Budget 2500K First Time Build
- Thread starter SMed
- Start date
You ran it for 35 minutes?! Wow
Way too much, even 20 minutes is considered overkill by many. If it was my PC, I'd say 35 minutes is stable enough... For more stability you could try changing V core and dropping multi... But I think it is stable, so just try it with lower Vcore at same freq.
Don't worry, unless you change blck (or something) settings or go above 1.4 on Vcore, your chip should be safe.
Yep, factory OC is pathetic. Say stock 460gtx is 700Mhz, and factory OC (for which people pay extra money too) can be 725Mhz or even "MASSIVE" 740 
... I have overclocked my 460gtx to 850Mhz which took it to about stock 470gtx performance.
Download program called MSI Afterburner, and move the sliders for "Core Clock" and "Shader Clock". Run stress program inbuilt in Afterburner (Kombuster). All within Windows
... I have overclocked my 460gtx to 850Mhz which took it to about stock 470gtx performance.Download program called MSI Afterburner, and move the sliders for "Core Clock" and "Shader Clock". Run stress program inbuilt in Afterburner (Kombuster). All within Windows
Well I had a minor catastrophe. 
I left it at 4.5GHz and went off to eat and chill for an hour or so. I think I left the PC just running/idling. It's set to go on standby after 30 minutes.
Came back, PC was off and every time I pressed the power power button to wake it back up, the lights would come on and fan would spin up for about 1-2 seconds, then die again. It would then do this on it's own every 5 seconds without me pressing the power button.
So I pressed and held the power button down until it stopped trying to do this. Then I'd press the power button again and it just did the same thing. The screen remained black the entire time.
So I took switched off the PC at the PSU, opened the case and reset the CMOS. Tried booting up, but same problem. Case light came on, fan spun up, for a second, then died and it kept repeating this on its own. It would start up for a little longer now, maybe 3-4 seconds, but still no display signal. I reset the CMOS again, and it started up and stayed running but absolutely no display signal. I tried using the onboard mobo graphics, nothing. I had no display image whatsoever.
This time I took out the GPU and reset the CMOS again. Plugged the monitor in the onboard mobo graphics. I took a few attempts, but after the 3rd or 4th try, it finally started booting up and stayed running. I shut it down and put the GPU back in, and it seems fine again on stock clock.
I'm hoping this is just due to an underpowered PSU. Bricks were ****!
I left it at 4.5GHz and went off to eat and chill for an hour or so. I think I left the PC just running/idling. It's set to go on standby after 30 minutes.
Came back, PC was off and every time I pressed the power power button to wake it back up, the lights would come on and fan would spin up for about 1-2 seconds, then die again. It would then do this on it's own every 5 seconds without me pressing the power button.
So I pressed and held the power button down until it stopped trying to do this. Then I'd press the power button again and it just did the same thing. The screen remained black the entire time.
So I took switched off the PC at the PSU, opened the case and reset the CMOS. Tried booting up, but same problem. Case light came on, fan spun up, for a second, then died and it kept repeating this on its own. It would start up for a little longer now, maybe 3-4 seconds, but still no display signal. I reset the CMOS again, and it started up and stayed running but absolutely no display signal. I tried using the onboard mobo graphics, nothing. I had no display image whatsoever.
This time I took out the GPU and reset the CMOS again. Plugged the monitor in the onboard mobo graphics. I took a few attempts, but after the 3rd or 4th try, it finally started booting up and stayed running. I shut it down and put the GPU back in, and it seems fine again on stock clock.
I'm hoping this is just due to an underpowered PSU. Bricks were ****!
Seems the core voltage and shader clock are locked on the Asus 6850. I bumped the core clock to 850MHz and ran Kombuster for about 12 minutes (8X MSAA, full screen, Post-FX, GL2). Temperature peaked at 71 degrees after about 5-6 minutes and hovered around 68 degrees for the rest of the time.
Wow, terrifying story! Glad that your PC sorted itself out, cant really think whoat could have caused it... Unless you left it running stress tests and not idling and it overheated or bridged? Maybe the stress program didnt close properly? Are you sure you didnt exceed the 1.4V for Vcore and your recommended V for RAM? Scary stuff, I feel for you!
After setting the OC settings (ie multiplier and DVID) you should reoot straight back into BIOS and check what effect your DVID settings has on Vcore (this screen) , Vcore should always be less than 1.4V
So now, I take it, you've plugged the GPU back in and system runs normal @stock clocks again? Hmmm... Maybe it was the PSU, but then why didnt it boot with stock clocks?.. Or maybe CMSO reset didnt work?.. Very strange
After setting the OC settings (ie multiplier and DVID) you should reoot straight back into BIOS and check what effect your DVID settings has on Vcore (this screen) , Vcore should always be less than 1.4V
So now, I take it, you've plugged the GPU back in and system runs normal @stock clocks again? Hmmm... Maybe it was the PSU, but then why didnt it boot with stock clocks?.. Or maybe CMSO reset didnt work?.. Very strange
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To unlock Vcore in Afterburner:
I didnt change Vcore myself, forgot all about it to be honest
But you should also up Memory CLock (mine is stable at 2150 on stock Vcore).Ah, I didn't know this. I have no idea what vcore was after changing the settings. So vcore changes automatically?
So now, I take it, you've plugged the GPU back in and system runs normal @stock clocks again? Hmmm... Maybe it was the PSU, but then why didnt it boot with stock clocks?.. Or maybe CMSO reset didnt work?.. Very strange
Yeah, I put it back to normal, but then went back and just put the multiplier to 40 for 4GHz, and didn't change anything else. I also left the GPU at 850MHz (didn't change anything but the core clock tbh). Just got finished playing a few hours of Dues Ex and all seems fine. CPU temp was at 38 degrees, didn't check the GPU temp.
To unlock Vcore in Afterburner:
I didnt change Vcore myself, forgot all about it to be honest
What about shader?
Shader and Core Clock are hard linked together like volume L and R channels in audio. At least they are in my Afterburner.
So increase in Core Clock increases Shader setting.Well, you change DVID and this leads to change in Vcore, but you only get to see that change after reboot. Looking at your CPU-z screenshots, your vcore was well under 1.4, but I do not know what you changed prior to your "minor catastrophe"
Waht about your RAM- is it rated 1.5 or 1.6V? RAM should ran at its native voltage. Did you disable Turbo? Leaving it "on" can cause instability to OC...
Well, you change DVID and this leads to change in Vcore, but you only get to see that change after reboot. Looking at your CPU-z screenshots, your vcore was well under 1.4, but I do not know what you changed prior to your "minor catastrophe"
I didn't change anything really. It ran for 35 minutes on Prime at 4.7GHz, then blue screened. I put it down to 4.5GHz and did a 15 min Prime run which was fine. I'm fairly positive I turned Prime off, but when I came back, all that crap happened.
I think my RAM is 1.65V? It's reviewed here: http://www.hitechlegion.com/reviews/memory/16009
I'm not sure about those other things, I think I turned it off. If that guy on that other thread mentioned it, then I did it.
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You may ask in the RAM forum here about your RAM settings, I specifically bought 1.5V RAM as I got confused when doing research on it whether 1.6 had to be undervolted or ran at its rated V...
So you didn't even make changes to DVID? Which thread on CPU OCing did you refer to- this one: http://forums.overclockers.co.uk/showthread.php?t=18365652 ?
So you didn't even make changes to DVID? Which thread on CPU OCing did you refer to- this one: http://forums.overclockers.co.uk/showthread.php?t=18365652 ?
No, this one: http://forums.overclockers.co.uk/showthread.php?t=18375640
And that's all. With those settings, I just set multiplier to 47x.
I didn't see that one, may give that one a go.
I tried all sorts of apps for OCing the GPU, nothing would change the voltage. I tried Asus Smart Doctor, but it kept saying "Cannot Find Graphics Card". I did the cfg modification to Afterburner but it did nothing. Weird.
Anyway, so I got Asus' GPU Tweak and it works fine. I linked the voltage to the clock and bumped the clock to 900MHz and it stuck voltage to 1225mV. Memory clock is 1000MHz. Ran Kombuster for 10 minutes and temps stayed at 80 degrees for most of that. This is with the CPU at 4.0GHz.
The first Kombuster run was with a custom fan profile. When I run the fan on auto, it stayed at 71 degrees, but with a brief peak of 74 degrees after about 4 minutes, then dropping to 71-72 for the rest of the 10 minutes. Auto was much nosier, my custom profile was barely louder than idling.
I think I put DVID to +0.05V. I need to check about this RAM voltage, but most places I've found tend to say 1.65V is still ok and shouldn't be a problem.
