memory timings and bus speed

Can someone explain this to me?

I have an Intel core-2 duo system and I just installed 2GBs of PC4200,
533Mhz memory which (supposedly) has the following timings: 3-3-3-8.

When I checked cpu-z, it shows me three columns as follows:

Freq: Timings

1. 200Mhz: 3-3-3-8

2. 266Mhz: 4-4-4-11

3. 266Mhz: 5-4-4-11


My FSB is 266mhz (quad pumped to 1064Mhz).

So I'm confused as to what memory timings my system is actually
using. I suspect that since my FSB is 266mhz, I'm getting the slower
of the memory timings (2 or 3) but which one?

And why bother to claim that the timings are 3-3-3-8 if this is only
correct at 200Mhz FSB, when my FSB does not run at this speed?

Thanks very much for any information.

On May 19, 1:09 pm, BobKK47 <b...@uplink.net> wrote:
> Can someone explain this to me?
>
> I have an Intel core-2 duo system and I just installed 2GBs of PC4200,
> 533Mhz memory which (supposedly) has the following timings: 3-3-3-8.
>
> When I checked cpu-z, it shows me three columns as follows:
>
> Freq: Timings
>
> 1. 200Mhz: 3-3-3-8
>
> 2. 266Mhz: 4-4-4-11
>
> 3. 266Mhz: 5-4-4-11
>
> My FSB is 266mhz (quad pumped to 1064Mhz).
>
> So I'm confused as to what memory timings my system is actually
> using. I suspect that since my FSB is 266mhz, I'm getting the slower
> of the memory timings (2 or 3) but which one?
>
> And why bother to claim that the timings are 3-3-3-8 if this is only
> correct at 200Mhz FSB, when my FSB does not run at this speed?
>
> Thanks very much for any information.

JUst to clarify, the memory I have is DDR-2 PC2-4200 running@ 533mHZ.

On 19 May 2007 13:09:56 -0700, BobKK47 <bkk@uplink.net>
wrote:

>Can someone explain this to me?
>
>I have an Intel core-2 duo system and I just installed 2GBs of PC4200,
>533Mhz memory which (supposedly) has the following timings: 3-3-3-8.
>
>When I checked cpu-z, it shows me three columns as follows:
>
>Freq: Timings
>
>1. 200Mhz: 3-3-3-8
>
>2. 266Mhz: 4-4-4-11
>
>3. 266Mhz: 5-4-4-11
>

I suspect you are looking at CPU-Z's "SPD" tab.
These are the timings programmed into the EPROM on the
module. It means that if your motherboard bios honors the
SPD-programmed timings then if you were to run at 266MHz by
default, or manually set to it, but the memory timings in
the bios were left to "auto/SPD", then it would use
4-4-4-11. However, some boards will still apply what the
designer intends to retain stability which may be slower
timings. It should never automatically be faster timings.



>
>My FSB is 266mhz (quad pumped to 1064Mhz).
>
>So I'm confused as to what memory timings my system is actually
>using. I suspect that since my FSB is 266mhz, I'm getting the slower
>of the memory timings (2 or 3) but which one?

Look on CPU-Z's "Memory" tab.



>And why bother to claim that the timings are 3-3-3-8 if this is only
>correct at 200Mhz FSB, when my FSB does not run at this speed?
>
>Thanks very much for any information.

On May 19, 6:56 pm, kony <s...@spam.com> wrote:
> On 19 May 2007 13:09:56 -0700, BobKK47 <b...@uplink.net>
> wrote:
>
> >Can someone explain this to me?
>
> >I have an Intel core-2 duo system and I just installed 2GBs of PC4200,
> >533Mhz memory which (supposedly) has the following timings: 3-3-3-8.
>
> >When I checked cpu-z, it shows me three columns as follows:
>
> >Freq: Timings
>
> >1. 200Mhz: 3-3-3-8
>
> >2. 266Mhz: 4-4-4-11
>
> >3. 266Mhz: 5-4-4-11
>
> I suspect you are looking at CPU-Z's "SPD" tab.
> These are the timings programmed into the EPROM on the
> module. It means that if your motherboard bios honors the
> SPD-programmed timings then if you were to run at 266MHz by
> default, or manually set to it, but the memory timings in
> the bios were left to "auto/SPD", then it would use
> 4-4-4-11. However, some boards will still apply what the
> designer intends to retain stability which may be slower
> timings. It should never automatically be faster timings.
>
>
>
> >My FSB is 266mhz (quad pumped to 1064Mhz).
>
> >So I'm confused as to what memory timings my system is actually
> >using. I suspect that since my FSB is 266mhz, I'm getting the slower
> >of the memory timings (2 or 3) but which one?
>
> Look on CPU-Z's "Memory" tab.
>
> >And why bother to claim that the timings are 3-3-3-8 if this is only
> >correct at 200Mhz FSB, when my FSB does not run at this speed?
>
> >Thanks very much for any information.

Kony, thanks for the feedback. When I check the "Memory Tab" in CPU-
Z, the only information it displays is the "Type" (DDR2) and the
"Size" (2048 MBytes). Everything else is greyed out. I have a Dell
system so apparently CPU-Z is not able to access the other data in the
"Timings" Section. Is there any other utility available that might
provide this info?

Thanks again.

On 20 May 2007 09:52:58 -0700, BobKK47 <bkk@uplink.net>
wrote:


>Kony, thanks for the feedback. When I check the "Memory Tab" in CPU-
>Z, the only information it displays is the "Type" (DDR2) and the
>"Size" (2048 MBytes). Everything else is greyed out. I have a Dell
>system so apparently CPU-Z is not able to access the other data in the
>"Timings" Section. Is there any other utility available that might
>provide this info?
>
>Thanks again.


Probably some other utility can, maybe Everest or Sisoft
Sandra.