667MHz ram running at 399MHz only

Hemrajsinh Gharia · Feb 15, 2015

I don't have much understanding about computer hardware. I installed PC3 10600 667MHz ram. But in CPU-Z it shows only 339 MHz.

Please suggest what should I do to run my ram at maximum 667MHz ?

rolli59 · Feb 15, 2015

CPU-Z reads actual speed which is correct half of advertised speed which is effective 667 because of Dual Data Rate. 339 means your ram is running at 678MHz.

Pinhedd · Feb 15, 2015

rolli59 :

um, what?

PC3-10600 = DDR3-1333 = 667Mhz

PC3-6400 = DDR3-800 = 400Mhz

@OP: Please post a screenshot of CPU-Z.

Hemrajsinh Gharia · Feb 15, 2015

Pinhedd :

Thanks for reply. Please see the screenshots of CPU-Z. As My Ram is PC3-10600, it should run at 667MHz.

rolli59 · Feb 15, 2015

Set your Memory speed in BIOS to 1333! If supported.

Pinhedd · Feb 15, 2015

Hemrajsinh Gharia :

Okay, I see the problem here. Your chipset doesn't natively support DDR3-1333. I can't figure out what chipset your motherboard uses but an educated guess would be either an Intel GL40 or Intel GS40 as these chipsets support only DDR3-667 and DDR3-800. You may be able to manually configure a higher data rate in the Advanced tab of the BIOS setup, but it may not be stable.

Hemrajsinh Gharia · Feb 15, 2015

Pinhedd :

Hemrajsinh Gharia :

Okay, I see the problem here. Your chipset doesn't natively support DDR3-1333. I can't figure out what chipset your motherboard uses but an educated guess would be either an Intel GL40 or Intel GS40 as these chipsets support only DDR3-667 and DDR3-800. You may be able to manually configure a higher data rate in the Advanced tab of the BIOS setup, but it may not be stable.

In Advanced tab of BIOS there is no option to change ram speed. Please see the image below.

Is there any other way to change the RAM speed ?

Pinhedd · Feb 15, 2015

Hemrajsinh Gharia :

Pinhedd :

In Advanced tab of BIOS there is no option to change ram speed. Please see the image below.

Is there any other way to change the RAM speed ?

If it's not changeable anywhere in the BIOS setup then I'm afraid that it may not be possible to change it at all.

I did see that the latest version for that laptop is A06. You have revision A04 installed, so you may wish to install A06. It's unlikely to help, but it should be done anyway.

rolli59 · Feb 15, 2015

If you can not do it in BIOS then it is not possible! Have you clicked tried selecting it there and hit enter?

Hemrajsinh Gharia · Feb 15, 2015

Pinhedd :

Hemrajsinh Gharia :

If it's not changeable anywhere in the BIOS setup then I'm afraid that it may not be possible to change it at all.

I did see that the latest version for that laptop is A06. You have revision A04 installed, so you may wish to install A06. It's unlikely to help, but it should be done anyway.

Thanks for help. I updated BIOS with A06 version. But result is same. I guess may not be able to change the RAM speed. I have to live with 399MHz

Pinhedd · Feb 15, 2015

Hemrajsinh Gharia :

Pinhedd :

Hemrajsinh Gharia :

If it's not changeable anywhere in the BIOS setup then I'm afraid that it may not be possible to change it at all.

I did see that the latest version for that laptop is A06. You have revision A04 installed, so you may wish to install A06. It's unlikely to help, but it should be done anyway.

Thanks for help. I updated BIOS with A06 version. But result is same. I guess may not be able to change the RAM speed. I have to live with 399MHz

You're most welcome. If it's any consolation, the difference would have been rather negligible.

Hemrajsinh Gharia · Feb 16, 2015

rolli59 :

Yes I tried. But it is not clickable.

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