Dell N5040 CPU and memory upgrade - compatibility issues?

Venderbender

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I have a Dell Inspiron 15 – N5040 laptop that I’m looking to upgrade with an Intel Core i5-560M (SLBTS 2.66GHz 533MHz Socket G1) and to upgrade the memory from 1x4GB to 2x4GB.

My laptop specs according to Speccy are:

CPU: Intel Core i3 380M @2.53Ghz - socket 989 rPGA (which I believe is the G1 socket, and rated at 35w same as the i5-560M I'm looking to get)

Memory: 4.00GB Single-Channel DDR3 @ 531MHz (7-7-7-20) - Max Bandwidth PC3-10700 (667 MHz)

Motherboard
Manufacturer Dell Inc.
Model 024DTD (CPU 1)
Version A02
Chipset Vendor Intel
Chipset Model Havendale/Clarkdale Host Bridge
Chipset Revision 02
Southbridge Vendor Intel
Southbridge Model HM57
Southbridge Revision 05


http://ark.intel.com/products/49653/Intel-Core-i5-560M-Processor-3M-Cache-2_66-GHz

The link above states that the compatible memory types with the i5 are DDR3-800/1066. I’m confused as to what this means. For instance, should I get DDR3 1066 (PC3 8500) or DDR3 1333 (PC3 10600) or DDR3 1333 (PC3 10666)???

According to Speccy only one of my 2 memory slots is being used so I’d either buy another 4GB stick at the same speed as the one currently in there (DDR3-1333 - PC3-10600) or buy two 4GB sticks of DDR3 1600 (PC3 12800).

I read somewhere else that my laptop can use DDR3 1600 (PC3 12800), which I would prefer to buy, just to get the extra little speed.

I’m also considering buying a 120-256GB SSD, but I’m assuming there won’t be any compatibility issues, only speed issues since my current HDD is SATA II and I’ll probably end up getting a Samsung 840EVO SATA III SSD.

I’m a noob when it comes to laptops and I’ve only just built my first (desktop) gaming rig about a year ago, so any help would be appreciated.
 
Solution
From what I have heard, it is not worth the hassle to replace a laptop CPU, though RAM and an SSD should help. No processor from the series should have better graphics and the difference between the two chips is minimal and mostly in unlocked features. There is also the chance that the new chip will be too much for the cooling system.

Venderbender

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Nov 11, 2014
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I currently have one no name 4GB stick so I was thinking of replacing it and getting 2x4GB
 

CRITICALThinker

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From what I have heard, it is not worth the hassle to replace a laptop CPU, though RAM and an SSD should help. No processor from the series should have better graphics and the difference between the two chips is minimal and mostly in unlocked features. There is also the chance that the new chip will be too much for the cooling system.
 
Solution