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UPDATE: ALL DOWNLOADS LISTED IN THIS POST FOUND HERE. Nvidia 'Kepler' GPUs - modified VBIOS files >>> NOTE: More versions (including voltage mods) exclusive for T|I users can be found in the second post. <<< The 'Kepler' GPUs from Nvidia perform really well, even at increased clocks speeds they stay quite cool - a perfect behavior when it comes to overclocking and improving the performance. Unfortunately the mobile GPUs suffer from an artificial +135MHz core overclocking limit, so you can't go higher by using tools like Nvidia Inspector and similar. The modified VBIOS files listed here have this limit unlocked, some have increased stock clocks or tweaked voltages. Just refer to the description. All files have been modified by myself, if you like them feel free to buy me a drink, donation link can be found below GTX 660m: 660m_OC_edition__VBIOS_[DELL].zip- comes with unlocked software overclocking limits 660m_GHz-Edition_overvolted_VBIOS_[DELL].zip - default 3d clock 1000MHz, base boost 1200MHz,, memory (3d) 1350MHz, increased 3d voltage undervolted editions possible, depends on interest, tba Some screenshots: GTX 680m: Clevo_680m_-_80.04.33.00.10_'OCedition'_revised_01.zip Dell_680m_-_80.04.33.00.32_'OCedition'_revised_00.zip Increased software overclocking limits & optimized for no throttling. Read the included 'Read me' file before flashing. Instructions: I recommend flashing under DOS using nvflash . Donation link in case you want to buy me a beer Thanks and cheers! More to come. Testers: Thanks @eliteone (Dell 660m), @littleone562 (Dell 680m) For all mods: Use at your own risk.

This mod is pretty exciting since it bypasses the PCB tracks and any concerns with them not being design to supply 75W. I took a closer look at the right angle PCIe connector on the board to try to determine if it can carry that much power safely. The part is a Meritec 98317A-164-2MMF 100 ohm right angle connector. Here's the relevant datasheet from the manufacturer's website and some key info: Meets PCIe 2.2, 100 ohm, specifications (...) Contact resistance: 40 milliohms nominal Dielectric withstanding voltage: 300VDC Current rating: 1.1 AMP per contact Insulation resistance: 100 Mohms (minimum) The PCIe interface has 5x +12V lines and 4x +3.3V lines. With 1.1A per contact, this connector tops out at ~80W (5.5A at 12V + 4.4A at 3.3V = 80.52W) and thus can supply PCIe spec 75W safely. Knowing this, I'm more inclined to try out this mod myself. Btw, the capacitor on my powered riser is a 6.3mm x 8mm solid aluminum one labelled "FP 99HE 101 16" (Fujitsu 99HE series 100uF 16V).

I think it is safe to do that.

Removed: My reply ended up in the wrong thread... - - - Updated - - - My standard Bootcamp installation on a 13" Retina MacBook Pro is with EFI. So I think that all Retina models starting from late 2013 have EFI. You can check this but I forgot how. The Sonnet SEL solution worked for a few guys in this forum but that solution is too expensive in Europe (twice the US price) so I will wait a bit until the cheaper AKiTiO solution becomes available in Europe. I also prefer to be able to use the case (with some extra ventilation) and a short GeForce 960 (ITX) if that comes available in oktober (as rumored).