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Technology Stocks : Rambus (RMBS) - Eagle or Penguin -- Ignore unavailable to you. Want to Upgrade?

To: Tenchusatsu who wrote (29702)	9/16/1999 4:05:00 PM
From: dumbmoney	Read Replies (1) \| Respond to of 93625

Seems like virtual channels allow you to gain the benefits of keeping pages open without actually having to keep the pages open (and risk the latency penalty due to precharging). Correct. ESDRAM did that too, but VC is much more flexible. This would benefit low-to-mid-range desktop systems. (But it won't benefit servers because they have no need to keep pages open in the first place.) Why not? I don't think it's as easy to do with Rambus. With SDRAM, a chunk of data usually comes from eight chips simultaneously (or four, or maybe even two), meaning that the row caches can be spread across the eight chips and address any row in any bank. With RDRAM, a chunk of data always comes from one chip at a time, meaning that the row caches must be contained in each chip and can only address rows and banks in that chip alone. Well, they would have to do a full row cache rather than a 1/4 row cache, but otherwise it works. But VCs are useless for memory systems with a large number of banks, such as RDRAM. I wouldn't say useless, just less useful. And since Rambus is talking about reducing the number of banks in the next spin...