| Standard | Bit | Clock | Transfer rates
(bi-directional) |
|---|---|---|---|
| PCI 2.3 | 32 Bit | 33 MHz | 133 MB/sec |
| PCI 2.3 | 32 Bit | 66 MHz | 266 MB/sec |
| PCI 64 | 64 Bit | 33 MHz | 266 MB/sec |
| PCI 64 | 64 Bit | 66 MHz | 533 MB/sec |
| PCI-X 1.0 | 64 Bit | 66 MHz | 533 MB/sec |
| PCI-X 1.0 | 64 Bit | 100 MHz | 800 MB/sec |
| PCI-X 1.0 | 64 Bit | 133 MHz | 1066 MB/sec |
| PCI-X 2.0 (DDR) | 64 Bit | 133 MHz | 2132 MB/sec |
| PCI-X 2.0 (QDR) | 64 Bit | 133 MHz | 4264 MB/sec |
| PCI-Express | 1 Lines 8 Bit | 2.5 GHz | 512 MB/sec |
| PCI-Express | 2 Lines 8 Bit | 2.5 GHz | 1 GB/sec |
| PCI-Express | 4 Lines 8 Bit | 2.5 GHz | 2 GB/sec |
| PCI-Express | 8 Lines 8 Bit | 2.5 GHz | 4 GB/sec |
| PCI-Express | 16 Lines 8 Bit | 2.5 GHz | 8 GB/sec |
The HUB 2 connection offers a maximum data transfer rate of 1 GB per second between Southbridge and Northbridge, the following combination possibilities resulting for a maximum interface load for a P64H2 chip:
- 1x PCI-X 133 MHz = 1066 MB/sec
- 1x PCI-X 100 MHz = 800 MB/sec
- 2x PCI-X 66 MHz = 1066 MB/sec
- 2x PCI 64 66 MHz = 1066 MB/sec
- 3x PCI 64 33 MHz = 798 MB/sec
Standard cards do not exhaust data transfer rates of 1,066 MB per second. Only high-performance products, such as SCSI320 cards (320 MB/s) or 10 GB LAN chips (max. 1250 MB per second), would be sensible candidates.
Many PCI cards are capable of performing their services not only with conventional PCI 2.3 slots, but also with a PCI 64 slot. Examples of these are network cards, RAID controllers and even 56K modems. In order to avoid incorrect configurations, they have an additional notch on the connection contacts.
A 56K modem for a 64 bit slot
The 56K modem operates here with conventional 33 MHz in 32 bit mode.
A Promise SATA controller for a 64 bit slot
This Raid controller can handle even 66 MHz in 32 bit mode.
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