• We’re currently investigating an issue related to the forum theme and styling that is impacting page layout and visual formatting. The problem has been identified, and we are actively working on a resolution. There is no impact to user data or functionality, this is strictly a front-end display issue. We’ll post an update once the fix has been deployed. Thanks for your patience while we get this sorted.

Haswell overclocking discussion.

Page 4 - Seeking answers? Join the AnandTech community: where nearly half-a-million members share solutions and discuss the latest tech.
At those temps, a small A/C unit for your computer room might be considered a vital component of your PC cooling system.
 
This is my overclock. I originally had a 4770k that wouldn't go above 4.2Ghz and wasn't stable stock on Prime 95 with different sticks of RAM, memtest, everything. I RMA'd it and got one that now won't go above 4.5Ghz, but is completely stable, which I am OK with, though I really dislike odd numbers and wish it would hit 4.6Ghz at temperatures I could handle.

KasyWkL.png
 
Chip looks good, delidding is an option for gaining some additional Hz! Your frequency to voltage looks good so there is probably a bit more left in the tank 🙂
 
I have been working to lower my Vcore. I got it down to 1.21 from 1.26 .. Better temps and it is stable. I am liking this. 4.4ghz with uncore 40x, for adaptive voltage.. I set my additional turbo cache volt to 1.21v .. running stable!
 
allenk09 said:
... now won't go above 4.5Ghz, but is completely stable, which I am OK with, though I really dislike odd numbers and wish it would hit 4.6Ghz ....
Click to expand...

Both 4500 and 4600 are divisible by 2 without producing a remainder. Both 4.5 and 4.6 fail to be divisible by 2. Thus either both or neither are technically "odd" numbers in the mathematical sense. I suspect if you asked most people they would say 4500 (4.5) is a more round number than 4600 (4.6). I understand the sentiment that you want more speed, I have always wanted more from my SB-E, it has never gone above 4.4Ghz reliably at a voltage I am willing to push through it.
 
Ok, here's what I did to my 4670k (not all at once, but this is what it is now)

- cpu ratio is 44
- uncore is 3.8Ghz
- vcore is 1.275
- turned XMP on (9 9 9 24 1600Mhz)
- turned turbo off

That runs 94°C at the hottest while running Prime95 for at least 10 minutes. Tried cranking the ratio up to 45, but that crashed a few seconds into Prime95.

Either I have a terrible piece of silicon, or Prime95 is amazingly taxing (probably a bit of both).

Any recommendations on what I could change with it? My board is a Z87X-D3H and cooler is a H100i with 2 SP120 performance (in quiet mode on Corsair Link) fans (well, not mine, this is a friends PC I'm tuning)?
 
If you want to go any higher in prime95 you'll have to delid first.

The two main BBCodes I've noticed, are 124 and 101, maybe they'll help someone out.

124 - More core voltage
101 - More uncore (ring bus) voltage


Also some memory codes 🙂D)


Currently at 4.6GHz core 1.155v, 4.5GHz Uncore 1.140v, 2400MHz 13-13-13-37 1T on the ram with 1.7v (lulz). Using the Intel optimized Linpack, actually finding Crysis 3 to be a better overall test than anything else, it will pick up on core, ram, and uncore it's amazing... lol
 
Last edited:
BrightCandle said:
Both 4500 and 4600 are divisible by 2 without producing a remainder. Both 4.5 and 4.6 fail to be divisible by 2. Thus either both or neither are technically "odd" numbers in the mathematical sense. I suspect if you asked most people they would say 4500 (4.5) is a more round number than 4600 (4.6). I understand the sentiment that you want more speed, I have always wanted more from my SB-E, it has never gone above 4.4Ghz reliably at a voltage I am willing to push through it.
Click to expand...

Odd mod 100? 🙂
 
If you want to go any higher in prime95 you'll have to delid first.

The two main BBCodes I've noticed, are 124 and 101, maybe they'll help someone out.

124 - More core voltage
101 - More uncore (ring bus) voltage


Also some memory codes ()


Currently at 4.6GHz core 1.155v, 4.5GHz Uncore 1.140v, 2400MHz 13-13-13-37 1T on the ram with 1.7v (lulz). Using the Intel optimized Linpack, actually finding Crysis 3 to be a better overall test than anything else, it will pick up on core, ram, and uncore it's amazing... lol
Click to expand...
I don't know how to do those codes 🙁
1.155v for 4.6Ghz seems soooooo low. I think that overclock would crumble in Prime95 😛 Or you have some silicon crafted by the gods.

Which "turbo" setting is that?
Click to expand...
Intel Turbo Boost.

I changed my overclock, because 94°C was just too hot. It's 4.2Ghz on 1.225v now, peeking at 81°C on Prime95. That's a 200Mhz trade off for 0.05v less and 13°C cooler, I'm happy with that.
 
I've bought an i7 4770k and put it on a GA-Z87X-UD4H with 8GB Crucial Ballistix DDR3-1600. I'm running the CPU at 4.7GHz on a Vcore of Normal + 0.222v, RAM at 1600MHz. I tried tweaking some other Voltages, and speeding up the uncore, but gave it up.

Heatsink is my long-suffering NH-D14 with two NF-A15's. Testing environment is a basement where the ambient runs around 20c.

Observations:


The heatsink puts out mild warmth, not real heat. I could heat the room with the efflux from my i7 860 at a mere 4GHz. That implies that the IHS is a thermos bottle for this Haswell.

Early on in LinX, before it crashed, the 1st core was at 85c with a Vcore of normal+0.20v. At the same place in LinX with a Vcore of normal+0.22v, the 1st core is 90c. So it is clearly past the inflection point: an increase of 0.02v causes a 5c rise in core temp.

The chip is stable for 20 reps of LinX at N+0.22v, unstable on the 4th rep of LinX at N+0.20v. So I set it to N+0.222v just to be on the safe side. I am waiting to hear from Gigabyte tech support as to whether Normal + X is automatically Adaptive Voltage.

GFlops seems to depend on Voltage. With fixed Voltage of around 1.27-1.28 Volts, GFlops was high 68GFlops to low 69. On N+0.222v it's 69.6+ GFlops.

AIDA64 runs much cooler than LinX on this setup.
 
Last edited:
ehume said:
GFlops seems to depend on Voltage. With fixed Voltage of around 1.27-1.28 Volts, GFlops was high 68GFlops to low 69. On N+0.222v it's 69.6+ GFlops.
Click to expand...


The bad news is that your Linx is outdated. GFLOPS with AVX enabled Linx (google for it) should be ~130GFlops @ your clock. But be warned that wattage output is ridiculous at that rate.
 
JoeRambo said:
The bad news is that your Linx is outdated. GFLOPS with AVX enabled Linx (google for it) should be ~130GFlops @ your clock. But be warned that wattage output is ridiculous at that rate.
Click to expand...

You are so right. I tried one and it crashed my system. Since I couldn't find a DL I trusted, I've put the LinX project on the back burner.

I did manage to boot in 5.0GHz. Once:

2845128.png
 
Just picked up a haswell chip 4770k and the asrock z87 extreme6. Currently running 4.2/4.2 with 1.17 voltage on both. Stable.

I have a pretty good chip but this evo 212+ isn't keeping it cool enough. With only 1.17 volts I am at 85-87c with AVX linx. I might reseat / reapply thermal paste.

I am realllllly thinking about going with a nzxt kraken x60 and rocking 4.5ghz
 
Last edited:
I'm having great success with a thermalright macho rev.a. Running a 4670k at 4.7 at 1.21v at 78c. You running a 4670k or 4770k?
 
4770k forgot to mention that. I noticed the difference from non AVX linx to AVX is a huge jump in temps, at the same voltage level.

Running 43/43 at 1.65 on both in linx avx currently, temps of 83 max. So far so good. I really wanna go watercooling for this chip. I am 100% confident I could get 4.6 stable, probably even closer to 5ghz with enough cooling.
 
Last edited:
You must log in or register to reply here.

TRENDING THREADS

Back
Top