Laptop upgrading parts

[kujoe2002]

So I have a DELL XPS L501X with the generic specs as:
Intel(R) Core(TM) i5 CPU M 480 @ 2.67GHz Arrandale, 4GB of RAM Windows 7 Home Premium 64 bit.

Manufacturer Dell Inc.
Product Name XPS L501X
Version A07
Serial Number GM1N7P1
PC System Type Mobile
Machine Type AT/AT COMPATIBLE

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NVIDIA GeForce GT 420M

Battery
Sensor Value Min Max
Voltages
Current Voltage 12.85 V 12.85 V 12.85 V
Capacities
Designed Capacity 8400 mWh 8400 mWh 8400 mWh
Full Charge Capacity 8202 mWh 8202 mWh 8202 mWh
Current Capacity 8202 mWh 8202 mWh 8202 mWh


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BIOS Top <#TOC>
Property Value
BIOS Vendor Dell Inc.
Serial Number GM1N7P1
BIOS Version A07
BIOS Date 03/29/2011
BIOS Size 2048 KB
BIOS Starting Segment E10Ah
DMI Version 2.6

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CPU Info
Number of Logical Processors 4
Number of Physical Processors 1

CPU #1 Intel Core i5 Top <#TOC>
Property Value
CPU Name Intel(R) Core(TM) i5 CPU M 480 @ 2.67GHz
CPU Code Name Arrandale
Vendor GenuineIntel
Number of Bits 64
Instruction Set MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, ET64, XD,
VMX, EST
Platform Name Socket 1156 LGA
Revision K0
Technology 32 nm
Original Clock 2666 MHz
Original System Clock 133 MHz
Original Multiplier 20.1
CPU Clock 2666 MHz
System Clock 133.0 MHz
QPI Link 2394.4 MHz
Number of Cores 2
Core #1
Speed 1330.2 MHz
Multiplier 10.0
Core #2
Speed 1330.2 MHz
Multiplier 10.0
Virtual Technology Supported Yes
Hyper Threading Supported Yes
Hyper Threading Enabled Yes
Cache
L1 Data Cache 2 x 32 KBytes
L1 Instructions Cache 2 x 32 KBytes
L2 Cache 2 x 256 KBytes
L3 Cache 3072 KBytes


Memory Summary Top <#TOC>
Property Value
Maximum Capacity 8192 MBytes
Memory Slots 2
Error Correction None
DRAM Frequency 532.1 MHz
Memory Timings 7-7-7-20 (CL-RCD-RP-RAS)


Manufacturer Nanya Technology
Part Number NT2GC64B88B0NS-CG
Serial Number 428E2613
Capacity 2048 MBytes
Memory Type DDR3 (PC3-10700)
Speed 667 MHz (DDR3 1333)
Supported Frequencies 381.0 MHz, 457.1 MHz, 533.3 MHz, 609.5 MHz, 685.7
MHz
Memory Timings 5-5-5-14-19 at 381.0 MHz, at 1.5 volts (CL-RCD-RP-RAS-RC)
Memory Timings 6-6-6-17-23 at 457.1 MHz, at 1.5 volts (CL-RCD-RP-RAS-RC)
Memory Timings 7-7-7-20-27 at 533.3 MHz, at 1.5 volts (CL-RCD-RP-RAS-RC)
Memory Timings 8-8-8-22-30 at 609.5 MHz, at 1.5 volts (CL-RCD-RP-RAS-RC)
Memory Timings 9-9-9-25-34 at 685.7 MHz, at 1.5 volts (CL-RCD-RP-RAS-RC)
Manufacturing Date 2011, Week 4
EPP SPD Support No
XMP SPD Support No

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Manufacturer Nanya Technology
Part Number NT2GC64B88B0NS-CG
Serial Number 7A742614
Capacity 2048 MBytes
Memory Type DDR3 (PC3-10700)
Speed 667 MHz (DDR3 1333)
Supported Frequencies 381.0 MHz, 457.1 MHz, 533.3 MHz, 609.5 MHz, 685.7
MHz
Memory Timings 5-5-5-14-19 at 381.0 MHz, at 1.5 volts (CL-RCD-RP-RAS-RC)
Memory Timings 6-6-6-17-23 at 457.1 MHz, at 1.5 volts (CL-RCD-RP-RAS-RC)
Memory Timings 7-7-7-20-27 at 533.3 MHz, at 1.5 volts (CL-RCD-RP-RAS-RC)
Memory Timings 8-8-8-22-30 at 609.5 MHz, at 1.5 volts (CL-RCD-RP-RAS-RC)
Memory Timings 9-9-9-25-34 at 685.7 MHz, at 1.5 volts (CL-RCD-RP-RAS-RC)
Manufacturing Date 2011, Week 4
EPP SPD Support No
XMP SPD Support No
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Batteries Top <#TOC>
Property Value
Microsoft ACPI-Compliant Control Method Battery
Device ID ACPI\PNP0C0A\0
Status 0x0180200a Started
Problem 0x00000000 (0)
Service CmBatt
Capabilities 0x00000030
Config Flags 0x00000000
Class Battery
Manufacturer Microsoft
Hardware IDs ACPI\PNP0C0A
Class GUID {72631e54-78a4-11d0-bcf7-00aa00b7b32a}
Enumerator name ACPI
Description Microsoft ACPI-Compliant Control Method Battery

DriverVersion 6.1.7600.16385
MatchingDeviceId composite_battery
DriverDesc Microsoft Composite Battery
Class Battery
ClassDesc Batteries
IconPath %systemroot%\system32\batt.dll,-2
Installer32 batt.dll,BatteryClassInstall
NoInstallClass 1

I'd like to upgrade the RAM, HDD). Is there any difference between this list of RAM. I'm not sure if either of these will make a diff:

Kingston 8GB (2x4GB)
GSKILL 8GB (2x4GB)
Patriot 8GB (2x4GB)
They are all the same price

With the additional RAM, will my power be enough? Lastly, I want to keep my laptop from overheating, any advice on how to tweak the fan?