M765s-W CPU Upgrade

A few months ago I purchased a secondhand LogiQ M765s-W laptop, and after searching the web, discovered that it is a re-branded Clevo, in fact the spec of this machine seems identical to the Clevo M765S Model “B” with the SIS 672+SIS968 chipset.
This was a fairly basic laptop with a 1.73Ghz Celeron CPU, 1Gb DDR2 and onboard graphics but what appealed apart from the price, was the upgradability, and as I am not a gamer, the lack of a powerful graphics card does not bother me, whereas the possibility of upgrading the CPU for video editing was a bonus.

So I have now added an extra 2Gb of DDR2 memory, and swopped the original Celeron 530 1.73Ghz CPU with a Core 2 Duo T8300 2.4Ghz

The swap was an easy one on this very accessible chassis, but a couple of anomolies concern me... In CPU-z 153 the multiplier of this CPU is showing as 6X instead of 12X, and the corresponding speed as 1199.9Mhz rather than 2440Mhz.
The CPU is no longer displayed in System Properties (Win XP) whereas the Celeron was.

However, the correct CPU properties are displayed in Everest and SiSoft Sandra... and I am pretty sure the CPU is running at the correct speed, as rendering a test video from AVI to Mpeg 2 has given the expected increase in speed, ie. using Premiere Pro. the time to render a 12min clip was 8min - 10secs with the Celeron, and 4min - 35secs with the T8300
Also, rendering the same clip in TMPGenc, the Celeron took 40mins, and the T8300 27mins - 46secs

The CPU runs cooler at idle and using light apps, ie. 31/31deg. but gets hotter than I thought it may under load, ie, 49/51deg., as hot as the Celeron with the 65nm die used to get to under load, though I appreciate that the thermal compound needs time to cure... I used Antec Formula 5 Silver, which I believe is re-branded Arctic Silver 5.

Any comments on the CPU-z reading would be appreciated.

Alan.

 

For the CPU-Z reading, if you have nothing else running at the time, it may just be Speedstep kicking in, which lowers the multiplier to 6x in order to save power when the processor is idling. The T8300 is rated at 35 watts TDP, while the Celeron 530 is rated at 27 watts TDP, so, given those numbers, the T8300 should, in point of fact, be running hotter than the Celeron at full load.

 

yep, i vote for speedstep also, that would explain why you're reading lower multipliers and clock rates

you could try playing around with RMclock to setup how you want speedstep to behave in specific situations and also to undervolt your cpu to reach lower temperatures at full load

 

You guys were right on the button... thank you.

I installed RMclock and sure enough, as soon as I applied load, the multiplier increased to 12X and 2399.9Mhz, even opening an app such as Word increased the clock to maximum briefly.

I noticed in the compatibility list for RMclock, that there is no mention of the Penryn family of CPUs... the "Throttling" section of "Advanced CPU Settings" is greyed out, and the app does not recognise my chipset.
However, all other features are available, so I may experiment with lower voltage when I learn how to use this app

I felt sure the CPU was delivering when it needed to, as this budget laptop now renders video faster than my old desktop P4 Prescott 3.2, which is o/clocked to 4.5Ghz

I didn't think about the higher wattage of the T8300 compared to the Celeron. I chose the T8300 over the T7800 as that one has the larger 65nm die, whereas the T8300 has the 45nm die which should help battery life, and I thought may run cooler than that one.
I could have fitted the T9500 as that CPU is the fasted compatible with this laptop, but they are still a bit expensive for my pocket, and this T8300 came along at a very favourable price.


Do you think my temperatures are too high at 49/51deg when working fairly hard ?... I may have to read Soviet Sunrise's excellent cooling tips post again, and perhaps incorporate some of those modifications.

Many thanks again for your helpful replies.

Alan.

 

No, 49-51 degrees Celsius under load is a perfectly respectable and cool temperature. I wouldn't worry until you start seeing 80 degrees Celsius and up, although even then, it's more of a "wonder what's going on" level, as most CPUs are rated to at least 90 degrees Celsius or higher (depends on the specific chip, I want to say the cutoff for your T8300 is probably 100-105 degrees Celsius, but I'm too lazy to try to look it up right now >.> ).

 

Wow ! you are right Judicator... the spec sheet gives 105 degrees C. as max.

I stressed the CPU with Orthos a couple of times for 40 mins per test last night, and the maximum it reached was 57/59deg C., but as the max while rendering video is approx 49/51deg C. I will stop worrying now.

I don't think so my friend, you took the trouble to read my post and answer what must be fairly basic questions to you guys... thanks for putting me straight.


Alan