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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: Ali Chen who wrote (78499)	11/3/1999 2:34:00 PM
From: Charles R	Respond to of 1575428

Ali, <When people talk about "pricey Rambus memory", I hear it as "pricey RIMMs". The chips themselves may be not too much above core DRAMs (plus royalities, plus extra silicon area for controller). The RIMMs, however, must be manufactured with trace delays matched down to 5ps in propagation time, as per their design reference p4-10. With 170ps/inch and 4" long, it means the thickness uniformity and trace etch must be accurate to better than 0.5% each. Add uncertainties in top coating, variability in soldering, etc... and you may come to some idea as what might it cost to make "compatible" RIMMs.> I agree with the analysis in general. One place where RDRAM costs will drop closer to a SDRAM is when the DRAM is soldered onto the motherboard without providing any expansion memory sockets - A sealed PC/gamebox with everything soldered in and comes with 32 or 64 MB of memory. I think RDRAM can be really good in this space. Chuck