wrath64

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If it is, then I'm sorry :D

I have 2 1GB ddr2-800.

If I add another 2 1gb ddr-2 800 does this make my speed 3200 in dual channel?

if this is a dumb question please still answer, and feel free to flame me if it is :lol:
 
If it is, then I'm sorry :D

I have 2 1GB ddr2-800.

If I add another 2 1gb ddr-2 800 does this make my speed 3200 in dual channel?

if this is a dumb question please still answer, and feel free to flame me if it is :lol:

No. And it doesn't make your cpu move up to the next highest model either. However, it does increase and double your system RAM from the original 2 GBs to 4 GBs. Now if you had a turntabe and were playing some old 33 1/3's, you'd be talkin' some real whacky stuff over here in the hardware forumz.
 

phassat

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Is the brand of both memory should be the same if i put 2x 2x1GB?
I imagined that the speed will follow the slowest one but the capacity is still 4GB....
What will be the pain the bump?
 

wrath64

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If it is, then I'm sorry :D

I have 2 1GB ddr2-800.

If I add another 2 1gb ddr-2 800 does this make my speed 3200 in dual channel?

if this is a dumb question please still answer, and feel free to flame me if it is :lol:

No. And it doesn't make your cpu move up to the next highest model either. However, it does increase and double your system RAM from the original 2 GBs to 4 GBs. Now if you had a turntabe and were playing some old 33 1/3's, you'd be talkin' some real whacky stuff over here in the hardware forumz.


hehe, ok memory will stay at 1600 at 4gb if I overclock cpu 1600 FSB?
 

phassat

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If it is, then I'm sorry :D

I have 2 1GB ddr2-800.

If I add another 2 1gb ddr-2 800 does this make my speed 3200 in dual channel?

if this is a dumb question please still answer, and feel free to flame me if it is :lol:

No. And it doesn't make your cpu move up to the next highest model either. However, it does increase and double your system RAM from the original 2 GBs to 4 GBs. Now if you had a turntabe and were playing some old 33 1/3's, you'd be talkin' some real whacky stuff over here in the hardware forumz.


hehe, ok memory will stay at 1600 at 4gb if I overclock cpu 1600 FSB?

Your memory will stay at DDR2-800 or PC6400... you can overclock but there's no way to overclock it into DDR2-1600 or PC12800... You will probably able to overclock it to DDR2-900 or DDR2-1000 if your memory is a high performance one.

If you use Vista, or use a lot of program at once, the memory will helps... not become quicker, but you'll eliminate a bottleneck... However 4GB won't be read 4GB at Vista 32 bit, you'll have to use Vista 64 bit if you want capitalize the memory.
 

DJ_Jumbles

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No, this won't make your memory speed 1600mhz. They stay at 800mhz.

You should make sure that the latency and timings of the RAM you are installing are the EXACT same as the ones that you already have. In other words: just buy another 2gb set of the same memory you have, otherwise, your timings might be messed up.
 

phassat

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No, this won't make your memory speed 1600mhz. They stay at 800mhz.

You should make sure that the latency and timings of the RAM you are installing are the EXACT same as the ones that you already have. In other words: just buy another 2gb set of the same memory you have, otherwise, your timings might be messed up.

Now I have Super Talent PC8000 2GB Kit with CAS5. As you know that Super Talent is incredibly hard to find... If let say I buy OCZ or Corsair PC8000 2GB Kit and I overclock both memory to have 4-4-4-12 timing... will this be okay?
 

wrath64

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I will buy the same memory as the ones I have now. I thought if you have them in dual channel (ddr2-800 = 1600), or do I have this wrong? Although I will not get 1600 if my system stock speed is 1333.

thanks for the replies :)
 

phassat

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I will buy the same memory as the ones I have now. I thought if you have them in dual channel (ddr2-800 = 1600), or do I have this wrong? Although I will not get 1600 if my system stock speed is 1333.

thanks for the replies :)

No, it won't be 1600... your system maximum FSB is 1333 means that you can use Memory up to 1333Mhz if I'm not mistaken... so every single memory that you use has to be 1333Mhz memory to achieve this... Let's wait further details from the experts...
 

wrath64

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I will buy the same memory as the ones I have now. I thought if you have them in dual channel (ddr2-800 = 1600), or do I have this wrong? Although I will not get 1600 if my system stock speed is 1333.

thanks for the replies :)

No, it won't be 1600... your system maximum FSB is 1333 means that you can use Memory up to 1333Mhz if I'm not mistaken... so every single memory that you use has to be 1333Mhz memory to achieve this... Let's wait further details from the experts...


What? yes please where are the experts?
 

phassat

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I'm quite sure that the data path between the CPU and main memory on your motherboard is up to 1333 Mhz... But if your memory don't have the ability to deliver 1333Mhz, it's just wont.

DDR3 is around the corner and it can use this FSB but it's expensive and the latency is too high to make it undisputed winner compared to high end DDR2

What's your motherboard and memory anyway?
 

wrath64

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I'm quite sure that the data path between the CPU and main memory on your motherboard is up to 1333 Mhz... But if your memory don't have the ability to deliver 1333Mhz, it's just wont.

DDR3 is around the corner and it can use this FSB but it's expensive and the latency is too high to make it undisputed winner compared to high end DDR2

What's your motherboard and memory anyway?


well this is my furture build when july22 comes.

C2D e6750
GIGABYTE GA-P35C-DS3R
Corsair TWIN2X2048-6400C4 4-4-4-12

the system FSB will be 1333, If I overclock the system fsb to 1600 my memory should match that in dual channel, right?
 

phassat

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I'm quite sure that the data path between the CPU and main memory on your motherboard is up to 1333 Mhz... But if your memory don't have the ability to deliver 1333Mhz, it's just wont.

DDR3 is around the corner and it can use this FSB but it's expensive and the latency is too high to make it undisputed winner compared to high end DDR2

What's your motherboard and memory anyway?


well this is my furture build when july22 comes.

C2D e6750
GIGABYTE GA-P35C-DS3R
Corsair TWIN2X2048-6400C4 4-4-4-12

the system FSB will be 1333, If I overclock the system fsb to 1600 my memory should match that in dual channel, right?

I think the memory will match that, but it will not operates at 1600.... the first time you installed the memory, it will operates as the specs even that your fsb is 1333... So it will stay at 800Mhz but your bus is 1333 Mhz

That's not a bad thing as your fsb will not make any bottleneck for your memory.

When you overclock the fsb into 1600, I believe the memory becomes 960 Mhz (maybe.... er... masters helppp...) but normally you'll need more Volt to make the memory stable... and you'll also have to loosen the timing.

The memory speed is a balance of timing and speed. If you overclock the memory into 1000Mhz but the CAS becomes 6, what's the point? It's getting slower.
 

phassat

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The reason Gigabyte put FSB 1333Mhz on that mother board is because they want to support the next memory technology which is DDR3... So, the upgrade ability for memory is good for that motherboard.

but with DDR2, you won't achieve 1333Mhz nor 1600Mhz.... You'll have to use DDR3 which at this point is expensive and as the latency is pretty high, doesn't show too much advantage compared to use high end DDR2...

But your system should be good enough, and if you overclock, it will even better... Just be careful with cooling system that you'll use...
Your choice of memory is among the best and it's overclockable, but it's not as high as you imagine.

I think most system will be bottlenecked by Hard Drive anyway...
 

4745454b

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No, dual channel doesn't mess with the memory frequency at all. It increases the memory transfer rate by increasing the amount of information that can be transferred at a time. (If memory serves, by allowing a transfer of 128bps instead of 64bps.)

If you're running DDR2-800 in dual channel, the speed is 400MHz. (800MHz effective due to the Double Data Rate.) It doesn't transfer at 800MHz, or 1600MHz.

the system FSB will be 1333, If I overclock the system fsb to 1600 my memory should match that in dual channel, right?

EFFECTIVE FSB is 1333, the actual rate is 333.33MHz. DDR ram runs at Double Data Rate of this speed, or 667MHz. (this is assuming a 1:1 ratio with your FSB) If you overclocked your (effective) FSB to 1600, your base frequency will be 400MHz, and your RAM will be running at DDR2-800MHz.

I'm not sure you guys understand how this works, so I'll try to clue you in. Everything in your computer runs off of what I call a base frequency. This is the "default" speed that everything is ran off of. For instance, the FSB is quadpumped from this speed. If the base frequency is 250MHZ, then the FSB is 1000MHz. (250MHz * 4) If the CPU has a multiplier of 10, then the CPU speed is 2.5GHz. (250MHz * 10) If the ram is running on a 1:1 multiplier, then its running at DDR-500MHz. (250MHz * 2) By changing this base frequency you can make things run faster or slower.
 

wrath64

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OK one last time, before I jump out a window, if you dont hear back from me, then you know I'm f'd up!

So If I have 1 ddr2-800 stick the memeory speed is 800mhz?

If I add another 1ddr2-800 stick in dual channel the memory speed is still 800mhz?

Now I have a 2.66ghz 1333 CPU, my MB supports 1333 FSB. what memroy would I use for this setup?


Thanks for all your replies, really appreaciate it!
 

nvalhalla

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So If I have 1 ddr2-800 stick the memeory speed is 800mhz?

If I add another 1ddr2-800 stick in dual channel the memory speed is still 800mhz?



Thanks for all your replies, really appreaciate it!

Pretty much. We're arguing semantics here. The RAM is running at 400 double pumped (800 effective) If you have 2 sticks, then they are running at a sort of "quad pumped" 1600 effective. They are still technically running at 400, but are transferring data 4 times per clock cycle instead of once. This isn't really what matters. For all practical purposes, you are moving at 1600. If you have a FSB of 1333, then the RAM will be underclocked to 1333 by default or run asynchronously at 1600. DDR2-800 will be fine up to FSB 1600. If you want to OC higher than 1600, and you might with a 1333 base FSB, get 1066 RAM, or 800 RAM that overclocks well.
 

T8RR8R

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2 parts of the Quad(that means 4)pumped come from DDR and the other 2 parts come from the MCH. AMD CPU's are not quad pumped because they have the memory controller built in. Basically they are twin pumped, double pumped, or dual pumped. Whatever term you use it doesn't really matter because neither one is the true FSB.
 

Major_Trouble

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Well it all depends if you install your ram in parallel or in series...

No seriously now. If you have 2 sticks of identical speed / capacity /(hopefully latency) installed in two memory slots on your motherboard to put you into dual channel mode the speed of the memory phsically doesn't increase i.e. the mhz rating. What happens is the two sticks can be accessed at the same time (dual channel) doubling the transfer rate that can be achieved. Think of it as doubling the size of a garden hose but the water is flowing at the same speed.

If you added another 2 sticks of matching ram in the other 2 slots that ram may also be accessed in dual channel mode (depends on your motherboard and ram used). Now I don't believe that 4 sticks could be accessed all at the same time to effectivley quadruple the transfer rate. I am sure someone can put me straight on that.