programmargorp

ok guys...for those with SLI gt750m, let's see those results with the newly supported mod bios svl7 provided; in hopes of good news....

To those who can answer this question: what do you guys have for your setting using Nvidia Inspector or the MSI afterburn for most stability? so far, I only got +135 and up to 400mhz for memory still using stock settings.

I pushed both cores up to 1045 and the mem up to 1250 on my 650M SLI with zero issues.

I had a problem similar to this when I installed my SSD.

The laptop refuses to boot in UEFI mode unless you have a GPT formatted UEFI bootable flashdrive.

No USB boot drive will be detected unless you do it this way.

So I had a try on my Y500 (NOT 510P), but kind of relevant anyway.

I could get about 123Hz stable, 130Hz with artifacts.

That's what I figured, but it seems like a PITA to have to do every time you update the driver or reformat.

Or you can just flash the SLI vBIOS and live with no voltage control.

TECHNICALLY what you can do is

1) Flash the Lenovo SLI BIOS for W8.1

2) Enable SLI

3) Flash the Modded BIOS.

SLI will still be enabled and you'll have voltage control. The problem would be that if you disabled SLI for any reason, you'll have to do the above steps again.

Right, according to page 92 of the service manual there's only one cable type (part nr. 9), so that can't be a limiting factor. Furthermore, it comes with either of two graphic chipsets; NV N14P-GT or NV N14P-GT1, but that's the GT750M (or the like series), so that ought to be fine too.

And, indeed, a whopping 12 motherboard types (or so says Lenovo on page 86); you have 37/47W (2 options), HD/HD+ (2 options) and _/W8P/W8S (3 options), which means 2*2*3=12 mb types. Really ... manufacturing 12 different ones just to accommodate a few different retail options ... 12???

That can't be right, and what does W8P, W8S or " " (blank) indicate; Windows 8 P(professional, pre-installed or student?) and blank=no OS? Try and find that out, because if it is then there are no different motherboard types at all (only inventory stock nrs.) and any lcd will fit.

W8P/W8S/_ = One type of Mobo since the windows keys are written as part of the BIOS.

HD/HD+ is probably about the type with or without the M2 slot.

37/47w is self explanatory. Probably no difference there at all besides CPUID?

So in reality they only have to manufacture 4 types of motherboards, perfectly acceptable since they would mostly be the same anyway.

Thats good to hear. I havent had any troubles either. When i upgraded to 8.1 the second card didn't work but the vbios upgrade was easy to find. Now i've been thinking about the modded bios but I'm having troubles to find confidence to do it. In any case, it seems the chances for doing mistakes is little but still. Programmargorp, would you like to shed some light on the second card bios upgrade. I was just wondering that if i needed 2 dos bootable usb drives, one for bios and other for vbios? And is the file for second card attached in the op?

No. The second GPU's vBIOS is actually flashable within windows once you disable write protect on it.

2.02 bios is for core/memory overclocking, 2.04 lest you overclock voltage as well.

It does work with 8.1, however you need to flash SLI card with new bios, found somewhere in this thread.

Be warned that 8.1 is extremely buggy os and doesnt work well with SLI and y500 model in general. Well, if plan to play games on it.

No. I'm running 8.1 Pro on my Y500 w/SLI and modded 2.04 BIOS, zero issues here.

@svl7 How do you go about modifying the vBIOS for GPU1?

I'm considering creating http://forum.techinferno.com/lenovo-ibm/3593-ideapad-y500-bios-mods-overvolting-overclocked-out-box.html with the windows 8.1 compatible Ultrabay vBIOS and BIOS v 2.04.

@Lizzo @rip111

Have you tried the onekey recovery button instead of the power button? That gives you a boot menu where you can select BIOS straight up.

@ghoul does the copper heatsinks sitting on the aluminium plate actually get hot? It feels like you're just adding heatsinks on the mounting plate, which isn't actually doing much. @hannse12 I don't see why the motherboard would flex alot at all since the strain is being placed on the x plate on the other side of the motherboard. Unless you place enough pressure to actually break that (which by then you probably would have cracked the die anyway), there shouldn't be a problem.

Still would have concern about cracking the die with the extra mounting pressure from the spacers though.

I'm sorry if this has been posted but I'm having charging issues from the battery gauge reset. Will reflashing the stock bios possibly fix this issue?

Uninstall the battery driver in device manager, reboot and it should be solved.

I personally use MX-4 since the heat transfer ratings are about the same as AS5, but there isn't a curing time with MX-4.

Also have some Evercool TC-25 laying around as well. That stuff works decent too.

It depends on what you're running. My Y500 system fan (not the one in the 650M Ultrabay card) appears to spin up for no reason when I'm running stuff as well. Just not as often as once per minute.

I think fanspeed is more dependent on system load than temps.

I would be quite scared about exceeding the mounting pressure with this mod and cracking the GPU/CPU die if I went with this mod :/