yasamoka
Badieh, how are you supposing that bandwidth hasn't changed? Run a memory bandwidth benchmark and see for yourself.
First of all, you calculate RAM bandwidth this way:
DDR means Double Data Rate...meaning 2 transfers per clock cycle. Let's suppose we are trying to calculate the bandwidth offered by a single stick of DDR3-1600 (or DDR3-12800, you'll now know why it can be called this too). 1600MHz = 1.6 billion transfers per second, or 1.6GT/s. This memory is 64-bits wide, meaning 8 bytes per transfer. So bandwidth is 1.6GT/s * 8B/transfer = 12.8GB/s.
Running in dual channel would give you 12.8GB/s * 2 = 25.6GB/s theoretically.
Of course dual channel, triple channel, and quad channel would improve bandwidth.
You don't think X79 Intel chipset supports quad channel RAM just for fun, do you?
Badieh
Avok and nuclearcat, I'm not saying single channel performs better than dual channel, I know quite well that dual channel performs much better than single channel. But to achieve a true dual channel, you need a RAM kit. My question is that I have two normal DDR3 - 1333 RAMs, neither Patriot, HyperX, nor Corsair kits. Would it still achieve a dual channel performance just by slotting it?
Yasamoka, the picture I posted is from the ASUS system information window. It shows all about the RAMs on the Mobo, havent seen anything changed after I re-slotted them to a dual channel position.
yasamoka
It WOULD achieve dual channel, man. Dual channel is independent of RAM sticks. It is a motherboard / CPU / RAM controller feature.
You DO NOT need RAM kits to achieve "true" dual channel.
ASUS system information window does not show you bandwidth. Use a RAM bandwidth benchmark tool for that. I can't remember the tool's name now. When I do, I will link you.
AvoK95
Third time I'm saying ANY Ram can be dual channel as long as both sticks are identical.
Badieh
After reading
this article, I got a much better idea on how things work with the dual channel RAM. They suggested I download CPU-Z and check the memory. I did so and this is what I got:
You can clearly see the word "Dual" in the channel, however the DRAM is still 668 MHz, shouldn't it be more in dual channel? And most of the info stated are close to the picture I linked earlier.
yasamoka
Clockspeed does not increase...throughput increases. Let me explain it in another way:
You have a dual core processor with architecture x, running @ 3GHz. You also have a quad core processor of the same architecture x, running @ 3GHz too. The quad core processor has a theoretical maximum of double the processing power, if the workload being processed on the CPU is parallel enough to utilize the additional cores with no extra delays. But the quad core clockspeed does not become 6GHz. You just have more units.
With dual channel, you have 2 units of RAM running at the same speed instead of 1 unit. This gives double the throughput, theoretically speaking.
Badieh
Yeah I understand what you said, just thought the program would actually show the dual performance since it is already showing Dual Channel.
MohammedSF
The reason for making dual/triple/quad channel kits because even you buy identical sticks they aren't 100% identical and have slightly different speed/bandwidth/latency/voltage & OC'ability..
That's because they aren't made from the same identical chips "the same piece of silicon", for that reason manufacturers offers the kits witch is picking 2,3 & 4 sticks from the production line in series witch will guarantee +99% identical sticks..
For example, look at the 2600k processor, some can't OC more than 4.5GHz and some would go 6GHz+ !
Badieh
MohammedSF wroteThe reason for making dual/triple/quad channel kits because even you buy identical sticks they aren't 100% identical and have slightly different speed/bandwidth/latency/voltage & OC'ability..
That's because they aren't made from the same identical chips "the same piece of silicon", for that reason manufacturers offers the kits witch is picking 2,3 & 4 sticks from the production line in series witch will guarantee +99% identical sticks..
For example, look at the 2600k processor, some can't OC more than 4.5GHz and some would go 6GHz+ !
Agreed! Just wish there was some program to actually compute the performance of the Dual channel cause I hardly found any difference when i switched them to dual channel.
yasamoka
Use MaxxMEM and run the benchmark with single channel then dual channel.
Beej
668mhz per cycle, multiply by 2 since its double data rate, you get ~1333 mhz.
And no you dont need kits, you can run different ram sticks if you want from different companies ( as long as voltage is respected).
Example i can run a kingston 800mhz 1.8v ddr2 stick, with hynix 667mhz 1.8v ram. They will run in dual channel, but with 667 speeds.
So you can mix a kingston 1333 mhz ram with samsung 1600 mhz ram and you will be fine. Sometimes you might get problems, but most of the times your A ok.
Generaly kits are sold for a few reasons, these ram sticks have serial number and are bios identified, these sticks are simultanous. Also kits are tested together to insure no such problems would occur. It has nothing to do with oc potential when getting single stick vs kit.
Corsiar dominators gtx6 ram sell by 1 stick.
