2500k @ 4.5ghz with Vcore @ 1.18

[Shoda]

Hello,

I am currently running my 2500k @ 4.5ghz. I have it OC with an offset of -.100 which gives me a Vcore of 1.18 when running Prime95. I am cooling it with a H100 (push with stock fans) on medium setting.

Temps:
Max Load - 56°c, 53°c, 61°c, 61°c
Idle - 25°c, 29°c, 27°c, 31°c

I was wondering since my temps and vcore is still very low, if I should just push it even more since it seems like I still have a lot of headroom? So, I want some opinions! I'll do an extreme to see just how far I can get, but I think I am going to leave it as is for my everyday use.

Here is a finished 20 iteration run of Intel Burn Test.

Max Vcore - 1.2v (However, it was pulling 1.184v most of the time)
** I know that HWMonitor says max Vcore is 1.23v, but that was there even before I started the test. Should have cleared the min/max values first.

Prime95 Run:

 

[Soccerman06]

I see 1.6ghz at .89v

 

[Schmide]

How about an OCCT screeny at full load?

 

[videogames101]

Pump it up =D

I have no doubt you could hit 5ghz, vcore on Sandy's is generally considered good up to about 1.4v, you'll just have to watch temps, try turning your fan settings up to high. Above that(~1.4v) tread at your own risk. Intel specs up to 1.53v, but I wouldn't tell anyone to run their chip that high if they dont want to start affecting chip lifetime, even a tiny bit.

 

[Idontcare]

Here is a finished 20 iteration run of Intel Burn Test.

Max Vcore - 1.2v (However, it was pulling 1.184v most of the time)
** I know that HWMonitor says max Vcore is 1.23v, but that was there even before I started the test. Should have cleared the min/max values first.

Dang! That's really good. Mine needs 1.29V to run at that clockspeed, with an H100 push/pull too.

So you are definitely headed to 5GHz if you want it. I bet you'll see it with 1.4V (possibly less).

Congrats on the stellar chip! :thumbsup:

 

[Rvenger]

Mine seems to be doing the same. I can get 4.5 with no vcore increase at all. I hate to even push it to 5.0 then it will probably start degrading. I think I am going to leave it at 4.4ghz since I am happy with that speed.

BTW, I did just purchase this chip recently. My older chips were unable to reach this clockspeed with lower voltages.

Edit: Imagine that, same board as me!

 

[Shoda]

Here is the screen shot with Prime95 running and it showing my voltages and my 4.5ghz OC.

 

[Diogenes2]

Very nice chip ...
Have you tried 5ghz ?

 

[Shoda]

I see 1.6ghz at .89v

Posted screen shot showing my voltages and my 4.5ghz OC. Take a look now.

 

[Shoda]

Mine seems to be doing the same. I can get 4.5 with no vcore increase at all. I hate to even push it to 5.0 then it will probably start degrading. I think I am going to leave it at 4.4ghz since I am happy with that speed.

BTW, I did just purchase this chip recently. My older chips were unable to reach this clockspeed with lower voltages.

Edit: Imagine that, same board as me!

I just bought my chip recently as well. Bought it on Black Friday from Microcenter for $149.99! Thank you to the Microcenter guy who handed me this particular chip! Thank you! lol

Very nice chip ...
Have you tried 5ghz ?

I have not. I do not have the time right now. I will try and OC it to 5ghz this weekend of possible.

 

[gevorg]

5GHz at <=1.4v would be impressive!

 

[Duvie]

That is pretty awesome....Mine at 4.5ghz needed 1.28v under load to go 9+ hours....

Make sure you let prime95 run a bit...I see you took the screen pic at 30 min into the test. You may not have hit your highest temp or found stability.....My chip can run benches at 1.22v though not stable....can even run prime95 small FFT at 1.25v for 20-30 min before I stopped it. It did error out in OCCT/LinPack though...so I notched it up

Your load temps look in line...I am using a push pull method as well with an H100....I get 57-58c with that prime95 smallFFT test, whic would make sense since I am a bit more vcore than you....

 

[Rvenger]

I just bought my chip recently as well. Bought it on Black Friday from Microcenter for $149.99! Thank you to the Microcenter guy who handed me this particular chip! Thank you! lol



I have not. I do not have the time right now. I will try and OC it to 5ghz this weekend of possible.

I purchased mine on Amazon but it had the Microcenter price tag on it. The company probably bought it for $149 @ MC and turned around and sold it to me for $200 This board seems to have a good VRM and I think that is partly contributing to the stable overclocks.


Shoda, Check your Vdimm voltage. I had to set mine manually because the board defaults to a 1.67v vdimm! I am seeing 1.67v -1.69v on HW monitor and I am thinking that might be your vdimm.


Is this similar to how your overclock is set up? http://forums.anandtech.com/showpost.php?p=32663935&postcount=9

 

[bryanW1995]

Mine seems to be doing the same. I can get 4.5 with no vcore increase at all. I hate to even push it to 5.0 then it will probably start degrading. I think I am going to leave it at 4.4ghz since I am happy with that speed.

BTW, I did just purchase this chip recently. My older chips were unable to reach this clockspeed with lower voltages.

Edit: Imagine that, same board as me!

The amount of electromagnetic migration you experience from a slight vcore bump is almost certain to NOT limit the usable life of your cpu. A general rule of thumb is to keep vcore bump to <= 10&#37; of stock. If your chip is able to get 4.5 with no vcore, you are committing an overclocking felony (tm) if you don't push it to see what it will really do.

By the way, my 2500k + cpu + cpu cooler is "out for delivery" today, and I am going on record now with a solemn promise to my AT breathren: I will overclock the crap out of this sucker and push it to the edge of stability. If I can get 5.0, I'll do it. I will run DC 24/7 unless I turn it off to play a demanding game and forget to restart BOINC. And I will give the rig to my mom in a few years and let her keep plugging away with it on DC 24/7. Is this on a $200 mobo? Of course not, it's a GB micro atx board that was $94 after the $20 pkg discount at newegg. And I'm certain that it will last just as well as my ip 35 e mobos, both of which have outlasted my ip 35 pro and cost 1/2 as much. In fact, I finally gave one of the ip35e systems (with a q9450) to my daughter's school the other day to replace their coppermine 700 (no joke). Oh yeah, and after I overclock the crap out of it I'll try my hand at a partitioned 80 gb hd with the OS on one side and SRT on the other, and any other cool acronym that intel or GB have to offer.

Maybe I've been reading too many action novels.

 

[Duvie]

I purchased mine on Amazon but it had the Microcenter price tag on it. The company probably bought it for $149 @ MC and turned around and sold it to me for $200 This board seems to have a good VRM and I think that is partly contributing to the stable overclocks.


Shoda, Check your Vdimm voltage. I had to set mine manually because the board defaults to a 1.67v vdimm! I am seeing 1.67v -1.69v on HW monitor and I am thinking that might be your vdimm.


Is this similar to how your overclock is set up? http://forums.anandtech.com/showpost.php?p=32663935&postcount=9

Is he running an AsRock Gen3 Extreme3 as well?

 

[SHAQ]

What is the batch number and can you get any more? lol

 

[Magic Carpet]

Some really nice undervolting going on here... Silicon is getting better and better as it appears

 

[Shoda]

I purchased mine on Amazon but it had the Microcenter price tag on it. The company probably bought it for $149 @ MC and turned around and sold it to me for $200 This board seems to have a good VRM and I think that is partly contributing to the stable overclocks.


Shoda, Check your Vdimm voltage. I had to set mine manually because the board defaults to a 1.67v vdimm! I am seeing 1.67v -1.69v on HW monitor and I am thinking that might be your vdimm.


Is this similar to how your overclock is set up? http://forums.anandtech.com/showpost.php?p=32663935&postcount=9

They are quite similar. However, my DRAM Voltage, PCH Voltage, etc. (the last BIOS picture) are all set to auto. I'll write down my exact BIOS settings later. Gotta head to class!

What is the batch number and can you get any more? lol

Haha! Pretty sure this was a rhetorical question, but I'll answer it anyways. Batch number is: 3134B737

 

[Rvenger]

My batch# is 3134b737 too

 

[Duvie]

Mine is odd...

L140B450

 

[Rvenger]

Is he running an AsRock Gen3 Extreme3 as well?

Yes

 

[Shmee]

That is an awesome chip. See how far you can go with around 1.3 V (still plenty safe) also have you tried Linx and other stability tests as well? That is amazing.

 

[SHAQ]

My batch# is 3134b737 too

That seems like the batch to have. I was going to wait for the 2011 quad or IB but I would be tempted to get a 2500K if I could get one from that batch. If I had a local MC I would check it out. Hopefully all the later batches will be like this.

 

[FAUguy]

I have to use a voltage offset of +0.65 (and LLC 5) to get my 2600k to be stable at 4.5GHz on ASRock Fatal1ty Z68 Pro.

 

[liyi0522]

I have ASRock Extreme 3 Gen 3 pair with i5 2500K, 1.25V OC to 4.8. When I run prime95, some time it shows 4.1 to 4.3 at CPU-z. You guys have same problem?