Core i7/X58 Overclocking Thread

[Splave]

great $105 Ram kit
http://www.newegg.com/Product/Produc...82E16820227384
1.7vdimm 1.45 vqpi/vtt

[Chicken Patty]

^^ that is a great deal

Nice overclock too!

[The-Fox]

That is a nice set of ram there Bobbylite.
My OCZ Platinum 1333Mhz would scale up nicely all the way up to 800Mhz @ 7-7-7-18 1T.
they go up about 900 Mhz @ 8-8-8-18 1T but unfortunately they will no scale up with speed with increased DRAM voltage
I gave them up to 2.1v and they did not seemed to respond, thats a real bummer as I kind of thought they have a great potential.

Bobbylite, do you mind see if your OCZ platinum increase with voltage, as that would be great

[Classic Satch]

4GHz is going to be a lot hotter, and I mean A LOT.

That's no joke. Air coolers simply aren't adequate for these chips once you breach the 4.0Ghz threshold. Decent H20 is the only way to go with these suckers. Or phase.....

[Splave]

That is a nice set of ram there Bobbylite.
My OCZ Platinum 1333Mhz would scale up nicely all the way up to 800Mhz @ 7-7-7-18 1T.
they go up about 900 Mhz @ 8-8-8-18 1T but unfortunately they will no scale up with speed with increased DRAM voltage
I gave them up to 2.1v and they did not seemed to respond, thats a real bummer as I kind of thought they have a great potential.

Bobbylite, do you mind see if your OCZ platinum increase with voltage, as that would be great

Was going to try up to 1.8vdimm will report back

[The-Fox]

Thanks, that is jolly good

BTW, you will probably find out that going above 1.76v~ Vdim will require some high QPI/VTT voltage.
I didn't get any POST with vDimm at about 1.76v when my QPi voltage was at about 1.5V
I suggest you try 1.6v for the QPI/vtt in case you don't get a POST, if it works for you without the additional QPI voltage than thats even better.

[SteveRo]

That's no joke. Air coolers simply aren't adequate for these chips once you breach the 4.0Ghz threshold. Decent H20 is the only way to go with these suckers. Or phase.....

You can get 4ghz (HT on) with a good air cooler - but anything over that (with the exception of a few exceptional CPUs) overwhelms the ability of practically anything on air.
(Exception - put the machine outside in winter!).
I plan to put my 965 under water this coming week.

[Chicken Patty]

hey stevero, almost identical scores on that super pi run lol

[Utnorris]

So I have few questions that I seem not to be able to find answeres too:

1 - How do you determine VID?

2 - I have the EVGA board and I7 920. The first day with defaults (except for Raid turned on and Intel PWR saving turned off) and with stock cooling, the board automatically put my vcore at 1.25v. After installing my water cooling and not changing anything in the BIOS, the board put the vcore at 1.16v. Any ideas on that? Same BIOS by the way, literally, the only thing changed was the cooling.

3 - I have Corsair TR3X6G1333C9, 3x 2Gb 1333 Ram. If I set my Bus Speed to 170 do I set my divider at 2:6 or 2:8? On EVGA's forums Jacob states that the uncore frequency has to be exactly twice the memory multiplier. If I put it at 2:6, then the uncor freq would need to be 12, which is not an option. If I put it at 16, then they do not match. I am just trying to figure this part out as there is a lot more to do than there was with 775 chips. And I am just using 170 as an example.

Thanks

[Chicken Patty]

So I have few questions that I seem not to be able to find answeres too:

1 - How do you determine VID?

2 - I have the EVGA board and I7 920. The first day with defaults (except for Raid turned on and Intel PWR saving turned off) and with stock cooling, the board automatically put my vcore at 1.25v. After installing my water cooling and not changing anything in the BIOS, the board put the vcore at 1.16v. Any ideas on that? Same BIOS by the way, literally, the only thing changed was the cooling.

3 - I have Corsair TR3X6G1333C9, 3x 2Gb 1333 Ram. If I set my Bus Speed to 170 do I set my divider at 2:6 or 2:8? On EVGA's forums Jacob states that the uncore frequency has to be exactly twice the memory multiplier. If I put it at 2:6, then the uncor freq would need to be 12, which is not an option. If I put it at 16, then they do not match. I am just trying to figure this part out as there is a lot more to do than there was with 775 chips. And I am just using 170 as an example.

Thanks

VID is shown on some earlier versions of Real temp, maybe core temp might show it, but im not sure how to tell. my EVGA board did that too!, THe voltages are always changing, however, you sure you might have not turned vdroop control on/off?

Anyhow, im not fully understanding this ratios of the QPI/uncore, and all that, check out this link and see if it helps, im reading it here and there trying to understand these ratios, its def. a bit complicated

http://www.xtremesystems.org/forums/...&postcount=876

[Utnorris]

Thanks. Vdroop is off, meaning there is no Vdroop. I will take a look at that thread. It's just so damn confusing.

[Chicken Patty]

Thanks. Vdroop is off, meaning there is no Vdroop. I will take a look at that thread. It's just so damn confusing.

i feel you bro, my setup now, whatever I set the voltage to in the BIOS is about .5 less than what it is in windows.

So now I have it set to 1.3625v I think and in windows I am running @ 1.423v

Check it out:

[Utnorris]

Do you mind PM'ing me your BIOS settings, I cannot get anything to really run other than dummy OC. Any time I set up an overclock, my board start beeping upon restart and I have to shut it down and restart it. The settings are still there, but it doesn't make any sense to boot to windows if the board went berserk with the settings. It's a shame that dummy OC doesn't go higher than 3.3Ghz. I wouldn't have such a headache. Oh well, I guess I have to re-learn how to overclock.

[msgclb]

So I have few questions that I seem not to be able to find answeres too:

1 - How do you determine VID?
2 - ...
3 - ...

Thanks

I'm only going to address question 1. I asked a similar question about the CPU-Z configuration file option Sensor=0 to read Core VID. I got these two responses...

1. Core i7 no longer reports VID since it manages the vcore supply via it's on-die PCU.

2. the core i7 reports no VID

[Utnorris]

So I guess it's a guessing game on which batches will be good or not.

[jcool]

That's no joke. Air coolers simply aren't adequate for these chips once you breach the 4.0Ghz threshold. Decent H20 is the only way to go with these suckers. Or phase.....

Well not even phase can help you if you get one of the crappiest i7 ever made:



That's right, this is all I am going to get out of this dog chip. It does NOT work with the 20x or 21x mult (no not even 4,2 Ghz with 1,6V), only likes 19x.. which means you hit a brick wall above 210 BCK if you're shooting for real stability.
I need 1,46V VTT for 211 stable, 213 needs close to 1,6V VTT for linpack stability. Forget getting higher or forget real stability.

AND DO NOT BUY 3838A

[Classic Satch]

Well not even phase can help you if you get one of the crappiest i7 ever made:



That's right, this is all I am going to get out of this dog chip. It does NOT work with the 20x or 21x mult (no not even 4,2 Ghz with 1,6V), only likes 19x.. which means you hit a brick wall above 210 BCK if you're shooting for real stability.
I need 1,46V VTT for 211 stable, 213 needs close to 1,6V VTT for linpack stability. Forget getting higher or forget real stability.

AND DO NOT BUY 3838A

Ouch bro! That really sucks.

I know what you're talking about vis a vis those multipliers. My chip also hates 20x and 21x. I've been running it 211x19 @1.36v 24/7 with no issues at all. However, try to use 200x20 or x21 and it fails Prime within 30 minutes, regardless of voltage.

[Chicken Patty]

got a question guys. I got the EVGA X58 mobo, my NB temps are about 76ºc under a run on prime, and my Vregs are about 88ºc, is this too hot, or normal?

[eva2000]

That's right, this is all I am going to get out of this dog chip. It does NOT work with the 20x or 21x mult (no not even 4,2 Ghz with 1,6V), only likes 19x.. which means you hit a brick wall above 210 BCK if you're shooting for real stability.
I need 1,46V VTT for 211 stable, 213 needs close to 1,6V VTT for linpack stability. Forget getting higher or forget real stability.

AND DO NOT BUY 3838A

yikes that does sound bad but remember to isolate the memory stability side of things too as that can also cause instability and reboots under prime/all core stress tests.

[jcool]

Ouch bro! That really sucks.

I know what you're talking about vis a vis those multipliers. My chip also hates 20x and 21x. I've been running it 211x19 @1.36v 24/7 with no issues at all. However, try to use 200x20 or x21 and it fails Prime within 30 minutes, regardless of voltage.

Thanks man, I gotta get a different CPU.

yikes that does sound bad but remember to isolate the memory stability side of things too as that can also cause instability and reboots under prime/all core stress tests.

Thanks eva.. but I do know how to OC, ya know
Might have needed a few hours to get used to the DFI, but I have built a few rigs with the GA-EX58 Extreme so far so I really know my way around its bios - different mobo, same ty results
As for the memspeed, I tested with 6x and 8x dram mult, at high Vdimm and CAS9-9-9-24 with D9GTR mems
As for mem stability, I can run my 6GB D9GTR at 200x19 at 10x ram mult and CAS 8-8-8-20, but it needs 2,07V to pass memtest. Which seems to be the DFI 10x issue because it does the same at around 1,9V with 12x ram mult and lower BCLK and also on the GB at 10x
These are Diablos after all.

[LardArse]

i7 CPUs have no predefined VID, it's determined by speed and temperature at bootup as MRC Code runs. To get absolute voltage, select manually and not Auto

[eva2000]

Thanks man, I gotta get a different CPU.



Thanks eva.. but I do know how to OC, ya know
Might have needed a few hours to get used to the DFI, but I have built a few rigs with the GA-EX58 Extreme so far so I really know my way around its bios - different mobo, same ty results
As for the memspeed, I tested with 6x and 8x dram mult, at high Vdimm and CAS9-9-9-24 with D9GTR mems
As for mem stability, I can run my 6GB D9GTR at 200x19 at 10x ram mult and CAS 8-8-8-20, but it needs 2,07V to pass memtest. Which seems to be the DFI 10x issue because it does the same at around 1,9V with 12x ram mult and lower BCLK and also on the GB at 10x
These are Diablos after all.

yeah DFI 10x mem multi on bioses other than 12/18 are needing a bit more vdimm than before.. same issue with 01/06 bios but anyway still managed some nice mem clocks. Waiting on DFI to fix it in next bios

Mixed 2x1GB Corsair DDR3-2133C9DF Dominator Samsung HCF0 modules + 1GB G.Skill PC3-12800HZ Samsung 816 HCF0 module together for first time Samsung HCF0 based triple channel configuration. The G.Skills are holding back the clocks as they need around ~0.1-0.15v more vdimm at same clocks as Corsair 2133 stuff, but still managed to be Super Pi 32M stable @DDR3-2191Mhz at 1.965v bios set vdimm.

@DDR3-2191Mhz at 1.965v
Don't mind the slow PI time as just testing how far I can clock this mixed set of 3x1GB Samsung HCF0 modules



CPUZ Validation @DDR3-2211Mhz at 1.965v

Still at 1.965v vdimm set in bios so probably limited by max Bclk.

[jcool]

Yeah nice
Forgive me though I don't care one bit about Spi etc, I care about max 24/7 clocks at absolute stability so this thing can crunch some serious WUs. So I need a good CPU FFS. I bet I could run yours at 4,5-4,6Ghz 24/7
Give it to me hrhr

[eva2000]

Yeah nice
Forgive me though I don't care one bit about Spi etc, I care about max 24/7 clocks at absolute stability so this thing can crunch some serious WUs. So I need a good CPU FFS. I bet I could run yours at 4,5-4,6Ghz 24/7
Give it to me hrhr

for 24/7 probably better off dropping mem clocks and tightening timings for more effiency in mem bandwidth and latency

nooo not my baby i7 920s.. can't let them out of my sight

[jcool]

Yeah currently running CAS 7-6-6-15 at 210 BCLK 8x mem divider, works a treat