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Technology Stocks : Rambus (RMBS) - Eagle or Penguin
RMBS 101.61+2.8%Dec 5 3:59 PM EST
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To: Tenchusatsu who wrote (31911)10/10/1999 11:28:00 AM
From: grok  Read Replies (1) of 93625
 
RE: <How would you explain HubLink, the interface between the north and south bridges of Intel's 800-series of chipsets? It's only 8 bits wide, but it runs at 266 MHz for a maximum bandwidth of 266 MB/sec. No longer is the PCI bus in between the north and south bridges; it's now hanging off the south bridge. So if you trace traffic from PCI to memory, you'll find data first moving over a 32-bit PCI bus, then squeezed into an 8-bit HubLink port, then expanded out to the 16-bit Rambus interface, and finally expanded to 16 bytes inside the RDRAM device. Sounds insane, doesn't it? Tenchusatsu>

Hublink sounds like a good idea to me. They can do everything they need in 8 bits so why not do it? And I'm sure that 266 MHz is a piece of cake with low risk and testable on current testers. (Just like DDR!)

It seems to me that Rambus is a significantly different situation where they actually decrease performance in latency-sensitive apps (like maybe all apps?) with the serialization delay, create lots of complexity trying to regain the power increase with NAP/etc modes, and create a nightmare for the infrastructure by requiring all new test equipment (which actually may still not adequately test the chips!), etc.

All this to save pins on the controller?
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