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a QUICK am2 vs conroe vs 805 question.

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May 30, 2006 8:48:31 AM

OK, so in the pentD 805 thread, someone posted this:
http://www.pctuner.net/php/Articoli/Articolo.php?PAG=5&...
in short, a pentium D 805 at 7.1GHz (20*355) got a 1M superPI score of 18.859 seconds.

on the sticky post about the Conroe benchmarks, is this:
Quote:
New May 28, 2006 Records: TAM is about to break 5GHZ!!!!
SuperPi_1M: 10.312 seconds on a Conroe E6800 @ 4.99GHz
Link: http://www.xtremesystems.org/forums/showpost.php?p=1478...

in short, a Conroe at 5GHz got a 1M superPI score of 10.312 seconds.
(presumably making the conroe (18.859/10.312) * (7.1/4.99) = 2.6 times better (clock for clock) than the pent D 805. never mind whether those numbers hold up in real life, it just proves that Netburst is shit, which we all knew anyway.

but just go back to that link.
http://www.xtremesystems.org/forums/showpost.php?p=1478...
does anyone notice anything screwy about it? namely the MEMORY TIMINGS OF 4-3-3-2, @ FSB=416MHz!!!

now, forgive my ignorance. i run a pentium3, and all i know is that my SDRAM runs 100MHz at 2-2-2, or 133MHz at 3-3-3. and i've never played around with anything newer (at least, not inside the case)
but i'm a wholesale dealer, and i know is that ddr2-800 4-4-4-12 (corsair twinx 2*1gb) costs au$400, and timings can get as good as 2-2-2-5 (albeit on ddr1, eg corsair twinx, 2*512mb for au$270).

but what RAM, DDR1, DDR2, DDR3, FBDIMM, ZRAM or otherwise, can do 4-3-3-2???
and most of the other ones on that page say similar, some 4-3-3-1.

so, to the crux of this thread.
1) are these photos doctored?
2) if not, is there a "cpu-z verified" page that says anything to back them up?
3) if the RAM does exist, what is it, where can i get it, and how much?
4) if not, what's the best "cpu-z verified" data anyone can give?

and to the AM2 vs part of this thread.
5) what's the best superPI anyone's got out of an AM2 system? (preferably "cpu-z verified", i don't care about what processor or system)

ps, i'm considering whether to buy a stopgap 805 now, just to play around with for a few months, or stick with my p3 for the time being, seeing as it does all i want anyway.
i'll be making my decision on whether to buy an AM2 or conroe sometime After August.

pps, no fanboys of either type welcome in this thread. well, you can reply, as long as it's sensible and answers what i asked. just don't act like a fanboy.

ppps, i don't mean to take away from anyone else's am2 vs conroe threads, i just want these questions answered without starting an arguement, then i'll ask a mod to lock it when i'm satisfied.

cheers
Dr Croubie.
May 30, 2006 9:09:13 AM

Quote:
but what RAM, DDR1, DDR2, DDR3, FBDIMM, ZRAM or otherwise, can do 4-3-3-2???
and most of the other ones on that page say similar, some 4-3-3-1.


You are slightly slow in terms of memory technology. Corsair has low latency DDR2 modules that can do 3-3-3-11 timings at DDR2-800. Link: http://www.anandtech.com/memory/showdoc.aspx?i=2732&p=4

It can reach 4-4-5-14 at DDR2-1066. So yea, there's your answer.



For SuperPI performance, Pentium M/Core Duo/Core 2 Duo is in their own league. Nothing really compares clock for clock. For other apps its different. That's why its not really a good benchmark to see overall performance.

1.66GHz Core Duo is noticeably faster than Pentium D 805, which is 2.66GHz/533MHz FSB

Core 2 Duo is around 25-35% faster than Core Duo at same clock.
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May 30, 2006 9:42:47 AM

Quote:

5) what's the best superPI anyone's got out of an AM2 system? (preferably "cpu-z verified", i don't care about what processor or system)


Not sure about AM2, but here's a thread with all the records.

Note: the 1m for Intel aren't up to date yet.

http://www.xtremesystems.org/forums/showthread.php?t=59...
May 30, 2006 12:40:09 PM

Quote:
um, clicky linky
http://www.iamxtreme.net/coolaler/WR/4470_1M.gif
4-3-3-1 @ 447??
not a text typo, an alleged cpu-z screenshot. and not 4-3-3-11 (i'll take your word for it that it exists, and i'll assume it's damn expensive too)


Sigh.. good one. My point was that newer RAM can reach even lower than 4-3-3 but i guess i overlooked the last part.

Anyway, bottom summarizes the insignificance of RAM latency on an Athlon 64 system!!!

http://forums.anandtech.com/messageview.aspx?catid=28&t...
May 30, 2006 7:06:19 PM

Quote:

5) what's the best superPI anyone's got out of an AM2 system? (preferably "cpu-z verified", i don't care about what processor or system)


Not sure about AM2, but here's a thread with all the records.

Note: the 1m for Intel aren't up to date yet.

http://www.xtremesystems.org/forums/showthread.php?t=59...
Thanks a lot for that link :D 
May 30, 2006 10:40:41 PM

Thanks for the links guys.

so anyway, 400 views and only 5 replies, does nobody care that the biggest thing from intel in years may be bullshit?

currently i'm thinking either:
1) the cpu-z screenshot has been doctored (in which case, i'm not going to believe any of the benchmarks)

2) this 4-3-3-1 ram does exist, and costs somewhere more in the vicinity of what NASA can afford, making real-life comparisons to anything pointless.

*sigh* i've been looking forward to conroe, ever since Dothan beat the crap out Netburst a year or so ago. i'd hate it to be ruined by bullshit benchmarks...

(i might PM some regular posters in the conroe thread for answers...)
May 31, 2006 1:53:25 AM

First of all, it's called memory tweaking.

Second, it's because tRAS does not have much to do with memory performance. In fact, setting a tRAS of 1 should not be done, unless you really know what you're doing. tRAS should usually not be set below the sum of AS and tRCD. Why is this? Because tRAS is not a real "latency" setting. It's just the minimum amount of time that a row must remain active before it can before a new one can be activated. Increasing it below an arbitrary point means that it will never be used and have no effect on performance, except causing some things to possibly muck up.


Here's a pic with memset in the picture:

May 31, 2006 6:40:40 AM

Quote:

400 views and only 5 replies, does nobody care that the biggest thing from intel in years may be bullshit?
Quote:


2 things to consider.

1. In your title you say "QUICK" question...Doesn't sound like you want
a big thread to develop.

2. "pps, no fanboys of either type welcome in this thread. well, you can reply, as long as it's sensible and answers what i asked. just don't act like a fanboy". Still doesn't sound like you want many replies, as this is a
Fanboy attracting title.

:wink:
!