Mac_MatrixForum
Posts: 295
Joined: 4/11/2000 From: Espoo, Finland Status: offline
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[QUOTE]Originally posted by Ian Packham [B]I must be getting confused, I thought Prescott was 64bit and was Intel's answer to the Athlon 64 and G5? [/B][/QUOTE] It's still an answer, but (only) 32 bit. It's not like the upcoming Apple G5 actually beats the current P4s or Athlons. Madison is the upcoming 64 bit Itanium and Deerfield is supposed to be a lower cost version of that. They wont be intended for desktops (former for heavy duty, latter for workstations). Athlon 64 however is intended for desktops (the already released Opteron for servers and workstations). [QUOTE][B] Reading the article again it looks like Prescott has 64bit extensions (Yamhill) which will be unlocked later. Its all a bit confusing to me. How can a 32bit processor handle 64bit instructions?[/B][/QUOTE] Theoretically speaking this (putting stuff that will be unlocked later) is possible but in practice it's rarely smart to add millions and millions of useless transistors to already huge silicon isn't it? That's most likely just crazy gossip. They sort of did that with Hyperthreading but we are talking about doubling a lot of stuff and it's not cheap. Intel doesn't think we need 32 bits now and for common desktops it's hardly a requirement for a couple years even if Athlon 64 works well as a catalyst. [QUOTE][B]Is the Athlon 64 also 32bit? [/B][/QUOTE] No, it is 64 bit but unlike for example the Intel Itanium it can run 32 bit applications natively at full speed. Therefore you do not have to get new applications. When 64 bit applications arrive you will slowly transfer to them for further increased performance and of course you can add more than 4 gigabytes of memory easily (there are uses for that) if you have a 64 bit OS installed.
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Markku "Macroz" Rontu "Understanding is a three-edged sword, your side, their side and the truth." - Captain John J. Sheridan, Babylon 5
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