hclausen@adspdk.CBMNET (Henrik Clausen) (07/30/90)
>In article <1990Jul27.163118.201@csuf3b.CSUFresno.EDU> johnh@csuf3b.CSUFresno.EDU (John Hamilton) writes: >I can't find 1M x 4 Static Column Mode chips. Does anyone know where >to find these for sale? UniTex has these, at $60 apiece. Snail mail reach them at: Unitex, Inc. 17222, Armstrong Ave. Irvine, CA92714 I've just ordered 16 256K X 4 chips at $14 apiece - I'm a bit concerned about the reliability of the 4M parts yet, I've seen some unpleasent failure rates quoted. Otherwise, I have no connections to this mail order shop. -Henrik -- | Henrik Clausen, Graffiti Data (Fido: 2:230/22.33) | | ...{pyramid|rutgers}!cbmvax!cbmehq!adspdk!hclausen | \_______________AmigaDOS: Amiga's Divine Operating System________________/
mjl@ut-emx.UUCP (mjl) (08/05/90)
In article <hclausen.2049@adspdk.CBMNET> hclausen@adspdk.CBMNET (Henrik Clausen) writes: >>In article <1990Jul27.163118.201@csuf3b.CSUFresno.EDU> johnh@csuf3b.CSUFresno.EDU (John Hamilton) writes: >>I can't find 1M x 4 Static Column Mode chips. Does anyone know where >>to find these for sale? > > UniTex has these, at $60 apiece. Snail mail reach them at: > > Unitex, Inc. > 17222, Armstrong Ave. > Irvine, CA92714 > > I've just ordered 16 256K X 4 chips at $14 apiece - I'm a bit concerned >about the reliability of the 4M parts yet, I've seen some unpleasent failure >rates quoted. > -Henrik Yikes! Can you expand on this? What percentage? If they fail, will they do so right away? Or be more insidious and wait awhile? The 1M x 4 SCRAMS seem to really be the way to go for long term memory upgrade. 6M might not seem so much in a year or two. BTW, who are manufacturing these beasts (1M x 4), anyway? Maurice LeBrun Institute for Fusion Studies mjl@fusion.ph.utexas.edu University of Texas at Austin (proud owner of an Amiga 3000)
hclausen@adspdk.CBMNET (Henrik Clausen) (08/05/90)
>In article <35190@ut-emx.UUCP> mjl@ut-emx.UUCP (mjl) writes: >In article <hclausen.2049@adspdk.CBMNET> hclausen@adspdk.CBMNET (Henrik Clausen) writes: >> I'm a bit concerned about the reliability of the 4M parts yet, >>I've seen some unpleasent failure rates quoted. >Yikes! Can you expand on this? What percentage? If they fail, will >they do so right away? Or be more insidious and wait awhile? It's the soft errors that's the problem. Single bits fail occasionally, but when tested afterwards, they're found to be in full working condition. This is a problem that really surfaced on 64 Kbit chips some years ago. So, the percentage is 100, that is, it can occur in any chip. I won't requote the actual rates, as the source was second or third hand, and even the rates for 1M chips seemed higher than I believe. It was expected in the article that as 4M chips become routine, the failure rates would fall significantly. >The 1M x 4 SCRAMS seem to really be the way to go for long term memory >upgrade. 6M might not seem so much in a year or two. If you run Unix, yes. My needs under Amiga OS probably won't go that far. If you don't need more than 4M of memory today, I see no reason to get 4Mbit parts, as their prices might be cut to half in a year or two. So, it's not only a tech reason to get 256X4 parts today. >BTW, who are manufacturing these beasts (1M x 4), anyway? It's listed in the A3000 intro manual. Toshiba, OKI, Hitatchi, Nec etc. >(proud owner of an Amiga 3000) Ditto! -Henrik -- | Henrik Clausen, Graffiti Data (Fido: 2:230/22.33) | | ...{pyramid|rutgers}!cbmvax!cbmehq!adspdk!hclausen | \__"Do not accept the heart that is the slave to reason" - Qawwali trad__/