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Overclocking i5 3570k 4.8GHz on air - problem?

Tags:
  • Overclocking
  • Cooler Master
  • Heatsinks
  • Intel
  • Cooling
  • Asus
  • 3570k
  • digi vrm
  • CPUs
Last response: in Overclocking
May 2, 2014 3:22:02 PM

I overclocked the chip from 4.2 by 0.1 GHz increments. It started throttling at 4.9 so the maximum I reached was 4.8. I tested it with Prime95, AIDA64 and Crysis 3 for 5 minutes apiece (longer in Crysis 3).

It seemed stable. One crash occurred in Prime95 but this was the last test so the PC was already hot. I only changed the multiplier and left the voltage to the DIGI+ VRM on the motherboard.

Under Load
Max CPU temp: 52 C
Max Core temp: <105 C (avg 90-5)
Max VCore: <1.4 V (avg 1.336)
Throttling: 0% (4%+crash on 4.9 GHz)

When I first started this, I read of people only reaching 4.2 without changing Vcore, and 4.5 on air max. Should I be worried about these temperatures, or was I lucky in the silicon lottery?

Also, how many extra years have I got out of the CPU before considering upgrades, going from stock 3.4 to 4.8?

Screenshots of motherboard settings: https://www.dropbox.com/s/fvjemlb26ie1gve/140502222326....; https://www.dropbox.com/s/uxmnclzmtofyto7/140502222314....; setup listed in signature.

More about : overclocking 3570k 8ghz air problem

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May 2, 2014 3:29:12 PM

1.3v exactly is considered water only range. 4.8 on 1.3 isn't bad (Never want over 1.3 really.) but 90-95c is. You want to see ~80-85C max.
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May 2, 2014 3:33:47 PM

I don't really have space for water cooling. Should I lower the multiplier?
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May 2, 2014 3:49:58 PM

icraft said:
1.3v exactly is considered water only range. 4.8 on 1.3 isn't bad (Never want over 1.3 really.) but 90-95c is. You want to see ~80-85C max.


Just to clarify, I'm getting core temps of 50-60 C in Crysis 3 and 80=>90=>100 C in Prime. I can't think of any real world performance/games more demanding than Crysis 3. Is my CPU definitely in danger?
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a b à CPUs
May 2, 2014 4:08:56 PM

Not, in danger, but what is/are your gpu(s)? as my 290x isn't bottlenecked by my 3570k at 4ghz.
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May 2, 2014 4:40:52 PM

combine1237 said:
Not, in danger, but what is/are your gpu(s)? as my 290x isn't bottlenecked by my 3570k at 4ghz.


7970 GHz (Gigabyte Windforce)

I'm noticing a huge difference in day-to-day tasks as well, web browsing, text editing, etc.
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May 2, 2014 7:11:37 PM

I got it down to 4.3 GHz
Max V 1.280 (from 1.320)
Max T 82 C (from 90-100)
Avg T 70 - 75 C
57W (from 66+)

Lower than I hoped but I'll make do
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a c 151 K Overclocking
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February 14, 2015 2:44:16 PM

Guys,

Do NOT run any versions of Prime95 later than 26.6. Here's why:

Core i 2nd, 3rd and 4th Generation CPU's have AVX (Advanced Vector Extension) instruction sets. Recent versions of Prime95, such as 28.5, run AVX code on the Floating Point Unit (FPU) math coprocessor, which produces unrealistically high temperatures. The FPU test in the software utility AIDA64 shows the same results.

Prime95 v26.6 produces temperatures on 3rd and 4th Generation processors more consistent with 2nd Generation, which also have AVX instructions, but do not suffer from thermal extremes due to having a soldered Integrated Heat Spreader and a 35% larger Die.

Please download Prime95 version 26.6 - http://windows-downloads-center.blogspot.com/2011/04/pr...

Run only Small FFT’s for 10 minutes.

Use only Real Temp to measure your Core temperatures, as it was designed specifically for Intel processors: Real Temp - http://www.techpowerup.com/downloads/2089/real-temp-3-7...

Your Core temperatures will test 10 to 20C lower with v26.6 than with v28.5.

Please read this Tom’s Sticky: Intel Temperature Guide - http://www.tomshardware.com/forum/id-1800828/intel-temp...

Thanks,

CT :sol: 
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