Author: Robin Smith
Date: 23:05:10 09/14/01
Go up one level in this thread
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
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