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tweaking crappy ram?

post #1 of 8
Thread Starter 
I want to push more out of this crappy ram kit (if possible) but I'm not sure on where to start and what advance memory timings to lower.

The kit won't POST anything with 8. CL 8 , tRCD 8, tRP 8 all fails even with 1.7v. I've only manage to become stable with 9-9-9-19-99-1T with 1.550v but I have no idea where to start with the advance timings and what ones to push lower.







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post #2 of 8
The second picture says it all. You are running with a 1T command rate when it is specified to run at 2T command rate. You already have it pushed about as far as it will go. You could try changing it to 2T and then tightening up the CL, and then benchmark it to see if there is any benefit to those settings. I doubt it will get much better than what you have it at now though.
post #3 of 8
Thread Starter 
Quote:
Originally Posted by Kleer Kut View Post

The second picture says it all. You are running with a 1T command rate when it is specified to run at 2T command rate. You already have it pushed about as far as it will go. You could try changing it to 2T and then tightening up the CL, and then benchmark it to see if there is any benefit to those settings. I doubt it will get much better than what you have it at now though.

You may be right. I applied 2T with 8 CAS @ 1.7v and same result. FAIL POST. I guess the only upgrade here is new ram kits
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post #4 of 8
Quote:
Originally Posted by Unknownm View Post

You may be right. I applied 2T with 8 CAS @ 1.7v and same result. FAIL POST. I guess the only upgrade here is new ram kits

Have you tried overclocking the ram with looser timing? I have a set of OEM variant DDR3 PC12800 ( got it for free so I can't complain biggrin.gif ) and went from 800 @ 11-11-11-31 to 1066 10-11-12-31 24 Hour Memtest stable and at stock voltage 1.5v. Good improvement from stock timing and speed.
 
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post #5 of 8
Thread Starter 
Quote:
Originally Posted by whitesedan View Post

Quote:
Originally Posted by Unknownm View Post

You may be right. I applied 2T with 8 CAS @ 1.7v and same result. FAIL POST. I guess the only upgrade here is new ram kits

Have you tried overclocking the ram with looser timing? I have a set of OEM variant DDR3 PC12800 ( got it for free so I can't complain biggrin.gif ) and went from 800 @ 11-11-11-31 to 1066 10-11-12-31 24 Hour Memtest stable and at stock voltage 1.5v. Good improvement from stock timing and speed.



With XMP profile disable and everything set to auto and DRAM @ 1866mhz I get 11-11-11. Lowering to 10-10-10 = fail post even with higher voltage.

The only reason why I haven't push higher speed because of the chart

1600Mhz 9-9-9 = 11 (1/4) while 1866mhz 11-11-11 = 11 (11/14)

and on top of that I don't even think 1866mhz with auto timings is stable even at 1.7v which is why I started to play with 1600Mhz. What I was wondering is will messing with any of the advance timings in the BIOS give me better results?
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post #6 of 8
Quote:
Originally Posted by Unknownm View Post



With XMP profile disable and everything set to auto and DRAM @ 1866mhz I get 11-11-11. Lowering to 10-10-10 = fail post even with higher voltage.

The only reason why I haven't push higher speed because of the chart

1600Mhz 9-9-9 = 11 (1/4) while 1866mhz 11-11-11 = 11 (11/14)

and on top of that I don't even think 1866mhz with auto timings is stable even at 1.7v which is why I started to play with 1600Mhz. What I was wondering is will messing with any of the advance timings in the BIOS give me better results?

TBH, I haven't been following up with JDEC standard or have used XMP proflies, Usually I set the timing manually at rated speed from the manufacture.

When changing advancing timing, it is possible to improve but can also be negative effect. It's best to change timing 1-2 things at a time, do a quick pass on memtest and benchmark. See if there is any decrease or increase on performance.
 
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post #7 of 8
Thread Starter 
Quote:
Originally Posted by whitesedan View Post

Quote:
Originally Posted by Unknownm View Post



With XMP profile disable and everything set to auto and DRAM @ 1866mhz I get 11-11-11. Lowering to 10-10-10 = fail post even with higher voltage.

The only reason why I haven't push higher speed because of the chart

1600Mhz 9-9-9 = 11 (1/4) while 1866mhz 11-11-11 = 11 (11/14)

and on top of that I don't even think 1866mhz with auto timings is stable even at 1.7v which is why I started to play with 1600Mhz. What I was wondering is will messing with any of the advance timings in the BIOS give me better results?

TBH, I haven't been following up with JDEC standard or have used XMP proflies, Usually I set the timing manually at rated speed from the manufacture.

When changing advancing timing, it is possible to improve but can also be negative effect. It's best to change timing 1-2 things at a time, do a quick pass on memtest and benchmark. See if there is any decrease or increase on performance.

Its the stubbornness in me (Taurus). I see all these "auto" timings in my BIOS and I want to play around with them to figure out if the end result is better than everything stock. I posted here to see if I could skip ahead on the dirty work or get some advice on messing around with those "auto" advance settings.

Time to create bootable USB memtest and get couple days off from work.
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Hard DriveHard DriveHard DriveCooling
A-DATA SP900 2x ST2000DM001-1ER164 ASMedia® ASM1061 (External) swiftech h320 
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Stripped Win 10 x64 15063 SAMSUNG LS24F350 [MAIN] LG 22MP48HQ [SECONDARY] Corsair RM850w 
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Corsair Obsidian 750D Corsair Harpoon RGB Fiio E7 
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QX9300 @ 2.53Ghz *OLD* Intel Core 2 Duo P8700 Dell 076V94 (Intel Q43) Quadro FX 2700M 
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2x Samsung M471B5773CHS-CH9 Samsung 840 120GB TOSHIBA MQ01ACF032 HT-DT-ST DVD +-RW GS20N 
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post #8 of 8
The latency is a bit slower but the bandwidth (peak transfer rate in the posted chart) is higher. That's basically the deal with all desktop RAM. Usually there is a latency hit but total theoretical bandwidth increases when they come out with a new DDR. Then as they perfect the process companies start to produce faster, cheaper, and/or lower latency modules. Of course theoretical bandwidth and usable bandwidth are different numbers, and the real numbers will change depending on the system. This is where benchmarking comes in to help sort out the differences.

Try a few benchmarks (I would specifically recommend Super Pi) at 1600 with best timings and then try again with the 1866 but looser timings and see what kind of numbers you get. I'd imagine that overclocked i5 would perform slightly better with higher bandwidth. Only one way to find out.
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