T7500 v. P9500

First of all, before I go any further... are these two processors interchangeable?

My Latitude D830 currently has a T7500 CPU, but I am beginning to consider upgrading it to something a bit faster. The P9500 caught my eye due to its faster clock speed, increased FSB and L2 cache... then I say that it uses 25w - 10w less than the T7500?!?!

Ok, so how much would I notice the 10w savings under normal computing conditions?

Any and all info that you can provide about the comparison of these two CPU's would be greatly appreciated.

Thanks!!

 

There is a nice performance boost and nice savings between the two, but I highly doubt you can do this upgrade.
If you want the performance, get T9300
Power savings - Between T9400 (35W) and P9500 (25W)

 

Why don't you think I could do the upgrade? They are both socket P, correct?

Thanks for the quick response!

 

The comparison is pointless, as the Penryn-Refresh Series is incompatible with the Santa Rosa Platform (GL960; GM/PM965).

The best processor you can upgrade to are the X9000; T9500; T9300; T8300; X7900....and a few more.

 

The processors may be physically interchangeable, but they aren't exactly compatible. What would happen is that it probably would fit, but because your computer has the Santa Rosa chipset, the FSB on the P9500 would be downclocked from 1066 to 800 MHz - a 25% decrease. This 25% decrease would be reflected in the processor clock speed, so instead of a 2.53 GHz processor you'd have a 1.90 GHz processor, and a performance decrease. So you definitely do not want to do this "upgrade".

For power savings, I'd recommend undervolting. flipfire has an undervolting guide that's quite good, and you can get some pretty good savings on the T7500. The relationship between voltage and power usage is quadratic, so a 15% voltage reduction at the highest frequencies will result in the same power drop (28%) as you'd get from going to a P-serie processor. You may or may not be able to get that much of a reduction, but you probably will be able to drop power consumption by 10% at least - I've reduced mine by 13% and haven't even pushed it.

Also note that that 35W is peak power consumption - most of the time it's using far less than that. The P-serie probably uses a bit less power at the low end of the spectrum, too, but you can get the T7500 pretty low, especially with both undervolting and underclocking (Super Low Frequency Mode at 600 MHz with the minimum 0.85 voltage). The power savings from either undervolting/underclocking or going P-serie won't be night and day, but probably will be noticeable - I get about half an hour extra battery life with undervolting and underclocking.

For performance, the T9500 is the best option (2.6 GHz, 800 MHz, 6 MB), but the T9300 is a much more economical option for nearly the same performance (2.5 GHz, 800 MHz, 6 MB). The Extremes (X9000, X7900 at 2.8 GHz - but not X9100) probably would work as well, but would consume more power and generate more heat, and may not be BIOS-supported, though I don't believe that would prevent them from working.

 

Yes, it will definitely not be supported by the BIOS. I've seen a M1330, and a D630 user report failed upgrades to the P9500/T9400.

 

andy is right,you cant use p9500-i would suggest you to go with t9300-it is the bbb at this moment

 

Alright, thanks guys. I probably wont upgrade to anything now. I was primarily looking for a wattage savings along with a bit of a boost.

Thanks for all the responses!!!