memory timings and bus speed

[BobKK47]

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.

 

[BobKK47]

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.

 

[kony]

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.

 

[BobKK47]

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.





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

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.

 

[kony]

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.