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[Official] Haswell Owners Thread - Page 341

post #3401 of 3650
Ah, sorry you're right. Quick check shows i'm at 1333. I'll jump to 1600 tomorrow. It's 230am here. I'm happy with my overclock for now. Off to watch Battlestar, later boys thanks for the help
post #3402 of 3650
http://valid.canardpc.com/j8tht4

It's showing high 20s in CoreTemp and HWMonitor so i'm pretty happy with it. Ran high 70s to mid 80s in Small FFT Prime95 at the 12 hour mark so I might just be happy with this vcore. Didn't really tweak at all. I actually entered 1.250 in the Asus BIOS on my VI Formula but it reverted to 1.287xxxx so I guess that's why it runs at 1.29x. Whatever, as long as it's stable, hours of testing doesn't look too fun.
   
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post #3403 of 3650
Quote:
Originally Posted by TheHunter View Post



Bare in mind that I know very little about RAM OC, so when I see people posting I like to compare and see if I can improve my own. But I tried your settings there for tWTR, tRTP and tWCL. When I did that my Memory Latency increased from ~40.4 to what you see which is around ~41.4.

For me these are: 10, 10, 9 respectively which give that 40.3. Just for comparison even though this is Trial so some things are blocked (I have BCLK @ 100.1).



However, using the bench function I get the numbers: Read I get 36.5GB, Write I get 37.7GB and Copy 35.3GB.
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post #3404 of 3650
Quote:
Originally Posted by error-id10t View Post

Bare in mind that I know very little about RAM OC, so when I see people posting I like to compare and see if I can improve my own. But I tried your settings there for tWTR, tRTP and tWCL. When I did that my Memory Latency increased from ~40.4 to what you see which is around ~41.4.

For me these are: 10, 10, 9 respectively which give that 40.3. Just for comparison even though this is Trial so some things are blocked (I have BCLK @ 100.1).


However, using the bench function I get the numbers: Read I get 36.5GB, Write I get 37.7GB and Copy 35.3GB.

What is your ram, 2400? Edit: just saw your spec.. nvm smile.gif


I stumbled on this extra ram info and it fixed that auto timing low 25gb/s bandwidth.. I've seen quite a few around the web - even ram reviewers lol


I didnt test further, well I did a little and this is the best I could do for now



Hm thanks for extra info, I will try those, maybe it will be the same by me smile.gif


Edit: Nah it doesnt work by me, I got worse latency, read/copy stayed around the same 35.5gb/s guess it depends on ram chips.. Mine is Samsung K4B2G0846D HCH9 chip.


I managed to lower the latency a bit, I ran it a little later not right after windows start.



tRTP 9
tWTR 9
tWCL 7
tRRD 7
tFAW 28

gives me the best speeds, but I just cant break 36gb/s by read, unless its some other extra timing im missing.
Edited by TheHunter - 1/8/14 at 11:42am
post #3405 of 3650
Can someone clarify that overclocking any haswell chip forces you to lower your ram frequency down say from 1866 to 1600 or even lower. What would of been the point of buying ram at rated speeds if you cant use them. Even if they say these speeds work in lets say a non overclocked situation, shouldn't if my cpu is stable still work at rated ram speeds? I understand the memory controller is on the CPU, so if any overclocking takes place you must lower ram speed ?
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post #3406 of 3650
Quote:
Originally Posted by Jedson3614 View Post

Can someone clarify that overclocking any haswell chip forces you to lower your ram frequency down say from 1866 to 1600 or even lower. What would of been the point of buying ram at rated speeds if you cant use them. Even if they say these speeds work in lets say a non overclocked situation, shouldn't if my cpu is stable still work at rated ram speeds? I understand the memory controller is on the CPU, so if any overclocking takes place you must lower ram speed ?
For an easy experience, keeping memory speeds at DDR3-1600 (or below) while overclocking the CPU is advised. Once the processor is fully stable at the target frequency, memory frequency can be increased according to the capabilities of the IMC. Overclocking Haswell in this way makes it easier to pinpoint where any instability is coming from.
post #3407 of 3650
But that is my point, You lowered it to test stability and it passes so now you raise it and it doesn't so then your rated ram timings are not what you paid for? I would like to run my 1866 rated speeds. Wich obviously isn't able to work well with any overclocks apparently with my chip. I haven't tried lowering it yet, but discovered memtest86 plus errors last night and then tried each stick individually no errors. Tried all slots no errors. Then put he ram abck the way it way no errors, could my overclock of been the culprit. It was overclocked and then lowered so I am not sure what the hell happened. I have 42x 42x 41x 40x and vcore at 1.2, and 1.2 may of not been enough for 4.2 but anyway my Ram was showing errors in metest but second time around wasn't, so call me confused. can overclocking affect memtest results even though your testing ram? even though the ram itself is running rated values ?
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post #3408 of 3650
Quote:
Originally Posted by Jedson3614 View Post

But that is my point, You lowered it to test stability and it passes so now you raise it and it doesn't so then your rated ram timings are not what you paid for? I would like to run my 1866 rated speeds. Wich obviously isn't able to work well with any overclocks apparently with my chip. I haven't tried lowering it yet, but discovered memtest86 plus errors last night and then tried each stick individually no errors. Tried all slots no errors. Then put he ram abck the way it way no errors, could my overclock of been the culprit. It was overclocked and then lowered so I am not sure what the hell happened. I have 42x 42x 41x 40x and vcore at 1.2, and 1.2 may of not been enough for 4.2 but anyway my Ram was showing errors in metest but second time around wasn't, so call me confused. can overclocking affect memtest results even though your testing ram? even though the ram itself is running rated values ?

First thing I do with a fresh new build is to test each component separately. Set everything back to default and run memtest. Does it pass then?
post #3409 of 3650
I would guess yes because I downed my overclock but didn't set everything back to stock. That is what I need to do but am trying to figure out. What I dont get it how can I get errors on memtest but on another round of checking not. The only two links I see are these strange modes you chose from which is failsafe which uses one core but why does this matter if your testing ram, is it because the IMC is on the CPU? The other being multi threaded which is what i ran the first time it failed, I then tried Failsafe and no errors. The difference between cores is what lead me to think maybe my overclock? But i'm testing my ram at rated values?
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post #3410 of 3650
It could definitely be your overclock or that your overclock isn't stable. To make things easier, try running memtest with defaults first and we'll go from there.
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