My 2700K's power profile up to 5.2ghz < Updated

[Kenmitch]

Well I've had this 2700K for a couple of weeks and have been working on my overclock profiles. These are the results I've come up with. It seems like my chip scales pretty good. I like even numbered overclocks I guess.

I used a LLC of regular(none) with offset voltages. Some of the lower baby overclocks are in the - offsets.

This one looks to be a 24/7 doable overclock. The vcore fluctuates from around 1.34-1.38v's under heavy loads.

At this point I went ahead and disabled Hyperthreading as the temps started to get insane to me under heavy sustained loads. I did have to kick in some LLC to get it stable. Not an insane amount of voltage required but more than I'd be willing to run for 24/7 even on water. I'm not sure but for some reason the rig seems more responsive with Hyperthreading disabled. I may have to go back in my profiles and play around some more.

This one was just to see. Not sure I wanna pump more voltage into my chip. It was stable for some initial testing with IBT but the temps are up higher than I'd like. Even on water SB's can pump out the heat. Might play around later to see tho.

Playing around tonight. Not like I'd run it at this but my goal was 10 minutes of prime. Made that then took the screenshot and saved it. Went to photobucket and uploaded the photo. Prime is still running as I'm typing this. WTF I figured I get a BSOD by now. The funs over it managed about 32 minutes or so of prime before my web surfing made me BSOD....Maybe next gen I'll have better luck!

 

[stahlhart]

Does anyone know when these will be available again? I'm on the notify list at Newegg, but they don't have a date indicated for restocking.

Thanks for posting the results.

 

[tweakboy]

Great OP.... nice pics....

stahlhart what CPU you got now ? if you have a quad now,, just wait it out,, for Ivy Bridge and hopefully they fix the 23fps issue..... which I heard they would not.

 

[monkeydelmagico]

I'm not sure but for some reason the rig seems more responsive with Hyperthreading disabled. I may have to go back in my profiles and play around some more.

I've read recently that some folks were disabling hyperthread in gaming and getting better FPS. Food for thought.

Nice OC. From my perspective it's a drool-worthy clock speed.

 

[stahlhart]

stahlhart what CPU you got now ? if you have a quad now,, just wait it out,, for Ivy Bridge and hopefully they fix the 23fps issue..... which I heard they would not.

2500K. My wife wants to build a desktop upgrade in the new year, so I was going to cascade it to her and upgrade mine. I have a P67 board and don't use the IGP, so the sync issue is no biggie for me.

But I did do the BIOS upgrade that apparently supports 22nm, so... (?)

 

[Kenmitch]

Does anyone know when these will be available again? I'm on the notify list at Newegg, but they don't have a date indicated for restocking.

Thanks for posting the results.

Mine was $260 new and sealed impulse buy in the for sale/trade forum. Local seller met me at fry's 🙂

I think a couple more are still up for sale. Just gotta find a deal you can live with.

 

[Schmide]

What type of water are we talking here?

 

[Kenmitch]

What type of water are we talking here?

Nothing fancy just basic loop 🙂

 

[Grooveriding]

I wish I could get 4.8 stable with less than 1.45V, much less 5 or 5.1. Very nice 😎

 

[Schmide]

Dude that's a X-Flow extreme (80k) and a RX240 (155k), so you have like 225k mm of rad surface area. If you estimate your base wattage (no OC) at like 350w and fans at 1750rpm you have a Water-out Air-in delta of like 4.5c. In my humble opinion that is a bit more than a simple loop.

 

[Kenmitch]

I wish I could get 4.8 stable with less than 1.45V, much less 5 or 5.1. Very nice 😎

I got very lucky I think this time. It does seem to be above average. I just don't have the heart to juice her up and see what she'll max out at.

Dude that's a X-Flow extreme (80k) and a RX240 (155k), so you have like 225k mm of rad surface area. If you estimate your base wattage (no OC) at like 350w and fans at 1750rpm you have a Water-out Air-in delta of like 4.5c. In my humble opinion that is a bit more than a simple loop.

You lost me with the.technical talk. So I don't need to upgrade my cooling system. I was thinking it wasn't up to the task. My upper fans are kinda week 1250rpm scythe. The ones I wanted I guess not made anymore.

I guess basic as in built for temps and not looks. No fancy lights, fittings,etc.

 

[Schmide]

Note: See 2 posts below for wattage figures. The 450w figure was wrong.

Well at 5ghz sandy bridge does eat a lot of wattage. You're probably looking at an extra 100-150 watts. Add to that the 120-160w from your 5850 (load) and you're looking at around (edit) 300-350w of heat those two radiators have to get rid of. With 1250 fans you're then looking at an 5c Water-out Air in delta at that wattage. You would reach average water cooling performance (10c delta) at around 550w.

In terms of performance, 5c delta is considered extreme, which for your rad setup is around 300w.

Looking at your temps, that 4.8ghz seems like a sweet spot. You're probably eating another 75w going that extra 200mhz. If by chance you load your video card or expand your video card wattage, you could start hitting your radiators wall in terms of performance. Not to say it would ever not cool but its delta would go up marginally.

 

[Kenmitch]

Well at 5ghz sandy bridge does eat a lot of wattage. You're probably looking at an extra 100-150 watts. Add to that the 120-160w from your 5850 (load) and you're looking at around 450w of heat those two radiators have to get rid of. With 1250 fans you're then looking at an 8c Water-out Air in delta at that wattage. You would reach average water cooling performance (10c delta) at around 550w.

In terms of performance, 5c delta is considered extreme, which for your rad setup is around 300w.

Looking at your temps, that 4.8ghz seems like a sweet spot. You're probably eating another 75w going that extra 200mhz. If by chance you load your video card or expand your video card wattage, you could start hitting your radiators wall in terms of performance. Not to say it would ever not cool but its delta would go up marginally.

During the screenshots I was running Intel Burn Test so my temps are somewhat unrealistic I guess. Normal everyday use temps would be much lower I'd think....But there is always room for improvement.

You seem very knowledgeable on water cooling. I'm currently using Scythe S-FLEX SFF21E 120mm fans to mount my rads. I have 1 xtra one I found the other day. Would it help my temps if I mounted it in push on the upper rad? Would it be better to mount it on the xflow rad in push as the fins are tighter? Or would I be better off looking for some higher speed fans? If so what would be good ones that have good airflow, no led's and won't make my ears bleed from the noise? Also looking at the routing of my loop would it be better to go from pump to cpu inlet first? Or is it one of those doesn't make much of a diff things. I kinda like the way the routing is as it's very easy to swap motherboard combos.

 

[Schmide]

I was tired as I wrote the original figures. I added the video card wattage twice. So all the above figures have an extra 150w in them. Doh. The radiator heat levels are all relatively ok though.

So summing and reviewing.

Processor
Not OC - ~100w
4.8ghz - ~150-175w
5ghz - 200w++

Video Card
Idle - 25w
Full load - 125-160w

So running processor only tasks you're

Stock - 125w
4.8ghz - 175-200w
5ghz+ - 225w+

Loaded with video card

Stock - 250w
4.8ghz - 300-350w
5ghz+ - 350-400w+

So if you're ideal is to keep your Water-out Air-in delta around 5c which for your rads and fan is around 300w, you should be fine with the current setup. If you were to add a extra 150w to the system with an extra video card, you would probably see an extra 3-5c jump.

So in my opinion you should be fine as you are.

 

[Kenmitch]

I was tired as I wrote the original figures. I added the video card wattage twice. So all the above figures have an extra 150w in them. Doh. The radiator heat levels are all relatively ok though.

So summing and reviewing.

Processor
Not OC - ~100w
4.8ghz - ~150-175w
5ghz - 200w++

Video Card
Idle - 25w
Full load - 125-160w

So running processor only tasks you're

Stock - 125w
4.8ghz - 175-200w
5ghz+ - 225w+

Loaded with video card

Stock - 250w
4.8ghz - 300-350w
5ghz+ - 350-400w+

So if you're ideal is to keep your Water-out Air-in delta around 5c which for your rads and fan is around 300w, you should be fine with the current setup. If you were to add a extra 150w to the system with an extra video card, you would probably see an extra 3-5c jump.

So in my opinion you should be fine as you are.

Thanks for posting back!

I did a test video rip this AM at 5ghz no hyperthreading. If I get over the vcore 5ghz is doable.

 

[Kenmitch]

Just toying around with my chip to see if it'll boot at 5.2ghz after a couple of bsods I've somewhat got some stability. My goal was 10 minutes of prime....She keeps a chugging along tho. Temps are not to my liking so I'll have to shut her down soon.

 

[fastamdman]

Use a real test like LinX and you will find out the true meaning of stability 😉

 

[Kenmitch]

Use a real test like LinX and you will find out the true meaning of stability 😉

It's one of those try and see if it'll boot experiment. I don't plan on running it at 5.2ghz at all. My water cooling can't tame the beast at 5.2ghz. 🙂

I'm gonna try IBT for about 2 seconds or so just to see if it BSOD's on me.

I did get prime to run about 32 minutes before my web surfing put it over the edge and I had a BSOD 🙂

Just made a little tweak and gonna try a quick IBT to see the GFlop output. Most likely it'll BSOD as I'm on the verge of stability but just don't wanna push the vcore anymore.

EDIT: Yep I was correct...Fires up IBT 3,2,1 Lights go out and nobody's home Black screen BSOD.

Lessons learned:

It's hard to get stability at 5.2ghz without going crazy on the voltage.
The max VID my chip feeds my MB is 1.3875v's
When stability testing start with IBT as it's quicker than prime!

Back to my conservative 4.8ghz @ 1.360v's 🙂

 

[fastamdman]

4.8 at 1.36vcore is great. Test that in IBT for 12hrs and see if it passes. Most chips take more then that, so if that truly does pass, congrats on having a nice chip 🙂