Upgrading ASUS Pro72sl notebook with Sis671dx chip

I think the T9400 will work, since it seems it won't be limited by your motherboard's motherboard. The SP9400 uses a different socket and thus may not fit. Would you know where I can find detailed specs of your laptop? A cursory search online revealed nothing, and I'll be able to provide more help if I had access to that.

here are some specs, is this usefull for you r-maniac?
http://tweakers.net/pricewatch/236 [...] l#tab:info

This cpu I would like to install

Intel® Core™2 Duo Mobile Processor SP9400 for 1066 478p



Brand: Original Intel
Model: T9400 (For Intel GM45/47, PM45/47 Socket 1066 478P)
Setp Code: Q4HJ (ES Version at the same original SLB64)
Condition: New (with HeatSink Compounds)
Warranty: DOA 30Days (To OS-Store HK/CN/TW RMA Center)
Specification: Core™2 Duo Mobile Processor SP9400
sSpec Number:
CPU Speed:
PCG:
Bus Speed:
Bus/Core Ratio:
L2 Cache Size:
L2 Cache Speed:
SLB64
2.40 GHz
1066 MHz
9.0
6 MB
2.4 GHz Package Type:
Manufacturing Technology:
Core Stepping:
CPUID String:
Thermal Design Power:
Thermal Specification:
VID Voltage Range:
Micro-FCBGA
45 nm
C0
25W
1.050V-1.150V
Supported Features:
Dual Core
Enhanced Intel Speedstep® Technology
Intel® Virtualization Technology

thank!! I all ready asked the support of ASUS, the only said only the the warranty would not be valid anymore but I will ask again. But thanks again!!
Regards

I have send another mail to ASUS no response
I bought all ready a T9400, which is on its way...I will let you know
regards..