Question On 2500k at 4.6ghz

[trt740]

All that talk about OC-ing DDR3, and I've decided to push the Crucial DDR3 1866 4x4GB kit I have in my main rig. As-much-as I'd like to buy 16GB of 2400, I just can't at the moment.

But, I had been stable at 2133 for some-time, pushed and got 2200 without too much more work. Right now I'm pushing 1.65v and 11-13-13-31 timings...not stable at 2400...well bench stable. Boots to Windows fine-ish.

I figure 2400 might be asking too much out of these sticks...but 2133 was pretty damn easy to achieve...mostly just relax timings a little bit, and a small voltage bump to 1.55v.

And before I finished this post, I talked myself into grabbing those Corsair Dominator Pro's from Newegg for $96 shipped for 16GB (2x8) 2400 CL11....until they arrive, challenge accepted on my current RAM without smoking em...as I may sell them to recoup some losses or better yet...cover it up before the wife notices!

Also, after reading you were able to achieve 2400 @ 1.5v, that has my interest as I love to run undervolted at high speeds with stability...you know air cooling and all, it helps plus it adds a good challenge. My CPU voltage tuning took forever...I first undervolted at stock (4.0, and 4.4 turbo)...then once I found that stable...started OC-ing. The Z87 board I use has an adaptive feature which will only add voltage on the turbo clock voltage. In short I add an extra offset to compensate for the undervoltage using the adaptive so I have the voltage I need for being in the turbo clock range...yet can idle nice and low. I also noticed that setting the ring/bus min. multi to 8X from 40X (default 40 min/max), drops idle power consumption...I was able to notice this from my UPS even. Not that any of this helps you or this topic...more-so you inspired me to tune further even though I was content! That's what TPU is about!

Glad you're happy with your upgrade path @trt740 , the one issue I have with these budget SB and IB builds is the mainboards. Getting more expensive to find the good ones...but when you already have a good board, why not? I still think you should delid your 3770K. I want to delid my 4790, see if I can get 5GHz on air... but I'm gonna wait until the warranty expires.

Regardless, looking at the 7700K reviews, I don't think we're missing much if we're not taking advantage of the newer features that Z1xx and Z2xx boards bring to the table or are worried about decoding 4K videos.

The best thing I bought, believe it or not, is this SSD. Wow!!! Now this improves my computing experience

 

[Kursah]

Yep the SSD does make a nice difference! I have 2 SSD's in my main rig, a 250GB 850 EVO for OS and Space Sims, and a 960GB Crucial for games and programs. Between that and having enough RAM for multitasking as a gamer makes a huge difference!

 

[trt740]

Hey Kursah did you ever here turning off C states actually negatively effects the new generation of intel chips overclocking. That's per Asus and there overclocking guide. I just read it and after following it my temps went down. It's a good read. It was for p67 board but should apply to all boards. It from their staff. I will send it too you.

FYI talking about Sandys here


From Asus
"1. Approximately 50% of CPUs can go up to 4.4~4.5 GHz
2. Approximately 40% of CPUs can go up to 4.6~4.7 GHz
3. Approximately 10% of CPUs can go up to 4.8~5 GHz (50+ multipliers are about 2% of this group)
Additionally it is recommended to keep 「C1E」and「EIST」option enabled for the best overclock scaling. This is different than previous Intel overclocking expectations where the best scaling was with disabled power states or power management options."

"Quick Note regarding Voltage Scaling â“ Internal binning of both D1 and D2 parts we discovered consistent voltage scaling patterns.
1. For K series parts, the stock voltage supplied will allow for consistent overclocking generally up to a multiplier of 43x. There is potential for the multi to be raised to 44x depending on the load induced. This default voltage range be approx 1.240 to 1.260 under load.
2. Increased range between 44 to 47x multipliers will generally require a voltage range between 1.30 to 1.375V with an LLC recommended setting of high to ultra high.
3. Increasing the range between 48 to 50x multiplier will generally require a voltage range between 1.40 to 1.500 with a LLC recommended setting of ultra high.
4. Increased range between 50 to 52 (52 generally considered peak max multiplier except for rare 54x parts) will generally require a CPU voltage range between 1.515 to 1.535V with LLC at Ultra High and potential fine adjustments to the CPU skew range."

My new 3770k is acting just like this. I'm in the 50 percent range.

 

[Recon-UK]

I had a very hot running 2500K but it could hit 5ghz on only 1.4v and also boost 2 cores to 5.2ghz on the same voltage, it was a turbo mode on top of turbo mode.

 

[trt740]

nice

I turned a few thing down and my 3770k is still hot but not near as hot. Asus says that c states when off hurt overclocking tell after 5.0ghz and make your hard drive run like crap. Also, turning them off makes your chip run hotter. Atleast thats how I read it. I will send you the link. It is old but still very informative. I find it interesting the the older intel chips needed 1.3v or higher on average to reach 44-47Ghz. I thought I had a bad chip on the 3770k, but I really had a great 2500K and a average 3770k. The thread is mainly about Sandys. Currently running at higher voltage 1.28v to 1.3v and was hitting 90c but now at max 78c. I have always turned them off for overclocking. Testing with intel's own Cpu Extreme Tuning Tool. I am sure you guys have used this but if not here it is. I like the tool but a known glitch is it does not list your active core count right in some parts of the tool but then shows them all stressed. Other than that, it is very cool.

http://www.intel.com/content/www/us...s/intel-extreme-tuning-utility-intel-xtu.html

 

[peche]

@trt740 you should delid for better temps lad, ivy's run hot, i have 3, my own 3770 on my gaming rig, and 2 machines with 3770 for office purposes, 1 is crunching 24/7, running delidded with stock cooler and max temps are like 76-82c, also running on a crappy cheap generic case with a horrible fan setup,

 

[The N]

Ivy bridge is a bit more hotter when it comes to overclocking especially beyond 4GHz.
i guess 4.5GHz would be a fine deal.

 

[trt740]

@trt740 you should delid for better temps lad, ivy's run hot, i have 3, my own 3770 on my gaming rig, and 2 machines with 3770 for office purposes, 1 is crunching 24/7, running delidded with stock cooler and max temps are like 76-82c, also running on a crappy cheap generic case with a horrible fan setup,

I'm thinking about it .

Ivy bridge is a bit more hotter when it comes to overclocking especially beyond 4GHz.
i guess 4.5GHz would be a fine deal.

Mine seems to be happy just below 1.3v, like 1.28v 4.4 ghz. It for sure will go higher but needs to much voltage for my cooler. It is very fast so no worries. It will boot at 4.8 ghz 1.4 v

 

[peche]

I'm thinking about it .

you must, also ivy's are the easiest processors to delid now days, and your unlocked one will show up a incredible temp drop out

 

[Mussels]

Mine seems to be happy just below 1.3v, like 1.28v 4.4 ghz. It for sure will go higher but needs to much voltage for my cooler. It is very fast so no worries. It will boot at 4.8 ghz 1.4 v

its not the cooler, thats the thermal wall for delidding - you need to delid to pass the 4.5 mark, or the heat doesnt leave the CPU to reach the heatsink in teh first place.

dont forget that you'll need a good paste/liquid metal for it to work properly, as MX4 was 'running' out of the die/IHS on me and needing to be reapplied every 2 weeks.

 

[trt740]

Pro Meg was so good in the past, I could run (just one fan in pull) towards the back and leave my ram slots open for taller ram with zero difference from two fans in push pull. This is because it's heatpipes are so efficient.

 

[crazyfrog]

I've had 4 2500k CPUs since 2011 and ran my first till march of last year. Most of these chips will hit at least 4.8ghz in a overclocking board some will require more voltage to get to that. I was able to run my first 2500k at 4.8ghz 1.35v but ultimately moved to a mini itx with a 4.2ghz OC due to crap vrms as I didnt need the cpu performance with a 660 ti, later when I upgraded to a gtx 970 phoenix and even overclocked I had massive issues with frame pacing in my games due to bad cpu performance so I downgraded to a gtx 960.
I started building budget games PCs late last year and got some ebay £50 2500k CPUs and asus p8p67 motherboards with 16 phase vrms. Overclocking these only 1 of the chips refused to run above 4.8ghz while the other 2 ran over 5ghz and required 1.42v to be stable. The most important part of the 5ghz overclock is to take advantage of BCLK overclocking with a speed of 103 as oppose to the stock 100. Overclocking the BCLK also allows for more memory bandwidth which helps when using higher end GPUs. I suspect if the Ivy/sandy bridge platforms didnt have buses linked in the way they do the 2500k would prefer bclk overclocking over multiplier overclocking like previous intel platforms.

When I came to upgrade and move my system away from mini itx last summer I got a 3770k and asus maximus at a bargain £150. I overclocked the 3770k to 4.6ghz which required delidding and used compatible 2400mhz ddr3 which sandy bridge doesnt support. This overclocked combo works out to run at same speeds as a 6700k at stock speeds in my speed tests.

BTW 2500k CPUs are soldered instead of using thermal paste like newer intel processors so thermals arent bad at all. I was able to reach 5.047ghz @1.42 with an Arctic Freezer 13. After an hour stress test the hottest core ran at 74oC.

 

[The N]

I've had 4 2500k CPUs since 2011 and ran my first till march of last year. Most of these chips will hit at least 4.8ghz in a overclocking board some will require more voltage to get to that. I was able to run my first 2500k at 4.8ghz 1.35v but ultimately moved to a mini itx with a 4.2ghz OC due to crap vrms as I didnt need the cpu performance with a 660 ti, later when I upgraded to a gtx 970 phoenix and even overclocked I had massive issues with frame pacing in my games due to bad cpu performance so I downgraded to a gtx 960.
I started building budget games PCs late last year and got some ebay £50 2500k CPUs and asus p8p67 motherboards with 16 phase vrms. Overclocking these only 1 of the chips refused to run above 4.8ghz while the other 2 ran over 5ghz and required 1.42v to be stable. The most important part of the 5ghz overclock is to take advantage of BCLK overclocking with a speed of 103 as oppose to the stock 100. Overclocking the BCLK also allows for more memory bandwidth which helps when using higher end GPUs. I suspect if the Ivy/sandy bridge platforms didnt have buses linked in the way they do the 2500k would prefer bclk overclocking over multiplier overclocking like previous intel platforms.

When I came to upgrade and move my system away from mini itx last summer I got a 3770k and asus maximus at a bargain £150. I overclocked the 3770k to 4.6ghz which required delidding and used compatible 2400mhz ddr3 which sandy bridge doesnt support. This overclocked combo works out to run at same speeds as a 6700k at stock speeds in my speed tests.

BTW 2500k CPUs are soldered instead of using thermal paste like newer intel processors so thermals arent bad at all. I was able to reach 5.047ghz @1.42 with an Arctic Freezer 13. After an hour stress test the hottest core ran at 74oC.

While you are pretty lucky on chips, My mostly overclocks on 2500K went over to 1.45 voltages for 4.9 - 5GHz with a CM V6GT. On the other hand, I am able to pass through 5GHz on 2600K and touched 5.2GHz, however, with 1.52GHz only desktop stable. Ahh, those were precious days of overclocking. I have had own 3x 2500K chips within one year period.

Currently, using Haswell 4670K which are hotter especially when its comes to overclocking, however, luckily I went up to 5GHz on air with browsing stable hehe ...... Using Noctua NH-U14S air cooler