Dual Channel PC2-5300 beats Dual Channel PC2-6400?

[pinoy3000]

According to this, the bandwidth is higher...




When I set my E6600 to 3.2GHz with 400MHz FSB x 8 Multiplier, when BIOS booted it showed PC2-5300 instead of PC2-6400. The memory was running at 1000MHz 5-5-5-15 timing, when I loosen it to 1:1 ratio for 800MHz 4-4-4-12, it was running at PC2-4200 Dual Interleave.

But when I increased the RAM to 1200MHz 6-6-6-18, it said PC2-6400 in the BIOS.

But why on that image above show that PC2-5300 in Dual Channel is capable of 10.667GB/s bandwidth?

 

[AP4LIFETN]

cuz 5300 x 2 = 10600

 

[pinoy3000]

and 6400 x 2 is 12800.

But how come on the PC2-6400 one on that spreadsheat its only 6.4GB/s in Dual or Single Channel.

So it should be 12.8GB/s then?

 

[MaV II DARK II]

and 6400 x 2 is 12800.

But how come on the PC2-6400 one on that spreadsheat its only 6.4GB/s in Dual or Single Channel.

So it should be 12.8GB/s then?

I got no idea

 

[veg1992]

According to this, the bandwidth is higher...




When I set my E6600 to 3.2GHz with 400MHz FSB x 8 Multiplier, when BIOS booted it showed PC2-5300 instead of PC2-6400. The memory was running at 1000MHz 5-5-5-15 timing, when I loosen it to 1:1 ratio for 800MHz 4-4-4-12, it was running at PC2-4200 Dual Interleave.

But when I increased the RAM to 1200MHz 6-6-6-18, it said PC2-6400 in the BIOS.

But why on that image above show that PC2-5300 in Dual Channel is capable of 10.667GB/s bandwidth?

well we don't know for sure.. because they didn't test the ddr2 800 on a e6n50 CPU..

 

[pinoy3000]

well we don't know for sure.. because they didn't test the ddr2 800 on a e6n50 CPU..

Oh, I get it, the faster the CPU the better performance on Dual Channel too right?

I think this is how it works.....

for PC2-6400..... 6400/8 = 800MHz, so for 5300 is actually 5336/8 = 667MHz

Now if you have RAM at 1000MHz, its PC2-8000 = 1000MHz. 1000MHz in Dual Interleave/Channel has a bandwidth of 16 GB/s.

And there is a PC2-10664 which they say is PC2-10000 and has a Bandwidth of 20 GB/s.

I think I get how PC2-(Value Here) and how it works now. Hehe

I think thats how it is.... The "Value Here" is the bandwidth and in dual channel its two times the "Value Here"

But it wont really become effective untill CPU's will reach the same bandwidth.

So with a CPU that has a 1066MHz FSB its Bandwidth is 8 times the FSB which is 8532 MB/s or 8.5 GB/s

So a 1333 MHz FSB will have 10667 MB/s. So for the PC2-6400 to be effective at 12.8GB/s you need to have a 1600MHz FSB on your CPU and run 1:1 ratio.

So PC2-6400 running at 800MHz and your CPU has an FSB of 1600MHz which is 400MHz FSB on the BIOS. The 1600MHz FSB is the "Effective" and on C2D and C2Q its 4 times the FSB.

So if you have say..... CPU with 400Mhz and 8 Multiplier its 3.2GHz and 1:1 FSB:RAM ratio you will get both the same CPU and Memory Bandwidth which will be 12.8 GB/s.

Wow, this Frequency and bandwidth stuff is awesome. I never knew how they figured out the bandwidth until now.

So right now, the CPU is lagging behind the Memory Technology. The memory speeds are way ahead of the CPU's. The PC2-6400 is meant to be designed and work greatly with a 1600MHz Effective FSB CPU's which is not out yet. This is without Overclocking.

 

[Vaanish]

I got no idea

Don't post then...


Anyway, I thought Dual Channel only offerd a 5% increase?

 

[lancec2c30]

maybe on older ddr400 ram?

 

[veg1992]

Don't post then...


Anyway, I thought Dual Channel only offerd a 5% increase?

seriously.. i agree Vaanish.. but Mav seriously.. don't post unless you know whats going on or if you have a prediction..

and correct Pinoy... the PC2 speed is the regular speed multiplied by 8...

so taht solves that eh guys?