i7 920 D0 - Can't get past 3.9Ghz :(

snedie

snedie

snedie

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Seem to hit a brick wall with my 920 D0 at 3.9Ghz. Tried upping Vcore to 1.3875v along with QPI of 1.3v. I've made sure that the RAM speeds are as close to stock as possible (4Ghz would run the ram at 1603Mhz, the specified frequency of XMS3).

Also tried enabling VDROOP and most of the other normal OCing stuff like no turbo boost etc. Any ideas? Can snap pics of the BIOS if it helps, unless someone knows of an app to get info from an Asus P6T-SE BIOS from inside of Windows.

Temps & Info:
I739Ghz.png


Also just to note it runs at 3.8Ghz at just 1.288vcore, then past that I need to jump right to 1.368vcore just to get 3.9Ghz.
 
Try upping the qpi voltage a tad more, 12gb of ram places a bit more strain on the cpu's integrated memory controller. For reference, im running 12gb of kingston hx in a p6t deluxe v2, qpi at 1.33125.
 
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Will do thanks :)

How high can I take the QPI? Would a low QPI voltage explain half my RAM not showing up when I was trying for 4.2Ghz?
 
you should enable turbo boost imo,run 21x191 and 8x mem multi

12gb will limit your oc imo,you might need around 1.45v qpi for 4ghz and 1600mhz ram with 12gb
 
Max reccomended for qpi is 1.3500 iirc. As for missing memory, i couldnt honestly say if low qpi would cause this. One issue im aware of concerning missing memory is an overtightened heatsink base. UCLK frequency should be 2x your ram speed +1, qpi link data rate, keep this below 8000 mts.
 
setter said:
Max reccomended for qpi is 1.3500 iirc. As for missing memory, i couldnt honestly say if low qpi would cause this. One issue im aware of concerning missing memory is an overtightened heatsink base. UCLK frequency should be 2x your ram speed +1, qpi link data rate, keep this below 8000 mts.
Click to expand...

you can go above 1.35v qpi,ive known folks use 1.45v+ for years wihout issue,missing memory can be down to not enough qpi/vtt voltage also

http://forums.tweaktown.com/gigabyt...-sb-overclocking-guides-1155-1156-1366-a.html

"QPI/VTT voltage – This is the uncore voltage. Remember that the primary uncore devices are the L3 cache and the memory controller. This is also the primary adjustment required to increase bclock frequency. Again, for Bloomfield I personally wouldn’t hesitate to run mine up to about 1.45V on air 24/7. For Gulftown I don’t like to go over 1.4V for daily use."

http://www.techreaction.net/2010/09/07/3-step-overclocking-guide-bloomfield-and-gulftown/3/

qpi/vtt is all down to your cpu's imc and how much ram and speed your rams running at
 
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Thanks for that wazza, been so long since i oc'd mine, way back then 1.35 was the figure being touted. 21x multi ive found is a lot easier to use on the asus p6 series, i needed a hefty vcore and qpi increase when dropping to 20x, even with only 6gb of ram i had at the time. Below are my current settings, (though ignore 21x, same voltages etc in use now but 20x multi, 12gb). My old 6gb reaper kit at 7-7-7-24 needed those settings, they luckily worked fine with my 12gb of kingston at 9-9-9-27.

IMG_1973.jpg

IMG_1974.jpg
 
those look fine to me,i always used 21x200 for 4.2ghz with 1.26v cpu and 1.32v qpi/vtt that was with 6gb of ram and that was a decent chip i had

but dont be scared to use more qpi/vtt,normally you wont need 1.4v and above but with 12gb id expect around that much

some cpu's prefer odd multis and vice versa so youd need to test which is more stable

ohh and work out your uncore freq its 2x mem multi or 2x +1 +2
so 10x mem multi can be 20x/21x/22x uncore freq and so on,whatevers most stable
 
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Thanks a lot guys, will give the higher QPI a try. Will go for 1.35 and 1.4 see what happens.

Out of curiosity, I have this i7 on a custom water loop with a 240mm rad, those temps okay? Was expecting them to be lower but I built the loop about four months ago and only just got around to trying decent over clocks.
 
80c with odd spikes to 83-85c is ok imo,try to keep below 80c though,you might be able to lower cpu voltage with a bit more qpi/vtt as it might have been that that it was failing on

bsod error codes for x58 are a series of 0's followed by

101 error means not enough cpu voltage
124 error means not enough qpi/vtt voltage

@snedie just noticed your running 950 cpu so you would need to disable intel turbo boost with 21x191,or try another combination 23x175 and 8x=1400mhz ram,disable intel turbo boost or else it might use 24x cpu multi
 
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wazza300 said:
80c with odd spikes to 83-85c is ok imo,try to keep below 80c though,you might be able to lower cpu voltage with a bit more qpi/vtt as it might have been that that it was failing on

bsod error codes for x58 are a series of 0's followed by

101 error means not enough cpu voltage
124 error means not enough qpi/vtt voltage
Click to expand...

Booted straight to windows and did 5 passes in Linx with no errors but temps where hovering around 80 with core 1 hitting 87 at times:

4Ghz.png


I'm wondering if my TIM application was okay, I didn't have any ISO Alcohol to hand and used nail varnish remover :D
 
Temps arent too bad, though if you could possibly get your vcore a little lower it might help lower them a touch. I now hit 80c on my highest core under LinX load, air cooled with an Alpenfohn k2. But this is solely down to a case with very poor airflow, (bitfenix shinobi xl). The cpu ran 7c lower in my previous lian li a70f due to it's much better airflow.
 
mine used to hit 80c max,see if you can get voltages any lower,those temps are ok if thats as high as they got with linx test but its always good if you can improve

if your using gigabyte board try clocking through dvid,or on asus try with cpu voltage offset

this way allows cpu to downclock in speed/voltages at idle and full speed/volts at load
 
4GhzLowerVCORE.png


Dropped by quite a bit, temps down 3c max and still hovering around the 78c mark across all for. Core 1 seems to get the hottest, hovering around 80c most of the time.

I have the RAM set at 1500Mhz, the next jump without adjusting BCLK is 1900Mhz, anyone reckon that is possible with 12GB? I do have the DIMM's cooled with a 120mm fan on pointing at them if it makes a difference.
 
I don't think you would manage 1900mhz,1600mhz is usually the max with 12gb esp overclocked,you can try but qpi/vtt voltage needed simply might not be worth it,1500mhz is plenty fast enough
 
Temps seem a little high for custom water, what kit? I've just hashed together some parts for a quick sale to client with a 920 @ 4Ghz 1.36v and 12Gb RAM in an Antec solo (small and insulated case) + TRUE and 2x 140mm Noctua Fans, 4 1Tb hdds in RAID 10 in hotswap bays and 240Gb Vertex 2E, no front intake. All that and i'm getting 78C tops in LINX, ambient is about 26C
 
The CPU was lapped by the guy I bought it from, I wonder if that's the cause or if I just hashed the TIM application. I did remove the restriction plate from the EK Supreme block, will that make a huge difference?
 
I run a very similar setup 930 d0, 12gb XMS3 on a P6x58D-e. It's air cooled and max out at 65 -71c depending room temps.

cpu : 1.33125
ppl : 1.8
qpi : 1.23125
ioh : 1.1
ioh pcie : 1.5
ich : 1.1
ich pcie : 1.5
ram : 1.65

cpuz20120625223306.jpg


coretemp1.jpg


finishedlinx06.jpg
 
Sh4rkie said:
I run a very similar setup 930 d0, 12gb XMS3 on a P6x58D-e. It's air cooled and max out at 65 -71c depending room temps.

cpu : 1.33125
ppl : 1.8
qpi : 1.23125
ioh : 1.1
ioh pcie : 1.5
ich : 1.1
ich pcie : 1.5
ram : 1.65
Click to expand...

Will give these numbers a try thanks mate :)
 
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