AMD A4-3305M socket: Socket FS1
The AMD A4-3305M uses the Socket FS1 socket. It is a socketed 35 W dual core Llano mobile APU at 1.9 GHz to 2.5 GHz with half the L2 of the A4-3300M.
- Socket
- Socket FS1
- Launched
- December 2011
- Cores and threads
- 2 and 2
- Default TDP
- 35 W
- Codename
- Llano
- Segment
- Mobile (socketed)
- Family
- AMD A4
- Clocks
- 1.9 / 2.5 GHz
AMD A4-3305M specifications
| Cores | 2 |
|---|---|
| Threads | 2 |
| Core architecture | Stars (K10) cores on 32 nm |
| Clocks | 1.9 GHz base, up to 2.5 GHz Turbo Core |
| Cache | 1 MB L2 (512 KB per core) |
| Default TDP | 35 W |
| Manufacturing process | 32 nm |
| Memory support | DDR3-1333, two channels |
| PCI Express | PCIe 2.0 from the APU (lane layout varies by board design) |
| Integrated graphics | AMD Radeon HD 6480G (593 MHz) |
| Multiplier | Locked |
| Package | Socket FS1 (PGA, 722 contacts) |
Motherboard and chipset compatibility
AMD A4-3305M needs a motherboard with a Socket FS1 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| Hudson mobile | A60M, A70M | Works out of the box |
Board makers publish a CPU support list for every model. Check it for your exact board before buying. Chipset details for Socket FS1.
Socket FS1 at a glance
| Type | rPGA, 722 contacts |
|---|---|
| Package size | n/a |
| Introduced | June 2011 |
| Memory | DDR3-1333 and 1600, two channels |
| Cooler mounting holes | Board specific (laptop heatsink) |
What the A4-3305M is
AMD A4-3305M is a dual core Llano mobile APU that AMD released in December 2011 for socketed laptops. It uses the Stars K10 core design on a 32 nm process, running at 1.9 GHz base with Turbo Core to 2.5 GHz. The cache is 1 MB of L2 with 512 KB per core, half the A4-3300M at the same clocks. Power is 35 W. Graphics carry the HD 6480G name with 160 shaders at a faster 593 MHz to offset the smaller cache.
The December refresh trades cache for graphics clocks at identical CPU rates and power. Office tasks that fit the smaller L2 feel the same, while display work gains from the 593 MHz block. Threads equal cores at 2.
Laptops pair it with DDR3-1333 SODIMMs and a single fan. The same 35 W envelope as the 3300M keeps heatsinks interchangeable. The How to find your CPU socket type guide shows how to confirm the socket.
Socket and motherboard compatibility
The A4-3305M fits Socket FS1 with 722 contacts in pin grid form. Hudson A60M and A70M boards carry it where the BIOS lists the exact A4-3305M string. Late 2011 models need firmware new enough to list the refresh SKU.
At 35 W any Socket FS1 heatsink of that class covers it. The Socket vs chipset: what decides whether a CPU works guide explains the board order.
Memory, PCIe and cooling
Memory support is DDR3-1333, two channels. Two matched SODIMMs feed cores and the faster graphics block. DDR3-1600 stays an MX feature.
PCI Express is revision 2.0 from the APU for Wi-Fi and storage. Most builds stay on integrated graphics.
Cooling is board specific for 35 W. The smaller cache does not change thermal behavior against the 3300M.
Upgrade paths
On Socket FS1 the A4-3305M can move to full cache A4 parts or faster A6 and A8 APUs where access and BIOS allow it. Memory and storage carry over. A full cache comparison at the same clocks is AMD A4-3300M on the same socket.
A platform move means a new laptop. Keep the current body for office duty after a wipe.
Frequently asked questions
What socket does the AMD A4-3305M use?
It uses Socket FS1 in pin grid form with 722 contacts.
How is the A4-3305M different from the A4-3300M?
Clocks match at 1.9 GHz to 2.5 GHz, but L2 is 1 MB instead of 2 MB while graphics run at 593 MHz instead of 444 MHz.
What memory does the A4-3305M use?
DDR3-1333, two channels.
Can the A4-3305M be replaced?
Yes, in socketed laptops with manual access and BIOS support.
Sources and verification
- AMD A4-3305M Notebook APU (AMD archived product page)
- AMD A4-3305M Notebook Processor (Notebookcheck)
Facts last checked against these sources on . Page last edited on .