DDR3 at 2400 holding back my 4770k?

C

c3k

2[H]4U
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Sep 8, 2007
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Folks,

Running some quick and dirty OC's w/a 4770k on an Asus Z87 Pro. I've got 16Gb of G Skill DDR3-2400 PC3-19200 Ram (2 x 8Gb (11-13-13-31, 1.65v ratings)) in the machine running at the rated 2400 Mhz.

My 4770k (delidded, AIO water-cooled, chill temperatures. Never seen 'em above 45C yet. Not that I've tried to really stress them...), only hits 4.7 or 4.8 Ghz when I overclock using the Smart AI suite. (Yeah, I know. Like I said, I'm hitting it quick and dirty right now.)

Anyhow, what kind of suggestions do you have for my RAM speed to get a better CPU overclock? Should I drop as low as 1600 Mhz? I understand any ram speeds over Haswell spec can really knock down the CPU. Is that what I may be facing?

Thanks,

Ken

More info on ram: 2T, 1:9 FSB:DRAM ratio.
 
only 4.7-4.8ghz?

you need to stop hanging it out in forums where they use LN2 with 1 out 100 cpu's that can hit over 5ghz.

you should be happy with that overclock.
 
lol!

If only everyone was as lucky as you are and could hit 4.7ghz with their 4770K!!!

I agreed with the poster above, be happy with that overclock, you're pretty much in the top 10% there.
 
ddr3 1600 and 1866 are good speeds with tight timings VERY LITTLE benefits from the ram running a wicked speed as the timings are to loose and few things need that extra bandwidth, games sure as heck see very little from it.

2T timing is fine but 1:9 FSB ratio is very high so yeh. it is a very high ram speed for sure but to many factors I think are going to prevent you from getting the speed boost you think you should be getting.

And well, any current Intel chip at 4.5+ is plenty fast, don't take a chance on killing it for nothing, unless you have $ to throw around, then well, you can get me a similar setup I will treat it nice :)
 
Voltage? Who looks at steenkin' voltages? :)

Seriously: Voltages, Haswell, and UEFI have me totally befuddled. I'll check w/cpu-z...


So, that's a decent OC? Good for me. I delidded this thing. Hammer and vice method. Man, did it take a walloping before the darn lid would come off. I've hit rusted lug nuts with less force to knock 'em loose. So, delidded, then smeared some cool laboratory liquid pro on it, and put the lid back on. A little NH1T (or whatever Noctua calls their goop) between the lid and Kraken x60. Then, I pressed the Asus Smart AI III overclock button.

Off to do some more checks...
 
Gah!

So, I downloaded a copy of prime. Apparently, I should've checked my download. A**holes stole my toolbar, my homepage, and my search engine. At least M$ makes it easy to reset everything. Not.

Anyway, I've changed -something- since my last OC. After several attempts, I've stopped running the Asus AI Suite III. First run through, 4.7 Ghz single and dual core, 4.6 for 3 or 4, then a blue screen. Hmm, let me run it again. 4.6/4.5. What? Okay, again! 4.5/4.4. And there it sits. <sigh>

So, maybe I was totally unstable and hanging on the ragged edge. Maybe I've got something undervolted, overvolted, underfanned, or just electron migrated worse than a 40 watt phased plasma rifle.

Now I really need to dig into this thing. Squirrelly little guy just won't stay still.

Ken
 
DDR3 at 2400 holding back my 4770k?
Click to expand...
No.

Anyhow, what kind of suggestions do you have for my RAM speed to get a better CPU overclock? Should I drop as low as 1600 Mhz? I understand any ram speeds over Haswell spec can really knock down the CPU. Is that what I may be facing?
Click to expand...
Try it, no need to ask.
 
First off Asus Suite software is garbage. No one uses it and it jacks up voltages to the it is pointless. I do understand you are just doing quick overclocks though. We just set a voltage-multi and if it boots , then we go from there.

Curious to what voltage the Asus suite was pumping through the cpu though. Your 2400Mhz ram should be plenty fast for the 4770k. We use the faster ram to test the IMC and for ram synthetic benchmarks for HWBOT.

Daily users will not tell the difference between the lower mhz ram vs the higher end ram. But the higher end ram is basically a few bucks more. So buy it and be happy. You can have the best of both worlds then. Plus you know your overclock will not be limited by your ram then.
 
I wouldn't worry too much about that cpu and asus auto settings. The problem with running avx instructions on Haswell in that way is that it in no way reflects normal usage. If you don't have your main voltages set under manual config in bios the mobo will ramp the crap out of voltages under heavy stress. Everyone is forced to push their clocks down to be prime stable. Then you may still get crashes when c_States kick in. It's just not as solid a stress tool as it once was. If you want to really see how much stress your chip can take and still do math check out prime95 v28.1.

As I understand it, it is possible your OCd RAM is keeping your processor from being prime stable at a given frequency. Try it at 1600 and see if your results change. They may not, it depends on the quality of the members controller on your chip I would think.
 
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Thanks for the words. I need to get a handle on the slew of voltage options available in the uefi and figure out which ones to freeze, which to leave in default, which to set manually, and which to start adjusting.

Then, I'll drop the ram freq down, and see if I can get this cpu up a bit more.

Thanks,
Ken
 
So what CPU-Z shown as your voltages during that Asus AI overclocing sesion?
 
Quick blend test, cpu-z showed my multi as only 43 despite the range being 8-44.

Voltage = 1.317

(I had a bunch of open stuff when I ran it, including a game. :) )

Looks like I have some work to do.
 
Very little real world gains with RAM over 2400, just leave it there and find the max CPU clock.

Also, if I were you, I'd skip the software and start learning how to do it from the bios, you'll be better off in the long run.
 
julliboo said:
This scares me. Haswell build starting soon haha
Click to expand...

I'm serious though. You don't even need a top-of-the-line mobo or ram, OC'ing will largely be isolated to whether you got really lucky and got a great chip or just a meh normal chip. I'm kinda disappointed I wasnt able to get to 4.6 ghz but it's only 200 mhz right. : /
 
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