Motherboard

1. Motherboard cs3353

2. Circuit board • A non-conductive substrate containing conductive pathways connecting electronic components.

3. Circuit Board • A circuit board is covered with conductive tracks etched from copper sheets and laminated to the non-conductive substrate.

4. Motherboard • A motherboard is a circuit board.

5. Motherboard synonyms • Mainboard • System board • Logic board • mobo

6. Motherboard • Provides the electrical connections by which electronic components can be connected together to form a complex functional system.

7. Computer Motherboard • Electronic components • Interconnects • Physical connectors, sockets, slots, etc.

8. Motherboard • Slots • Memory • Additional circuit boards • PCIe • Sockets • CPU dies (1, 2, 4 are common) • Power receptacles • Chipset • GPU

9. 4 CPU Mobo

10. Chipset • A group of electronic components (chips) that manage the data flow on a mobo • Data flow between the processors, memory, peripherals. • The chipset is usually identified as the component northbridge and southbridge chips soldered to the mobo

11. Northbridge • The motherboard components between the CPU die and • Main memory • GPU • Southbridge

12. Southbridge • The motherboard components between the IO buses and the northbridge • BIOS • PCI • USB • ID • SATA

13. Northbridge Integration • Newer CPU designs integrate the northbridge into the CPU chip design.

14. Platform Controller Hub • Integration of the northbridge and southbridge is common with the PCH chip.

15. Mobo slots • PCIe • Memory

16. PCIe Slots • Peripheral Component Interconnect express • Characterized by different pin configurations • PCI e mini • Legacy • x 16 • Etc.

17. PCIe Bandwidth • PCI e 1.0 250MB/s • PCI e 2.0 up to 500MB/s • PCI e 3.0 up to 985 MB/s • PCI e 4.0 up to 1900 MB/s

18. Memory Slots • Characterized by the number of separate channels • Single • Dual • Triple • Quad

19. Multi-Channel Memory slots • Performance gains are governed by factors such as Amdah’s law.

20. Memory Bandwidth • First there were SIMMs – 32 bits wide • Then there were DIMMS – 64 bits wide

21. Memory Bandwidth • A function of the DIMM (64 bits/channel) • Number of channels (typically 2, 3, or 4) • Rated memory cycle time (cycles/sec) • bits per byte

22. Memory bandwidth • A computer uses DDR3-1066MHz memory modules in a dual memory channel mobo. Compute the max memory bandwidth 2 ch * 1.066 GHz * (64bits/ch)/cycle / 8bits/byte = 17.056 GB/sec

23. Other Common Bus: USB • Universal Serial Bus • USB 2.0 480 Mb/sec • USB 3.0 5 Gb/sec

24. A note about bus speeds • Multiple devices typically share a bus. The bus bandwidth is divided among the devices on the same bus.