Can GT 650M overclock past GTX 660M? Help a brother out.

I'm currently looking to buy a Lenovo IdeaPad Y500 or Y580 for gaming and am deciding between these two models:

Y500:
15.6'' 1080p screen
1TB 5400 RPM HDD
GT 650M 2GB @ 790 MHz-835 MHz core/4 GHz GDDR5
8GB RAM
$830 w/eCoupon

Y580
15.6'' 768p screen
750 GB 5400 RPM HDD
GTX 660M 2GB @ 835 MHz-950 MHz core/5GHz GDDR5
6GB RAM
$830

My dilemma right now is that even though I really want the 1080p screen in the Y500, I also want the better gaming performance of the GTX 660M in the Y580. Configuring a Y580 with a 1080p screen is out of the question because it's not in my budget.

Since the 650M seems to differ from the 660M only in clock speeds, is it possible to overclock or BIOS flash a 650M to equal or exceed the performance of a 660M? Or is that not possible because the 650M is running at a lower voltage or is a lower binned, lesser quality part? Can anyone confirm that the 660M does indeed run at a higher voltage? Has anybody successfully overclocked the 650M to or past 660M levels?

Thanks for the help.

 

The gt 650m can easily pass gtx660m while overclocked. even when at normal clocks the performance difference between them is negligible .in some cases the 650m passes the 660m. There is another fourm which has overclocked the y500. also the y580 overheats like crazy when playing at higher resolutions. On the flipside thee 80 does better at battery life with optimus and the gtx does some kind of anti alising that the 650m does not

 

I would prefer the y500 the 1080p screen is a most for me , also i think you can get later another gt 650m card at lenovo ( right now at $130 usa website) for better gaming performance. Good luck in you search !

 

the 650ms are failed 660ms from proccess, they weren't able to pass 660m test. That doesn't mean they can't but it's probably at the threshold. Each card will overclock differently

But yes as mentioned above the heating on the y580 can pose a problem, but honestly for me, I'm @ 1250 mhz and mem @ 1375 mhz. Others couldn't get it past 200 other can get it to 300mhz.

I've seen a 650 hit around 1150 mhz though so you never know!

Also I prefer 1366x768 resolution because I can play games at native resolution without sacrificing frames IMO better long term investment!

 

The lack of Optimus and WiDi on the Y500 is not really an issue for me. However, are the touchpad issues fixed now? That's important for me.

The overheating on the Y580 is definitely a dealbreaker if it's serious.

Does anyone know if the single GT 650M in the Y500 is able to GPU Boost to 835 MHz, or does it max out at 790 MHz? I've read that when running SLI, GPU Boost is disabled and the core stops at 790 MHz. Does it do the same thing with a single GPU?

Sounds like the Y500 is probably the better option then?

 

If its about touchpad, both touchpads suck. I can't speak for the y500, but the y580 one is absolute garbage...probably the worst touch pad i've ever used in my life.

The y580 heat issues are no where near as bad as ppl say...at least for me like i said with the overclock my gpu is still only around 75 max.

The y500 is definately a wonderful machine, but it's battery was a deal breaker for me If I didn't need battery I prob would've grabbed the 1366x768 version and seen what 2 650m could do at that I could prob max out any game at native! lol

Happy shopping! I think there is a sale going on now if I'm not mistaken!

 

In my Y500 GPUs are maxed out to 790mhz (core) and 2000mhz (memory) in both SLI and single GPu configurations. However with Nvidia Inspector it is really easy to overclock these, I'm currently using in SLI settings 950mhz (core) and 2300 mhz (memory), with these settings I'm getting max 70C temps in my GPUs so this machine has some serious cooling power!

Really powerful machine, it suffers only a driver issues. Only drivers I have been able to make work with Vsync turned on (VSync has to be on with SLI, otherwise there are massive screen tearing) are 310.90 WHQL from Nvidia's site.

Both Lenovo's drivers which came with the machine (306.00) and Nvidia's newest drivers (314.07) crashes every single time when trying to start any game and Vsync is turned on :/

 

I don't know how any1 can use V-sync, everytime I enable it in some games (source based mainly) it seems like there is input lag:S....or the aim is off. I think with v-sync comes input lag in a lot of cases.

 

Yeah input lag is annoying definitely in fast-paced FPS games like BF3 or CS. Nvidia has implemented Vsync method called "smooth" which can be enabled with Nvidia Inspector. This Vsync method reduces micro-stuttering and input lag so much that I can't notice it anymore.

I still prefer Adaptive Vsync because it seems to be less demanding and I only play strategy games and slow-paced FPS like Arma2 where normal combat situation is much more less rapid than for example in BF3.

 

The 650m (DDR3) in my W110ER can clock up to 1155MHz stable base clock, with 1010MHz memory and up to 1270 (still stable!) when it's boosting. Using Throttlestop makes sure that I reach the full boost potential. This chip is absolutely monstrous in mobile (While being rather lacklustre in the desktop...). So that's nearly 1.3GHz on a mobile card. Absolutely insane.

Btw, go for the Y500. Better screen, with a card that can easily be clocked up and way past the 660M.

 

If i'm overclocking the cpu, i should use throttlestop and for gpu, nvidia inspector?
If this is my first time should i read a guide on how to do it first? Don't want to wreck
my parts.