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got my 920 to 4, now memory question

post #1 of 5
Thread Starter 
Alright so my 920 is at 4.0 now. Basically for about 2 months I've had it stable at 3.8 but I've been bored so I want to play around with it a little more. So I have it at 21x190 but now I don't know how to get my memory to run properly.

My memory is Corsair XMS3 DDR3 1600. At 3.8 I got my memory to run right (I think) because the bclk was 200 an easy number. Basically I really have no idea what to do and atm I have all the mem stuff set to auto other than voltage (1.64). My motherboard is an Asus P6T..If someone is willing to help I would need really specific instructions, for example I read that the memory multiplier should be 6 or 8 but I have no idea what thats actually called in the bios... heres a screen of my current CPU-Z



also I read something about the command rate being 1N on an asus? anything on this?

Thanks in advance to anyone that can help me out.
Red Deman
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i7 920 @ 3.8 Asus P6T SE HD 5850 XFX Black Edition 6gb Corsair XMS3 DDR3 1600 
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Red Deman
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1TB WD Caviar Black Windows 7 Home Premium 64 bit Asus VW246H G15 
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post #2 of 5
The base clock (bclk) is the clock that everything else in your system derives its own speed from, by using its own multiplier. Examples: CPU: 200x20=4000mhz. RAM: 200x8=1600mhz. VTT/Uncore: 200x16=3200mhz.

In your case, your bclk is currently at 190, and you are using the x6 multiplier for the ram... that means you're ram is currently at 1140mhz. Using the x8 multi will put you at 1520mhz, and x10 is obviously 1900mhz.

All motherboards have different names for the ram multiplier... some use a whole number multiplier, some use "dividers" or "ratios" (like 2:6 and 2:8), and some simply compute the ram speed for you (you pick from a list).
 
Wild eyes (2015)
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Wild eyes (2015)
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post #3 of 5
I believe the P6T SE just lists speeds, in the DRAM Frequency setting. It should be on the Ai Tweaker tab, 5th option. You won't be able to run exactly 1600mhz on your ram with that bclk, so you'll either need to slightly underclock or overclock your memory.
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post #4 of 5
Thread Starter 
Thanks for your help guys. This helped me understand quite a bit actually. So I chose the one that was slightly under 1600, 1520 I believe. Going to run memtest etc. obviously. Any comments on how to adjust timing? I just changed it to 9-9-9-24 just because thats what the memory recommends but could I be doing something better?
Red Deman
(13 items)
 
  
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i7 920 @ 3.8 Asus P6T SE HD 5850 XFX Black Edition 6gb Corsair XMS3 DDR3 1600 
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1TB WD Caviar Black Windows 7 Home Premium 64 bit Asus VW246H G15 
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Corsair 650TX HAF 932 G5 
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Red Deman
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CPUMotherboardGraphicsRAM
i7 920 @ 3.8 Asus P6T SE HD 5850 XFX Black Edition 6gb Corsair XMS3 DDR3 1600 
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1TB WD Caviar Black Windows 7 Home Premium 64 bit Asus VW246H G15 
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Corsair 650TX HAF 932 G5 
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post #5 of 5
At 1520, you might be able to tighten up your timings a bit, since it is a small underclock, but you'll have to experiment with it to be sure. Alternatively, you could try a 1900mhz with 9-9-9-24 and see how they run overclocked, though you may need to loosen the timings to get them stable.

Personally, I'd rather run the memory at 1520 and shoot for lower latency than 1900 and higher, but that's up to you. You shouldn't have any problems running them at 9-9-9-24 @ 1520, though, as that's below the rated speed. If you're going to stay with 1520, I'd start out testing them at 8-8-8-24, and if they have no problem doing that, maybe even try 7-8-7-20, though I doubt they'll handle that.
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Hard DriveCoolingCoolingCooling
Samsung F4 XSPC Rasa cpu block 2x XSPC Razor 460 Black Ice GTX 360 
CoolingOSMonitorKeyboard
MCP-350 Windows 7 64bit Samsung SyncMaster SA300 23" Filco Majestouch "Otaku" Tenkeyless 
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