Corsair Vengeance - Problem?

Ingenious TROLL

Ingenious TROLL

Ingenious TROLL

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Hey guys,

Got 8GB (2x4GB) Corsair Vengeance DDR3 1600MHz thorough the post recently.

I've only even plugged in and away I go, but on this occasion it seems they're running at half the speed, only 800MHz; is this normal? What am I doing wrong?

I've used a programme called 'Speccy' to evaluate my system etc, which has indicated this is the speed they're working at.
 
You need to double what the programe shows as your running double data rate.

CPU-Z shows this as well, but double check with this as well.

I have asked for this to be moved :)
 
[Moved]

Have you checked the profile of the memory in the BIOS?

The program is showing the data rate of 800Mhz which is PC3-12800 or 1600MHz effective.

This is correct.


Understanding the bandwidths

With data transferred at 64 bits per module DDR3 gives a transfer rate (memory clock rate) × 4 (for bus clock multiplier) × 2 (for data rate) × 64 (number of bits transferred) / 8 (number of bits/byte).

For example, a system with a bus speed of 133MHz requires memory to run at 533MHz or 1066MHz effective. (133MHz x 4 = 533MHz) x 2 = 1066MHz

DDR3-1066 runs at a frequency of 8500MHz (1066MHz x 8 bits). Thus DDR3-1066 is also referred to its bandwidth. In this case PC3-8500.
Click to expand...

Understanding DDR3 - Huddysworld
 
RJC said:
You need to double what the programe shows as your running double data rate.

CPU-Z shows this as well, but double check with this as well.

I have asked for this to be moved :)
Click to expand...

Will do, cheers.

So effectively the speed shown, I can double for a true figure?

I will download CPU-Z this eve.
 
Your 800Mhz is correct.

Different programs show different interpretations. 800Mhz is the data rate, 1,600Mhz is the effective transfer speed. 12,800MHz is the bandwidth.. all the same.

Sorry i did edit my post adding the link.
 
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