X41 Memory speed problem (Pic)

X2/X3/X4x series specific matters only
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nicko029
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Joined: Mon Dec 10, 2007 7:36 am
Location: Croatia, Zagreb

X41 Memory speed problem (Pic)

#1 Post by nicko029 » Mon Dec 10, 2007 10:15 am

Hi,
I have Thinkpad X41 (1.5GHz, 2x512mb ram...) and ram runs at only 200mhz speed!!!

I checked it with cpu-z. I took out the other 512mb stick, but nothing is changed.

Cpu-Z shows 100mhz (200mhz effectively) at memory tab and I have no idea how to make it work at 400mhz.

So, I need suggestions :)

Thx!

weepy
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#2 Post by weepy » Fri Jan 18, 2008 3:12 pm

I would try some other detection / benchmark software like sandra or everest. Cpu-z worked for me always but just in case..

When comparing your benchmark results with the result database, remember the restrictions of 100Mhz (x4) front side bus.
lenovo X41t [ Pentium M 1.6 | 2 GB RAM | 915GM, GMA900 128 MB | 12" IPS tablet LCD | 16 GB CF SSD]
I've got heatpipe here, i've got heatpipe there 'n' I've got heatpipe everywhere...

nicko029
Posts: 7
Joined: Mon Dec 10, 2007 7:36 am
Location: Croatia, Zagreb

#3 Post by nicko029 » Fri Jan 18, 2008 5:36 pm

Here's my results from Everest:

Image

I'm confused now :o At which frequency memory works??

And on my desktop computer Memory tab on cpu-z and everest looks like this:

Image

MOD EDIT: Picture warning added.

weepy
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Location: Prague, Czech Republic

#4 Post by weepy » Fri Jan 18, 2008 6:41 pm

im confused, too :)..

Cpu-z and everest disagree on fsb:ram ratio, but in a way, they are telling the same or similar things. The problem is, that fsb is quad pumped and ddr2 is quad pumped, too (thats why it eats less power and has bigger latency). But still it is double data rate, memory controller and dram communicate on double pumped bus that has to compensate this by ticking on twice the frequency. So its a mess.

(edit: the source of confusion is probably Cpu-z that reports mem bus speed for the desktop and memory core speed for the x41)

I would say, that you have ddr400 dual channel, that has some wasted bandwidth because of the low fsb of 400 MHz.

When looking at the measured throughput, i would be satisfied, since 3200MB/s is the theoretical maximum here (3200MB/s for FSB400 qp, right?), no matter if DDR400 single, DDR200 dual or DDR400 dual -- notice, that the chipset interered by putting the video buffer on the screen while benchmarking (assuming integrated graphics), so it is more distant from the maximum than for example my dual ddr400 @ athlon x2 3800+ (6100 vs 6400MBps theoretical max).
lenovo X41t [ Pentium M 1.6 | 2 GB RAM | 915GM, GMA900 128 MB | 12" IPS tablet LCD | 16 GB CF SSD]
I've got heatpipe here, i've got heatpipe there 'n' I've got heatpipe everywhere...

nicko029
Posts: 7
Joined: Mon Dec 10, 2007 7:36 am
Location: Croatia, Zagreb

#5 Post by nicko029 » Sat Jan 19, 2008 5:06 am

Thank you very much weepy!

Probably cpu-z is messing things up :D

Thank you for your help!

weepy
Sophomore Member
Posts: 152
Joined: Wed Jan 16, 2008 3:50 am
Location: Prague, Czech Republic

#6 Post by weepy » Sat Jan 19, 2008 1:57 pm

glad to help :)
lenovo X41t [ Pentium M 1.6 | 2 GB RAM | 915GM, GMA900 128 MB | 12" IPS tablet LCD | 16 GB CF SSD]
I've got heatpipe here, i've got heatpipe there 'n' I've got heatpipe everywhere...

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