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Samsung Miracle Memory Club - Page 18

post #171 of 1055
Quote:
Originally Posted by ivanlabrie View Post

1)Vccsa is imc, vtt is vccio. Don't fiddle with those for reassurance...the imc is not as strong as Ivy but still really good.
2)Auto subs is using automatic secondary timings in your bios. Use cl8-10-8-28-1t at 2133mhz, see how that goes with 1.7v
3)Yep, those older ic's can take up to 1.75v for daily usage, though 1.7v is 'safer'. Just have a fan blow air at them...

Ok thanks. I'll see what I can do. How about for Vcore voltage? I'm actually running a stability test right now with HCI Design Memtest software at the same 2133 9-11-9-27-2t settings but I took the liberty to raise Vcore to 1.4V 4.5GHz. I know 1.4V is too high but I just want to eliminate Vcore out of the equation, for now. I'm at 127% coverage without any errors now and still continuing. Is this testing method fine?

When you say not fiddle with VCCSA and VCCIO, that means leave them at Auto?
post #172 of 1055
Quote:
Originally Posted by kevindd992002 View Post

Ok thanks. I'll see what I can do. How about for Vcore voltage? I'm actually running a stability test right now with HCI Design Memtest software at the same 2133 9-11-9-27-2t settings but I took the liberty to raise Vcore to 1.4V 4.5GHz. I know 1.4V is too high but I just want to eliminate Vcore out of the equation, for now. I'm at 127% coverage without any errors now and still continuing. Is this testing method fine?

When you say not fiddle with VCCSA and VCCIO, that means leave them at Auto?

Yeah, try auto first...if that fails with 1.4v vcore you might need a bit more vccsa and vccio. Check SB guides cause I don't recall the safe voltages really.
post #173 of 1055
I'll add mine to this list when I get home from work.

Currently have it at 2000mhz 9-10-9-24-1t @ 1.425v. If I try to set it to 2133, my PC won't even boot, even if I jack in 1.475v. I haven't tried going past there yet.
/hwaw
(20 items)
 
  
CPUMotherboardGraphicsGraphics
Intel Core i7 3770k @ 4.3ghz 1.160v ASRock Z77 Extreme6 Gigabyte R9 290 Windforce Sapphire R9 290 
RAMHard DriveHard DriveHard Drive
2x4gb Samsung RAM @ 2000mhz 9-10-9-28 1.425v OCZ Vertex 4 Hitacho Deskstar Crucial M550 
CoolingCoolingCoolingOS
Corsair H80 (CPU) Thermalright Spitfire (GPU) Gelid Icy Vision (GPU) Windows 7 Ultimate 64-bit 
MonitorMonitorKeyboardPower
BENQ GW2450 Asus PB278Q Cooler Master Quickfire Rapid Seasonic 750w  
CaseMouseMouse Pad
Black Interior HAF 932 Roccat Kone  Artisan Hien Hard 
  hide details  
Reply
/hwaw
(20 items)
 
  
CPUMotherboardGraphicsGraphics
Intel Core i7 3770k @ 4.3ghz 1.160v ASRock Z77 Extreme6 Gigabyte R9 290 Windforce Sapphire R9 290 
RAMHard DriveHard DriveHard Drive
2x4gb Samsung RAM @ 2000mhz 9-10-9-28 1.425v OCZ Vertex 4 Hitacho Deskstar Crucial M550 
CoolingCoolingCoolingOS
Corsair H80 (CPU) Thermalright Spitfire (GPU) Gelid Icy Vision (GPU) Windows 7 Ultimate 64-bit 
MonitorMonitorKeyboardPower
BENQ GW2450 Asus PB278Q Cooler Master Quickfire Rapid Seasonic 750w  
CaseMouseMouse Pad
Black Interior HAF 932 Roccat Kone  Artisan Hien Hard 
  hide details  
Reply
post #174 of 1055
Don't be afraid to do so...Samsung only undervolts them cause they can run those clocks with such low voltage. That's all really. thumb.gif
This same ic's come in 1.65v rated ram running much higher clocks.

EDIT: In fact the ram has two profiles you can see in cpu-z and your bios. One of them has 1.5v as rated vdimm for boards that don't support less than that. They can run those volts no prob...
Edited by ivanlabrie - 1/17/13 at 4:58pm
post #175 of 1055
Hmmm, now no matter what I do I can't get the sticks to boot even at 2200 11-13-13-35 1.65v. when before I had em at 2400 10-12-12-30 1.55v. This is strange or my sticks are already dying frown.gif
post #176 of 1055
Perhaps something degraded there...what imc/vccsa and vtt/vccio volts where you running? I think I degraded my imc in my previous 3770k and had a similar thing with my greens. (running a z77x-ud5h btw...those GB boards kinda suck for clocking these sticks)

Do you still got that fx8120 of yours? they clock ram great in general, better than Ivy but with slower bandwidth cause of the limited cpu nb speed and lousy memory controller. Try the sticks in that rig to see if they degraded.
post #177 of 1055
I returned the 8120 for the 3770K+Mobo and greens. I was running everything on auto except for the ram voltage and speed/timings. Aw this sucks :c
post #178 of 1055
Quote:
Originally Posted by Zeek View Post

I returned the 8120 for the 3770K+Mobo and greens. I was running everything on auto except for the ram voltage and speed/timings. Aw this sucks :c

Rather odd...Sub timings sometimes make things complicated. Let me get ya some sample timings to try out.

EDIT: Try these timings...

You're gonna need at least 1.7v for 2400mhz, try 1.75v and see if it posts.
Use 1.2v for both vccio and vccsa btw and see if you can change the ram voltage switching frequency (vrm setting, not sure how it's called or if your bios has it). Select manual and try higher than the default 300 value, something like 320-400
This is also a very good read. thumb.gif
Edited by ivanlabrie - 1/17/13 at 5:37pm
post #179 of 1055
Quote:
Originally Posted by ivanlabrie View Post

Rather odd...Sub timings sometimes make things complicated. Let me get ya some sample timings to try out.
I'd appreciate that.

Oh and the voltage shouldn't have degraded em I think.

DRAM V: 1.5v I changed that all around tho
VTT V: 1.076
PCH V: 1.059
CPU PLL V: 1.832 I lowered that as much as possible. Don't remember what I'm running but it's low lol
VCCSA V: .925
post #180 of 1055
Quote:
Originally Posted by ivanlabrie View Post

Yeah, try auto first...if that fails with 1.4v vcore you might need a bit more vccsa and vccio. Check SB guides cause I don't recall the safe voltages really.

Ok, I'll give it a try but usually should Vcore set to Auto enough for overclocking RAM?

I had a false alarm, my current HCI Design Memtest failed even at 1.4 Vcore, 1.65V Vdimm, and 1.2 VCCIO.

I did read about safe voltages and they say that 1.65V Vdimm is the safe for 24/7 use?
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