What is your current memory clock/voltage at? Remember the memory controllers are in the cpu die so they could be the cause of the instability.
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Memory's running JEDEC spec-that means 1333 MHz, 9-9-9-24 timings (among all the tons of other timings I could rattle off), 1.5V.
It hasn't demonstrated the instability of failing RAM either, if that's what you're thinking.
I still think I have a noticeably below-average chip, but with this recent discovery, I should be able to push it further than previously thought possible while maintaining stability, surely a valuable lesson to have if I get my hands on a better sample.
Edited by NamelessPFG - 10/30/13 at 9:07pm
Ok, if your memory has it try enabling the XMP profiles, they should up the memory voltages and sort out the memory timings, you can manually lower the actual clock speed if you want, its really the timing and voltages your after. Then retest the above.
Just had a quick look at mine and the XMP profile raised the VCCSA bus voltage which was one of the items that helped with the CPU overclock. DDR voltage also got bumped by the profile.
Edited by mcandmar - 10/30/13 at 9:34pm
No XMP profiles on this RAM; it's only rated for JEDEC spec. Only reason I bought it in particular was because it was just $120 for 16 GB (2x8 GB).
I wish the older prices were still intact so I could have 32 GB of guaranteed fast RAM for the same price or less. (And, yes, I would actually make use of 32 GB, be it through RAM disks or ludicrous multi-tasking.)
So far, VID at 1.395V (which is resulting in a VID of 1.393V and Vcore of 1.408V when booted into Windows for some reason), along with VCCIN at 2.05V, is allowing for Prime95 stability at 4.5 GHz...but it's also pushing my custom water-cooling loop to its thermal limits when I'm getting 86-90c peaks.
I could delid this chip, but it's really not worth it with this one. At least I've learned some valuable overclocking lessons for when I do get a good chip.
Ok, time to throw a spanner in the works. I'm not fully familiar with your chipset, CPU type but with the X79 / socket 2011 boards i found the limit of OC via the multiplier wasn't the end game, in some cases a lower multi and 1.25x base clock multiplier got higher clock speeds. It does however alter the other bus speeds for PCIe, DDR etc so it becomes a headache of making spreadsheets to work it all out.
May not be applicable to your board, but certainly worth looking into as there are many ways to skin a cat.
There is the possibility of using the 125 base clock strap, which will keep all the other bus clocks in line. Most Haswell chips can use that strap, though 166 and up are a crapshoot.
Right now, I'm pretty sure I have 4.5 GHz figured out, though the required voltages are obscene. Trying to raise my cache speed to bring it closer to the core clock, but I'm probably going to need some manual voltage adjustment above the 4.0 GHz mark. 1.3V is the suggested maximum for Vcache/Vring/whatever they're calling it, if I'm not mistaken...
Half Life, Deus Ex, Hitman, Splinter Cell.. ARKANOID .. Joking haha (still great games though)
League of Legends would definitely work smooth. Not sure if you're into Futball, but Fifa14 should work. Counter Strike : GO or AVA might be worth a shot as well.
There's plenty of aging games that are still fun to play. Depends on what genres you like.
Ooh, I shold be able to play LoL with my friend at language class then. Thanks.
Don't have Steam...yet. But considering my location, I think many of the games on Steam won't be accessible from this region. I heard Team Fortress 2 is free-to-play. I'd like to play that, and maybe add the Prop Hunt mod, XD
Depending on what resolution you plan to play at, you can probably run games like Mirrors Edge (low settings?), Half Life Series, Portal and Portal 2, Prototype, Team Fortress 2, Halo, Halo 2, older Call of Duty games (before they went bad), Tron 2.0 (awesome game), Final Fantasy 7, Supreme Commander, anything pre 2005 (I guess).
Heh, the HTPC in the living room runs on a 650 Ti Boost. Thanks a bunch for the replies. All I have to do is wait for the gaming mouse and I should be all set to play anything.
4.5 GHz is starting to prove unattainable if I start raising the cache/ring bus to match. Time to back off a bit and go for 4.4 GHz as a main overclock. Besides, trying to hit 4.5 GHz is pushing the very limit of safe 24/7 voltages (1.4Vcore, 2.0VCCID), and that's on a much higher-end cooling setup than what most people use.
Within the next week, once I've got the overclock settings for this chip figured out, I'm exchanging it for another i5-4670K in the hopes of getting higher up on the silicon lottery. I shouldn't need this much voltage just to hit 4.4 GHz if what everyone else claims on forums everywhere is true and they hold their standards of stability as rigorously as I do.
Simply put, failing ANY test, even the most demanding of synthetic stress tests that would pass at stock settings and is completely unindicative of real-world usage, is unstable in my book. There is no middle ground; even if it works fine with most of my real-world usage, I don't want to risk it failing under any possible workload.
Totally agree, even a rig that will run prime95 for a few hours before giving an error will be the kind of rig to crash out of games at the worst possible moments. I know i have my voltage set 2 levels above that point. Took a lot of trial and error and profanity to get there
I am a professional gamer.
NOT. I have engineering models of a whole bunch of Logitech mice, gaming ones included. Not that I use them.
Fail on my end... why not game on the HTPC if you can? Unless you hate gaming on TVs like I do. Though if you refer to the picture above,it isn't like I game all day. Wait, the HTPC probably doesn't even have an OS for gaming in it, lol.
Holy crap, this puts IntelBurnTest to shame. It's now peaking at 96c at 4.4 GHz/1.392Vcore (VID 1.37, I seriously tried it with lower values and it just won't stay stable otherwise), already higher than I'd like for a stress test.
Seriously, though, it took THAT much voltage just to get this thing stable for 6 hours on Prime95v279, the version I thought was the latest release until now. If you're complaining about not being able to hit 4.6-4.8 GHz due to temps going up to 1.4Vcore, but can hit 4.4 GHz with just 1.3Vcore or less and still remain stable? You don't know how good you have it, trust me.
Maybe I should keep this particular chip for an overclocking challenge. "How far can you push the worst-clocking i5-4670K ever?"
Edited by NamelessPFG - 10/31/13 at 10:21pm
Well, I guess we're like-minded then. I feel much more comfortable playing at my desk where I could go wired instead of forcing myself to stick with wireless outside.
Same here, and sometimes using a TV makes me have vertigo on fast paced games or some 3rd person games (i.e Dead Space, and never play games on a 52 inch TV, from a meter away, worse idea I've ever had). Not to mention I'd have to lug my computer over to the TV now, too much effort, then I'd have to lug it back over so I could actually do work on it. Way too much effort, my main screen is 1080p anyways, close enough. Lol, not that I game that much anymore.