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

To: Bilow who wrote (30675)	9/25/1999 11:04:00 PM
From: long-gone	Read Replies (1) \| Respond to of 93625

<<At least all that gold plate will provide relatively high scrap values. >> And only going up.

To: Bilow who wrote (30675)	9/26/1999 9:40:00 AM
From: John Walliker	Read Replies (1) \| Respond to of 93625

Carl, I should mention that one of the great advances in socket technology was the addition of double "wipes", or contacts. This way, if one wipe failes, the other still provides electrical contact. My guess is that RDRAM would have trouble working with a pin with only one wipe active, as this does change the impedance of the socket. In addition, oxides are a problem, though INTC has gold plated everything. No need to guess. Just have a look at the Rambus web site and look at rambus.com (You need to agree to their conditions to download or view this file.) You will see that Rambus connectors are tested at 105C for 500 hours and at temperatures ranging from 25 to 65 C at 90% to 95% relative humidity. Special highlights include the nitric acid and sulphur dioxide tests. Don't forget the 50G shock test and the multi-axis vibration tests of 3.13G RMS acceleration power spectral density for 10 minutes per axis and 2.2G RMS for 45 minutes per axis. These acceleration spectral densities refer to the acceleration in each frequency band from 5 to 500 Hz simultaneously. Think of your PC bolted to the back of a pickup truck and driven fast down a rocky track. John

To: Bilow who wrote (30675)	9/27/1999 12:27:00 AM
From: Jdaasoc	Respond to of 93625

Bilow: My Osborne1 had some cadnium alloy on disk drive interface edge connector which included 5 & 12 V supplies lines with logic signals. About every 6 months one would have to go in there and rub with a pencil eraser the oxides off. Then, every thing would work again. I think the RMBS engineers thought they could pull off the idea of RIMM's acting a lot like SIMMs. We now know that the 10cm of memory bus traces on motherboard are probably not realistic for 800 Mhz and above operation. I think Intel will give RMBS another try with redesigned RDRAM, redesigned RIMM and socket or even RIMMless as you suggest. I don't think RIMM socket is big problem. You have to be a real klutz to screw up RAM insertion. I think another problem still not talked about a lot is uBGA packaging of chips. RAM manufacturers seem to differ on techniques that they will use. I am sure several thousand RDRAM computers are probably been running RAM test routines over the weekend and a better idea of signal reliability will be determined very soon. john