920XM + M6000 overclocked PSU

Alright so these will be arriving in mail here pretty soon, what PSU should I get and also will I have to do the center pin mod to overclock both my CPU and GPU. I'm fine with doing the mod but doesn't it cause it to not charge the battery?

 

I posted something similar. People recommend at least the 210W power supply if you are going to be overclocking the CPU. The 920xm has a tdp of 55W which is an average value and does not take into account overclocking. If you are going to overclock the cpu, the power draw can reach over 100W under load from what I've read. The m6000 has a tdp of 43W according to techpowerup, so that number will also go up under load and if it is overclocked. Those numbers can easily reach the 150W limit of the stock power supply. The power supply may be able to provide a bit more, but it will run hotter and less stable (not to mention all the other laptop components that need power too). If you get a power supply capable of providing more power, it will cover the power draw of the overclocked cpu and gpu and probably still have more to spare, meaning the psu will operate well within its specs, and thus cooler. The pin mod should be done on the right angle adapter. Apparently the center pin on Dell laptops works to regulate the power supply. Pulling out this pin will allow the the psu to operate freely and provide more power to power hungry components. You will also need to disable power adapter warnings in the M15X Bios.

This is the adapter:

http://www.ebay.co.uk/itm/Pwr-Right...402101?hash=item5675bb6235:g:9i0AAOSwpdpVbi0O

Here's a thread regarding the pin mod:

http://forum.notebookreview.com/threads/alienware-m15x-upgrade.760185/page-10

And according to this, pulling the pin means your battery will no longer be charging. This is why the mod is done on the right angle adapter and not the actual power supply's plug. To charge your battery, I guess you remove the right angle adapter, and plug your power supply directly in to the laptop.

http://forum.notebookreview.com/threads/a-few-questions-about-my-alienware-m15x-and-upgrades.755727/

I plan on getting a 240W adapter. It doesn't hurt to have more power available, even if it's not needed.

 

I guess we'll have to see if the pin mod is really needed or nah.

M6000 in thoery should use less than our 460M's.

 

Ordered the angled connector.

 

If you don't overclock the 920xm and don't overclock the m6000, then I think you will be fine with the 150W PSU. From all the research I've done, Dell only sold the M15X with the 150W PSU while at the same time selling it with the 920xm and much more power hungry graphics cards like the 260m GTX and 460m GTX.

I think though that it's a shame not to overclock the 920xm since it already has an unlocked multiplier. It's like having a Ferrari and driving it like a grandma. That's why I'm gonna get me a 240W PSU. If you do decide to get the bigger PSU, I think you're gonna have to do a pin mod to utilize it on the M15X.

King of Interns will hopefully chime in. He's the grand master of M15X mods

 

If you decide to get the bigger PSU, I think you're gonna have to do the pin mod to utilize the extra power on the M15X.

King of Interns will hopefully chime in. He's the grand master of M15X mods

 

ofc I'll be getting a bigger PSU, overclocking is my middle name.

 

Hey man. I have both 330W and 210W adaptors. They won't charge the battery but otherwise work great. You won't need the angled adaptor with these PSU's as I pulled the pin on them already. Didn't charge battery anyway and without pin = no throttling in game

FYI the throttling WILL occur if your total power consumption goes beyond about 180W. The M15x reacts by throttling the GPU annoyingly. Pulling the pin on the adaptor (or using the angled with pin pulled) stops the M15x doing this and allows it to pull as much power as it needs throttle free. Strangely when the throttle happens it will never throttle the cpu only the gpu. Even if the cpu is overclocked and overvolted. So basically the throttle only affects gaming.

I am happy to send to you free (just cost of shipping) keep your original 150W for battery charging

Also I really don't recommend overvolting the 920xm. The heat it creates is not manageable at all. Also the pin mod only allows for a large +200mv boost. It is unfortunate the M17x R2 allows bios increases of +50mv and +75mv. If only we had this numerous chips could hit 4ghz on sustainable air cooling...

 

so if you overclock the 920xm to say 3.4ghz , and have the m6000 at 1000/1250.

Would the original 150w with the pin pulled be ok to use or u recon it would trip ?

 

Just ran Prime95 at 3.4Ghz and clocked 190W from the wall!!! This is just CPU! This is with my laptop plugged in to many peripherals and all the lights flashing like a mobile disco. Idle (with chrome open) seems to be around 70W (although I suspect there are a few background tasks running which are stopping my CPU from going into the lowest power states). So CPU can easily use over 100W by itself!

Will do a few more tests with witcher 3 at 3.3Ghz and different GPU clock speeds and update this post.

 

The idea behind pulling the pin AFAIK is to allow the laptop to draw as much power as it needs from bigger adapters without any of the M15X power management limits in place. I don't think they'll be any benefit in doing this to the stock adapter, not to mention you'll lose battery charging capabilities in the process.

 

So, buy 210w dell pa-7e and right angle adapter.

Pull pin out of the right angle adapter, and use laptop with right angle adapter without pin to get maximum performance.

If charging battery, use original adapter which still has the pin WITHOUT the right angle adapter.


And KOI said that the 330w adapter will trip if the machine gets over 240w? Why is it so?

 

^_^

 

210w adapter it is. Will buy it next month i guess, dropped £300 on the pc over this weekend so skint now

 

My HWInfo doesn't have that Intel PCH. Is that to do with the chipset?

 

That was one of previus versions of HWiNFO, screenshot was made in 2013.

 

I wonder where that info went? Definitely an interesting metric.

EDIT: witcher 3 with a big GPU OC draws 215W from the wall! 210W PSU handles this no problem.

 

PA-7E 210W can handle 290~300w just fine though?

 

No way. I think it trips out at around 245W.

 

Well mine did. Cant be sure about others.

A way to make the psu more stable at high load would be to actively cool it.

245w was the limit in 26C ambient! I used to put the thing on top of a table fan on its side. Really helped!

Cut the plastic off and mod a heatsink onto it and play in cooler ambient and perhaps 250-260w might be possible.

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