Author: Robert Hyatt
Date: 06:28:42 09/15/01
Go up one level in this thread
On September 15, 2001 at 02:05:10, Robin Smith wrote: >On September 14, 2001 at 10:24:40, Robert Hyatt wrote: > >>On September 13, 2001 at 20:57:45, Vincent Diepeveen wrote: >> >>>On September 13, 2001 at 13:04:38, Jonas Cohonas wrote: >>> >>>>On September 13, 2001 at 12:39:15, Vincent Diepeveen wrote: >>>> >>>>>On September 13, 2001 at 10:46:18, Jeremiah Penery wrote: >>>>> >>>>>>On September 13, 2001 at 10:12:22, Vincent Diepeveen wrote: >>>>>> >>>>>>>registered DDR ram is more than double the price you mentionned here. >>>>>>>and needs very long to get delivered. >>>>>> >>>>>>Before posting this crap, check your prices. It's hardly more expensive for the >>>>>>Registered DDR memory than the normal memory, as others have already mentioned. >>>>> >>>>> >>>>>http://www.alternate.nl/cgi-bin/frameset.pm?js=1 >>>>> >>>>>DDR ram, registered 1 gigabyte: 702 euro, euro is not far away from dollar >>>>>right now. 92 dollar cents or similar. >>>>> >>>>>How to get that for $200 ? >>>>> >>>>>Oh perhaps you think alternate is the most expensive shop in netherlands >>>>>(not exactly true it's one of the cheapest). >>>>> >>>>>Let's try another real cheap store in netherlands, who are even slower >>>>>delivering registered DDR ram actually as they initially promised: >>>>> >>>>>Let's also try smaller DIMMS as that's cheaper: >>>>> >>>>>Corsair DDR 256MB PC 2100 Cas 2,5 Reg dutch guilder 359 euro 163 >>>>> >>>>>you need 4 of them. 4x163 = 652 euro. >>>>> >>>>>Who needs to shut up here? >>>> >>>>PQI DDR 256MB PC 2100 costs 429kr which is equvalent to 50$, i don't think that >>>>anyone is questioning the prices you post that is current in the netherlands, >>>>but that does not mean that it is not cheaper elsewhere. >>> >>>Wait a minute. i bet you're not talking about REGISTERED memory but >>>talking about normal DDR ram. >>> >>>That doesn't boot in a tyan motherboard! >>> >>>You need REGISTERED memory! >>> >>>normal DDR ram is NOT registered. >>> >> >> >>Registered simply means certified. Most commonly this has to do with two >>things: speed and contact material. IE if your MB has gold contacts in the >>memory sockets, you need gold contacts on the memory modules. Mixing gold and >>tin/whatever won't work very long. Speed is the other issue. I have seen >>lots of 60ns SDRAM that won't work at speeds faster than 75ns, for example. >>As verified on a memory tester. "registered DDR ram" simply means it has been >>confirmed to work in a particular MB. The inverse is _not_ true. IE that >>non-registered DDR ram will _not_ work in that MB. It might or might not work. > >Bob, are you sure? > >From http://www.crucial.com/support/faq.asp (a memory supplier): > >"What is 'registered SDRAM'? >Registered SDRAM is the SDRAM version of a buffered module. All memory must be >buffered; it is just a question of where the buffering takes place. Buffer logic >chips clean up the signals on a DRAM module. They don't boost the signal, they >just provide a small buffer or cache where data can be held for 1 clock cycle >prior to being written to the DRAM cells. This buffering only takes place on >writes simply because a buffer is not needed when the memory is being read as >the chipset can handle it as fast as it can get it. The term "registered" >reflects the use of a register logic chip rather than a buffer logic chip, and >the registered part is used because a regular buffer logic chip can't keep up >with the speed of 100MHz SDRAM." > >Robin In that case I am not sure. My quad xeon has a list of "registered SDRAM part numbers/vendors" in the Intel docs. It sounds like the "registered" word has been overloaded with the definition you gave. Intel was _very_ specific about part numbers for memory DIMMS for my quad, and they used the certified part numbers in the context of "registered"... which obviously sounds different.
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