Kind of a noobish question... but. What will happen if you use lower speed RAM with a processor... Like(for example) DDR333 with a A64 3000+ vs. DDR400 Will the clocks be different or will the multiplier just change to accomodate the different RAM?
your CPU speed won't change...those are two totally separate things. if you combine DDR333 with DDR400 ram, both will run at the slower 333 speed.
From my experiences it does matter... Overclocking the RAM has directly resulted in a CPU speed increase... Does the multiplier for the proc change or what?
thats the wrong way around, if you up the cpu(fsb) you increase the ram frequency. if you drop the ram frequency the cpu will still be runnig at the same frequency.
when overclocking .. you adjust your RAM speed to accomadate and enhance the FSB...relaxing the timing is the norm for upping the clock speed
Relaxing the timings does indeed help make way for the speed increase... I've been seeing it all wrong... lemme get this straight: The FSB is constant. But raising it just increases the memory speed and not the other way around? So what haqppens with DDR333... Does the effective HTT speed decrease because of the multiplier on the memory speed? Is it just coincedence that the DDR400 speed matches the FSB of the A64 or what? I'd like to clear this up. I have a grasp of overclocking and cooling... memory timings and such. And I've had a VERY successful OC on both my AMD processors(see my profile.) I'd like to understand what I'm actually affecting when I OC.
were sort of close..I'm with Nvidea Nforce4 SLI actually made by ASU.with a AMD FX 57..Sandiego..I run 2 1 gig stick in duall chanell. I think with the AMD ..is making sure Hyper transport is MAxed out in Bios..1 GIG..the CPU allowes up to 2000 Mghz but no MOBDS support it...I would never consider less than 400 Mghz sticks..the FSB with AMD is a shadowy subject...becaus of the HT...overclocking with the AMD requires a consistant latancy ..why over clock if your only 333 its defeating the whole speed chase
the Hyper transport that your chip has I think is 2000 Mghz ..your MOBRD only suports 1000. default is probably set at 800..check in bios to see...it should allow 1000. now if your set on OC..your ram speed is limeted to 333..regardless when your MOBRD is a 400 set board for maximum performance...even thow your bios will read a 200 MGHz ram speed for default its the HT that matters with AMD
I might have just had an idea. The front side bus is directly related to the processor multiplier. And is the FSB related to RAM speed too? The HTT multiplier is 5 on my processor. The RAM speed is 200MHz. 5x200 is 1000... so when you factor in DDR(dual data rate) it comes to 2000MHz. The motherboards DO support the 2000MHz FSB. It's not just aesthetics. It's one of the reasons the Athlon 64 is faster than the pentium 4. It's just stated as 1000MHZ on the boxes because of the official speed of 200MHz. But DDR is a factor. SO it's 2000MHz It's limited to 800 because the default multi is 4 but it can go to 5. At stock it is effectively 1600MHz. Which is max for the socket 754 A64's. I'm waiting for someone with more insight... this is getting confusing.
the CPU multiplyer only increases cpu operating speed, witch inturn needs an increase in core voltage..witch produces more heat.I prefer cool temps, and use minimum setting in power options..screensaver..to keep cool...but, the HT transport is limited to what the motherboard supports, it does not multiply over 1 gig..as far as I know..and I run the latest 939 SLI set up..regardless..front side buss speed is not constant with the AMD, that is why RAM timing is Important..My question to you is..mixed sticks..333 & 400...trying to manipulate RAM timing is futile
I'm just using 333 as an example. I just want to understand this fully... but I need a detailed explaination. You just nkinda hand it to me in bits... forget this. I don't have time to extract a full answer
Not trying to be rude... don't get me the wrong wya. But you don't seem to have the knowledge I seek or are unable to fully explain it. I leave you not to be rude but because I can't seem to find out what I need. When someone asks a question it is usually better and easier to explain the whole concept and not just bits of it as it comes up. It helps make it easier for the poster to understand the subject material.
precise questions make it easy for the person to try to figure out what you want, or, are trying to do...vague examples do not help
additionaly if it helps..there is no multiplication to RAM speed.you have a real clock speed and you an efective clock speed..the speed never goes obove the real clock speed. wich..400.or 333. the timings for example 3338 would be considered a default setting for a 400 stick..with a CPU operating between 2.40 to 2.80..if you increase core speed to your CPU...you need to adjust for the imbalance between CPU output...and ram assessment,not out put speed...it only helps to balance the processor output to memory calibration
That helps a little... but I've already sent a PM to crowy... We'll see what I get from him... Thanks for trying though. I'm pretty dumb though lol.
