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Haswell Overclocking Guide [With Statistics] - Page 271

post #2701 of 19571
So,lol
I will test this settings now 8h prime 95 blend :
Core: 46x @ 1,25v
Uncore: 44x @ 1,2v

At an ambient temp of 15°C biggrin.gifbiggrin.gif ( abit cold in my room xD)
post #2702 of 19571
Is the lowest FFT in prime blend test ,8k?
Edited by Menphisto - 9/16/13 at 12:49pm
post #2703 of 19571
Yes, 8k is the smallest, and it's the highest temperature you will see.

Here's what blend did with Prime95 v27.9 (I don't know if it's different with the newer version):

448K, 8K, 512K, 12K, 576K, 18K, 672K, 21K, 768K, 25K, 864K, 32K, 960K, 36K, 1120K, 48K, 1200K, 60K, 1344K, 72K, 1536K, 84K, 1728K, 100K, 1920K, 120K, 2240K, 140K, 2400K, 160K, 2688K, 192K, 2880K, 224K, 3200K, 256K, 3456K, 288K, 3840K, 336K, 400K, 480K, 10K, 560K, 16K, 640K, 20K, 720K, 24K, 800K, 28K, 896K, 35K, 1024K, 40K, 1152K, 50K, 1280K, 64K, 1440K, 80K, 1600K, 96K, 1792K, 112K, 2048K, 128K, 2304K, 144K, 2560K, 168K, 2800K, 200K, 3072K, 240K, 3360K, 280K, 3584K, 320K, 4000K, 384K, 4096K

It's 82 different FFT sizes. It will start again from the first one after it's finished with those. If it works for 15 minutes on each test, it will be done after about 21 hours. If you put it on 5 minutes, it will be done after about 7 hours.
post #2704 of 19571
Thanks, very much! biggrin.gif
post #2705 of 19571
Quote:
Originally Posted by deepor View Post

If you don't touch the settings, i5 has higher gflops than i7 in that test. HyperThreading and 8 threads on i7 loses against the 4 threads on i5.

This used to be the case for previous gen cpus, with an i7 disable HT & the gigaflops increase like the i5s.
But the 4770k was a bit different when I first tested, I was running IBT at 147Gflops with HT on & tried disabling HT to see 150+, but when I disabled HT, gflops dropped to 144 at the same settings just disabling HT.
Quote:
Originally Posted by Darkwizzie View Post

Holy crap guys, look!
http://www.youtube.com/watch?v=QQdgubDirTU

Read their description:

We setup a beast test bench consisting of dual GTX Titans and an i7 hex core processor and fully loaded it with Prime 95 in small FFT mode and furmark with ALL the options running at 2560x1440 resolution. Linus shows you how many Watts you would really need when looking for a power supply. 

Seems an overlay got lost in the interwebs. Here are the results!
750W HCG = 682 Watts
850W HCG = 685 Watts
850W HCP = 645 Watts
900W HCG = 684 Watts

Quick specs for our bench:
- Samsung 840 PRO SSD
- Dual GTX Titans in SLI
- 3.2GHz i7-3930K
- 32GB RAM
- ASUS ROG Rampage IV Extreme

They're saying dual Titans in worst case scenario only pulled 684 watts. WHAT.

That is Linus though, he doesn't push things very hard.
Get the voltage & clocks up & the power draw goes up too, I pull more juice than any of those sli numbers with a 4770k at 4.5Ghz & a single gpu all water cooled.
With the voltage hacks for 780s & Titans quite a few people are discovering 1000W PSUs aren't enough to max the clocks in sli.
    
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post #2706 of 19571
Quote:
when gpu dropped to the mid 70% say on Oman was never below cpu use

I doubt you had >70% average across all threads on an 8350, but if your GPU's were not maxed you probably had one thread holding you back, were you watching them individually?

Crysis 3 is held back by CPU especially with powerful GPU setups or low settings, but it utilizes many threads back so you might not see it much on an 8350, or it might not be general trend (especially with "only" 7870's and max settings +aa) i7 > 8350 > i5 in that game

I didn't say battlefield and crysis didn't use many threads, just that they are CPU bound at times and it's especially noticable if you're shooting for 120fps on a few turned down settings rather than 40fps minimums with 4xmsaa
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post #2707 of 19571
On Prime 95 12k FFT ,the board or the CPU give some noise sometimes....is this normal?
post #2708 of 19571
Thread Starter 
Quote:
Originally Posted by Menphisto View Post

Finally i pushed my i5 to 4,6 GHz(prime95 5hr 8k max temp 88C undelid on air biggrin.gif) ,but i have some questions:
1. Is it normal that when i set 1.25v vcore in the BIOS it is higher when i am in Windows (1.27v max.)
2. Is it safe to run it 24/7 in fixed voltage (and uncore 1.25v also but my BIOS Mark this voltage red redface.gif)
3. 4,4 GHz uncore good for 4,6 GHz core?

1 Yes

2 Yes

3 Doesn't matter

 

Quote:
Originally Posted by TANN3R View Post

Hey guys, I've been reading through this guide and it's got some really good info. When I went to adjust things in my Maximus VI BIOS i was not able to adjust settings by entering a value, I could only press plus or minus to cycle through everything. What i ended up doing was just setting my clock speed to 4.2 and letting my Mobo decide on the voltage. Is that okay?

I'm also having trouble finding the uncore and thing like that in my bios.

Uncore, ring bus, cache ratio? Prolly Cache ratio is what it's called in on your mobo.

As long as you don't get a bonkers vcore you're fine. Instability would be possible but won't damage CPU in any way.

 

Quote:
Originally Posted by wy2sl0 View Post

I think I am doing something wrong? I don't know what though.

Just installed an H100i. On LinX AVX2 my H100i temp doesn't go above 31.5* C, however my core temp is at 85*.

I had the same issues on my Mugen 3 as well before. The heatsink wasn't really THAT hot, but the core temp was ridiculously high. Yes I am delidded BTW.

That's the way it is due to horrible heat dissipation due to horrible glue used for TIM. That's why some delid.

 

Quote:
Originally Posted by Clockwerk View Post

I'm sure this has been asked a thousand times, anybody know a definitive max safe VCCIN? I have seen everywhere from 1.9 to 2.8 when I searched Google. Currently at 2.2, but am having some issues getting stable at 4.8ghz and think I might need more VCCIN since I have gone up .07 vcore from 4.7ghz.

2.2 I heard one report of CPU death.

Personally see no need to go above 2. No evidence I've received so far suggests it helps stability unless you're doing extreme overclocks.

 

Quote:
Originally Posted by Ghost12 View Post


Rendering movies is heavy. I had to reduce the clocks I had been gaming at all summer a couple of weeks ago on my Amd rig to render some bf3 play in Vegas.

If you can't pass rendering moving, stockfish chess, BF3, then you're not just not synthetic stable, you're not even nonsynthetic stable. :C

 

Quote:
Originally Posted by Menphisto View Post

On Prime 95 12k FFT ,the board or the CPU give some noise sometimes....is this normal?

What? The CPU is making a noise?

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Undelwalt (2017)
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Celapaleis (2013)
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CPUMotherboardGraphicsRAM
7600k @ 5.197/1.392 1.392v z170 Asus Hero EVGA 1080ti SC Black (2100/6250) x2 8gb GSkill Trident Z 3600 @ 3804 15-15-15-32-2T 
Hard DriveHard DriveHard DriveCooling
Samsung 950 Pro 512gb (Undelwalt) WD Red 2tb (Pack Yak II) Seagate Expansion Drive 5tb (Phoenix Down II) 3x560mm HardwareLabs Nemesis GTX 
CoolingCoolingCoolingCooling
XPSC Raystorm Pro Watercool Heatkiller 1080ti Full Cover Waterblock EK XTOP Revo Dual D5 (Serial, PWM, v4) EK ZMT (1/2 - 3/4 ID OD) 
CoolingCoolingCoolingCooling
14xEK ACF (Compression Fittings) EK x4 250 (v2) Distilled Water + PT Nuke (Copper Sulphate) 24x140mm Silent Wings 3 
OSMonitorKeyboardPower
Windows 10 Pro 64bit Catleap 27 Inch 2560x1440 IPS 60hz Display Coolermaster Storm Trigger (Brown Switches) EVGA P2 1000w 
CaseMouseMouse PadAudio
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post #2709 of 19571
Quote:
Originally Posted by Menphisto View Post

On Prime 95 12k FFT ,the board or the CPU give some noise sometimes....is this normal?

I can hear my CPU and/or motherboard making various buzzing noises depending on the load. I think P95 makes it buzz pretty constantly, kinda like a transformer. My nehalem setup did this also.
post #2710 of 19571
Quote:
Originally Posted by Darkwizzie View Post

1 Yes
2 Yes
3 Doesn't matter

Uncore, ring bus, cache ratio? Prolly Cache ratio is what it's called in on your mobo.
As long as you don't get a bonkers vcore you're fine. Instability would be possible but won't damage CPU in any way.

That's the way it is due to horrible heat dissipation due to horrible glue used for TIM. That's why some delid.

2.2 I heard one report of CPU death.
Personally see no need to go above 2. No evidence I've received so far suggests it helps stability unless you're doing extreme overclocks.

If you can't pass rendering moving, stockfish chess, BF3, then you're not just not synthetic stable, you're not even nonsynthetic stable. :C

What? The CPU is making a noise?

I did not say it was not stable, I reduced clocks due to the ambient temp.
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