i7 4770k OC - Prime95 question

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Hello everyone! Today I overclocked my i7 4770k to 4.3 Ghz at 1.25V, and it seems stable, after a bit of testing with Realbench, OCCT and prime95. This is my first OC ever. Now, when I start a "small FFT" test in prime95, my CPU temp immediately jumps above 90 degrees. I panicked, and shut it off. I'm using a h100i, but it is set to quiet mode as I find it quite loud on higher RPM. My temps were perfectly fine during OCCT: 70-75 degrees, and also during prime 95: 65-ish degrees. Is my CPU damaged? The heatsink is seated properly, I've been using the config for a year now, and it has been assembled by a system builder, not me. Thanks for your answer, I'm starting to panic :(
 
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no, youll be fine. these chips can take alot more than you think. i think at 105 degrees celcius they start to throttle, so thats just testament to their durability. you didnt have a abnormal vcore set, so you didnt burn out your chip. if you did it wouldnt be working at all. the crash can just have been the instant need of alot of utilization from the cpu, and it just caused it to be unstable and crash
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holyrage

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lol Ivy/haswell throttle temp 105C shutdown temp 125/120C @90C the chip materials wont get conductive thus it wont get damaged

oh when u OC make sure ur max TEMP FOR Normal stuff like gaming and what ever dosnt go above 79C for 24/7 u can go above that but the chip will die faster
 
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jshoop

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prime95 really heats haswell cores alot, more than the usual stress test. id remove the overclock and make sure temps are acceptable though, if you remove the overclock and it still gets to 90 it is likely a different problem
 
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Before the overclock, my temps were perfectly fine :) (haven't tested small fft though, had no reason to) Even with the OC, idle temps are around 35 degrees, even when using the quiet setting on h100i. Also, while running Crysis 3 (which, to my best knowledge, stresses the cpu quite a bit) the temp does NOT go above 65 degrees. I assume these readings are normal...if it gets hotter, I can still crank up the cooler. Will my CPU be OK at these settings, and temps?
 
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jshoop

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i think you'll be good. the other stress tests have shown reasonable temps and your in game temps are no where near too hot. if you start experiencing crashing id take a look at your temps again and back down the multiplier and vcore a little, but you should be fine without doing that
 
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Thanks a lot my friend :) I also disabled LLC in the AI suit software, from what I understand it can play hell with voltages, and I wanted to be on the safe side. It's my first OC ever, and I'm extremely nervous about breaking something :(
 
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I'm not sure, the filename was "v285". Still, if my gaming temps don't go over the threshold, I think I'll be happy....An hour of Crysis 3 took it to 69 degrees, on the lowest cooler setting =/ Thanks though, will check :)

Yeah, apparently I was using 28.5, an even newer version :/
 
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UPDATE: Apparently, version 28.5 utilizes something called "AVX" which appears to be an instruction set. Raja, a rep at the Asus forums claimed that Haswell server cpus actually clock down when they detect AVX, as it generates an insane amount of heat. I installed Version 26.6, and my temps hardly went above 70 degrees :)
 
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jshoop

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yea, that was what i was talking about when i said p95 causes excessive heat, i couldnt remember what it was. so you're good to go now, you can probably push the overclock a little higher if you put the cooler on performance mode or somethin, but like you said that causes alot of noise

have fun gaming worry free :)
 
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Thanks again :) Another quick question, if you don't mind :) I'm using CoreTemp to monitor my temps, and when playing BF4 for instance, it says: "Max temp: 68" but during gameplay, I hardly see the temp go above 65 degrees, so I guess these are just some weird temps spikes. Should I worry about these?
 
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Thanks once more! I'm playing games now as a final stability testing :) Hopefully, It will be okay :) The thing is, I consider myself a semi-power user....I love great performance, but don't have any training in IT, nor experience :( But I'm interested, and eager to learn :) Thank you again :)
 
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Sorry, just another quick question if you don't mind :( If I use the "Balanced" power plan in windows, my CPU cloks down to 800 Mhz when idle, but the voltage -since I set it manually in Bios - remains at 1.25V. is it harmful for the CPU to get a constant voltage, even when at such low clocks? Should I activate performance mode so that it always runs at 4.2@1.25?
 
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jshoop

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it doesnt matter, you can do either and it will be fine. clocking down but not dropping the vcore won't damage it, and activating performance mode won't make it perform faster since when the processor is being utilized it clocks back up
 
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Thanks! I ended up reverting to defaults though, as I crashed in FC4, something that has never happened before. I'll probably experiment some more later, but until then, I'm more comfy this way :)
 
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Yeah, it started up fine (although had to close it first as it seemed to load forever) but after it has been fine, and did not crash after 4 mins like before. My 3dmark physics score also appears to be the same as before the oc. If I reset everything back, there is no chance I've damaged anything right? I only changed Vcore and multiplier, and set those back to auto. I assume the reason of the crash is that I set LLC to minimum, as I assumed that was the cause of high temps, and it was set to max at 4.2 by default. I hope I did not mess up anything
 
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jshoop

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no, youll be fine. these chips can take alot more than you think. i think at 105 degrees celcius they start to throttle, so thats just testament to their durability. you didnt have a abnormal vcore set, so you didnt burn out your chip. if you did it wouldnt be working at all. the crash can just have been the instant need of alot of utilization from the cpu, and it just caused it to be unstable and crash
 
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