The term SL68E most commonly refers to a specific variation (E0 stepping) of the vintage 1.90GHz Intel Celeron processor from the Willamette-128 family
The SL68E is a desktop processor from the Intel Celeron family, first released in 2002. It is a vintage, single-core chip built on Intel's older NetBurst architecture.Core Specifications

• Clock Speed: 1.90 GHz
• Socket Type: Socket 478 (mPGA478B)
• Front Side Bus (FSB): 400 MHz
• L2 Cache: 128 KB
• Manufacturing Process: 180 nanometer (0.18 micron)
• Core Name: Willamette-128
• Thermal Design Power (TDP): 73 Watts

Key Technical Details

• Stepping: The "SL68E" code specifically identifies the E0 stepping version of this chip.
• Voltage Range: It typically operates between 1.75 Volts and 1.80 Volts.
• Limitations: Because it is a Celeron, it has a much smaller L2 cache (128 KB)