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To: Amit Patel who wrote (88900)9/25/1999 2:12:00 AM
From: Tony Viola  Read Replies (2) | Respond to of 186894
 
Amit, thread, at the risk of sounding like an overenthusiastic Intel bull that accepts copouts, one of the workarounds in the article doesn't sound too bad (how's that for bet-hedging).

messages.yahoo.com

A number of workarounds have been proposed, according to industry and OEM sources. The most popular suggestion
is that Intel Camino-equipped PCs could still be shipped with a cap covering the third memory slot, preventing OEMs or
users from adding more memory and destroying the stability of the system. However, it was still unclear whether signal
fluctuations in two-slot implementations still existed.


With this scheme, even though one RIMM slot out of three is unusable, you can still get 512 Megabytes in a system...not too shabby for a PC. That's the target for Rambus right now, PCs, not workstations or servers. I'll take 512 MB anyday (well, for the next year or so anyway).

The math: 2 slots X 16 chips/slot X 128 Megabits/chip divided by 8 bits per byte equals 512 Megabytes. ECC memory knocks that back a little. Of course, it says that it was still unclear whether signal
fluctuations in two-slot implementations still existed.


If the signals are ugly enough to cause memory problems, all bets are off. The fact that the article later on says maybe ECC memory only should be used in the time being says something. If the signals are a little ratty, occasional single bit errors may occur, but they are generally correctable by the ECC code logic. Without ECC, "a little ratty" could kill (make the system too unreliable).

Sometimes in the past, radically new technologies have been released in partial configs, with known problems still in the maximum configuration. This gives customers a chance to try out the new technology, while the overall system integrators, Intel and the boxmakers in this case, work out the final bugs.

Hey, I wish the whole thing worked too, but it's not the end of the world (if the two out of three RIMM solution is clean enough).

Tony



To: Amit Patel who wrote (88900)9/27/1999 12:24:00 AM
From: SisterMaryElephant  Read Replies (1) | Respond to of 186894
 
All,

Article : Camino chipset delayed again; workaround proposed in interim
(from Yahoo thread at :
messages.yahoo.com.

<"Top-tier OEMs discovered the problems last week, sources said">

I wonder which OEM(s) found it? Dell is an Intel "ally" but having to rely on sometimes jealous and resentful OEM's ( perhaps CPQ, IBM etc. ) to debug your products seems awfully risky to me. Maybe there is not much of a choice, but I find it interesting how the problem was discovered so close to the time of product release.

SK