Using a different laptop PSU?

[ybriK]

I have an old MSI Laptop which has lost its own PSU, however I have a Toshiba Laptop PSU that has an output of 19V 3.42Amps. The MSI Laptop requires 19V 2.1Amps. I did a quick research and read that as long as the voltages are exactly the same and the Amperages for the PSU are the same or above to what the laptop requires then it is fine. Should I be fine with this, I mean the voltages are the same only difference is the amperage, which is higher on the Toshiba Laptop PSU.

[MeepLikesToBuildPc's]

Youre golden.

I learned it the hard way By using a 2.5 amp laptop PSU in a laptop that needed 7.8 amps..... RIP PSU

[VioDuskar]

plug it in. see what it does.

 

i've mismatched all kinds of chargers before. i've found that various Voltages and amperages work sometimes. they just charge at different rates.

if the plug fits, try it.

[Stefan1024]

Your research is correct.

[airdeano]

voltage is the key, but like the desktop counterparts wats is the next consideration.

 

MSI 19.2v x 2.1A = 40.32watts

Toshiba 19.2v x 3.42A = 65.66watts

 

the tosh will be fine as not to under power the system. 

[W-L]

I have an old MSI Laptop which has lost its own PSU, however I have a Toshiba Laptop PSU that has an output of 19V 3.42Amps. The MSI Laptop requires 19V 2.1Amps. I did a quick research and read that as long as the voltages are exactly the same and the Amperages for the PSU are the same or above to what the laptop requires then it is fine. Should I be fine with this, I mean the voltages are the same only difference is the amperage, which is higher on the Toshiba Laptop PSU.

 

Yes that's not a problem and you correct about the larger amperage provided by the Toshiba power brick. 

 

Youre golden.

I learned it the hard way By using a 2.5 amp laptop PSU in a laptop that needed 7.8 amps..... RIP PSU

 

You got yourself a pretty power hungry gaming laptop there 

[Bensemus]

Yes that's not a problem and you correct about the larger amperage provided by the Toshiba power brick. 

 

 

You got yourself a pretty power hungry gaming laptop there 

Lol. After reading that and knowing that my old gaming laptop's exhaust would burn after a few seconds I checked out its power requirements. Only 6.3 amps

[D2ultima]

Wow, 40W. I don't even think 40W would power my CPU alone, far less the rest of my PC. What kind of laptop has a 40W charger O_O

[ybriK]

Wow, 40W. I don't even think 40W would power my CPU alone, far less the rest of my PC. What kind of laptop has a 40W charger O_O

Majority of laptops that are either: Entry level - Medium performance don't require a lot of power since their hardware components are not built for extreme performance.

 

Your CPU requires 47W.

[Guest]

The only issue that I haven't seen mentioned is that the DC jacks may not be the same size. Other than that you are golden.

[Stagea]

Wow, 40W. I don't even think 40W would power my CPU alone, far less the rest of my PC. What kind of laptop has a 40W charger O_O

 

40W is fairly common with Ultrabooks, Convertibles, etc. running "U" or "Y" processors. I have a Core M (Y processor) convertible, and it sips power from the outlet. When fully charged, it just sips about 4W from the outlet (based on my trusty power meter).

[Aniallation]

Wow, 40W. I don't even think 40W would power my CPU alone, far less the rest of my PC. What kind of laptop has a 40W charger O_O

Mine has a 35W.

 

http://linustechtips.com/main/topic/341760-do-u-even-power-consumption-m8/

[D2ultima]

Entry level - Medium performance don't require a lot of power since their hardware components are not built for extreme performance.

 

Your CPU requires 47W.

no, you'd need a ULV chip no matter what for that. Regular i3 and i5 chips would require more power; 25-35W for their chips + rest of system draw

I know what my CPU does, I was simply amazed at a 40W charger. It blows my mind D=

 

40W is fairly common with Ultrabooks, Convertibles, etc. running "U" or "Y" processors. I have a Core M (Y processor) convertible, and it sips power from the outlet. When fully charged, it just sips about 4W from the outlet (based on my trusty power meter).

Yeah that's true. 15W CPUs + rest of system equates to around 35-40W indeed

 

Mine has a 35W.

 

http://linustechtips.com/main/topic/341760-do-u-even-power-consumption-m8/

OH GOOD GRAVYFUL LORD NO NO GET IT AWAY *dies*

[ybriK]

no, you'd need a ULV chip no matter what for that. Regular i3 and i5 chips would require more power; 25-35W for their chips + rest of system draw

I know what my CPU does, I was simply amazed at a 40W charger. It blows my mind D=

I guess Pentium Dual Cores for mobile devices are under ULV then?

 

EDIT: Well I just looked up the TDP for the Toshiba Laptop's CPU, it's 35W.

[D2ultima]

I guess Pentium Dual Cores for mobile devices are under ULV then?

 

EDIT: Well I just looked up the TDP for the Toshiba Laptop's CPU, it's 35W.

A 35W CPU with a 65W PSU is just fine. A 35W CPU with a 40W PSU is asking for power loss shutdowns under load.

[Stagea]

A 35W CPU with a 65W PSU is just fine. A 35W CPU with a 40W PSU is asking for power loss shutdowns under load.

Not if the battery can provide power during momentary peaks. It'd be a sorry sight to see a machine that needs to switch between power sources just because of a weak power brick though.

[D2ultima]

Not if the battery can provide power during momentary peaks. It'd be a sorry sight to see a machine that needs to switch between power sources just because of a weak power brick though.

That needs to be specifically coded to happen, and it's not a good alternative. MSI laptops did that and their machines throttled like a banshee because of it.