memory clocks

feldoln · 01-16-2008, 02:36 PM

Hi. bought some new ram to help support my pc. Before, I only had 1 gig, which for some games just isn't enough. I decided to buy 4gb of ddr2 800mhz ram.

when i got the ram, I installed it with no problems until i realised my pc was actually a bit slower. turns out the memory is clocked at 266mhz (533mhz)
I go to my BIOS settings and see that I have to manually change it to 800mhz to get that speed. I try it and my PC just doesn't want to load windows properly. I tried a couple more times. it loaded windows once, for about 5 seconds then restarts the pc. I lower the clock rating to 667mhz and windows loads up without a problem.

my motherboard is capable of memory up to 800mhz. So i was just wondering why this might happen. does anyone know a way to fix it? If not, I'm quite happy to continue using 667mhz clock speed, but I had hoped for 800mhz.

thanks in advance for any replies :)

Mycophiles · 01-18-2008, 06:22 AM

Well. These types of things usually depend on a couple of different factors in your case. Could you tell us what type of motherboard you are using? What type of ram you bought (a link to it would be great).

In my case I bought Crucial Ballistix ddr2 6400 800 ram and I know my board will take that ram but for some reason it wont. It dials it back also... just like your board is doing. If I try to force the ram to detect at 400mhz then the computer won't even boot. In my case I think it's due to the ram voltage. The voltage for this ram is 2.2v and the voltage settings in my bios only go to 2.1v so for me that's prob. The issue.

Post up your MB and lets see if there are any known issues with ddr2 800 ram.

feldoln · 01-18-2008, 11:03 AM

Hiya. I'm quite alright to continue using the mode im currently using. But if you're willing to look into it for me, I would be appreciative to find out why it won't use 800mhz.

Unfortunately, my pc is a bit old now, and since i have very little money with a part time job, i had to build my pc with cheap parts :(
But hey, at the time, it worked well enough ^^

my motherboard is: ASROCK AM2 ALIVENF6G-VSTA

and the ram i got off ebay: link

01-16-2008, 02:36 PM	#1 (permalink)
feldoln Registered User Join Date: Jan 2008 Posts: 16 OS: XP home & Vista Ultimate x64	memory clocks Hi. bought some new ram to help support my pc. Before, I only had 1 gig, which for some games just isn't enough. I decided to buy 4gb of ddr2 800mhz ram. when i got the ram, I installed it with no problems until i realised my pc was actually a bit slower. turns out the memory is clocked at 266mhz (533mhz) I go to my BIOS settings and see that I have to manually change it to 800mhz to get that speed. I try it and my PC just doesn't want to load windows properly. I tried a couple more times. it loaded windows once, for about 5 seconds then restarts the pc. I lower the clock rating to 667mhz and windows loads up without a problem. my motherboard is capable of memory up to 800mhz. So i was just wondering why this might happen. does anyone know a way to fix it? If not, I'm quite happy to continue using 667mhz clock speed, but I had hoped for 800mhz. thanks in advance for any replies :)

01-18-2008, 06:22 AM	#2 (permalink)
Mycophiles Registered User Join Date: Jan 2008 Posts: 35 OS: Winxp	Re: memory clocks Well. These types of things usually depend on a couple of different factors in your case. Could you tell us what type of motherboard you are using? What type of ram you bought (a link to it would be great). In my case I bought Crucial Ballistix ddr2 6400 800 ram and I know my board will take that ram but for some reason it wont. It dials it back also... just like your board is doing. If I try to force the ram to detect at 400mhz then the computer won't even boot. In my case I think it's due to the ram voltage. The voltage for this ram is 2.2v and the voltage settings in my bios only go to 2.1v so for me that's prob. The issue. Post up your MB and lets see if there are any known issues with ddr2 800 ram.

01-18-2008, 11:03 AM	#3 (permalink)
feldoln Registered User Join Date: Jan 2008 Posts: 16 OS: XP home & Vista Ultimate x64	Re: memory clocks Hiya. I'm quite alright to continue using the mode im currently using. But if you're willing to look into it for me, I would be appreciative to find out why it won't use 800mhz. Unfortunately, my pc is a bit old now, and since i have very little money with a part time job, i had to build my pc with cheap parts :( But hey, at the time, it worked well enough ^^ my motherboard is: ASROCK AM2 ALIVENF6G-VSTA and the ram i got off ebay: link