Originally Posted by DraculaxAOE
Could you please explain why lower temperature i.e. manual fan can reduce artifacts? I thought artifacts are produced as a result of heavy mem oc, when data moves thru the mem faster than it can handle.
BTW, I'm using RV02-E and my Lightning can hit 1333mhz/+643 stable with LN2 bios, tested in Witcher 2 with ubersampling on. It seems the Kayran place is a great location to check for visual artifacts. I've seen artifacts when I did +652 but not for +643 on the memory.
Also, I do think the vertical mounting in my chassis reduces TF4's cooling efficiency. Mine is hitting 75C at that stable clock when fully stressed, fan @ 85%. While it seems the other people in this thread only hit the upper 50's C after OC
Artifacts can happen with any unstable OC. You guys are focusing on core temp too much, the VRM temp is hidden and is very much affected by fan speed, and it is not reported by afterburner. The VRM does not have a ton of heatpipes connected to it to prevent heat buildup, that is the critical difference between VRM temps and core temps. This has been the case with all aftermarket GPUs i've owned - with my lightnings I cannot get 24/7 stbale operation at 1352 in SLI unless I use manual fan 70% or greater. If I use auto fan I lock up in heaven or get artifacts. Take this for what you will, its like overclocking a CPU without proper cooling...core temp doesn't tell you everything.
I'm actually in disbelief that people insist on using auto fan with high overclocks, to me it seems utterly ridiculous because a few years ago it was common knowledge that high overclocks with any GPU = manual fan no matter what, i'm not sure what has changed and why people have shifted their mindsets. It was not like that a few years ago....i'm not sure if some people are relatively new to oc'ing gpu's or what. It does seem like people demand more for less as the years have gone by, high overclocks aren't free (in terms of temps/fanspeeds)
edit: it is odd to see this rash of new posters who have just registered with their 1st post talking about a MSI lightning experience and then disappearingEdited by xoleras - 7/15/12 at 10:02pm