Rise mP6 PR166 socket: Super Socket 7
The Rise mP6 PR166 uses the Super Socket 7 socket. It is a 7.28 W single-core mP6 desktop part at 166 MHz with 16 KB of L1 cache for low-power Super Socket 7 boards.
- Socket
- Super Socket 7
- Launched
- October 13, 1998
- Cores and threads
- 1 and 1
- Base power
- 7.28 W
- Codename
- mP6
- Segment
- Desktop
- Family
- Rise mP6
- Clocks
- 0.17 GHz
Rise mP6 PR166 specifications
| Cores | 1 |
|---|---|
| Threads | 1 |
| Core architecture | mP6 Kirin (Rise) |
| Clocks | 166 MHz base, no turbo |
| Cache | 16 KB L1, L2 on board modules |
| Processor base power (TDP) | 7.28 W |
| Manufacturing process | 0.25 micron |
| Memory support | EDO DRAM and SDRAM through the board chipset |
| Front side bus | 83 MHz |
| Package | Super Socket 7 (BGA on PPGA adapter) |
| Multiplier | Locked (2x) |
| Integrated graphics | None |
Motherboard compatibility
Rise mP6 PR166 needs a motherboard with a Super Socket 7 socket. Chipset by chipset data for this codename is not recorded yet. See the Super Socket 7 chipset list and the board maker's CPU support list.
Super Socket 7 at a glance
| Type | PGA, 321 contacts |
|---|---|
| Package size | n/a |
| Introduced | May 1998 |
| Memory | EDO DRAM and SDRAM through the board chipset |
| Cooler mounting holes | Socket lug (clip) |
What the mP6 PR166 is
The Rise mP6 PR166 is a 166 MHz single-core desktop processor from October 1998. It runs one Rise mP6 Kirin core at 166 MHz with no turbo, so 1 core gives 1 thread. Cache is 16 KB of L1 with no on-die L2 on a 0.25 micron process with 3.6 million transistors. Power is rated at 7.28 W in a Super Socket 7 package on an 83 MHz front side bus with a 2x multiplier at 2.75 to 2.85 V.
Triple-pipelined integer paths with a pipelined FPU give the tiny mP6 die surprising throughput per watt, which is why the PR166 at 166 MHz suits fanless experiment boards. Rise launched mP6 parts on October 13, 1998 at $50. The chip supports MMX.
A 166 MHz clock on an 83 MHz bus with a 7 W class envelope suits passively cooled Super Socket 7 boards with EDO memory. The 2x ratio is simple for old boards. That is why the PR166 shipped in low-power terminals.
Socket and motherboard compatibility
The PR166 fits Super Socket 7 low-power desktops with mP6 support. It needs a 321-pin board with an 83 MHz bus path and a BIOS that lists Rise mP6 parts. The Socket vs chipset: what decides whether a CPU works guide covers pairing rules.
Fanless terminal boards are the natural match. Boards listing mP6 PR166 accept the chip with a tiny cooler. Boards with Intel-only microcode tables may refuse the Rise CPUID string.
Memory, PCIe and cooling
Memory is EDO DRAM and SDRAM through the board chipset, matched to the board sockets. The CPU has no memory controller and no on-die L2. Terminal boards commonly run EDO pairs.
An 83 MHz front side bus ties the CPU to the chipset, while PCI hangs off the chipset. No PCIe lanes exist. Cooling uses the socket lug clip with a cooler rated for 7.28 W.
Upgrade paths
On the same socket, a Rise mP6 PR266 such as Rise mP6 PR266 keeps the family for 200 MHz actual at 8.54 W on a 100 MHz bus when the board supports it. A WinChip 2-250 such as IDT WinChip 2-250 is the Centaur rival at higher clocks.
A move to AMD K6-2 needs K6 BIOS strings. The Super Socket 7 page lists the mP6 to Sharptooth range for planning.
Frequently asked questions
What socket does the mP6 PR166 use?
Super Socket 7. It is a 7.28 W mP6 desktop part at 166 MHz.
What memory does the PR166 use?
EDO DRAM and SDRAM through the board chipset.
What is the upgrade path from the PR166?
A Rise mP6 PR266 for 200 MHz actual.
Sources and verification
- Rise mP6 PR166 166MHz 7.28W Oct 1998 (mP6 Wikipedia)
- Rise mP6 Kirin specs (ZXC Rise)
- Super Socket 7 Rise mP6 (Wikipedia)
Facts last checked against these sources on . Page last edited on .