Videocard problem

[foxyyS]

Hello, so i bought the card below and you know everything is fine, but im using the asus h81m-k motherboard which has "Asus optimal mode" which boosts cpu and gpu. So im running heaven benchmark app and it says that the card runs with 1490 Mhz and only 3350 memory clock. Why

[Princess Luna]

Why what? everything you said is normal/fine?

[foxyyS]

5 minutes ago, Princess Cadence said:

Why what? everything you said is normal/fine?

In the msi site it says that it runs at 6650 memory clock* ...

[3 Lions]

2 minutes ago, foxyyS said:

In the msi site it says that it runs at 6650 mhz ...

You mean memory speed? 

[Mira Yurizaki]

1 minute ago, foxyyS said:

In the msi site it says that it runs at 6650 mhz ...

If you're talking about the memory clock, MSI is talking about the effective speed, which is double the clock speed. What you saw is probably the actual clock rate.

[foxyyS]

1 minute ago, M.Yurizaki said:

If you're talking about the memory clock, MSI is talking about the effective speed, which is double the clock speed. What you saw is probably the actual clock rate.

So if in a site says 5500 memory clock does that mean its half of it ?

[Mira Yurizaki]

Just now, foxyyS said:

So if in a site says 5500 memory clock does that mean its half of it ?

Modern RAM has something known as double data rate (or in some cases, quad data rate). Basically, for every up and down transition of the clock signal, the memory sends data. This means the memory runs effectively at twice the clock speed.

[foxyyS]

1 minute ago, M.Yurizaki said:

Modern RAM has something known as double data rate (or in some cases, quad data rate). Basically, for every up and down transition of the clock signal, the memory sends data. This means the memory runs effectively at twice the clock speed.

Yes but look what the msi site says ... Should i disable asus boost mode ? 

[Mira Yurizaki]

Just now, foxyyS said:

Yes but look what the msi site says ... Should i disable asus boost mode ?

What we're saying is there's nothing wrong with your video card. You're looking at what appears to be conflicting data even though they all mean the same thing.

[foxyyS]

Just now, M.Yurizaki said:

What we're saying is there's nothing wrong with your video card. You're looking at what appears to be conflicting data even though they all mean the same thing.

I mean why is heaven bench saying that i have 3350 memory clock and on the msi site it says that i should have 6650 i dont get it sorry for waisting ur time

 

[Mira Yurizaki]

5 minutes ago, foxyyS said:

I mean why is heaven bench saying that i have 3350 memory clock and on the msi site it says that i should have 6650 i dont get it sorry for waisting ur time

The way GDDR5 works is there's two different clocks: the command clock (CK) and a forwarded write clock (WCK). CK is what's used to process commands and address access. WCK is used for transferring data (the name is a bit of a misnomer). WCK operates at twice the speed of CK, but since data transfer is still using a double data rate, the effective speed of data transfers is twice that of WCK.

 

What Heaven is reporting is the WCK. What MSI is reporting is the effective data rate, which is double that of WCK.

[foxyyS]

1 minute ago, M.Yurizaki said:

The way GDDR5 works is there's two different clocks: the command clock (CK) and a forwarded write clock (WCK). CK is what's used to process commands and address access. WCK is used for transferring data (the name is a bit of a misnomer). WCK operates at twice the speed of CK, but since data transfer is still using a double data rate, the effective speed of data transfers is twice that of WCK.

 

What Heaven is reporting is the WCK. What MSI is reporting is the effective data rate, which is double that WCK.

Mhm so there are no slowdowns right ?

[Mira Yurizaki]

Just now, foxyyS said:

Mhm so there are no slowdowns right ?

No. There's nothing wrong with your video card.

[foxyyS]

Just now, M.Yurizaki said:

No. There's nothing wrong with your video card.

Ok ty very much <3

[3 Lions]

To make this easier to understand I will use my card as an example, so on any OSD (On Screen Display) it shows my memory is running at 4552MHz however you have to times that by 2 which is 9104MHz. That 9104MHz is my effective speed clock I know this because my memory speed is now 9Gbps.