Are there any solutions for limited PSU?

Hi, guys I haven't been here for several months after I put 6970m in my M15x.
As I know, there is no way to solve the issue about drawing limited power from PSU. However, I heard that someone changed hardware of a 330W PSU and used it on M17x R2( with many defects) . At the same time, a guy tried to insert the ID of PSU into BIOS and will completely solve the issue.
I just got a 240W PSU from a friend and really want to use it for further overclocked 6970m on M15x. Are there any results of tests?

 

The board can't handle more than what it takes now. Even if that were to work, your machine would die sooner than later.

What are your clocks now?

 

I currently using a m17x r3 psu, during benching i have seen 180w power draw.

 

I have also ordered a M17x flextronic 240W PSU. I will be benching with voltmeter and wil push things to the limit to see just what this board will let us do as I can't find a conclusive answer.

Mexic001s can you shed light on this. My killawatt is in the UK so will take time to get it to Japan lol, if you could bench with OCed 920xm + 6990M and see the max this board can pull would be great!

 

920qm and 6970m (1v) are both in default clock. This is a completely stable status.

 

I use a belkin insight to check the power consumption. While gaming bf3 mp i keep the xm @ stock setting and the gpu is undervolted to 1.02v @ 3d clocks. It consumes 142-151watts. While benching xm @25 accross and tdp @85/70 and gpu volts @ 1.1, i can get about 183watts i think is the highest i have seen so far, but i will check once i get home from work and update this post.

 

As others have said, the motherboard limits the power draw. A bigger PSU will provide steadier power and will help with some of the throttling, it'll also stay significantly cooler but that's about it.

Sorry to jack your thread but
@Mexicools
What are your specs on the Aurora you ordered? I wanted one so bad, but I couldn't justify the price, so I just built my own desktop.

 

Lol.... Yeah i made the decision to get the r4 after having a list of parts to build my own, and i was able to get it at about 29% off. My spec are 3960x @ 4.0ghz, 8gb ram @1600(i already bought 16gb corsair dominator gt@2133 quad channel to replace that), 560ti oem(which is the best card offered at the moment), 512ssd, bluray-dvd burner combo, alx chassis thats about it for the main stuff, total was about $2800. Sucks its been in production for about a month now, its supposed to be shipped by 3/2

 

I've already explained a couple of times how exactly the M15x behaves when it comes to drawing power...

- The CPU can draw as much power as it needs. When using my 920xm inlcusive overvolt (cpu) and overclock, I've seen power draws of 220W and more (and the GPU hasn't been used at this point...)
I'm talking about hardcore overclock with 30x multi and higher on all cores.

The 150W PSU will trip at about 195-200W power draw. (I used a 240W adapter).

So, there's absolutely no power limit on the motherboard for the CPU, trust me, even if there was one you wouldn't be able to see it since the CPU gets unstable before hitting a power limit, even overvolted.


It looks totally different for the GPU. Even without overclock and overvolt, I've seen the GPU voltage and clocks drop when running a combined test on GPU and CPU... this was with the CPU overvolted. So it seems that the CPU can leech voltage from the GPU, or that the board is designed badly and that there's somewhere a voltage drop in the GPU voltage circuits when there's heavy load on the CPU.

Also with no overvolt or overclock on the CPU, the GPU gets limited, you can reach this limit when you highly overclock a 69xxm or even easier when you overvolt it. The voltage will drop, the clocks will throttle... and so on.

It's really weird / annoying since the CPU can easily handle insane amounts of power. The GPU stays limited when it comes to power draw.

If overvolting the CPU even the 5870m won't get enough power to run at full speed. But the CPU has no issues at all...

 

That really isn't a bad price on that rig considering... congrats on that sexy system. What GPU(s) are you planning on putting in it?

Or it means that those s at Dell didn't want us upgrading or heavily overclocking our GPU. I wonder if there is a way around this?

 

Waiting to see what the 680 can do since the 690 wont be out till Q3, havent made up my mind yet 680(sli???), or the 7990

 

In this case if the m15x supports the 7990M lol then we should be sorted. 28nm!

 

Thank you very much for your reply~We talked about BIOS MOD before, is it useful?