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[Official] Haswell Owners Thread - Page 355

post #3541 of 3650
Quote:
At the moment I have what I would consider to be the average RAM frequency of 1600Mhz but I have CAS8 dimms which is low latency. Should I stick at 1600Mhz and CAS 8 or loosen up my timings and increase the frequency.

Benchmark and see which is better.
Quote:
How much does overclocking RAM affect the CPU overclock with Haswell and second, frequency vs timings?

Not at all usually, especially on a low frequency like 1600-2000 - and again, benchmark.
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post #3542 of 3650
Quote:
Originally Posted by VindalooJim View Post


*Claps slowly*

So you're saying all overclocking is the same o.0....alrighty then.

Overclocking RAM isn't like overclocking a CPU or overclocking a GPU. You have a trade off between frequency and timings.

At the moment I have what I would consider to be the average RAM frequency of 1600Mhz but I have CAS8 dimms which is low latency. Should I stick at 1600Mhz and CAS 8 or loosen up my timings and increase the frequency.

Two main factors here. How much does overclocking RAM affect the CPU overclock with Haswell and second, frequency vs timings?

Frequency and timings... to get... more speed. Go run a benchmark to see what's faster and what's slower. Again, isn't this what everybody does for every single ram overclock?

 

No, no major CPU oc/Ram oc connection.

*claps slowly*

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post #3543 of 3650
Using a 4330 until Broadwell comes out. Then I'll get a high end i5

Sent from my Galaxy Nexus using Tapatalk
post #3544 of 3650

Weren't the rumors saying it was originally slated for April 2014? Or am I completely wrong?

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post #3545 of 3650
Didn't the rumors say incompatible with z87 too? ^.^

Not sure what to believe
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post #3546 of 3650
Quote:
Originally Posted by VindalooJim View Post

Should I stick at 1600Mhz and CAS 8 or loosen up my timings and increase the frequency.

I think Anand did a big memory speed test with Haswell and found that speed is generally better than timings, but that there was a sweet spot that was better than either extreme. Someone else did a test with Ivy (I think it was) and found pretty conclusively that freq was more important than timings, but that may have changed with Haswell.

Edit: Here's the link from X-bit for the Ivy testing.
Quote:
Thus, memory timings have indeed become a rather insignificant parameter for today’s computers. When choosing DDR3 SDRAM for an Ivy Bridge processor, you should consider its clock rate in the first place whereas a low CAS Latency and other timings are in fact unimportant. The same goes for tweaking and overclocking: you should first focus on increasing the clock rate of your DDR3 SDRAM and only then minimize its latencies if you want to.

http://www.xbitlabs.com/articles/memory/display/ivy-bridge-ddr3.html

Edit 2: Here's the Anand link.

http://www.anandtech.com/show/7364/memory-scaling-on-haswell
Edited by Forceman - 2/23/14 at 12:44pm
post #3547 of 3650
Just got myself a Haswell (4770k) and I'm already considering returning it and playing the silicon lottery again. Love the chip and all, it's been solid... But after a couple of days of tweeking and testing, I've come to the conclusion that the one I got is just plain bottom of the barrel. Heard of a few people with similar issues, so it seems this chip is perhaps even more of a lotto than others.

Running it on a GA-Z87X-OC with Crucial Ballistix Sport RAM @ 1600mhz / 1.5v (tried 1333 also). Using an H50 cooler.

I can hit 4.3ghz without it putting up much of a fight at ~1.25v but as soon as I bump it to 4.4 I'm having to go all the way to 1.360v for any kind of stability. Currently I'm sitting at 4.4ghz @ 1.36 vcore, with the uncore at 4ghz (1.15v). I'm certainly not displeased with this speed and there isn't any actual reason why I need it to go any faster, but it seems the majority of users are able to squeeze quite a bit more clock speed out of this, especially at the voltages I'm running at.





Yes I realize the temps I'm getting are pretty high, but that could be reduced if I played with my cooling setup a bit and possibly even a delid/TIM swap. Major concern is just the fact that I'm having to get the voltage that high to even reach 4.4, while most users seem to be able to get 4.5 at >1.3v.

Do I need to go any faster than that? Nope, just mildly annoyed at being on the bottom of the barrel of these Haswells. smile.gif




TL;DR: I'm sad cuz my badass CPU isn't moar badass. To return or not to return.... smile.gif
post #3548 of 3650
Quote:
Originally Posted by Forceman View Post

I think Anand did a big memory speed test with Haswell and found that speed is generally better than timings, but that there was a sweet spot that was better than either extreme. Someone else did a test with Ivy (I think it was) and found pretty conclusively that freq was more important than timings, but that may have changed with Haswell.

Edit: Here's the link from X-bit for the Ivy testing.
http://www.xbitlabs.com/articles/memory/display/ivy-bridge-ddr3.html

Edit 2: Here's the Anand link.

http://www.anandtech.com/show/7364/memory-scaling-on-haswell

You don't really have to benchmark with games etc;; you can easily test with stuff like maxxmem or adia. It takes literally like 20 seconds - you can see copy, read, write speeds and latency
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post #3549 of 3650
Quote:
Originally Posted by Cyro999 View Post

You don't really have to benchmark with games etc;; you can easily test with stuff like maxxmem or adia. It takes literally like 20 seconds - you can see copy, read, write speeds and latency

True, but you have no idea how that translates to game performance. You will see bigger benchmark numbers, but if the difference is 0.2FPS then it's not really worth the money (unless benchmarking is your thing, of course). Even that Anand test shows that the difference between the fastest and slowest was only a couple of percent, and in many cases only 1 or 2%. Anything in the middle (1866 CAS 9 or so) was virtually indistinguishable in any practical test (except WinRAR).
Edited by Forceman - 2/23/14 at 11:46pm
post #3550 of 3650
Yea, but you can see for example:

If one option gives more bandwidth but higher latency - or if one option is simply flat out better than the other in every way.

You can equate that to if a given task likes bandwidth, latency or both, in simple generalizing terms
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