Incorrect ddr3 dram frequency !!!!

October 10, 2010 at 06:14:50
Specs: Windows 7
Hello guys, i am first in this forum, so i have to ask you something about my dram frequency.
-I bought a new desktop pc ASRock with these specs:

mobo: ASRock G41 Express Chipset
cpu: Intel(R) Core(TM)2 Duo E7300 2.66@GHz / L2 Cache 3mb / 1066@mhz fsb,
ram: E-DATA 2GB DDR3 10700 1333@MHz
gpu: nVidia GeForce 9600GT GDDR3 512mb (GALAXY)
hdd: 250GB Hitachi SATA 2
os: Windows 7 Home Premium 32BIT

so my question is why the speed of dram frequency it show in bios only DDR3_800@mhz, is not supposed to be dram frequency 1333@mhz ? , but anyway when i check DRAM FREQUENCY in the bios, i got two options: Automatic and Manual + two values: DDR3_400 (800) and DDR3_533(1066),so if i set manualy to DDR3_533(1066mhz) does this make any problem ? and sure voltage is about v.1.60

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October 10, 2010 at 06:22:13
I'm no expert but if it were me I'd leave it on automatic.

Goin' Fishin' (Some day)

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October 10, 2010 at 06:56:43
"is not supposed to be dram frequency 1333@mhz"

Don't confuse data rate & frequency. You seem to have it backwards. DDR3-1333 does NOT run at 1333MHz frequency, it runs at 667MHz frequency...1333MHz is the data rate.

For a Core 2 Duo (or Quad) system, the optimal CPU:DRAM frequency ratio is either 1:1 or 1:2. What that means is, if the CPU is running at 1066MHz FSB (266MHz frequency), the RAM should run at either 266MHz or 533MHz frequency. So the correct RAM setting for your system is either 266MHz DDR3_533 or 533MHz DDR3_1066. Since the 1st one isn't even an option, you should use 533MHz DDR3_1066.

"mobo: ASRock G41 Express Chipset"

It would have helped to list the exact model number. ASRock makes over a dozen board based on the G41 chipset, but the ones that support DDR3 don't support DDR3-1333 unless the system is overclocked. For instance, below is the page for the ASRock G41C-GS. Notice what it states for the memory:

"Supports DDR3 1333(OC)/1066/800 non-ECC, un-buffered memory"

FYI, OC = OverClock

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October 10, 2010 at 08:32:09
so doesn't crash the system if i set ddr3 533_1066 ?

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Related Solutions

October 10, 2010 at 09:25:57
I can't tell you if it will crash or not. I have no idea what else may be wrong. All I'm telling you is you should use "manual" & set the RAM to "533MHz DDR3_1066".

If you want to take full advantge of your RAM & run it at DDR3_1333, you're going to have to overclock the CPU.

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October 10, 2010 at 09:55:57
OK thank you i will try it :)

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October 11, 2010 at 05:38:51
sir finally i got DRAM Frequency to 533_1066@MHz without any problem, so then i overclocked cpu from 2.66@ghz fsb (266) - > 2.80@ghz fsb (280), is OK but when i try to overclock to 3.33@ghz fsb (333), with ASRock overclocking tool,desktop it freezing and i must restart my pc, because i must try to overclock with software first, to see if it overclock successfully and then i gonna overclock from the bios right? , so why i can't overclock to 333 - > 1333@MHz FSB !!!

and sorry for my english i from Macedonia.

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February 21, 2011 at 04:40:51
don't do it what they told you.. they are idiots.. there is a jumper in ASROCK mobo to change the DDRII to DDR3... find the jumper and you will get the correct frequency... next time read the manual ok?!!

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March 20, 2011 at 15:40:00
Just ignore Ariz Pogl - he clearly has no clue at all!
There's no way you can "change the DDRII to DDR3" as those are two completely different DRAM technologies, incompatible with each other (although some motherboards may support either one of both types).

If your system becomes unstable due to overclocking you may try to lower the temperature and/or increase CPU voltage... or it may simply be that you reached the limit of your hardware (CPU/mobo).
In any case, I really wouldn't recommend overclocking commodity hardware (or anything without decent PSU and cooling).
Leave the DRAM frequency at 1066Mhz and everything else at auto/default. Overclocking your mobo will likely result in premature failure.

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March 23, 2011 at 16:19:36
@tachylatus your answer is correct, i have already doing that without any problems, so thank you :)

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