In Corey's SB mobo experience thread I wrote I've been having a sudden onset of BSOD's. I have loaded optimized BIOS settings and all settings are back to normal. A bit frustrating cause I did enjoy FSX at 4.5 GHz but I really do need to get to the bottom of the BSOD. They started about 1.5 weeks after applying the overclock.I hope it's a simple voltage problem but I really don't know how to tell because nothing happened for that week and a half. Temps were around 65 at te very max when running OCCT, so I doubt it was a temp problem.Anyway, I'm going to run memtest boot CD, so if the guru's could follow this thread and hopefully help me get back to 4.5!!

In Corey's SB mobo experience thread I wrote I've been having a sudden onset of BSOD's. I have loaded optimized BIOS settings and all settings are back to normal. A bit frustrating cause I did enjoy FSX at 4.5 GHz but I really do need to get to the bottom of the BSOD. They started about 1.5 weeks after applying the overclock.I hope it's a simple voltage problem but I really don't know how to tell because nothing happened for that week and a half. Temps were around 65 at te very max when running OCCT, so I doubt it was a temp problem.Anyway, I'm going to run memtest boot CD, so if the guru's could follow this thread and hopefully help me get back to 4.5!!

Hi Ryan,I remain suspicious of your PSU. When I first saw that it was only 750w I wondered if it would be enough under full load. Even though theoretically it should (barely) be enough, I suggest you replace it with at least a major name brand 850w or better. It seems to me what you are describing can be first and best attributed to a power problem. Replace it and displace the BSOD, I think.Kind regards,

It's a Seasonic (very high quality), 60A+ on the 12v rail (plenty of power) - I'm not saying it isn't the PSU, but I am saying it's a quality well-known brand. Really 750w is plenty for my system. If I were running dual GTX 580's I would be concerned. Most people buy way too much of a PSU for their system.Thanks for the error codes, I had a copy of that saved to my desktop. If I had to guess I'd say it was a vcore issue.1) I set RAM to XMP profile1 (which was set before), manually setting everything seems to give me problems2) Will run Memtest boot cd before I go to work today

I would start with investigating PLL overvoltage. Did you take a look at this? The reason I suspect PLL is because it seems to have proved rather troublesome for motherboard manufacturers in general. Some BIOS versions (both Gigabyte and Asus) have it enabled, others disabled. If it's been that troublesome, it's likely that it's a source of instability.If that doesn't seem to make a difference, then I would move on to exploring memory issues. Which LLC setting are you using, and what's available on the UD4? What BIOS version are you using? You might actually try switching to one of the beta bioses released prior to the official version I think you're using. I feel like I read that some of the guys at xtremesystems were not liking the latest official bios as much.

Stephen may be right BUT before spending $$$ on a new PSU make sure you test everything else starting with the rams cause it would be a bummer to replace the PSU and having BSOD again.Like I said in the other thread, test one stick at the time 10 passes each time, if the stick is good replace it with the other one and test it the same way.All BSOD I had were rams related when I was overclocking my rigs from scratch to get to a stable OC, if you have enough voltage (CPU wise) and still get BSOD after testing the rams your PSU may be the culpit or some voltage settings may be off. I am a little surprise to see a lot of guys having this problems with their 2600K, compare to the old way of overclocking (like my rig) the SB is "kinda" overclocking for dummies 101 (not laughing at you guys) I mean it's so easy, not much to do really. Good luck Ryan.

I would mess with PLL voltage. If that doesn't seem to make a difference, I would start exploring memory issues. Also, which LLC setting are you using, and what's available on the UD4? What BIOS version are you using?

I am running f3b, and there's only enabled or disabled for the LLC. On the last settings I had PLL set to 1.76 like you recommended. Default is 1.80So many options of what could be wrong lol

It's a Seasonic (very high quality), 60A+ on the 12v rail (plenty of power) - I'm not saying it isn't the PSU, but I am saying it's a quality well-known brand. Really 750w is plenty for my system. If I were running dual GTX 580's I would be concerned. Most people buy way too much of a PSU for their system.

Ryan - is that a single 12v rail or is the 60A split between two rails? It makes a difference depending on how you've cabled your system.Vic

Ryan, try taking PLL down to 1.74, perhaps even 1.72 and see what that does.

So many options of what could be wrong lol

So many opportunities to find a fix

Hello The Seasonic 750 has a single 12v rail with 62 amps availableThe GTX570 only requires 38 amps so the PSU is more than adequate unless of course it is faultyThey don't come any more major name than Seasonic in the world of PSU's.That is why Corsair use Seasonic to build their better HX series

Ryan, try taking PLL down to 1.74, perhaps even 1.72 and see what that doesSo many opportunities to find a fix

I take it you're an optimist? Before I go changing the innards I'll test my RAM. Here's the PSU label for you skeptics :Nail Biting:

Ryan - is that a single 12v rail or is the 60A split between two rails? It makes a difference depending on how you've cabled your system.Vic

HelloSingle 12v rail @62A with 744 watts available on this 12v rail.More than enough for a single GTX570

What Vcore at full load did you have for 4.5GHz Ryan?

I was running 1.34 vcore (in bios) for about 1.5 weeks when I got my first BSOD. It would fluctuate SLIGHTLY to around 1.35 under full load. The cause of the BSOD certainly could be something simple such as too low of vcore.

Definitely an optimist! From here it's just elimination of variables. Even with a bad CPU, 1.34v should be more than enough vcore for 4.5GHz. But for the sake of absolutely eliminating vcore as a variable, perhaps you could take it up to 1.36v in BIOS for the time being. Also, we need to know three critical voltages (BIOS, idle, and load). You have covered BIOS and load, but I'm curious to see your idle voltage (preferably read from EasyTune 6). Just to make sure, are the BSODs occurring at idle or at load?

Also, we need to know three critical voltages (BIOS, idle, and load). You have covered BIOS and load, but I'm curious to see your idle voltage (preferably read from EasyTune 6). Just to make sure, are the BSODs occurring at idle or at load?

They all occurred when I was running FSX. Though they didn't start up until a few days ago. This is what gets me... why now?ET6 numbers:3.3v - 3.363 idle5v - 5.021 idle12v - 12.319 idledram - 1.5 (all the time)cpu - 1.236 - idleI just got talked with support at Seasonic and the guy said those psu voltages are within tolerance.***************HEADS UP************I'm going to sit at these stock bios settings (except ram is XMP profile 1) for a bit. I just want to make sure things are normal before I start screwing with settings again.