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Samsung 840 pro vs ALL?

post #1 of 12
Thread Starter 
Hey OCN,
I want to purchase a ssd for my laptop, the laptop is rated 4hours on battery with mechanical drive. I've been hearing about how low the power draw is for the 840 pro, how much do you think/know will increase my laptop battery life? Will it be significant?

So basically I'm asking S\should I be buying the 840 pro for the power draw or go with something cheaper like 830 or Intels.

Thanks in advance!
Edited by darksen - 11/20/12 at 10:08pm
post #2 of 12
The 840 Pro draws far less energy than the 830 series, the NAND has gone through a die shrink which lowers power requirements even further! I have owned an 830 series for almost two months and have only good things to say about it, but the lower power draw of the 840 Pro is ideal for a laptop! When you compare that with a 5400rpm HDD that's draw a lot of power when compared to an SSD.
post #3 of 12
Thread Starter 
Quote:
Originally Posted by Systemlord View Post

The 840 Pro draws far less energy than the 830 series, the NAND has gone through a die shrink which lowers power requirements even further! I have owned an 830 series for almost two months and have only good things to say about it, but the lower power draw of the 840 Pro is ideal for a laptop! When you compare that with a 5400rpm HDD that's draw a lot of power when compared to an SSD.

Do you how much does a mechanical drive draw while active? take a 5400 for example.

The laptop will have a GeForce 650m as well so that will burn a crapload.

If it can bump battery up by 1 hour i'd get it in a heart beat.
post #4 of 12
Quote:
Originally Posted by darksen View Post

Do you how much does a mechanical drive draw while active? take a 5400 for example.
The laptop will have a GeForce 650m as well so that will burn a crapload.
If it can bump battery up by 1 hour i'd get it in a heart beat.

I might not be able to tell you how much power a HDD draws, but I can tell you that having to spin a HDD up to 5400rpms draws way more than any ten SSD's. I know that's not the answer you wanted but you have to understand a HDD has moving parts where a SSD has none.
post #5 of 12
Thread Starter 
oh yea, that for sure. I guess I didn't make myself clear.
I already own a m4, a vertex 3, an agility, a hyperx, and a solid 3(discontinued), so i'm FOR SURE going for a SSD.

I'm just trying to justify whether to spend the premium on the 840 pro ssd purely for the reduced power draw since the real world performance won't be noticeable, say, compared to the 830 which cost great deal less, esp with black friday coming up.

Thanks!

EDIT: Right now the lowest price for 128gb 840 pro is at newegg for 139.99 with free ACIII game.
the 830 256gb can be bought at $168 with Freeshipping for comparison, not even sure of Black friday deals yet.
Edited by darksen - 11/20/12 at 10:41pm
post #6 of 12
Quote:
Originally Posted by darksen View Post

oh yea, that for sure. I guess I didn't make myself clear.
I already own a m4, a vertex 3, an agility, a hyperx, and a solid 3(discontinued), so i'm FOR SURE going for a SSD.
I'm just trying to justify whether to spend the premium on the 840 pro ssd purely for the reduced power draw since the real world performance won't be noticeable, say, compared to the 830 which cost great deal less, esp with black friday coming up.
Thanks!
EDIT: Right now the lowest price for 128gb 840 pro is at newegg for 139.99 with free ACIII game.
the 830 256gb can be bought at $168 with Freeshipping for comparison, not even sure of Black friday deals yet.

Darn $168 for an 830 series 256GB SSD, that hurts because I paid $220 for mine! I just decided to start my build earlier than expected, no regrets.
post #7 of 12
Thread Starter 
http://slickdeals.net/permadeal/81634/amazon.com-samsung-solid-state-drive-ssd-256gb-830-series-2.5-sata-iii-ssd-155-128gb-830-series-2.5-sata-iii-ssd


yea, it was even lower before. The track record is there, it's just a matter of if I have the patients to wait until black friday to see the deals on 830 or if they will even lower the price for the new 840 pro.

Who knows, maybe OCZ will decide to release vector tomorrow to drive down the price.
post #8 of 12
Quote:
Originally Posted by darksen View Post

Do you how much does a mechanical drive draw while active? take a 5400 for example.
The laptop will have a GeForce 650m as well so that will burn a crapload.
If it can bump battery up by 1 hour i'd get it in a heart beat.

Quote:
Originally Posted by Systemlord View Post

The 840 Pro draws far less energy than the 830 series, the NAND has gone through a die shrink which lowers power requirements even further! I have owned an 830 series for almost two months and have only good things to say about it, but the lower power draw of the 840 Pro is ideal for a laptop! When you compare that with a 5400rpm HDD that's draw a lot of power when compared to an SSD.

The difference just isn't that big. 2.5" 5400 RPM HDDs usually draw 0.8-1W idle. Sure, the SSD's power draw is lower but the difference in power consumption isn't significant enough to equate to add'l 1 hour battery life if you already have a GT 650M in the system.

Let's say we have 2 systems with the same size 80Wh battery and 5400RPM HDD with 1W power consumption idle. Let's assume we'll replace the HDDs with SSDs that only use 0.1W idle.

System 1, 4 hrs battery life w/HDD
ave power draw = 80Wh / 4h = 20W
battery life with SSD = 80Wh / 19.1W = 4 hrs 11 mins

System 2, 8 hrs battery life w/HDD
ave power draw = 80Wh / 4h = 10W
battery life with SSD = 80Wh / 9.1W = 8 hrs 47 mins


Pretty simplified calculations but you get the idea. Unless your build already uses very little power to begin with, you're unlikely to see a big gain in battery life.
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post #9 of 12
Thread Starter 
wAit what? 4 extra hours is not significAnt???? Did i read it wrong?
post #10 of 12
I suppose you did wink.gif
Quote:
System 1, 4 hrs battery life w/HDD
ave power draw = 80Wh / 4h = 20W
battery life with SSD = 80Wh / 19.1W = 4 hrs 11 mins

So, in other words, 11 minutes by his calculation smile.gif
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