So I have been tinkering with my new EVGA GTX 960 4GB Gaming. This is EVGA's newest 960. It is nothing special, just a reference / blower fan card. It is much nicer than my previous PNY XLR8 960 which had a bone stock Nvidia branded PCB. Compared to the PNY, the EVGA has a thicker custom PCB, better capacitors, 8 x 512mb Samsung chips, copper heatsink, and decent branding. This is the best 960 for my case in my opinion, which ideally should be paired with a reference designed video card.
Anyways, I am looking for some input on overclocking. I am somewhat newer to overclocking in general, and my current build is my first using an Intel K Series CPU and Nvidia GPU (I come from a long line of gaming laptops) I was originally more focused on getting my i5 4690K dialed in. I ended up settling for 4.5ghz @1.2v with that due to the cooling capacity of my build. (ITX Case, Lower Profile Heatsink)
Right now I am using EVGA Precision X. It doesn't seem quite as user friendly as MSI Afterburner, but having an EVGA card I figured it would be ideal to roll with matching software.
I have my power target at 105%, GPU Clock +173mhz, Memory Clock +400mhz.
So my card currently runs at Core 1300mhz, Boost 1351mhz, Memory 7800mhz. However, while in Unigine Heaven GPU Clock is showing 1450mhz.
I would like to get a little more out of this card. I see where people are running Core 1500mhz + and Memory 8000mhz+. I understand that my card doesn't quite have the cooling capacity that others with larger heatsinks, dual / triple fans, back plates, etc do. I am also well aware that not all silicone is equal. I have been trying to pull Core 1500mhz and Memory 8000mhz. I get artifacting / driver crashes when going this high with either of them, simultaneously or not. +400mhz on my VRAM seems to be my cap. The memory chips on my card do not have any type of heatsink on them. I am not sure if this is the issue or not but even with my current overclock my temps are fine.
The main thing I am wondering about is power / voltages. I am assuming if I wan't to push my card further, I am going to have to give it some more power. I have never messed with voltage. My 4690K was my first CPU that I manually adjusted voltages for. I have everything figured out on the CPU side, now I am just wanting to learn to tweak the GPU.
Here is a pic of my card:
Two things: What is the stock maximum voltage value, and what is the ASIC rating of the card?
I got an ITX EVGA GTX 960 (single fan, single 6-pin), arguably with the worst cooling of all GTX 960 cards. I also hit the 80C mark when I run at 100% GPU load for extended period of time.
However, I can easily overclock +132Mhz (max boost of 1549MHz) and +200Mhz to the memory. I possibly can go further, but didn't bother.
I'm told that "GPU lottery" eventually decides how far you can OC. Some cards can even OC to 1650MHz at stock voltage settings. My GPU has a 83% ASIC rating and runs at 1206mV out of the box.