PC2-8500 Memory working at 6400??

[marcosdipaolo]

Unless someone convince me otherwise, i keep believeing the memory is working at 6400, not 8500
It's about a Gigabyte UD3(rev.1.0) latest bios version (F9) and a 2x2GB DDR2 sticks Corsair Dominator 1066Mhz PC2 8500.
I tried several things including changing the settings from auto to manual configs either in the timing and the voltage.
Here I attach several screenshots from Easytune6, CPU-Z and the bios.
Hope somebody gives me a hint??
I want to add that the bios as well as the memtest state that the memory runs at 533 Mhz (533x2=1066Mhz??) but that is supposed to mean PC2 8500, but either Easytune as CPU-Z states PC2 6400.
Voltage is at 2.1 at the moment, and the timing is set manually 5,5,5,15 Command Rate=2, not in auto as you see in the screenshots.
Is the memory working alright? I have some about 2 crashes a-day and i started checking the memory beside a possible mouse problem I have which I'll solve tomorrow when the new mouse arrives.
In the following answer i'll upload some more screenshots.

 

[marcosdipaolo]

 

[sygnus21]

Hi marco,

Your memory is actually running at it's max speed of 1066. If you look at the first image I copied, since the memory is dual channel, you take that number and multiply it by two and that's the speed the RAM is running at - in this case 1066.4

Also, looking at the second image gives you an idea of what the RAM is capable of at given settings - looking at the 3 sets of numbers, again, we see 533 - which is what your system is using, and when multiplied by 2 = 1066.

Memtest also confirms what I've stated..... Notice under settings.... RAM: 533 (DDR1066) Dual Channel. Again, since the RAM is dual channel, take 533 x 2 = 1066



By the way the PC8500 spec is 1066MHz RAM, so you RAM IS running at the correct speed.

Hope this answers your question.

 

[marcosdipaolo]

Hi marco,

Your memory is actually running at it's max speed of 1066. If you look at the first image I copied, since the memory is dual channel, you take that number and multiply it by two and that's the speed the RAM is running at - in this case 1066.4

Also, looking at the second image gives you an idea of what the RAM is capable of at given settings - looking at the 3 sets of numbers, again, we see 533 - which is what your system is using, and when multiplied by 2 = 1066.

Memtest also confirms what I've stated..... Notice under settings.... RAM: 533 (DDR1066) Dual Channel. Again, since the RAM is dual channel, take 533 x 2 = 1066



By the way the PC8500 spec is 1066MHz RAM, so you RAM IS running at the correct speed.

Hope this answers your question.

thanks!!
Any reason why then in the second image you read PC2-6400 instead of PC2-8500???

 

[sygnus21]

Any reason why then in the second image you read PC2-6400 instead of PC2-8500???

It's kind of hard to explain as i'm not really sure why, but it's just the way CPU-Z reads the module. Since the standard for DDR2's "official" max bandwidth is 800MHz (400 x 2) that's what CPU-Z reads it at, even though it does recognize you have 1066MHz RAM.

Hope this clarifies things.