Replacement (Smaller) Power Pack

Hi there,

Just wondering if anyone knows of a smaller replacement powerpack for the gx640?

Cheers
Chumby

 

There's a 6 cell battery which fits right in...

 

I believe he asked about power brick.
Somehow I don't expect another 120W power brick would be any smaller/lighter.

 

OK found one...

http://dell.kensington.com/html/11248.html

and here is a skinny DC version....

Amazon.com: Kensington Lightweight, Slim line 120 Watt DC Notebook Power Adapter for PC Laptops- 33196: Electronics

They claim to be 40% smaller/lighter?

Has anyone ever used one of these?

Cheers
Chumby

 

Just read the description of that Kensington adapter:

Technical Information

Product Type: Auto/Airline Adapter
Input Voltage: 11 V DC to 16 V DC
Output Voltage: 3 V DCto 24 V DC
Output Power: 120W
Input Connector: Automobile Cigarette Lighter
Input Connector: Airline Power Socket

Somehow I cannot see the possibility to connect it to the AC 230V (or 115V) wall outlet.

It's just a DC to DC adapter, which is practically wothless.

Edit: On official Kensington description I noticed it can actually connect to AC source. In this case this could be a good alternative for bulky MSI adapter.

 

But you sure that 120W is enough? Because I remember connecting my old small msi adapter and I got not enough juice out of it when running games or furmark... When running furmark my temp would always fall down every few seconds because I guess my GPU shut itself down for short milliseconds...
So just make sure it is as powerful as the MSI adapter ;-)

 

What are the stats on the original MSI power supply?

I'm still waiting for my machine to arrive....

Bit of a disussion about the adaptor here:

Kensington 33197 (REFURB) 120 Watt Notebook AC/DC Power Adapter for $20 - FlyerTalk Forums


Cheers
Chumby

 

The power rating on my GX640's power brick says 120W, so 120W is exactly what you should aim for.

 

Sorry pal, the Kensington brick won't work.

Watts = Voltage x Amps

In this case, the laptop requires 19V and 6.32A at peak load. Those puny replacement power adapters might give you enough voltage, because 19V is nothing special for a notebook. However, 6.32A is a pretty beefy number and most power adapters don't output that much.

What'll happen is that your replacement power adapter will work as intended while the computer is idling. However, as soon as you fire up a resource intensive application, such as a game, the power adapter won't be able to supply the graphics card with enough current and thus, the laptop will either crash or switch to battery power.

Total wattage isn't everything folks.

 

Yes, I surely know, that Watts = Voltage x Amps, but if they advertise

Output Voltage: 3 V DCto 24 V DC
Output Power: 120W

It means (at least theoretically), that this adapter is capable to produce 5 Amps@24Volts. In that case I sincerely believe it will output those 6 Amps@19Volts.

Of course nobody can ever be sure unless he tried it himself or has a strong reference. I've seen pretty much chinese desktop PSUs with impressive numbers. Most of them fried out after first few minutes when given the power they were designated (400W,450W,550W and so on).

From that experience I can confidently say: a good power supply unit with good reliable components must weight a premium.

 

That's your theory.

 

Have been in contact with Kensington .. apparently not manufacturing that model any more.

Came across another though....

IT Device - Get It Online

with

# roduct Type: AC-DC
# Efficiency: 85%
# Input Outlet: C8/Small 2 Pins
# Input Voltage: 100-240
# Input Frequency: 50-60Hz
# Output Voltage: +19V
# Current Output Max.: 6.32A
# Output Power Max.: 120W
# Short-Circuit Protection: Yes
# Over-Current Protection: Yes
# Safety Approval: CE, UL/cUL, CB, NEMKO, C-Tick
# Dimensions(LxWxH) mm: 167x65x37
# Accessories: 8+1 DC Output / Plug Tips, Travel Bag, Power Cord

Is this smaller than the original?

Cheers
Chumby

 

It's actually slightly larger. It's 1cm longer and just as wide and thick.

 

OK ... no prbs ... will keep looking.

Cheers
Chumby

 

I'm disappointed as well, because I'm looking for the same thing. Perhaps the power brick is that size, not from a lack of trying on the manufacturer's behalf, but because it has to be that way? We need an electrical engineer in here, pronto!

 

Found the manual for the Kenningston one... stats below:

Technical Specifications
Unit dimensions: 5.6" L x 3.1" W x 0.66" H
Weight: 11.4 oz.
AC wall socket input cable: 6.75"
DC auto/air input cable 18"
DC power output cable: 10'
Input voltage: 100–120/200–240 volt 50/60Hz AC
12 to 16 volts DC
Output voltage: 3 to 24-volt DC (configurable)
Output current: 6 Amps maximum (configurable)
Output power: Up to 120 watts (maximum)

Cheers
Chumby

 

Thoughts on using this one....? Only 120mm long

http://vigourbattery.manufacturer.g...tl/Laptop-AC/1007492478/Laptop-AC-Adapter.htm

Cheers
Chumby

 

That looks like it is only the two-pin figure8 connector, I think the stock one has 3 pins?

 

Yeah, that's quite a bit smaller. I just have two questions:

Would it fit in the GX640's power socket?

Where can it be bought?

No ground or circuit protection, in most cases you don't need it.