(Haswell) Understanding Voltage

Swizz · 2 Jul 2013 at 10:45

Basically as the title states I have been slowly cranking the Volts up slowly but surely, but I think I am coming to the peak. I don't want to push it to hard. I was able to home a 4.3 at 1.261V. No problemo. Now we are reaching for 4.4. Well that's becoming more of a challenge. At the moment I am running OCCT Linpack, as it goes through the motions etc, searching out that sweet spot, as it Blue-screening along the way. When should I stop feeding this hungry monster that goes by the name of, Haswell? And why has it jumped so largely from 1.261V "4.3" to currently 1.325. Mission to control, in search of 4.4Ghz

Thanks guys

Swizz · 2 Jul 2013 at 10:50

I just wanted to add that Temps through the reading of, RealTemp are 75. 77. 74. 68c when stressed

seanr28 · 2 Jul 2013 at 11:15

your temps are fine for the minute, min goes into late 80s during stress test, under normal conditions it should be nowhere near this high.

What cooler are you running?

Swizz · 2 Jul 2013 at 11:22

seanr28 said:
your temps are fine for the minute, min goes into late 80s during stress test, under normal conditions it should be nowhere near this high.

What cooler are you running?

I have all fans running in my FT02 case and also a Noctua NH-D14

spankingtexan · 2 Jul 2013 at 16:56

Swizz said:
Basically as the title states I have been slowly cranking the Volts up slowly but surely, but I think I am coming to the peak. I don't want to push it to hard. I was able to home a 4.3 at 1.261V. No problemo. Now we are reaching for 4.4. Well that's becoming more of a challenge. At the moment I am running OCCT Linpack, as it goes through the motions etc, searching out that sweet spot, as it Blue-screening along the way. When should I stop feeding this hungry monster that goes by the name of, Haswell? And why has it jumped so largely from 1.261V "4.3" to currently 1.325. Mission to control, in search of 4.4Ghz

Thanks guys

Can't you get those clocks at lower volts? 1.261V is rather high for 4.3, thought you could achieve 4.3GHz @ 1.1??V. Your temps are good though, especially with that 1.325 but I think you are near the limit where vcore is concerned @ 1.325V, but I'm no expert, come in here you ocuk wizards

james_2k · 2 Jul 2013 at 16:59

I'm running 1.36

spankingtexan · 2 Jul 2013 at 17:07

Just saw this..

http://www.overclock.net/t/1397433/...rofile-power-limit-safe-voltage-vs-ivy-bridge

Says 2V vcore.
Is this correct? or am I misreading something here?

wazza300 · 2 Jul 2013 at 17:28

vcore - cpu speed
vring - uncore
system agent - memory controller
vrin can help reduce vcore and stablize high overclocks. vcore should be no closer then 0.400 from vrin. so if using 1.8v vrin vcore should not be higher then 1.4v

spankingtexan · 2 Jul 2013 at 17:41

wazza300 said:
vcore - cpu speed
vring - uncore
system agent - memory controller
vrin can help reduce vcore and stablize high overclocks. vcore should be no closer then 0.400 from vrin. so if using 1.8v vrin vcore should not be higher then 1.4v

So!, now I know how inexperienced I really am

. where's that Atari 65XE

Swizz · 3 Jul 2013 at 15:18

A little stumped here guys..With testing a variety of stress programs I was getting mixed results. Some were passing, some were not. Let me cut it down a little, late last evening I raised the Chipset Voltage - PCH Core 1.090 to 1.095 & PCH IO 1.500 to 1.530. Struggling to get 4.4Ghz I wasn't able to get it past 1.310V with-out blue-screening. That being said when I raised the Chipset Volts to the above I was able to get in-to Windows on 4.5Ghz at 1.75V. I stressed it with OCCT Linpack, then received another BS 40 minutes in. I turned the PC on this morning to have another bash, and seen a BS just after the welcome screen. Now 4.5Ghz Won't even log in-to Windows at 1.35v

Any more advise would be great..

Thanks.

james_2k · 3 Jul 2013 at 15:21

what cache volts? and speed?

Swizz · 3 Jul 2013 at 15:25

This is my first OC attempt so excuse my ignorance. Would I find the Cache Volts in the Bios?

james_2k · 3 Jul 2013 at 15:35

yes, will be called cache voltage, or v ring something like that. on my asus its cache voltage. also find out the min and max multiplier for the cache, it can greatly affect stability. also in the bios.

Swizz · 3 Jul 2013 at 15:38

The Cache volts that you mentioned, I have CPU-Z, open now. I see a "Caches" Tab..Where you referring to that?

Swizz · 3 Jul 2013 at 15:39

Alrighty..I'll have a look now

Swizz · 3 Jul 2013 at 16:03

Okay..i'm looking at the following...

CPU VRIN EXTERNAL OVERRIDE
CPU RING VOLTAGE
CPU RING VOLTAGE OFFSET

Am, I looking at the right page?

Swizz · 3 Jul 2013 at 16:22

Where it states CPU VRIN, Under the CPU Status Tab...It's reading CPU VRIN 1.776V. if that means anything to you dude

james_2k · 3 Jul 2013 at 16:24

its vring you want. not vrin. you could try setting vrin to 1.8 though.

just dont set vring to 1.8.

Swizz · 3 Jul 2013 at 16:35

Okay mate, back in CPU Core Voltage Control, now...CPU Ring Voltage..Is that the one?

james_2k · 3 Jul 2013 at 16:57

yes. first you want to check what the cache multiplier is though, it shouldnt need more volts at 39. if its higher then you could try a small bump in volts to see if it stabilises.