Uncore Frequency?

RoEy

RoEy

RoEy

Associate
Joined
10 Jan 2008
Posts
1,677
Location
Nottinghamshire
Hi all,

Posted a week back complaining of stuttering in my games and vids.

Well I've overclocked my CPU at 3.4, it's a core i7 920. I've noticed that if I make the Uncore Frequency double the dram and nudge it up one, the system seems to run a lot smoother any my games do to.

Should it just be double ram or can you increase it a bit more as it says in bios the uncore frequency should be 'atleast' double?

Ram is at 1360mhz and uncore is at 2820 (100 over double dram frequency)

Main Spec:

CPU - Core i7 920 - HeatKiller Block
Motherboard - ASUS Rampage 2 Extreme X58
Memory - 6GB Corsair Dominator 1600 MHz (3x2)
GPU - Sapphire 4870 X2 Koolance Block
PSU - Corsair HX1000
Monitor - NEC 24WMGX3
HDD - Seagate Barracuda 7200.12 500GB
HDD - Samsung SpinPoint F1 1TB


Thanks,

RoEy
 
Last edited:
You can have it as more than double the ram frequency. Normally if I have my ram at 1300 or so, I up the uncore to around 3200mhz.
 
Helios1234 said:
You can have it as more than double the ram frequency. Normally if I have my ram at 1300 or so, I up the uncore to around 3200mhz.
Click to expand...

Cheers mate. Do you find you need to up the vtt when doing so and does your system also feeling faster with it increased?

RoEy
 
Last edited:
I have my vtt at 1.34v at the moment and that's very stable for me. I'm not really sure if I notice the speed benefit of a higher uncore but it doesn't hurt to have it higher as long as it's stable. I currently have my ram at 1600mhz so I have to use an uncore of 3200mhz anyways.
 
If increasing the Uncore value works for you keep it that way. Stability is key though as Uncore can make a system fall flat on its face if run too high.
 
Cheers lads.

Ok the following is stable with IBT set to 20 runs on Maximum:

CPU @ 3.4 170 X 20
RAM @ 1360
UNCORE @ 3060 (200 (2 nudges up) over double DRAM)
QPI/DRAM@ 6120 which equates to 3060 also

VCORE @ 1.25 (Load 1.27)
CPU PLL @ 1.812
VTT @ 1.31
VDIMM @ 1.65

Priming now for the last two hours and so far so good and temps are all even 59 59 59 59, 4870x2 at 38 when priming and 31 idle.

Does that uncore sound ok?

I know it's not a massive overclock but I'm new to it and there's hardly any difference in temps seeing at stock and on auto my mb was pumping 1.25 vcore through cpu.

Thanks,

RoEy
 
Looks fine. Are you sure it's not the Speedstep/EIST that's causing the system to stutter?
 
w3bbo said:
Looks fine. Are you sure it's not the Speedstep/EIST that's causing the system to stutter?
Click to expand...

Hi W3bbo,

I've disabled Speedstep but I'm not sure what the EIST is. Is that turbo?

I found out that it was DivX 7 causing the slight stutter in my blurays / mkv's. So I'm now using a much better player called 'The KMPlayer'. Only thig is it turns aero off when playing, not sure if there's a way to disable that.

In CPU Z it says my cpu is at 3.4 permanently regardless of load but in real temp its affecting by load and drops down to 2.8 around idle, which one is telling the truth? I'm guessing CPU Z, hopefully.

Thanks,

RoEy
 
EIST is the same as speedstep, motherboards name them differently. The speed dropping down could be CIE enhanced halt state which varies the clock and voltages depending on whether it's idling or under load.
 
Last edited:
Helios1234 said:
EIST is the same as speedstep, motherboards name them differently. The speed dropping down could be CIE enhanced halt state which varies the clock and voltages depending on whether it idling or under load.
Click to expand...

ahh right. Yeah I've seen CIE, so should I disable it? And if so, will I need to prime again?

Thanks,

RoEy
 
Yeah disable it. You shouldn;t need to prime again though as it regulates CPU speed/voltage dependant on load conditions and as prime dictate 100% load it shouldn't be an issue.
 
w3bbo said:
Yeah disable it. You shouldn;t need to prime again though as it regulates CPU speed/voltage dependant on load conditions and as prime dictate 100% load it shouldn't be an issue.
Click to expand...

Yeah but its putting my vcore up to 1.27 at load even though I've set it at 1.25.

Should it still be ok then once disabled?

Thanks,

RoEy
 
It will be fine. IF you manually set the vCore to 1.25, what you're experiencing is a minor overvolt. This will still happen even with C1E disabled.
 
w3bbo said:
It will be fine. IF you manually set the vCore to 1.25, what you're experiencing is a minor overvolt. This will still happen even with C1E disabled.
Click to expand...

So by disabling it it will make it run at 3.4 permanently then?

I have C0 stepping too.
 
You must log in or register to reply here.
Back
Top Bottom