1 with 1 MB of exclusive L2 on a 65 nm process. Power is rated at 6.8 W on NanoBGA2.
The U2500 balances U-series efficiency and speed with a 12x multiplier on an 800 MHz V4 bus. Idle power drops to 100 mW. It exists because device makers wanted more than the 1.0 GHz U2300 without leaving the fanless envelope. The chip is soldered and cannot be replaced.
Socket and motherboard compatibility
The U2500 ships soldered on NanoBGA2 embedded boards with a VIA companion chipset, pin-compatible with VIA C7 boards for OEM transitions. There is no socket upgrade and no board swap without replacing the whole device. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.
Memory, PCIe and cooling
Memory is DDR2 through the board chipset.
An 800 MHz VIA V4 bus ties the CPU to the companion chipset. Expansion hangs off the chipset.
Cooling is the device maker heat spreader for the 6.8 W envelope, with PowerSaver trimming draw to 100 mW at idle.
Upgrade paths
On NanoBGA2 there is no CPU upgrade path because the chip is soldered, so a faster board means replacing the whole device. The VIA Nano U2400 at 1.3 GHz and up is the next U-series up for device makers, and the VIA Nano U2300 at 1.0 GHz is the lower-power option.
Frequently asked questions
What socket does the Nano U2500 use?
NanoBGA2, soldered, so it cannot be replaced or upgraded.
How many cores does the Nano U2500 have?
One core and 1 thread at 1.2 GHz with 1 MB of L2 cache.
Can the Nano U2500 be replaced?
No, the U2500 is soldered on NanoBGA2 with no socket upgrade path.
Sources and verification
Facts last checked against these sources on . Page last edited on .