Originally posted by: biostud
Originally posted by: CraigRT
Originally posted by: n7
It won't.
Sure, performance will be improved, but it will be at high prices, with little motherboard selection.
After AM2 has matured, i'll get more interested.
Agree completely.
me2, rumors also has it that the shift for DDR-2 will be rather short and probably with 18 months after the launch of AM2 they will shift to DDR-3.
Let me start a rumor.
The next socket after AM2 will support, through the new Rambus memory controller AMD has licensed, DDR2, DDR3, XDR, and a few other memory formats, and will only need the physical connects on the motherboards to be different. Same as when Intel's old chipsets used to support SDR, DDR, and RDR.
Lets look at history. Going from 266 to 333mhz fsb on Athlon xp, no difference. Going from 333 to 400mhz fsb on athlon xp, no difference. Going from 400 to 533mhz fsb on P4, no difference. Going from 533 to 800mhz fsb on p4, some difference. Going from 800 to 1066mhz fsb on p4, no difference. Going from 600HTT to 800HTT on Athlon 64, no difference. Going from 800HTT to 1000HTT on Athlon 64, no difference.
Going from DDR to DDR2 offered no performance improvement. Going from single to dual channel on athlon 64 offered no performance improvement.
Going from socket 754/940 to 939 offered no tangible improvement on a clock for clock basis.
Based on history, there is absolutely no way we could question your logic that 333fsb(the athlon 64 has no fsb) and ddr2 667 will improve performance of the Athlon 64 by a large margin.
WTF! Most of those had large increases, usually around 5% - 10% increase. A 2.4ghz 800fsb P4 can often outperform a 3.06ghz 533fsb. The jump to 1066mhz was a smaller performance increase, from 1% to 3%. The HTT was about a 1% to 2% increase.
Dual channel was around 5% to 10%.
Each increase may be small on their own, but they add up fast, especially given that the cpu industry only doubles in performance about every 2 years.
DDR2 will ultimately be a 5% to 10% increase too, though overclocked DDR will close or eliminate that gap. However, DDR2 will be cheaper, and won't have crazy limitations like dropping to 333mhz because you used too many sticks. The industry did not decide for DDR to last this long and AMD continually has to tweak their memory controller because they're hitting the limits of the DDR spec. For most users it's not a big deal, but high end users, such as servers, workstations, and gamers who spend thousands of dollars on FX cpus, are being hit by it, and that's the reason why the Opterons and the FX cpus get the tweaks first before the rest of the line.
That said, if I had a 939 system, I wouldn't be upgrading to AM2. However, I'm still on socket A, and AM2 presents a nice way for me to ditch all my legacy hardware. If I was on socket 754.... there's a bit more leeway since the rest of the hardware isn't as out of date a 939 upgrade may be reasonable. In my case, I'm going to have to be buying new everything anyhow no matter what platform I go to, so I may as well get the most up to date. (though 65nm AM2 chips could be a good reason to go AM2)