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Haswell Overclocking Guide [With Statistics] - Page 665

post #6641 of 19540
4770ks those basic settings...
post #6642 of 19540
My final OC so far. Will monitor for a week before posting final verification. smile.gif




x47
VID:1.37
uncore x42 <-Will try upping it later
cache voltage 1.2
Input voltage: 1.95
LLC:8
post #6643 of 19540
I have some stable profiles for my system (all of them are based on the same Vcore):
  1. 4.5ghz, 42x, 2133
  2. 4.6ghz, 42x, 1600
  3. 4.6ghz, 35x, 1866

Which profile would you use for:
  • gaming (BF4)
  • benching (3DMark, Valley)
  • rendering (Premier)
post #6644 of 19540
Why are you using the same vcore for 4.5 and 4.6? Why only have uncore OR ram up at 4.6 (but never both up or down)?
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post #6645 of 19540
Quote:
Originally Posted by Cyro999 View Post

Why are you using the same vcore for 4.5 and 4.6? Why only have uncore OR ram up at 4.6 (but never both up or down)?

the voltage im setting can't handle high ram and the higher core multiplier together, only one or the other. I'm dropping uncore in some situations to manage heat output (higher core multi results in higher temps)
post #6646 of 19540
for BF4. #1. bf4 loves high speed memory.
post #6647 of 19540
Quote:
Originally Posted by fleetfeather View Post

the voltage im setting can't handle high ram and the higher core multiplier together, only one or the other. I'm dropping uncore in some situations to manage heat output (higher core multi results in higher temps)
Quote:
4.6ghz, 42x, 1600
4.6ghz, 35x, 1866

I don't understand this.

Ok - you need to manage heat output. Then you take B instead of A if a few degrees matter to you.

Shouldn't that be 46x, 42x, 1866 vs 46x, 35x, 1866? Why lower RAM speed?


I've never seen any proof or even really suggestion towards raising RAM frequencies requiring a vcore boost - your 4.5 should need significantly less vcore than 4.6
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post #6648 of 19540
Quote:
Originally Posted by Cyro999 View Post


I don't understand this.

Ok - you need to manage heat output. Then you take B instead of A if a few degrees matter to you.

Shouldn't that be 46x, 42x, 1866 vs 46x, 35x, 1866? Why lower RAM speed?


I've never seen any proof or even really suggestion towards raising RAM frequencies requiring a vcore boost - your 4.5 should need significantly less vcore than 4.6

You're right in that the temp difference is only a few degrees. I've seen both RAM freq and Uncore multi affect heat output. Upping RAM freq increases temps presumably due to the extra gflops and workrate done by the CPU (I'm not 100% sure why it happens, but I'm fairly confident that I've witnessed it). As you know, uncore affects temps simply due to the higher Vring voltage.

RAM frequency definitely requires a Vcore bump (at least if you have a C0 chip, as Darkwizzie suggests in the OP). This was demonstrated with both of my C0 4770k's. The best way to validate this is with OCCT Large thumb.gif
post #6649 of 19540
Quote:
RAM frequency definitely requires a Vcore bump

100mhz for me @4.5 level costs 0.05v - it's that much of a bump?

There's more steppings than just c0? Not heard of this somehow

RAM speeds affecting CPU would be extremely marginal, if measurable, less than that of just turning cpu frequency down by a few % on the same voltage. How can you measure like a 1-2c change? I see over a 10c variance in my OC just because of room/case temperatures
Edited by Cyro999 - 12/9/13 at 12:10am
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post #6650 of 19540
Quote:
Originally Posted by Cyro999 View Post

100mhz for me @4.5 level costs 0.05v - it's that much of a bump?

There's more steppings than just c0? Not heard of this somehow

RAM speeds affecting CPU would be extremely marginal, if measurable, less than that of just turning cpu frequency down by a few % on the same voltage. How can you measure like a 1-2c change? I see over a 10c variance in my OC just because of room/case temperatures

mmm I guess not in your case, although every chip is different.

Oh, i thought there was D0 as well, but I may have my facts crossed. Sorry.

I actually see a change of 4-5C over 4 hours, even when the ambient is the same in both conditions (within margin of error). 5C is a big issue if you're sitting at 80C under load and plan to be playing CPU-bound games for hours at a time tongue.gif
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