GTX 1070: CPU-Z showing only 4004HZ

[Justforcause]

Hey guys,

is it normal that CPUZ showing only 4004hz of memory?

Pic: http://imgur.com/a/XtJZX

 

[LTC8K6]

Hey guys,

is it normal that CPUZ showing only 4004hz of memory?

Pic: http://imgur.com/a/XtJZX

Yes. GPU-Z will probably show 2002mhz.

It's 8Gbps memory, not 8Ghz memory.

 

[LTC8K6]

IIRC, GPU-Z reports the true clock speed, and CPU-Z reports the effective clock speed.

 

[Dufus]

Except that the effective speed in this case is 8008MT/s which with DDR would have a 4004MHz clock.

And things only get worse for the TXP, 1080 with GDDR5X which can operate in QDR but can also drop down to DDR.

 

[Justforcause]

I don't quite get it. So it's completely fine and my GPU is not faulty?

 

[LTC8K6]

Yes, it's just different ways of reporting the same thing. There are several different clock speeds involved with reporting memory specs.

DDR ram running at 500mhz bus transmits data twice per bus clock, so it's effective bus speed is 1ghz.

It's the same with your main ram. For example, DDR4-2133 is running at 1066mhz bus clock speed.

GDDR5 is QDR or quad pumped, so you get a multiple of 4.

 

[Dufus]

GDDR5 is QDR or quad pumped, so you get a multiple of 4.

I take it that's a typo as GDDR5 is double data rate DDR.

I would think GDDR5X is probably called GDDR5X instead of something like GQDR5 because it can operate in either QDR or DDR.

OP, don't worry about your graphics clock speed. Only issues I'm aware of were with 1070 and Micron memory which AFAIK is fixable with a VBIOS update for the earlier cards. Later cards should already have the fix.

 

[LTC8K6]

Yeah, left off the X, and not sure why I wrote it anyway, as the 1070 does not even use GDDR5X.