VIA Nano QuadCore L4700 socket: VIA NanoBGA2
The VIA Nano QuadCore L4700 uses the VIA NanoBGA2 package. It is a 27.5 W soldered 40 nm quad core part at 1.2 GHz with burst to 1.466 GHz and cannot be replaced.
- Socket
- VIA NanoBGA2
- Launched
- May 2011
- Cores and threads
- 4 and 4
- Base power
- 27.5 W
- Codename
- CNQ
- Segment
- Embedded
- Family
- VIA Nano QuadCore
- Clocks
- 1.2 / 1.47 GHz
VIA Nano QuadCore L4700 specifications
| Cores | 4 |
|---|---|
| Threads | 4 |
| Core architecture | Isaiah cores on 40 nm |
| Clocks | 1.2 GHz base, 1.466 GHz burst |
| Cache | 4 MB L2 (2 × 2 MB) |
| Processor base power (TDP) | 27.5 W |
| Manufacturing process | 40 nm |
| Memory support | DDR2 and DDR3, single channel |
| VIA V4 bus | 1333 MHz shared between dies |
| Integrated graphics | None on package (chipset feature) |
| Multiplier | Locked |
| Package | nanoBGA2 (FCBGA, 400 balls, 21 × 21 mm, soldered) |
Motherboard compatibility
VIA Nano QuadCore L4700 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 QuadCore L4700 is
VIA Nano QuadCore L4700 is a quad core CNQ processor that VIA released in May 2011 for soldered embedded and mobile boards. It runs at 1.2 GHz base with Adaptive Overclocking to 1.466 GHz where thermal headroom allows. Four cores give 4 threads with no Hyper-Threading. Cache is 4 MB of L2 in two 2 MB blocks. Power is 27.5 W maximum on 40 nm TSMC silicon.
The L4700 was the first QuadCore model, pairing two Nano X2 dies on one package. VIA claimed an efficiency edge over Atom and Brazos parts in CPU heavy tests. Multimedia and productivity apps run within the low power budget.
There is no on-die graphics on this package. Display and I/O hang off the companion chipset. The 1.466 GHz burst needs thermal headroom under the heatsink.
Socket and motherboard compatibility
The Nano QuadCore L4700 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 E-Series parts for board reuse. A faster system means a new board.
The processor talks to its companion chipset over the VIA V4 bus at 1333 MHz shared between the dies. Board manuals decide slot wiring.
Memory, PCIe and cooling
Memory support is DDR2 and DDR3 over a single 64 bit channel. Single channel operation is a hard limit of the platform, so size the soldered memory or single DIMM for the whole workload. ECC is not offered.
The V4 bus runs at 1333 MHz to the companion chipset, and PCIe, display and storage I/O all hang off that chip. Compact flash or small SSDs suit the bandwidth.
Cooling uses a low profile embedded heatsink under the 27.5 W envelope. Fanless operation is possible in ventilated chassis.
Upgrade paths
There is no CPU upgrade path on soldered nanoBGA2. The L4700 cannot be removed, so more speed means a new board. A nearby quad reference at higher clocks is VIA Nano QuadCore L4800.
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 QuadCore L4700 use?
It uses VIA NanoBGA2, a soldered package. The chip cannot be removed.
How is the Nano QuadCore L4700 different from the L4800?
The L4700 runs at 1.2 GHz base. The L4800 runs at 1.466 GHz base.
What memory does the Nano QuadCore L4700 use?
DDR2 and DDR3 over a single 64 bit channel.
Can the Nano QuadCore L4700 be upgraded?
No. A faster system means a new board.
Sources and verification
- VIA QuadCore launch (TechSpot, L4700 1.2 GHz, burst 1.46 GHz, 27.5W, May 2011)
- VIA QuadCore press release (VIA, 27.5W QuadCore May 2011)
Facts last checked against these sources on . Page last edited on .