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post #19651 of 22346
me 4.8 1.35 for over a year hits 80c in aida64 for over a year no problems at all 32gb ddr3 2400
post #19652 of 22346
So I did some playing last night and this is what I learned.

49x Multiplier @ 1.299 volts is pretty stable for gaming and most benches, not for encoding
up the v-core to 1.315 and we're cruising in encoding (encoded a 2 hour 1080p video file into an MP4 from MKV as my test bench, temps maxed at 81)

50x Multipler @ 1.32 v posts, runs games, and gaming benchmarks (Firestrike Ultra / extreme) try to run cinebench it crashes half way through

OK up the vcore to 1.35v make it half way through cinebench and it crashes (temps never exceed 80) voltage error

OK 49x multi 102.05 on BCKL to get 5.002ghz @ 1.355 v

Finishes bench mark, and then crashes. Stable elsewhere.

Downclocked ram from 2400 CL 9 to CL 11 stock timings @ 1866 mhz - downclocked uncore from 46x to 42x with a drop in voltage from 1.2 to 1.15v
Repeated.

Crashed when cinebench started.

Back to 49x, 2133 mhz ram @ 9, 10, 10, 27 @ 46 uncore 1.225 v and 1.315v on core and things are back to perfect.

After 3 more hours of tinkering, this looks to be the best my chip can handle aside from using 5.0 only for gaming benchmarks (xtu makes it half through the bench then crashes. XS bench completes)

Any further suggestions to break that 5.0 barrier? 49 @ 101.5 BCKL is stable at 1.35 volts FWIW. Temperatures are not even close to being an issue. I haven't crossed 85 in any of the testing at 1.35v, but I did not want to push it past this.

Should I adjust the initial input voltage from 1.85v? should I set an eventual input voltage instead of auto it?

So close I can taste being stable at 5 guys!
post #19653 of 22346
What's your input voltage? At the 1.35v+ level a fair amount may be needed.
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post #19654 of 22346
Quote:
Originally Posted by jdorje View Post

What's your input voltage? At the 1.35v+ level a fair amount may be needed.

1.85 for eventual and initial
post #19655 of 22346
I need at least 2.05 for my 4.7@1.36 profile.

Sa and dram voltages also had to be raised.
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post #19656 of 22346
Sorry to go off topic from the current conversation, but quick question! For long term gaming computer, think 5 years, a 4790k or a 4690k? Been seeing benchmarks for those two and they are pretty much neck to neck for video games, production is another story, but that's not the point! Yes, it will be OCed to whatever I can reasonably get it to. I'm coming from a G3258 @ 4.4 Ghz. I realize the $100 price difference, and that the 4690k goes on sale more often, but that's okay.

Thanks!
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post #19657 of 22346
4790k is around $300 at jet. It's been lower but may not drop again.

Either is fine for you. 4790k ocs 100-200 mhz (2-5%) higher. Hyperthreading makes zero difference in average fps in every game. It will give a boost to min fps. The larger 4790k cache can help in a few games, maybe. Worth $75 for gaming? Not really.
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post #19658 of 22346
Just finished my custom loop, and I delided my 4790k for good measure too.

I thought I'd see what it can do.

4.8Ghz



4.9GHz



The 4.8Ghz is incredible!

The 4.9 is good, but its hard to sell it to myself considering the extra voltage over the 4.8GHz overclock TBH

I had a quick go at 5GHz. I tried up to 1.38v, but that crashed after about 12 mins of realbench, so probably need 1.4v+ to be stable I think.

Oh, and this was me getting 4.9GHz pre-delid on air with what were considerably (~5c) cooler ambient temps.

post #19659 of 22346
Quote:
Originally Posted by new boy View Post

Just finished my custom loop, and I delided my 4790k for good measure too.

I thought I'd see what it can do.
Warning: Spoiler! (Click to show)
4.8Ghz



4.9GHz



The 4.8Ghz is incredible!

The 4.9 is good, but its hard to sell it to myself considering the extra voltage over the 4.8GHz overclock TBH

I had a quick go at 5GHz. I tried up to 1.38v, but that crashed after about 12 mins of realbench, so probably need 1.4v+ to be stable I think.
Warning: Spoiler! (Click to show)
Oh, and this was me getting 4.9GHz pre-delid on air with what were considerably (~5c) cooler ambient temps.



You may be surprised... After 4.9, my delidded 4790K, hit a voltage wall.... It took 4.98vCore to pass IBT on Very High. The same for 2 hours of RealBench...
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post #19660 of 22346
Warning: Spoiler! (Click to show)
Quote:
Originally Posted by reptileexperts View Post

So I did some playing last night and this is what I learned.

49x Multiplier @ 1.299 volts is pretty stable for gaming and most benches, not for encoding
up the v-core to 1.315 and we're cruising in encoding (encoded a 2 hour 1080p video file into an MP4 from MKV as my test bench, temps maxed at 81)

50x Multipler @ 1.32 v posts, runs games, and gaming benchmarks (Firestrike Ultra / extreme) try to run cinebench it crashes half way through

OK up the vcore to 1.35v make it half way through cinebench and it crashes (temps never exceed 80) voltage error

OK 49x multi 102.05 on BCKL to get 5.002ghz @ 1.355 v

Finishes bench mark, and then crashes. Stable elsewhere.

Downclocked ram from 2400 CL 9 to CL 11 stock timings @ 1866 mhz - downclocked uncore from 46x to 42x with a drop in voltage from 1.2 to 1.15v
Repeated.

Crashed when cinebench started.

Back to 49x, 2133 mhz ram @ 9, 10, 10, 27 @ 46 uncore 1.225 v and 1.315v on core and things are back to perfect.

After 3 more hours of tinkering, this looks to be the best my chip can handle aside from using 5.0 only for gaming benchmarks (xtu makes it half through the bench then crashes. XS bench completes)

Any further suggestions to break that 5.0 barrier? 49 @ 101.5 BCKL is stable at 1.35 volts FWIW. Temperatures are not even close to being an issue. I haven't crossed 85 in any of the testing at 1.35v, but I did not want to push it past this.

Should I adjust the initial input voltage from 1.85v? should I set an eventual input voltage instead of auto it?

So close I can taste being stable at 5 guys!

Those are insanely good voltages and temps! All I got at 1.32v was 4.7.....biggrin.gif
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