On Wed, 2003-04-02 at 09:44, Burke, Thomas G. wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > I have seen tests results (from 3rd parties) that seem to indicate > that DDR SDRAM is faster than RIMMs in many (if not most) > applications. This is just because of the way data flows through > them, & so on. > > Also, I used to have some of the original RDRAM whitepapers. From > what I could tell of them, their data flow amounts to a pipeline. If > you're working on large chunks of memory, then they're great, but > their performance falls off rapidly if you're working on many small > chunks of memory, as you have to keep refilling the pipe.
The reports I've seen have flip-flopped. The last one I checked on www.tomshardware.com a few months ago indicated that it depended more on the motherboard than anything else and seemed to indicate that given the best mobos for both types of memory, Rambus came out ahead. That being said, I had a PIII 700 with 128MB PC800 (Intel 820) that ran circles around far "faster" systems with twice the memory. But that's just anecdotal evidence. The only reason I switched was because when it came time to add more RAM, I realized that for another $150 I could get an Athlon 1700+ with 256MB DDR. That was around a year ago and prices on Rambus have dropped considerably since then (although they are still higher than DDR). All in all, I doubt anyone would notice any performance difference between the two, all else being equal (except in benchmarks, which are usually worth what they are printed on). However, I also suspect that due to the heavy demand for DDR right now that QA has slipped a bit and you'll be more likely to get properly functioning Rambus than DDR. I've never seen a bad RIMM. I've seen several bad DDR DIMMS. Some of them from top-name companies. One failed on me after being in use for over 9 months (it suddenly turned into a 128MB instead of a 256 and took a chunk of my FS with it). But, as always, YMMV. -- Cliff Wells, Software Engineer Logiplex Corporation (www.logiplex.net) (503) 978-6726 x308 (800) 735-0555 x308 -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
