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640m: the same, but clocked slower, than the 650m? - Page 2

post #11 of 21
Many mobile GPUs OC extremely well.
Quote:
Originally Posted by Lord Xeb View Post

Don't overclock mobile platforms.

I currently have a 7900GS Go, a Radeon 5650, and a GT 555M, and all of them handle significant OCs without issue, and have for some time. The 5650 (OCed from 500MHz to 648MHz) has been loaded 24/7 for almost two years, and the 7900GS Go (OCed from 375MHz to 540MHz) been used heavily for six years. The GT 555M is newer and longevity is still in question, but everything seems solid so far with a modest OC from 753MHz to 864MHz.
Edited by Blameless - 9/10/12 at 2:07pm
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post #12 of 21
Quote:
Originally Posted by ComradeNF View Post

OC'd my 640m LE from 500/1000 to 900/1000 (650m clocks) using a VBIOS mod on my Sony Vaio S13. Runs beautifully at stock voltage.
Did a benchmark video of the 900/1000 if interested: http://www.youtube.com/watch?v=wRKqg6tnYIk
Hows your temps?

And what kind of cooling do these mobile cards come with? im not too familiar with mobile GPU's. Do they have a seperate air vent similiar to the cpu, or is it discretely water cooled?
post #13 of 21
Quote:
Originally Posted by AlaskaFox View Post

Hows your temps?
And what kind of cooling do these mobile cards come with? im not too familiar with mobile GPU's. Do they have a seperate air vent similiar to the cpu, or is it discretely water cooled?

Depends entirely on the chassis the laptop is in. Most midrange laptops have both the CPU and GPU cooled with the same fan and heatsink, but with different heatpipes connecting the components.

Watercooled laptops are virtually unheard of, and you will never see a mainstream/consumer one.
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post #14 of 21
Hm i thought a few alienware/msi gaming series laptops were watercooled.

MAYBE IM PSYCO :B
post #15 of 21
Quote:
Originally Posted by AlaskaFox View Post

Hows your temps?
And what kind of cooling do these mobile cards come with? im not too familiar with mobile GPU's. Do they have a seperate air vent similiar to the cpu, or is it discretely water cooled?

Never seen my CPU or GPU temp go above 80 degrees, even on very hot days with my windows open.

The cooling is standard air cooling with the CPU and GPU sharing a heatsink with 1 fan.
post #16 of 21
Check out this page on notebookcheck for information on the GT 640M and GT 650M.
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post #17 of 21
Has anyone found a modded BIOS for the Samsung NP700z5c-s01us's 640m with 1gb GDDR5?
post #18 of 21
No reason to really. Just overclock it like mad. tongue.gif
     
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post #19 of 21
Quote:
Originally Posted by Lord Xeb View Post

Don't overclock mobile platforms.

Why would you even suggest that. We all know overclocking is temperature dependent outside of VRM stability. As long as you monitor your temps, and that you can't normally go out of your voltage limits already, it is no different then overclocking a desktop. The lenience for the desktop is much better cooling.
post #20 of 21
Quote:
Originally Posted by Domino View Post

Why would you even suggest that. We all know overclocking is temperature dependent outside of VRM stability. As long as you monitor your temps, and that you can't normally go out of your voltage limits already, it is no different then overclocking a desktop. The lenience for the desktop is much better cooling.

And to further back this up, the VRMs used in laptops are the same as those used in desktops. A generic laptop generally has a 2+1 phase setup. This sounds pathetic until you remember that a laptop CPU only uses around 35 watts. The easiest way I've seen to identify how far you can go and still be safe is to count the VRMs, find their positioning (separating which are which) and proceed from there. A 4+2 arrangement on most desktop motherboards will support a 125w CPU without a problem. You can't overclock it for crap and think you're safe, but you can support it. My M17x R2 has a 3+1 arrangement, so I'm more than capable of handling a modest overclock.

Also, overclocking mobile platforms isn't something new. This has been something that's gone on for several years, well over a decade, since the first gaming laptop was created. If you legitimately believe that overclocking a laptop is less dangerous than overclocking a desktop, please go away and research before posting. rolleyes.gif
Edited by Imglidinhere - 2/12/13 at 9:34pm
     
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