Intel Core 2 Quad Q9505S
Drops into a supported LGA 775 board as it is; check the board's CPU list. How to check.
Intel Core 2 Quad Q9505S: 4-core, 2.83 GHz, Yorkfield, LGA 775, 1333 MT/s FSB, 6 MB (2 x 3 MB) L2, 65 W TDP.
Among the 6 MB quads, this is the highest-clocked 65 W part: the Q9505S runs 2.83 GHz from a multiplier of 8.5 on a 1333 MT/s bus, with 6 MB of L2 as 2 x 3 MB. It launched in Q3 2009, the same quarter as the standard Q9505. sSpec is the code printed on the lid, and this one is SLGYZ, R0 stepping, CPUID 1067A; it differs from the standard Q9505's code by one letter, so read it carefully. Intel allows a 76.3 °C Tcase on this part, a higher ceiling than the standard chip gets. VT-x and SSE4.1 are both present, and Enhanced SpeedStep is there too.
| Family | Core 2 Quad |
|---|---|
| Codename | Yorkfield |
| Socket | LGA 775 |
| Cores / threads | 4 / 4 |
| Base clock | 2.83 GHz |
| Front-side bus | 1333 MT/s (333 MHz base clock) |
| Multiplier | 8.5x |
| L2 cache | 6 MB (2 x 3 MB) |
| TDP | 65 W |
| Process | 45 nm |
| Launch | Q3 2009 |
| Dual-socket capable | No |
| VT-x | Yes |
| SSE4.1 | Yes |
| Enhanced SpeedStep | Yes |
| Max case temperature | 76.3 °C |
| Voltage range (VID) | 0.85 V to 1.3625 V |
Steppings and microcode IDs
| Stepping | CPUID | sSpec |
|---|---|---|
| R0 | 1067A | SLGYZ |
A BIOS needs a microcode update matching the CPUID (and, for Xeons, the LGA 771 platform ID). See LGA 771 Xeon microcode and how to read your stepping.
Mod notes
Look for the Q9505S itself on the board's CPU list, plus the BIOS version that adds it; support for 45 nm Core 2 Quads in general is the minimum, not proof. No physical mod is involved.