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Haswell Overclocking Guide [With Statistics] - Page 1867

post #18661 of 19536
Latest beta of HWiNFO64 + screenshot.
    
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post #18662 of 19536
Hello guys i have stable OC 4.2ghz: vccin=1.800, vcore=1.125, vring=1.208 auto. It is good or bad cpu i got? 4790k
post #18663 of 19536
Seems like decent voltage for 4.2Ghz, only way to really know is to keep bumping the multiplier and find out what voltage to run say 4.5Ghz or more depending on what you want. Be sure to monitor temps too though.
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post #18664 of 19536
After delid I got 47x stable on my 4690k. It's at least .02V lower than it would have been previously (1.37V was not stable).

VID: 1.36 (1.380 vcore)
Uncore: 40x / 1.15V
Input: 2.05V / auto LLC
+0.2V SA
+0.1V IOD/IOA
1.66V DRAM (yes its necessary even with ram at stock)

Temps stay under 80 in stressing; mostly in the 60s in normal usage.

According to my math I could probably get 48x at about 1.43V VID aka 1.45V vcore. But I couldn't run x264 at that temp even. I think I could run folding@home. Is the voltage too high to bother?

I've started using prime95 a fair bit for stressing. Version 28.7 (latest) with custom 1344-1344 (dunno why those numbers but I'm scared to change them) in-place. Finds instability like a god - on an unstable 44x overclock it finds instability within 15 seconds while x264 takes ~15 minutes. Temps are decent, slightly hotter than x264 but still runnable at 47x.

For stressing I remove the front cover of my s340. Makes a 3-5C difference in temps at a delta of 60.

EDIT: forgot to mention. I have turbo enabled with a 1-core of 48x. Doesn't seem to get triggered very often. Stressing it was "easy" inasmuch as I just enabled 1 core in the bios and booted and stressed for a bit. But I can't be sure the 1 core that is enabled when I did that is the same as the 1 core that will be enabled if the turbo hits. Still there's a lot of leeway in the 1-core stability voltage so I doubt it's unstable. Sadly I could not get 2 core at a reasonable voltage. Thanks to whoever suggested this, either on this thread or the DC one.
Edited by jdorje - 1/17/16 at 7:32pm
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post #18665 of 19536
Finally got my new PC desk and fired up my rig again.
Did a profile and BIOS reset to start all over again.

Results so far:

CPU Model: Intel Core-i7 4790K delidded
Stock VID @ 4Ghz: 1.008V
Stock VID @ Turbo (4.4Ghz): 1.1490V

CPU Speed: 47 x 100 = 4.7Ghz
CPU Vcore: 1.25V (Offset mode + 0.1V (1.1490V + 0.1V = 1.25V)

Cache Speed: 42 x 100 = 4.2Ghz
Cache Voltage: 1.12V

Memory speed: 2000Mhz
Memory timings: 10-10-10-30-1

Still testing all the above for stability.
It runs the following tests without problems:

Intel XTU CPU Stress Test 6 hours
Intel XTU MEM Stress Test 6 hours
Intel XTU Benchmark
x264 Stress Test 5 loops @ high priority
3DMark Steam Edition all tests

Also games run butter smooth without crashing:

- Assetto Corsa
- Project Cars
- Borderlands The Pre Sequal

I'll post some screenshots tonight.
Edited by koekwau5 - 1/18/16 at 4:30am
post #18666 of 19536
I've been fighting my 4770k for two years. With a TR Archon double-fan cranked tight to the cpu, and 2 140mm front case fans blowing onto the case, and 2 120mm top case fans blowing onto the RAM, I got good temps on OCCT AVX loads (80c w/o hyperthreaing, 86c w/hyperthreading on) with vcore at 1.33v actual, and similarly high voltages elsewhere.

But I could NOT get it stable even on one core at 45 GHz, even at 1.40v.
I got it stable at 44/44/44/43 GHz at 1.38 vcore, but didn't feel comfortable at that voltage. That was at a cache ratio of 39, and DRAM at 1600.

After setting every single setting mentioned in http://rog.asus.com/254052013/maximus-motherboards/recommended-settings-for-overclocking-maximus-vi-motherboards/ I am at 4.3 GHz 41 cache ratio at 1.31v vcore. I was able to get my DRAM to 2400 11-12-12-29 1T at 1.67v. Four sticks, 32 GB (tried a Ram Cache for Lightroom). This is my first memory OC.

How do you recover from a DRAM-caused boot loop? I ended up switching the Maximus's BIOS to the second BIOS chip. Of course, I then lost all the BIOS settings I had used, because I didn't think to copy BIOS changes to the second chip, nor did I copy them to a USB stick. Then again, maybe flashing the second chip and starting fresh helped me get where I am...?

My DRAM latency is 47 ns. What would I have to do to get it down to 43 ns? I don't want to go higher in voltage, and can't pass Memtest at slimmer timings. What are other people running to get those latencies?
post #18667 of 19536
Quote:
Originally Posted by ochell View Post

I've been fighting my 4770k for two years. With a TR Archon double-fan cranked tight to the cpu, and 2 140mm front case fans blowing onto the case, and 2 120mm top case fans blowing onto the RAM, I got good temps on OCCT AVX loads (80c w/o hyperthreaing, 86c w/hyperthreading on) with vcore at 1.33v actual, and similarly high voltages elsewhere.

But I could NOT get it stable even on one core at 45 GHz, even at 1.40v.
I got it stable at 44/44/44/43 GHz at 1.38 vcore, but didn't feel comfortable at that voltage. That was at a cache ratio of 39, and DRAM at 1600.

After setting every single setting mentioned in http://rog.asus.com/254052013/maximus-motherboards/recommended-settings-for-overclocking-maximus-vi-motherboards/ I am at 4.3 GHz 41 cache ratio at 1.31v vcore. I was able to get my DRAM to 2400 11-12-12-29 1T at 1.67v. Four sticks, 32 GB (tried a Ram Cache for Lightroom). This is my first memory OC.

How do you recover from a DRAM-caused boot loop? I ended up switching the Maximus's BIOS to the second BIOS chip. Of course, I then lost all the BIOS settings I had used, because I didn't think to copy BIOS changes to the second chip, nor did I copy them to a USB stick. Then again, maybe flashing the second chip and starting fresh helped me get where I am...?

My DRAM latency is 47 ns. What would I have to do to get it down to 43 ns? I don't want to go higher in voltage, and can't pass Memtest at slimmer timings. What are other people running to get those latencies?

That's an improbably high cache. Does lowring cache multiplier let you lower VID/vcore? If so...do that. Higher cache multiplier isn't even worth .01V on your VID.

My mobo will reset the bios settings to stock on most failed boots. Sometimes this happens after a barely-unstable setting takes a particularly bad (?) crash. But changing DRAM is the easiest way to make it not boot. On some settings you might need to use the CMOS reset pins. You're going to benefit a lot more from spending your time raising core clock by 1x than by overclocking your ram more, though.
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post #18668 of 19536
I agree, try lowering your cache to the stock 35x and RAM to stock while trying to maximize core, then overclock the other two. On my Asus board there's a button near the RAM slots that says MemOK!, press that right after turning on and it should reboot with RAM running at stock, but it will retain your previous settings when you boot into the bios so be sure to change them to something stable (or change voltages or whatever if you think you can stabilize those settings) before saving and exiting.
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post #18669 of 19536
Quote:
Originally Posted by jdorje View Post

That's an improbably high cache. Does lowring cache multiplier let you lower VID/vcore? If so...do that. Higher cache multiplier isn't even worth .01V on your VID.

My mobo will reset the bios settings to stock on most failed boots. Sometimes this happens after a barely-unstable setting takes a particularly bad (?) crash. But changing DRAM is the easiest way to make it not boot. On some settings you might need to use the CMOS reset pins. You're going to benefit a lot more from spending your time raising core clock by 1x than by overclocking your ram more, though.

I didn't see any benefit to lower cache ratios, even 35. My mobo manual doesn't show a BIOS reset switch, although it has a "MemOK" switch that's supposed to retrain the DRAM. I couldn't get that to work.
I tried everything I could get my hands on to up core clock. I really thought running different multiples per-core was the way to go, but only more vcore worked. I'm not comfortable running more than 1.3 for the next 4-5 years. Wish the 4790k's would come down to $100...
post #18670 of 19536
Quote:
Originally Posted by Nick the Slick View Post

I agree, try lowering your cache to the stock 35x and RAM to stock while trying to maximize core, then overclock the other two. On my Asus board there's a button near the RAM slots that says MemOK!, press that right after turning on and it should reboot with RAM running at stock, but it will retain your previous settings when you boot into the bios so be sure to change them to something stable (or change voltages or whatever if you think you can stabilize those settings) before saving and exiting.

After re-reading the mobo manual, you are right. I says to -hold- the MemOK button basically until I get a successful boot. I was only holding it for 5 or so seconds. Thanks for the tip.
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