PC powers on then off and then starts normally on "cold" booted when DRAM frequency is set to 1333 MHz

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shothex

shothex

Honorable
Apr 18, 2015
8
0
10,510
Hello,

Motherboard: Asus P5G41T-M LX2/GB/SI Intel G41+ICH7 / 1333FSB / DDR3 (Dual Channel).
CPU: Intel® Core™2 Quad Processor Q9300 (6M Cache, 2.50 GHz, 1333 MHz FSB).
RAM: Crucial 2GBx2 DDR3-1333, 1.5V.

As written above all three CPU, RAM and Motherboard supports frequency 1333 MHz. By default in BIOS settings DRAM frequency is configured on auto mode and the frequency automatically is set to 1066 MHz, on this configuration on "cold" booted computer starts normally, but when i manually set frequency to 1333 MHz on "cold" booted happens next, computer powers on about 2 sec then powers off and then boots normally with a DRAM frequency 1333 MHz. Any ideas what can be a problem when frequency is set to 1333 MHz.
 
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shothex

shothex

Honorable
Apr 18, 2015
8
0
10,510

Thank you for responding, i didn't adjusted timing/voltage, now i checked settings and there is "Configure DRAM Timing by SPD" which is enabled by default and if i disable it then appears some options like tCL, tRAS etc. but i can't change any of this options. Also there is not setting to manipulate voltage.

2aircr4.png

97nrti.png


Now i changed Freq. to 1333 and disabled "Timing by SPD " and Timing parameters automatically was set to new values.
2aeqc10.jpg


computer booted with new configuration
4u9sw4.png

but result is same when i release computer from electricity (unplugging power cord from PSU about 2 sec) and turning PC on, happens same (computer powers on then off and then boots normally).

 
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1LiquidPC

1LiquidPC

Splendid
Oct 11, 2014
5,314
83
31,590
Your info seem to be pretty "normal", and 1.5V is the stock voltage for DDR3. Timings are being adjusted automatically as well as shown in your screenshots. Your voltage is the same for both settings, which looks right as well from your CPU-Z screenshot. However, I'm at a loss as why it does it every "cold" boot. I've only seen this behavior on some ASUS boards I've had/used that were disconnected from utility power. This would only occur the first cold boot, but subsequent cold boots would boot normally, no off-on double boot that your getting. I believe ASUS used to call this a "feature" for OC settings and possible Anti-Surge, but not sure on that one. This *may* be the cause as from a quick glance at ASUS' website, 1333 DRAM speed is considered an OC for this board. Your CPU is a generation before the integrated memory controllers in the CPU itself, so it's still in the northbridge of your motherboard. So, when your setting to 1333, your actually overclocking your memory controller some, as it only "officially" supports speeds up to 1066.
 
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shothex

shothex

Honorable
Apr 18, 2015
8
0
10,510

Will it be safe to left on 1333 or change config back to auto mode ?
 
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1LiquidPC

1LiquidPC

Splendid
Oct 11, 2014
5,314
83
31,590
I'd probably leave it at 1333 if it were me, if you can deal w/ the cold boot power off/on. However, it *may* over time cause problems w/ your motherboard as it is overclocking the memory controller a bit. Depends on really how long you intend on using your current motherboard/CPU combo. If you want it to run as long as possible, you may want to play it safe and stick with auto/1066. If your going to upgrade in the new few years, I'd run at 1333.
 
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