***Asus Rampage III Extreme Owners Thread***

[CryptiK]

Hey don,

My VTT is 1.41 at the moment, i'll try increasing it and dropping my Vcore later on ... will let u know

Do try playing with PLL too. For an easier point of comparison and so we can get an idea of scaling, what does you CPU need for 4GHz LinX/Prime small FFT etc and 4.2 or 4.3GHz LinX/Prime small FFT?

Hi guys!

I just got a 990x last week and trying hard to find a 24/7 OC for it.
What do you think is the max vcore for 24/7, if i only use it for gaming? Im watercooled with the Swiftech h20-320 kit, and NB waterblock also from swiftech. Currently im stuck at 4.5ghz, 1.39 vcore in bios, in cpu-z it reads 1.376 in idle and from 1.343 to 1.349 in load under prime95, cpu pll at 1.31v, all that with LLC at 50%. I have the rampage III extreme board, of course. I would like to use it in the primary rig for at least 3 years, so I would like to find a sweetspot between safe vcore and performance, something that can give it a run for the money but not devastate it (i know will probably sound stupid to you guys, sorry). Batch nuber of cpu is 3045A709 . Im a little dissapointed with this CPU, i thought according to info on the web prior to the release, I could have a higher 24/7.

Thanks guys, please give me some advice!

This is like asking how long is a piece of string. No one's going to be able to tell you with any semblance of accuracy how much these things can take 24/7 for the arbitrary time period of 3 years without degradation.

Around 1.36v would be my personal limit, but I'm conservative with 24/7 PC's. When I bench I do it on bench only gear and on DICE and LN2 so my work/gaming PC has to be stable and I go for a balance between performance, heat production and reliability. I'm running my 990X daily at 4GHz @ 1.184v / 3600MHz uncore @ 1.244v / DDR3-1600 6-6-6-18 @ 1.55v because with that configuration I'm pulling ~78-79GFLOPS in LinX and ~17GB/s bandwidth and all at low voltages. FPS are still great with my card in the games I play and encoding/rendering/batch photo conversion is faster than my bloomfield was at 4.33GHz.

Since I can't seem to increase my core clock or bclk at all past 200, I decided to tune Uncore freq.
4.2GHz @ 82.9GFlops:

x18 up from x15! I had to increase vQPI from 1.3375 to 1.3500.
It creates a nice look with QPI and Uncore synchronized.

I think I might not have enough cooling to go faster, since I top out at 84C with Linx at 4.2GHz. Although, I feel like I have a lot more performance at 4.2 than many have at 4.5! I see many 4.5GHz club members with less GFlops.
Right now I have 3x 120mm rads. Two GTX 120's and one GTS 120. One GTX has push/pull. One GTX can only have push because of its location. The GTS only has pull on it now, but I was thinking I should add another fan for push/pull there. It will take some very careful alignment and I have to swap my barbs back to straight from the nice rotary 45's:
http://s144.photobucket.com/albums/r...t=2e6b80b7.jpg
http://i144.photobucket.com/albums/r...h_2e6b80b7.jpg
http://s144.photobucket.com/albums/r...t=85256708.jpg
http://i144.photobucket.com/albums/r...h_85256708.jpg

Nice, I run ~3600MHz too. I see a lot of GT users leave this at <3000MHz and I wondered why since it has a large impact on performance. It's the speed of the L3 cache as well as IMC and so is critical in tuning overall performance.

Thanks! I was thinking that since 4.5GHz is kinda of a big feat I should loosen ram timings to 8-8-8-24. I saw some other users running up to 1720 at CL6 on the same kit I have so I just went for it. It was a combination of strong memory, cpu and imc, and mobo.

I love memory overclocking so I'm very tempted to tighten TRFC and make some other tweaks. But for now I want this feeling to last lol

Yeah 4.5GHz was awesome to hit for the first time. I also rather enjoy ram overclocking and getting it tuned for good bandwidth and low latency can have a great impact on performance and how the PC feels to use. These kits will do 1700-1720 CL6 on 1.65v with tRFC ~60 (maybe have to use 72 depending on your kit) and tight subs, so have a go when you get the chance. I will play with mine a bit now I have a different CPU and board to learn.

haha i know i mistyped there yes, 4v, i use compressed super LN2 and turned my 980 into a super conductor and power it with a nuclear reactor.



i already loaded 0003 actually. at the moment i've only been trying to get 4.5 stable again with it, i haven't done much mem tweaking yet. but so far i lowered my rTL's to 60, 61 and 62 down from 58, 58 and 60 (stock) but that's about it.

Ah they're your RTL's, tRL is different In BIOS 0003 just below the RTL values are the tRL values.

well i'm sure my system just doesn't like going over 1866 on mem. i think it's specifically mem related as my dominators are of those non hyper chips (can't remember off the top of my head, they are the one's that don't like going with even numbers on the cl's, it's gotta be 8-9-8 or 7-9-7 and so on.) no big deal really, not much of a different between 1866 and 2000. i've increased rTL's as far at 74, 75 and 76 with +5 down the board and still can't get through full windows boot without crashing so... ohwell.

i'm thinking of trying 1800 and going for 6-8-6-24-72 2T though or 8-9-8-24-72 1T... either way i'ma go for the faster latency / response.

Elpida BBSE IC's. I have a GSkill kit with them, they are still very good. Some Hyper clocks better with staggered timings too.

RTL = round trip latency

tRL = read latency

Raju noted that this board can set tRL too tight sometimes, which is probably why we now have BIOS 0003 with that setting so we can offset it. tRL has a large bearing on dropping sticks when overclocking.