Who's running core i7 o/c w/12GB RAM?

[Maverick1dj]

Olla guys n girls,

Of late my PC is using far too much of my RAM about +80% (must be all the crap i have open/running all the time) so seen as DDR3 is pretty much dirt cheap I want to shove another 6GB in... but before i do i think it'll be wise to know if my overclock can handle it, I'd rather not lose CPU frequency if poss...

Currently I'm running;

Core i7 920 D0 @ 3.8GHz + HT

G.Skill Pi DDR3 6GB @ 1600MHz CL8.8.8.21.1T.

fully stable Prime95/IntelBurnTest/SuperPI...etc.

I wanna be able to shove another 6GB 1600MHz CL8 set in, anyone running close to that spec?

 

[mayhem]

the more sticks of ram you put in the more the MB has to deal with the less of a over clock you can do ...

Over clocking 3 sticks is better than over clocking 6 sticks.

 

[Maverick1dj]

the more sticks of ram you put in the more the MB has to deal with the less of a over clock you can do ...

Over clocking 3 sticks is better than over clocking 6 sticks.

That's a given, thanks but i need real results not schooling, just because i put extra strain on the system doesn't mean to say i will not achieve the same o/c, i have head room too.

There's gotta be one kit junkie on this site running 12GB?

 

[monkey7]

Your motherboard can probably handle it, but there is no way to tell even if there was someone with exactly the same kit. All gear is different, only way to find out is try.

Again, considering you're at 3.8gHz on a d0 the motherboard can probably handle it just fine.

 

[mayhem]

not schooling you . you'll get the same answer off every one

but thats oky ...

 

[PeterStoba]

W3bbo did a round up on the affects of 3/6/12GB of RAM, not sure if there was anything about overclocking but he might know how/if it affected anything.

 

[JN]

W3bbo did a round up on the affects of 3/6/12GB of RAM, not sure if there was anything about overclocking but he might know how/if it affected anything.

He did indeed. This might help:

http://www.overclock3d.net/reviews.php?/memory/3gb_6gb_or_12gb_investigated/1

One of the OC3D servers actually runs on a Core i7 965 with 12GB of RAM. The max stable OC I could get from that was 3.6GHz. Not sure how much that was to do with the memory though - but w3bbo did manage to get the same chip + board to 3.8ghz with a different 6gb mem kit IIRC.

 

[Maverick1dj]

not schooling you . you'll get the same answer off every one

but thats oky ...

Sorry dude never meant to sound *****y was just after some tangible info from someone running 12GB with overclock, didn't wanna slap out £100 for nothing if it'll completely kill my overclock.

He did indeed. This might help:

http://www.overclock3d.net/reviews.php?/memory/3gb_6gb_or_12gb_investigated/1

One of the OC3D servers actually runs on a Core i7 965 with 12GB of RAM. The max stable OC I could get from that was 3.6GHz. Not sure how much that was to do with the memory though - but w3bbo did manage to get the same chip + board to 3.8ghz with a different 6gb mem kit IIRC.

Cheers Jim much appreciated, I'll read up on the article. Thinking I'm gonna have to choose some good sticks was eying up the Corsair CL7 1600MHz... at those latencies i think I'm asking for trouble... lol

 

[SkinToxicated]

I have 12Gb of Corsair in my P6T deluxe Mobo, its 1333Mhz 9-9-9-24 . I could have got 6Mb @ 1800mhz for the same dough, but i was advised it would be better to have 12 "lanes of motorway" run at a good speed rather than 6 lanes at a fast speed.

I have overclocked my 920 to 4ghz (CPU voltage increased to 1.475v, everything else is at AUTO). As i have mentioned, it hasnt got on OS so i dont know how its gonna stand up to testing yet

 

[Maverick1dj]

I have 12Gb of Corsair in my P6T deluxe Mobo, its 1333Mhz 9-9-9-24 . I could have got 6Mb @ 1800mhz for the same dough, but i was advised it would be better to have 12 "lanes of motorway" run at a good speed rather than 6 lanes at a fast speed.

I have overclocked my 920 to 4ghz (CPU voltage increased to 1.475v, everything else is at AUTO). As i have mentioned, it hasnt got on OS so i dont know how its gonna stand up to testing yet

Interesting...

Don't spose you able to do benchies of current 12GB+timings then 6GB @ higher frq's & tighter timings? If your RAM can handle it of course.

I'm really undecided to either get 12GB rock bottom CL/FRQ, or go for a faster set????

Be a shame to pay out for the expensive ram when i could have just bought the slowest in the first place

 

[SkinToxicated]

i will certainly do some tests when my OS is in. I dont really fancy taking RAM in and out. i am pretty new to all this, so please excuse my noob attitude ATM.

can you/is it safe overclock RAM? i know you have different option in BIOS but i havent really looked into you it yet. i am just dipping my toe in the "overclocking ocean" with my CPU, that how green i am to all this

 

[Maverick1dj]

can you/is it safe overclock RAM? i know you have different option in BIOS but i havent really looked into you it yet. i am just dipping my toe in the "overclocking ocean" with my CPU, that how green i am to all this

100% never go over 1.65v for your memory voltage!!!

Apart from that you should be able to squeeze a bit more out of the ram I'm assuming it's running at a lower voltage than 1.65v judging from the memory spec, tho it's just a guess.

Even your current memory results with 12GB would suffice tbh, i can just use my current set up for the 6GB test, if/when you do it;

1) Post the results up (read/write/copy speeds + latency).

2) What program you used (Everest is good).

3) What your system spec was (CPU speed/QPI/Memory settings/OS...etc).

Then I'll bench with my current system w/6GB @ your speeds and my current.

Reckon all that info should clarify the 12GB situation.

 

[SkinToxicated]

100% never go over 1.65v for your memory voltage!!!

Apart from that you should be able to squeeze a bit more out of the ram I'm assuming it's running at a lower voltage than 1.65v judging from the memory spec, tho it's just a guess.

Even your current memory results with 12GB would suffice tbh, i can just use my current set up for the 6GB test, if/when you do it;

1) Post the results up (read/write/copy speeds + latency).

2) What program you used (Everest is good).

3) What your system spec was (CPU speed/QPI/Memory settings/OS...etc).

Then I'll bench with my current system w/6GB @ your speeds and my current.

Reckon all that info should clarify the 12GB situation.

Will do,it might not be till then end of next month though as i havent got an OS in it yet.

So in bios you just go into the DRam fequency menu, and choose from the list?

can you link me some places that do good benches (or that will give you the results you are interested in)? or if there are already links in other threads here, what ever is easiest for you

Thanx again

 

[Maverick1dj]

yup, prob best to set memory timings to manual first try pushing them higher without increasing the the voltage then if it doesn't post or is unstable try upping the voltage, as long as you have headroom below 1.65v.

tbh prob best to check what kind of headroom you have already by checking the current DRAM voltage.

it would be interesting to see how low the latency & freq i7 can handle with 12GB.

tho i suspect the ram modules themselves would be an immense limiter.

 

[monkey7]

If you have already clocked your bclk to 200 overclocking the memory is going to be tough.

Multiplier can be set at 6, 8, 10, 12 and I think also 14. The auto multiplier sets it to the the value that gets closest to the stock speed.

So currently it is 8 (1600mhz / 200 bclk). If you set it to 10, your frequency suddenly leaps to 2000MHz, something your memory won't like.

The solution is playing with the balance between bclk and memory. You can for example set the cpu multiplier lower and slowly turning up the bclk, keeping the memory multiplier at 8.