Надо поменять REG-память на обычную

Four DDR2 SDRAM Dual Inline Memory Module (DIMM) sockets
Support for 256MB to 4 GB Unbuffered ECC on Non-ECC DDR2 400/533 system
memory
Support for single-sided or double-sided DIMMs (DDR2 400/533)
- To run DDR2 400 MHz memory at full speed requires an Intel®
Pentium® 4 processor with 800 MHz system bus frequency.
- DIMMs must be ECC x8 or Non-ECC x8 or x16 DDR2 unbuffered.
- Supports Intel x4 SDDC only with x4 DIMMS