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Politics : Formerly About Advanced Micro Devices
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To: Charles R who wrote (61191)6/9/1999 10:47:00 PM
From: kash johal  Read Replies (2) of 1572643
 
Charles,

Re: "What is your estimate of performance difference (at system level) between 800MHz Rambus DRAM, PC100 and PC133 memories when used in conjunction with Coppermine at 600MHz? I am not looking for precision here but a rough wag."

I have heard and read that 300Mhz RDRAM(or 600 which is the same) is SLOWER than PC 133.

I have also heard that 400Mhz RDRAM(800) is only marginally faster than PC 133 but for things like AGP 4x it does offer somewhat of a bigger boost.

It is NOT clear to me that RDRAM buys anything over PC 133 in terms of SPEC int or FP numbers.

Thats why I have been so critical of RDRAM and Intels descision to embrace it exclusively.

IMHO Coppermine is a great processor as it should SLASH intels costs by 30% over current PIII. And their costs is therefore likely to be in the $40-50 range for a PGA or BGA package.

But they are lumbering it with a more expensive chipset, much more expesive and hard to yield RDRAM.

In fact no-one can even tell us what 256Mb of 800Mhz RDRAM will COST.

It seems like they are fumbling and bumbling ala AMD. In this case the yield/manufacturabilty concern is related to the DRAM manufacturers and MB guys.

And I agree that Cumine will be much lower performance than a K7.

But the additional RAM/MB costs will push the OEMS costs to substantially greater than K7's.

It could be a tough road to hoe!!!

Regards,

Kash
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