Oh absolutely, the chipset does play a huge role, but I fear we're
going to start running into the limits of the signal traces over the
board itself AND timing issues derived from having two drops on the bus.
On 20 Feb 2008, at 13:33, Greg Sevart wrote:
Oh, the chipset plays a huge role. The communication you speak of is
(largely) regulated the NB in question. An exaggerated (because it
has other
problems) example is the 680i chipset. Even P965's are generally
capable of
running higher FSBs with QC chips than it can. Alternately, you can
look at
the RD600 chipset. It provides special tuning methods of the AGTL+ bus
timings (only Core 2-compatible chipset that can do this as a
tunable option
as I understand), which have a -huge- impact on QC overclockability.
I still intend on getting the Q9450 or Q9550 when they're out, but
probably
won't be able to push it to the "limit" until P45.
Yes, two dies will always limit what FSB you can hit, my argument is
that
given a chip technically able to hit the high FSB, the chipset plays
a very
substantial role. Probably even more important, however, is the
motherboard
itself...but given that P45 should give most makers their second
stab at a
design based on a chipset with native 1600QDR FSB support, I'm
hopeful that
we'll see the best QC OC results yet with it.
Greg
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:hardware-
[EMAIL PROTECTED] On Behalf Of James Boswell
Sent: Wednesday, February 20, 2008 6:16 AM
To: [email protected]
Subject: Re: [H] Need AMD XP Sempron CPU
The issue with the twin-die arrangement on the current intel
quadcores
is that it's not the northbridge that generates the FSB wall, it's
the
blend of both cores and the need for everything to communicate
properly, I've had an E8400 on a 500Mhz FSB (P35 chipset) for a few
weeks now and it's very solid.... but the QC's seem to cap the FSB to
around 460-470 or so.
It's feasible that no chipset will get around that, sadly :/ although
stranger things have happened.
http://chryx.shacknet.nu/wolfdale4250.png
On 20 Feb 2008, at 03:35, Greg Sevart wrote:
I was considering moving to X48 in the coming weeks in anticipation
of a
45nm quad-core upgrade (currently running a 65nm quad-core part at
3.2GHz on
P35), but I think I'm going to hold off on the mobo move until P45.
P45
sports ICH10R, which supposedly has 10GbE, and likely will do a
better job
overclocking the 45nm QC's. It's due out in June.
The real problem is that the new Yorkfield series use a 1333QDR FSB,
meaning
that the multipliers are lower than the current Kentsfield. That
means I'll
need something likely capable of 475MHz+ FSB 24/7...that isn't P35
or X38,
and likely not X48. P45 I think gives me the best chance at a high
FSB to
push to 4GHz. :)
I wouldn't touch 780i with a 20 foot pole.
Greg
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:hardware-
[EMAIL PROTECTED] On Behalf Of j maccraw
Sent: Tuesday, February 19, 2008 7:33 PM
To: [email protected]
Subject: Re: [H] Need AMD XP Sempron CPU
Thanks Duncan but it has to be 3000+ or better, 400Mhz
FSB part. =(
LOL, you BiL is hard-up if he's hoping for charity in
the form of a free 1.2G
T-bird! Hell, I'm only doing replacement here because
the rest of the system
won't carry forward into X48/780i/DDR2/PCI-E land but
is more than usable for
HL2 & farcry the kids want to play.
DHSinclair wrote:
j mccraw,
I have the this for your consideration:
-used-
A1200AMS38
AXIA0108CPiW
95039650014
1999 AMD
Believe it should be an AMD Thunderbird 1.2GHz.
If it will run in your m/b, it's yours....... I'll
deal with my B-i-L
who seems to
think he is going to get it someday out of family
gratis.
Best,
Duncan
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