i just upgrade my 4x256mb ram modules to 2x1gb high density modules that i picked up for almost nothing. The problem is i cant get the cpu to overclock anymore even with the use of dividers. For instance i cant get even 202 out of the ht without it crapping out on me, where as before i ran 300x9, 2.7ghz, rock solid stable 24/7. My mobo is an asrock dual-sata2 939. Any ideas?
Help with my 939 3800
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could be 1 of many things. concentrating on the memory for now, i presume we are talking of ddr400 (pc3200). What memory divider do you use? i know a lot of motherboards detect 2 sticks of ram at their full speed IE 200mhz but detect 4 sticks at 166mhz. If you left the mem divider untouched through all of this, you would have had a lot more headroom, to overclock, with 4 sticks (although this is a simple bios option to change.) Sorry if you know all this already.
EDIT: thinking a bit more im sure at 2.7ghz using a 166mhz divider your ram would sit at 200mhz so you could be hitting the same limit in each setup.
EDIT: thinking a bit more im sure at 2.7ghz using a 166mhz divider your ram would sit at 200mhz so you could be hitting the same limit in each setup.
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sorry just re-read what you said and you have used dividers. Which memory slots have you used? You obviously have 4 slots but often to run 1x dual channel kit you have to use slots 1 and 3 or 2 and 4. Should say in the manual or a quick google.
did you try to overclock almost as soon as you put the new memory in? just wondering if you know the memorys runs ok at normal speed. What about memory voltage? has it kept your old bios setting for other memory or just detected it wrong maybe? mine auto detects at 2.6v but only runs stable at 2.7v and my memory only runs at 200mhz
I think at this point i would reset the CMOS, run it standard for a day or 2 and then start to overclock again.
I think at this point i would reset the CMOS, run it standard for a day or 2 and then start to overclock again.
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that was the problem then, your mobo was autodetecting a lower mem divider because of having 4 sticks so you had more headroom there. If u choose a 100 divider you should be able to overclock further but without doing all the maths not sure how high you could get your RAM. might have to be a compromise between the 2 Depending what mobo you have. You can increase it in otherways. If i run 250x12 i have my memory divided to 200mhz. If i then change to 273x11 with the same divider i think my memory then runs at about 214mhz. Well, i say runs ......
