AMD Phenom X4 9750B socket: Socket AM2+
The AMD Phenom X4 9750B uses the Socket AM2+ socket. It is a 95 W quad-core Agena business-class part at 2.4 GHz with 4x512 KB of L2 plus 2 MB of shared L3 for corporate desktops.
- Socket
- Socket AM2+
- Launched
- August 2008
- Cores and threads
- 4 and 4
- Default TDP
- 95 W
- Codename
- Agena
- Segment
- Desktop
- Family
- AMD Phenom X4
- Clocks
- 2.4 GHz
AMD Phenom X4 9750B specifications
| Cores | 4 |
|---|---|
| Threads | 4 |
| Core architecture | Agena cores on 65 nm |
| Clocks | 2.4 GHz (no turbo) |
| Cache | 4x512 KB L2 plus 2 MB shared L3 |
| Default TDP | 95 W |
| Manufacturing process | 65 nm |
| Memory support | DDR2-800 and DDR2-1066, two channels |
| HyperTransport | 1.8 GHz |
| PCI Express | PCIe from the board chipset |
| Integrated graphics | None (board video where fitted) |
| Multiplier | Locked |
| Package | Socket AM2+ (940 pins) |
| Core voltage | 1.20 to 1.25 V |
Motherboard and chipset compatibility
AMD Phenom X4 9750B needs a motherboard with a Socket AM2+ socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| 700 series | 790FX, 790X, 770 | 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 AM2+.
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 Phenom X4 9750B is
The AMD Phenom X4 9750B is a business-class 2.4 GHz quad core from August 15, 2008. It runs four K10 cores at 2.4 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 on Socket AM2+.
The 9750B is built on the fixed B3 stepping at 1.20 to 1.25 V, part HD975BWCJ4BGH, with no TLB erratum, and its HyperTransport link runs at 1.8 GHz. The B suffix denotes business-class supply with availability guaranteed for 24 months, which is why corporate buyers chose it over the consumer 9750.
Socket and motherboard compatibility
The 9750B needs a Socket AM2+ board with DDR2 memory and a BIOS that recognizes Agena business-class parts. Most AM2+ boards support it after a BIOS refresh. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.
Memory, PCIe and cooling
Memory is DDR2-800 and DDR2-1066 in two channels.
HyperTransport 3.0 at 1.8 GHz links the CPU to the chipset. PCIe slots hang off the chipset.
Cooling should be rated for 95 W on the 48 x 96 mm mount, with Cool'n'Quiet trimming clocks and voltage at idle.
Upgrade paths
On Socket AM2+ the upgrade is the AMD Phenom X4 9850B at 2.5 GHz for a newer business-class quad, or the AMD Phenom X4 9750 (95W) consumer part at the same speed. The AMD Phenom X4 9600B at 2.3 GHz is the cheaper business-class quad.
Frequently asked questions
What socket does the Phenom X4 9750B use?
Socket AM2+, the 940-pin package on DDR2 boards with HyperTransport 3.0.
How many cores does the Phenom X4 9750B have?
Four cores and 4 threads at 2.4 GHz with 512 KB of L2 per core plus 2 MB of shared L3.
What does the B in Phenom X4 9750B mean?
The B suffix marks a business-class part with 24-month guaranteed availability for corporate fleets.
Sources and verification
Facts last checked against these sources on . Page last edited on .