AMD Opteron 1356 (B3) socket: Socket AM2+
The AMD Opteron 1356 (B3) uses the Socket AM2+ socket. It is a 95 W quad-core Budapest server part at 2.3 GHz with 4x512 KB of L2 plus 2 MB of shared L3, the fastest Budapest single-socket quad.
- Socket
- Socket AM2+
- Launched
- June 2008
- Cores and threads
- 4 and 4
- Default TDP
- 95 W
- Codename
- Budapest
- Segment
- Server
- Family
- AMD Opteron
- Clocks
- 2.3 GHz
AMD Opteron 1356 (B3) specifications
| Cores | 4 |
|---|---|
| Threads | 4 |
| Core architecture | Budapest cores on 65 nm |
| Clocks | 2.3 GHz (no turbo) |
| Cache | 4x512 KB L2 plus 2 MB shared L3 |
| Processor base power (TDP) | 95 W |
| Average CPU power (ACP) | 75 W |
| Manufacturing process | 65 nm |
| Memory support | DDR2-800 unbuffered, two channels |
| HyperTransport | 2.0 GHz |
| PCI Express | PCIe Gen 2 from the board chipset |
| Integrated graphics | None |
| Multiplier | Locked |
| Package | Socket AM2+ (940 pins) |
| Core voltage | 1.25 V |
| Launch price | $377 manufacturer tray price at launch |
Motherboard compatibility
AMD Opteron 1356 (B3) needs a motherboard with a Socket AM2+ socket. Chipset by chipset data for this codename is not recorded yet. See the Socket AM2+ chipset list and the board maker's CPU support list.
Socket AM2+ at a glance
| Type | PGA, 940 contacts |
|---|---|
| Package size | 40 × 40 mm |
| Introduced | November 2007 |
| Memory | DDR2 up to PC2-8500 (DDR2-1066), two channels |
| Cooler mounting holes | 48 × 96 mm |
What the Opteron 1356 (B3) is
The AMD Opteron 1356 (B3) is the fastest Budapest single-socket server quad core, a 2.3 GHz part from June 3, 2008. It runs four K10 cores at 2.3 GHz with no turbo, so 4 cores give 4 threads. Cache is 512 KB of L2 per core under a shared 2 MB L3 on a 65 nm process. Power is rated at 95 W TDP with 75 W ACP on Socket AM2+.
Budapest is the single-socket server version of Agena for AM2+ uniprocessor servers. The B3 stepping, part OS1356WBJ4BGH at 1.25 V with a locked 11.5x multiplier, carries the hardware fix for the TLB bug in earlier steppings, and its HyperTransport link runs at 2.0 GHz. ACP reflects average data-center power against the 95 W thermal ceiling. The die holds 463 million transistors on 285 mm².
Socket and motherboard compatibility
The 1356 (B3) fits single-socket Socket AM2+ server boards with DDR2 memory and a BIOS that lists Budapest Opteron parts. It is a uniprocessor-only chip, so dual-socket boards are out. Validated pairings include NVIDIA nForce Pro 3400 class server boards. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.
Memory, PCIe and cooling
Memory is unbuffered DDR2-800 in two channels, up to PC2-6400 per the server memory list.
A 2.0 GHz HyperTransport link ties the CPU to the server chipset. PCIe Gen 2 slots hang off the chipset.
Cooling uses vendor qualified server heatsinks with threaded backplates for the 95 W envelope in 1U chassis with directed airflow.
Upgrade paths
On Socket AM2+ the 1356 (B3) is the Budapest ceiling, so the moves are the AMD Opteron 1354 (B3) at 2.2 GHz for a cheaper fixed-stepping quad, or the AMD Opteron 1352 (B3) at 2.1 GHz. Beyond AM2+ a move to a newer Opteron platform needs a new board and memory.
Frequently asked questions
What socket does the Opteron 1356 (B3) use?
Socket AM2+, in single-socket server boards with DDR2 memory.
How many cores does the Opteron 1356 (B3) have?
Four cores and 4 threads at 2.3 GHz with 512 KB of L2 per core plus 2 MB of shared L3.
What is the difference between ACP and TDP on the Opteron 1356?
ACP is average data-center power at 75 W; TDP is the 95 W thermal ceiling for cooling design.
Sources and verification
Facts last checked against these sources on . Page last edited on .