quick bit of advice

paradisiac

paradisiac

paradisiac

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ok, this is kind of mobo, cpu, ram and overclocking related, so rather than posting in all 4 sections, or posting in the wrong one i will make it a general question.
basically fitted 2x4GB DDR3 1333MHz ram to my system. post and works fine, but its running slower that my 2x2GB DDR3 1333MHz ram was. when i look on cpu-z it says my cpu:ram is 2:1 (or 1:2 cant remember) and that the voltage for the ram should be 1.50v. in the bios its set to auto (1.65v) but if i try to change it to 1.5v the machine wont post.
my cpu is overclocked to 3.6GHz (by upping the fsb to 240) and thats all. so :
1. is there any way to change the cpu:ram ratio or is that mobo dependant?
2. why would my ram run slower (have only used WEI so i know its not accurate but as a whole the pc feels slower)?
3. why wont my system boot with the rams recommended voltage?
 
1) You'll normally have the option to change the RAM ratio in the BIOS
2) Not sure, what speed does CPU-Z say the RAM is running at? (you've said 1:2 ratio but haven't said the actual speed)
3) Not sure again, although it's not uncommon for RAM to refuse to run at their rated speed/voltage, it's a valid reason for sending the RAM back if you're not happy if it won't run at 1.5V at the rated speed.
 
Redmint said:
1) You'll normally have the option to change the RAM ratio in the BIOS
2) Not sure, what speed does CPU-Z say the RAM is running at? (you've said 1:2 ratio but haven't said the actual speed)
3) Not sure again, although it's not uncommon for RAM to refuse to run at their rated speed/voltage, it's a valid reason for sending the RAM back if you're not happy if it won't run at 1.5V at the rated speed.
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1. i couldnt see anything :(
2. 480MHz
3. that good then :) just a shame the system feels soo slooow :(
 
1. The RAM speed will always be a product of the bus speed but you can change it's ratio by selecting the correct "DRAM Frequency" in the BIOS nearest to 1333MHz
2. It should run slower unless the DRAM frequency is considerably slower. Try one stick at a time in different banks. If one stick is slow than the other you could have a faulty module. Run memtest86+ on each to verify
3. Which make of RAM is this.. Please post link to manufacturers website.. afaik, 1.65v should be fine anyway.

I have a full DDR3 guide here
http://www.huddysworld.co.uk/index....-ddr3&catid=40:techie-talk-hardware&Itemid=72

edit - was typing this before first reply :p
 
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The RAM speed has a very small impact on performance. With 240MHz FSB and 2:1 ratio your RAM will be running at 960MHz (DDR doubles the actual frequency) so it is underclocked, but it shouldn't be enough to drastically slow your system down.

If you want to run it faster, you need to either increase the FSB further, which will speed everything on the motherboard up, or try a different memory divider in bios.

If it won't post at 1.5v run it at 1.65. That shouldn't be a problem.
 
Admiral Huddy said:
1. The RAM speed will always be a product of the bus speed but you can change it's ratio by selecting the correct "DRAM Frequency" in the BIOS nearest to 1333MHz
2. It should run slower unless the DRAM frequency is considerably slower. Try one stick at a time in different banks. If one stick is slow than the other you could have a faulty module. Run memtest86+ on each to verify
3. Which make make of RAM is this.. Please post link to manufacturers website.. afaik, 1.65v should be fine anyway.

I have a full DDR3 guide here
http://www.huddysworld.co.uk/index....-ddr3&catid=40:techie-talk-hardware&Itemid=72

edit - was typing this before first reply :p
Click to expand...

1. i had to set it to the second closest to it as the closest wouldnt post :(
2. memtest has been run for 16hours without error :(
3. my ram
 
Blue160 said:
The RAM speed has a very small impact on performance. With 240MHz FSB and 2:1 ratio your RAM will be running at 960MHz (DDR doubles the actual frequency) so it is underclocked, but it shouldn't be enough to drastically slow your system down.

If you want to run it faster, you need to either increase the FSB further, which will speed everything on the motherboard up, or try a different memory divider in bios.

If it won't post at 1.5v run it at 1.65. That shouldn't be a problem.
Click to expand...

cant up the fsb, its as high as i can go before it wont post :(
 
In that case you'll have to live with your RAM speed or lower your overclock until a higher memory divider works.
 
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Blue160 said:
In that case you'll have to live with your RAM speed or lower your overclock until a higher multiplier works.
Click to expand...

:( hopefully wont be long til i get my X6 BE, so shouldnt need to change FSB just the multiplier, so this should allow ram to stay at its default 1333MHz?
 
Sorry you quoted me before my edit! I meant memory divider not multiplier.

An unlocked multiplier would allow you greater flexibility in choosing a FSB frequency that suits your RAM though.
 
i can lower the multiplier, just not go over the 15x, so would lowering it and then going for a higher fsb be doable, or is that less stable than high multiplier low fsb?
 
ok kool, might have to wait til weekend to play with it. failing that, probs dont need 8GB so could just go back to the 4GB. is there anything that tests ram speed/performance?
 
well i managed to get 3.6GHz with both 15x240 and 14.5x250 and both seemed stable, the 14.5x250 gave me higher ram speed, so would this be the best one to go with?
 
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