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I EPowered a reference Radeon HD 5870 and have been running into problems getting it to work. The OS I'm booting into has the correct video drivers as I installed them prior to the mod. Initially I wasn't able to get any picture but the system would boot up fine (as I could tell via boot codes, drive activity, and leds on my mouse n such). Then I looked up the memory's voltage and used 1.5V for that and I initially got picture, but it blackscreened whenever I got into the OS. I could sometimes see flashes of picture if I jostled the card around a bit but could never figure out if it's my mount or my PCI Riser cable. Right after rebooting a few times my system went into complete automatic shutdown right after hitting the power button. As in press power button -> automatic shut off. Honestly thought I killed my system. Had to revert back to my 1660Ti and reflash my motherboards bios to get my system to work again. Now after plugging it back in it boot loops after getting to code b2 (Asus Crosshair VIII Hero) even after a cmos reset. Even weirder when I go back to using my 1660Ti I get the post screen error in the last photo attached to this post. No idea what it could mean. Tried using 1.163V (which appears to be stock) and 1.35V (max the slider would go prior to epowering) for the core. Also tried remounting my waterblock and cleaning the pci fingers. I'm also making sure to apply the correct voltages as soon as I possibly can when I hit the power button. Did I kill the card or is there something I need to do to the vc to mod it correctly? I've seen another guide about voltage mods and he didn't mention anything additional about the vc in both of his posts on this card.
Well, since EVBOT having transition state currently, here's alternative solution for you, EPOWER people. Since controller accepts controls from PMBus, attached Raspberry Pi can talk to EPOWER and adjust voltages. Voltage range is 0.6 to 2.0V Tested with Model B Rev2.0 (not plus), but should work with any Pi. Details in this article for those who interested. Try it, and let me know if any problem Also old-school hardware-only way with trimpot resistor is covered too.
Haters gonna hate: http://www.evga.com/products/moreInfo.asp?pn=100-UT-0400-BR It's finally Retail & Available :banana: :nana: PDF: http://www.evga.com/products/pdf/100-UT-0400-BR.pdf Description NOTE: This device is intended only for advanced users with electronics experience. EPower board is covered by DOA warranty only. Use of this product will void your graphics or motherboard warranty. EVGA "The Untouchables" EPower board is a separate VRM board to provide additional power for target devices, such as videocard, motherboard or other devices which may need high-current low-voltage power source. Notes The EVGA EPower board is designed to operate with two voltage outputs: VCORE output - Voltage adjustment range of 800mV to 2000mV. Current source up to 400A. VDIMM output - Voltage adjustment range of 1000mV to 5000mV. Current source up to 80A. Recommended Toolkit AWG12 or AWG10 Copper Wire with Insulation 60W or 80W Soldering Iron Digital Multimeter for Resistance and Voltage Checks EVGA EVBot with X58 Firmware 80 or 120mm +12V DC FAN with 3-pin header for VRM Cooling Flux and Solder for Wire Joints MSRP: $99.99 Same price as the EVBot http://kingpincooling.com/forum/showthread.php?t=1569