Memory speed on different software

[Altruist]

Why is my ram speed on hwinfo and cpuz 1330.24 mhz but on uefi bios and windows command prmt 2666mhz

Does ram speed change depending load or require bandwith?

[porina]

The real ram speed is 1333 MHz. The marketing speed is double that, at 2666 MT/s, but they often label it MHz instead. Basically the real speed is the clock that the ram runs on. Marketing likes bigger numbers, so they count the effective speed as there are two transfers for each clock.

[Altruist]

2 hours ago, porina said:

The real ram speed is 1333 MHz. The marketing speed is double that, at 2666 MT/s, but they often label it MHz instead. Basically the real speed is the clock that the ram runs on. Marketing likes bigger numbers, so they count the effective speed as there are two transfers for each clock.

My kit - https://www.cclonline.com/product/247321/TLGD48G2400HC14DC01/Desktop-Memory/Team-Group-Vulcan-T-Force-8GB-2-x-4GB-PC4-19200-C14-2400MHz-DDR4-Dual-Channel-Kit-Gray-/RAM3672/

 

So even thought the memory speed is labled 2400mhz it runs at 1333mhz?

 

And if thats is the case, what speed is this kit running at?

https://www.amazon.co.uk/Corsair-CMK16GX4M2B3000C15-Vengeance-Performance-Desktop/dp/B0134EW7G8/ref=sr_1_2?ie=UTF8&qid=1535287650&sr=8-2&keywords=3200mhz+ram

 

[porina]

Can you post a screenshot of CPU-Z on the SPD tab, with one of the ram sticks selected?

 

The module based on the title is rated to a marketing speed of 2400, so it should be able to run at that. Just remember it would show as 1200 in software tools that report the correct clock. This is normal.

 

That it is apparently running at 2666, I can think of two possible reasons for that. 1, you chose to overclock it, intentionally or otherwise. 2, the module actually supports the higher speed in XMP profile, and the mobo is using that. I have seen cases where modules report themselves supporting higher speeds than they were sold at.

[Altruist]

5 minutes ago, porina said:

Can you post a screenshot of CPU-Z on the SPD tab, with one of the ram sticks selected?

 

The module based on the title is rated to a marketing speed of 2400, so it should be able to run at that. Just remember it would show as 1200 in software tools that report the correct clock. This is normal.

 

That it is apparently running at 2666, I can think of two possible reasons for that. 1, you chose to overclock it, intentionally or otherwise. 2, the module actually supports the higher speed in XMP profile, and the mobo is using that. I have seen cases where modules report themselves supporting higher speeds than they were sold at.

I went and changed speed to 2400mhz in bios and speed in hwinfo went to 1192mhz so what your saying believeable

While i was down there i also change timings to -1 everything.

[Altruist]

18 minutes ago, porina said:

Can you post a screenshot of CPU-Z on the SPD tab, with one of the ram sticks selected?

 

The module based on the title is rated to a marketing speed of 2400, so it should be able to run at that. Just remember it would show as 1200 in software tools that report the correct clock. This is normal.

 

That it is apparently running at 2666, I can think of two possible reasons for that. 1, you chose to overclock it, intentionally or otherwise. 2, the module actually supports the higher speed in XMP profile, and the mobo is using that. I have seen cases where modules report themselves supporting higher speeds than they were sold at.

 

[porina]

Note there are two lines there fore 1200, and none for 1333. So I don't know how you had set it before, but it was an overclock. If it was stable, you can continue running at 2666 if you like. If you get unexpected crashes, that could point to unstable ram though. As the difference isn't great, the safer option is to stick to what the modules are rated at.

 

The two lines with 1200 are what the module reports to the system, and note they have different timings. The one at the top is probably JEDEC industry standard. Safe timings for the speed. The one at the bottom is XMP, and more aggressive on timings. Turn on XMP in bios and it should use those settings, assuming you put timings back to auto if you've manually set them now.

[Altruist]

1 minute ago, porina said:

Note there are two lines there fore 1200, and none for 1333. So I don't know how you had set it before, but it was an overclock. If it was stable, you can continue running at 2666 if you like. If you get unexpected crashes, that could point to unstable ram though. As the difference isn't great, the safer option is to stick to what the modules are rated at.

 

The two lines with 1200 are what the module reports to the system, and note they have different timings. The one at the top is probably JEDEC industry standard. Safe timings for the speed. The one at the bottom is XMP, and more aggressive on timings. Turn on XMP in bios and it should use those settings, assuming you put timings back to auto if you've manually set them now.

Yes ik i oc'ed it abck to 2666mhz