I did see an interesting thread on a different forum where someone over clocked a 4770k with the stock cooler to 4.4 at 1.23v and it sat at 66c during stress test, eventually it crashed, most believed to low if voltage at some point but still very good cpu he got compared to the countless threads I've seen of ppl running them stock with a h100 and still having higher idle temps then his stress temps, he was also able to run the cpu at 4.0 and 4.2 while under 1.0v, I believe he had 4.2 at. Manual/offset which most prefer I believe and the newer one of them the adaptiveĪlthough JJ warns if ur using adaptive don't use synthetic tests like prime95 as it can add a multiplayer to our voltage and make it jump to awful and way way to high of voltagesĪlthough the haswells seem to have nothing in common from 1 to another, some over clock some don't, some that over clock then can't over clockram, some can, some can get oover clocked and still under load sit around 50-60c while some stock right out ta the box with a decent cooler and no over clock sit at the same temp lol, pretty much the haswell lottery lol I tested on around 7 290/290X cards and every card encounters the same problem.I'd say exactly what Nate said, also JJ from Asus has really good videos on over clocking auto(which most users I've seen run into issues with Or the GPU which does not like too high voltages. According to me, the causes may be either the VRM circuitry, not stable enough for high voltages. Furtermore, I thought that the cause might be the RAM overheating but even at the beginning of benchs, when the RAM is cold, the problem appears. I am not sure that it is the cause when I see our temperatures. Your conclusion is the heat too high for watercooling.
I am watercooled : the GPU does not exceed 45?C and the VRM1, 60?C. I must diconnect the DVI cable to have a crisp image. On the other hand, with DVI, instead of black screens, the display flickers, becomes blurred randomly. watched your video and I face with the same problem : by using Displayport, the display becomes black randomly when I apply about 1.35 V with ASUS GPU Tweak or +160mV with Sapphire Trixx. id you are having the same problems as I did, there is your answer. Check it out to see what I am talking about. darn it took my 6 cards to find a golden one. Here is a short video I made of a complete run of heaven at 1340/1677Mhz on ambient temps H2O, I selected and only showed the last 2 test #25 and #26 because heaven last almost 5 minutes to run lol, the fps starts very strong from test 1 all the way until test 10 fps are 186 max, average 182 ,then it takes a big performance hit after test 11 once the card is warm game over :/.
next will be full volt mods and LN2 to make it scream. I guess finally I found a Golden card, I am happy as a dog with 2 tails. Big Thank You to Crustytheclown for all the help. The problem is related to the video card throttling down during heaven, it does it 1340/1677Mhz stable and pass heaven DX11 extreme on water full cover EK H2O block, but the card starts throttling at test #11 once it gets warmed up the clocks goes up and down as well as the FPS ,performance take a nose dive due to the v.core set at 1.43v real via DMM reading, water cannot handle that much heat, LN2 required for stability.
Thank you for trying to help me Ace123, apretiate it.įinally I have an answer after many many long hours testing and re-testing my 290x with every driver available and 3 different OS w7 installations, card has not been volt moded yet.