Quote from: mixdio on March 28, 2014, 07:40:48 PM

- Enable VID1: Short R336 (original VMOD)
- Increase DVDD to 1.4V: Cut R46 (0R jumper) and replace with 2.94k
- Increase VDD_PLL to 1.2V: Add 27.4k on top of R212 (27.4k || 10k = 7326R)

For reference, the default VDD_PLL is 0.8 x (R211 + R212) / R212, or 1.092V.

Not getting HW errors at 1000 MHz, but I haven't tested long term because I only got my units yesterday. I'm sure 1100+ could be achieved by increasing DVDD using the above method.

It's currently stable (no HW errors, short term) at 1250 MHz (529 kH/s) at 1821 mV, with R46 being 14.7k.

Here are my R46 values and measured DVDD:

Resistance (R)	Voltage (mV)
4.32k	1450
5.90k	1509
7.79k	1581
12.1k	1734
14.7k	1821

I think I'll stop there before I damage anything

Edit: here is a microscope shot of the mods
Blue: R336
Green: R46
Purple: R212
http://i.imgur.com/ryfJsjJ.jpg

mixdio

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