CPU freezing on GPU overclock

[urexyvca]

First, yes, I am well aware that I'm stupid for trying to overclock a laptop GPU, but I like to play with fire you know... I can't really upgrade this GPU since it's soldered in the board and right now I can't really buy a new laptop nor build a PC.

 

Anyway, I have a laptop with Intel Core i3-3110M, and Radeon HD 7650M.

Default clock speeds for 7650M are 500MHz for core and 900MHz for memory.

I managed to overclock the core to around 710Mhz and the Memory to 1100Mhz. After cinebenching, I came to a conclusion that it's around a 33% improvement. That's a jump from 27fps to 36fps, in cinebench.

 

But there's something in this process that kinda caught my eye.

After overclocking the computer would kinda act weird, more like CPU freezing. For example, let's say I was listening to music and moving my mouse, the CPU would freeze in a way that I hear the last music tone constantly and mouse cursor wouldn't move. Now I do know I should expect my computer to just do stuff like this but I don't know why is the CPU freezing exactly. Could it be that it's not getting enough power or something? Just curious.

 

Now, that freeze happens when I overclock too much like 720MHz, it's like the CPU freezes in short bursts followed by a blue screen that says "IRQL_NOT_LESS_OR_EQUAL". However if I lower the clock to 710MHz, while I don't get those bursts of CPU freezing, I did get it just twice for around 300 miliseconds. So I'm just curious why it freezes like that. Keep in mind that this laptop also has a Integrated graphics, so when my overclock fails instantly, (example if I overclock to 760MHz), I don't have to reboot, I just have to dial back my overclocks.

[Bananasplit_00]

not enough power probably, laptops are only built with the max non OC power draw in mind

[urexyvca]

My laptop has a 90W power brick with a broken data pin

[Redicat]

20 minutes ago, Kyuunex said:

My laptop has a 90W power brick with a broken data pin

Most laptops aren't capable of overclocking and highly optimized for temperatures and AC power.

[urexyvca]

43 minutes ago, Redicat said:

Most laptops aren't capable of overclocking and highly optimized for temperatures and AC power.

So, I'm lucky I got this far?

I was still thinking if I were to get a power brick that would supply more power if it would work...

[Redicat]

1 hour ago, Kyuunex said:

So, I'm lucky I got this far?

I was still thinking if I were to get a power brick that would supply more power if it would work...

I wouldn't try it's only external the laptop will only take an amount of current in amps, no point.

[Dabombinable]

TBH that overclock isn't too bad. This laptop with its Phenom II N970, MR HD5650 (5770 with 100MHz OC) and MR HD4250, and at 700MHz (550MHz stock) it comes across the same problem (90W power brick as well).

[urexyvca]

8 hours ago, Dabombinable said:

TBH that overclock isn't too bad. This laptop with its Phenom II N970, MR HD5650 (5770 with 100MHz OC) and MR HD4250, and at 700MHz (550MHz stock) it comes across the same problem (90W power brick as well).

BTW, MSI afterburner only allowed me to overclock mine to 650MHz, the dial wouldn't go more, (yeah just by 150MHz), I just found a glitch that would let me overclock some more.

[Dabombinable]

8 minutes ago, Kyuunex said:

BTW, MSI afterburner only allowed me to overclock mine to 650MHz, the dial wouldn't go more, (yeah just by 150MHz), I just found a glitch that would let me overclock some more.

That glitch might be causing the issues then. And I just found out that this laptop's motherboard actually limits the amount of input power to 65W, so that and the fact that the GPU voltage is locked at 1V for me at least is why I can't get a 150MHz OC fully stable (well, its seems stable in all of my DX 11 games, but any DX 9 or 8.1 game causes an instant freeze, restart or BSOD).