most knowledgeable/best place to buy RDRAM???

[jeff2100]

I need to find two 256 MB sticks of low density PC800 RDRAM which will work in my year-old Tyan Thunder i840 motherboard. I have 2 existing Kingston KVR800X18-16/256 256 MB modules which work, but I want to upgrade from 512 total to 1 GB total and the working modules have been discontinued. I bought two KVR800X18/256 higher density modules and they didn't work at all (alone or with the existing double sided low density KVR800X18-16/256 modules.)

Does anyone have advice on low density 256 MB PC800 modules which would be compatible with the existing KVR800X18-16/256 modules? Kingston was unable to offer a recommendation since these were discountinued on what to buy to work with them.

Alternately, does anyone have a recommendation on where I should try to purchase a compatible module from - either a store which really knows their RDRAM and could offer advice and/or a store which would let me purchase and try a couple modules with a liberal or low cost return pollicy.

Thanks in advance.

 

[microAmp]

I tried Crucial and no go....

 

[RanDum72]

tried Crucial and no go

Crucial doesn't even sell RDRAM.

Jeff2100, I'm currently selling some RDRAM. Check your PM.

 

[andrey]

Talk or e-mail to Mushkin (http://www.mushkin.com). If they dont' have the RAM which you're looking for, they'll be more than glad to tell you where you can buy one.

--Andrey

 

[Viper96720]

Kingston has the 512mb version of the memory your using expensive though. KVR800X18-16/512. Newegg has some simpletech memory that should work. Memory Page
This is the model# RB800X18-16/256 available at newegg $113

 

[jeff2100]

I don't really understand the density issue at all, but I was under the assumption that the 512 MB Kingston module would not work - Based on what Tyan said, I thought the -16 was the number of chips on the module, so 512/16 would be twice as high of a density as 256/16 and thus not work. This could well be way off the mark, and if so I would really appreciate if someone could explain exactly what the -16 means and the density issue at play here.

 

[jeff2100]

That simpletech module might be perfect and newegg is a great store to deal with - I think I might give that a try as it looks like the right module.

Thanks!

 

[jeff2100]

OK - I obviously don't understand the density number.

Does anyone know exactly what the -16 means in the Kingston modules that work?

For example, the description for the SimpleTech Model# RB800X18-16/256 says:

184Pin RDRAM Rambus 800MHz, 40ns, 256MB with ECC, 8 Chip tRAC, 8 Layer PCB. (Compatible with INTEL D850EM series, ASUS P4T533 series, IWILL P4R533 series, Dell 8200 series and many others that require 40ns!) Backwards compatible with slower 45ns Rambus. Model# RB800X18-16/256

SO what exactly does the -16 density number that I need refer to?