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02-19-2013, 08:52 AM
(This post was last modified: 02-19-2013, 09:08 AM by mrguen.)
Here are the steps I took in order to overclock my acer M1610 /1.8Ghz and avoid a crash.
Since the motherboard specs only considers 400/533/667 Mhz DRAM frequency, I didn't use the 800 Mhz option available with the BIOS mods. Instead I used PC6400 RAM (800 Mhz) with a decreased CAS latency (5-->4). Here is what I did
* Plug my computer into a protected plug against high voltage, since I suspect the broke down of my machine may have been triggered by AC poor quality (we have nuclear AC here).
* changed the 500W power supply of the PC for a high-end 460W power supply.
* kept DRAM frequency at 667 Mhz, but used PC6400 5-5-5 (800 Mhz RAM) and forced the BIOS to use CAS 4 instead of CAS 5 or auto mode.
* according to an internet site I disabled CE1 function and spread spectrum in the BIOS.
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BIOS setup:
Advanced bios features / CPU features / CE1 function: auto -> disabled
Advanced bios features / DRAM clock/Timing Control/ Frequency : 667Mhz -> unchanged
Advanced bios features / DRAM clock/Timing Control/ DDR2 CAS latency : auto (5T) -> 4T
PC Health status / CPU Warning Temp: 70°c -> 60°c
PC Health status / CPU Shutdown Temp: 90°c -> 80°c
PC Health status / SYS Shutdown Temp: 70°c -> 65°c
Frequency Voltage Control / Spread spectrum: enabled -> disabled
Frequency Voltage Control / CPU Host/PCIEX/PCI: 200/100/33 -> 266/100/33
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The benchmarks are now
2.4 Ghz (266/100/33) 2Go PC6400@667-CAS4 C: 3261 R: 3982 W: 4123 L: 118,8 ns
Perf CPU Free Banchmark: 28,4 s.
This configuration brings a perf increase of about 36% (memory copy) as compared to the original configuration and I hope it is safe. It is even better than when using PC6400@800-CAS5 !
I did a 8 hours stress test Ok. Temp monitoring shows a peak temp of about 57°c. Average temp around 50°c. It is borderline. The computer is running ok since a month.