Re: OT: CPU compatilbilty ...

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On Jul 9, 11:38 pm, Paul <nos...@xxxxxxxxxx> wrote:
RJK wrote:

Oh my goodness, I've just bought a Stk 775 Intel Pentium Core2 Duo E6300 :-
http://www.cpu-world.com/CPUs/Core_2/Intel-Core%202%20Duo%20E6300%20H...
..and am now confused by fsb frequencies, above specs. indicate that fsb on
board needs to be 266mhz, and then something gets quad-pumped up to 1066 !
...now does that mean that my lowly 4x512mb Corsair PC3200 will actually be
running at 133mhz/(266ddr),,,, and then it gets quad-pumped, or is the
actual frequency on the board 266mhz, and if so will my 4 old sticks of
ddr400/200mhz actual mhz, be able to cope ?

...haven't tried to fit cpu yet, it hasn't arrived yet, and haven't checked
bios revision you, ..mind you that'll be hard 'cause there's no cpu in it
atm !

regards, Richard

The Conroe865PE manual says at FSB1066, the memory runs at DDR400.
By my math, I'd expect DDR354 (1066/800 * DDR266). Once you get
it running, you can use CPUZ to see what actually happened, and
whether the ratio is actually available to make it run at
exactly DDR400.

If you didn't keep track of the BIOS release, you'd just going
to have to give it a try. There are two different E6300 running
at 1.86GHz in the Asrock CPU table, each with a different minimum
BIOS release. (Check the top of the BIOS chip for a sticker. The
original release number may be noted there. If you've flashed
it, it would likely be at some higher release now.)

If it won't POST, then either you could use badflash.com or a similar
site, and purchase a replacement BIOS chip and plug that in. Or,
you could purchase a Celeron LGA775 of some sort, as a temporary
processor to use while you flash the BIOS to the latest release.
Then plug in the E6300. So there are a couple ways to update
the BIOS. And the badflash.com option, is only viable if the
BIOS chip is sitting in a socket and is removable. If the BIOS
chip is soldered to the motherboard, then replacing the chip
would require soldering skills. So the "cheap Celeron" for
flashing, is the safer alternative.

    Paul- Hide quoted text -

- Show quoted text -


Many thanks again Paul,

Earlier today E6300-1.86ghz cpu arrived and I fitted it Conroe865pe
motherboard - to see what would happen ! ...Conroe865pe bios is v1.7
btw.
At boot, bios reported a 1.4ghz cpu, not the actual 1.86ghz.0.065
micron model that it is. So after playing with bios settings and
tweaking them several times. At one point, (perhaps stupidly), I set
the jumper "FSB1" motherboard jumper from short pins 1&2 (FSB
533/800mhz) to short pins 2&3 to select (FSB 1066mhz), and things went
steadily downhill, until it would not even boot to bios screen. I
even began suspecting that something had died, perhaps even AGP
card ! Even after clearing CMOS settings, ...still no sign of a bios
screen !

Suspecting that bios could not cope with E6300, even after clearing
CMOS, and that I would have to get a Pentium D (800mhz fsb) cpu back
in there to recover, I rummaged on ebay and just bought a Skt. 775 D
930 !
Then I sat for a while and pondered on having to wait for a day or so
for it to arrive by post, and just for something to do, I fitted the D
820 from a friends PC, (that I was sure had died - mentioned earlier
in this thread), and just before fitting it I gave that "dead" D 820
underside gold contacts a gentle wipe with a piece of black cotton,
(something of course one would never normally do), and was astonished
to notice a faint white residue came off onto the cloth !!! Now,
whilst working on the "friends" PC mentioned earlier, I had noticed
that a white coloured h/s compound had been carelessly, nay, slapdash-
edly - smeared onto to cpu lid - on top of previous "grey" coloured
heatsink compound that had obviously not been cleaned off. ...anyhow,
IT BOOTED UP without a glitch ! Now, whether that electrically
"insulating" effect of a very thin residue of heatsink compound had
been applied intentionally, or just carelessly, I suppose I'll never
know ! However, it means that I'm left in the annoying position of
knowing that I've lost my beloved D 935 cpu into a friends PC, and
I've bought an E6300 that I don't know how to get running properly,
and I've just bought a D 930 that I possibly don't need ! Or should
I console myself that the D 930 from ebay, that hasn't yet arrived
yet, has "Enhanced SpeedStep technology" on it, but the D 820 from my
friends PC does not !

I digress again !

Now that I’ve been able to get my 2nd PC up and running again with
that D 820 in it, how do I prepare it for a E6300 ?
During my earlier failed attempts, the “Auto” fsb setting, in bios,
was showing a greyed out “266,” and the bios label for that setting
was “Actual FSB” so was this far too high for the ddr400/pc3200
modules (200mhz actual/on board) currently on the board ?
Do I really need to set that “FSB1” jumper to 1066mhz – and then
perhaps change that “Auto” fsb setting in bios to “Manual” so that I
can wind it back down from 266mhz to, say, 200mhz ?
Is there a PC-???? Model of 184 pin memory that actually runs at
266mhz ?

I don’t understand why the Conroe865pe motherboard manual says that I
must have DDR400 modules fitted, (which I have), in order to use the
1066mhz (overclock) function, when the bios Auto-detects the cpu fsb
as 1066 and sets a board fsb frequency of 266mhz – which must be too
high for the pc3200/ddr400 – 200mhz-on board, …modules ? !

…phew, ..about to rummage in Conroe bios again, and maybe refit
E6300 !

regards, Richard























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