GTX 1080 Memory Clock and Memory Used issues

[Miguel_49]

Hi. I have a Galax GTX 1080 HOF Edition. Am I getting the right readings or is something wrong?

Default Clock: 1734 mhz
Memory Clock: 1251 mhz
Boost: 1873 mhz

after OC

GPU: 1819 mhz
Memory: 1389 mhz
Boost: 1958 mhz

Sensor readings (MAX):
GPU Core Clock: 2062.5 mhz
Memory: 1389.2 mhz
Temp: 70C
Memory Used: 1765 MB
GPU Load: 100%

I was wondering because Ive been reading online how others have high readings on memory clocks and memory used. I have another PC running an Asus 1070 Dual and the Memory Clock is running higher than the Core Clock.

Thanks in advance.

 

[EpIckFa1LJoN]

Are you sure you're reading that right? My 1080 clocks at 5400MHz (10800MHz), where that version should be at least at 5000MHz (10000MHz)

Your performance would be severely crippled at that speed. How are your benchmarks?

 

[Miguel_49]

Are you sure you're reading that right? My 1080 clocks at 5400MHz (10800MHz), where that version should be at least at 5000MHz (10000MHz)

Your performance would be severely crippled at that speed. How are your benchmarks?

Yup. Not really sure what is going on. Also wondering why I am only using a fraction of my supposedly 8GB memory. My 1070 on the other PC atleast shows 29xx MB memory used. Mine is only at 1756 MB at 100% load. Or am I reading all of this wrong and everything is actually normal? Thanks for the swift reply.

As for benchmarks, I am doing between 7700 - 78xx at 3d Mark Time Spy for my graphics score.

 

[EpIckFa1LJoN]

Oh no that's fine, the problem is you're using GPU-Z to monitor that. I bet if you pulled up MSI:AB or another monitoring software it would be over 5000MHz easy. IDK why GPU-Z displays it like that. It's very confusing as tech specs are listed as the total (10000MHz or 10GHz) Monitoring software lists it as half that (5000MHz) and GPU-Z has it's own thing. IDK. It's confusing.

 

[Miguel_49]

Whew. Thanks Jon. Cheers!

 

[TJ Hooker]

Oh no that's fine, the problem is you're using GPU-Z to monitor that. I bet if you pulled up MSI:AB or another monitoring software it would be over 5000MHz easy. IDK why GPU-Z displays it like that. It's very confusing as tech specs are listed as the total (10000MHz or 10GHz) Monitoring software lists it as half that (5000MHz) and GPU-Z has it's own thing. IDK. It's confusing.

The memory clock generated for 10 Gbps VRAM is 2500 MHz. It is then doubled to 5000 MHz. Data is transferred on both rising and falling clock edges, so effective transfer rate is doubled again, giving you the advertised speed of 10 GHz. That's why applications will often report either 1/2 or 1/4 of the rated VRAM speed. I've never seen an application (including GPU-Z) report 1/8 the value, which is what seems to be the case for the OP.

 

[EpIckFa1LJoN]

Oh no that's fine, the problem is you're using GPU-Z to monitor that. I bet if you pulled up MSI:AB or another monitoring software it would be over 5000MHz easy. IDK why GPU-Z displays it like that. It's very confusing as tech specs are listed as the total (10000MHz or 10GHz) Monitoring software lists it as half that (5000MHz) and GPU-Z has it's own thing. IDK. It's confusing.

The memory clock generated for 10 Gbps VRAM is 2500 MHz. It is then doubled to 5000 MHz. Data is transferred on both rising and falling clock edges, so effective transfer rate is doubled again, giving you the advertised speed of 10 GHz. That's why applications will often report either 1/2 or 1/4 of the rated VRAM speed. I've never seen an application (including GPU-Z) report 1/8 the value, which is what seems to be the case for the OP.

A quick google check shows that is always the case. I will do GPU-Z on my own when I get home I am sure it will say the same. The default for all 1080's is 1251

 

[TJ Hooker]

Spoiler

Oh no that's fine, the problem is you're using GPU-Z to monitor that. I bet if you pulled up MSI:AB or another monitoring software it would be over 5000MHz easy. IDK why GPU-Z displays it like that. It's very confusing as tech specs are listed as the total (10000MHz or 10GHz) Monitoring software lists it as half that (5000MHz) and GPU-Z has it's own thing. IDK. It's confusing.

The memory clock generated for 10 Gbps VRAM is 2500 MHz. It is then doubled to 5000 MHz. Data is transferred on both rising and falling clock edges, so effective transfer rate is doubled again, giving you the advertised speed of 10 GHz. That's why applications will often report either 1/2 or 1/4 of the rated VRAM speed. I've never seen an application (including GPU-Z) report 1/8 the value, which is what seems to be the case for the OP.

A quick google check shows that is always the case. I will do GPU-Z on my own when I get home I am sure it will say the same. The default for all 1080's is 1251

You're right, GPU-Z does report 1251 MHz for GTX 1080 VRAM speed. After a bit of further investigation, it's because the 1080 uses GDDR5X which doubles the data rate yet again, so real memory clock is 1/8 effective clock speed. Regular GDDR5 (which is what I'm used to) clock speed is reported as 1/4 effective speed in GPU-Z.

 

[EpIckFa1LJoN]

Spoiler

Oh no that's fine, the problem is you're using GPU-Z to monitor that. I bet if you pulled up MSI:AB or another monitoring software it would be over 5000MHz easy. IDK why GPU-Z displays it like that. It's very confusing as tech specs are listed as the total (10000MHz or 10GHz) Monitoring software lists it as half that (5000MHz) and GPU-Z has it's own thing. IDK. It's confusing.

The memory clock generated for 10 Gbps VRAM is 2500 MHz. It is then doubled to 5000 MHz. Data is transferred on both rising and falling clock edges, so effective transfer rate is doubled again, giving you the advertised speed of 10 GHz. That's why applications will often report either 1/2 or 1/4 of the rated VRAM speed. I've never seen an application (including GPU-Z) report 1/8 the value, which is what seems to be the case for the OP.

A quick google check shows that is always the case. I will do GPU-Z on my own when I get home I am sure it will say the same. The default for all 1080's is 1251

You're right, GPU-Z does report 1251 MHz for GTX 1080 VRAM speed. After a bit of further investigation, it's because the 1080 uses GDDR5X which doubles the data rate yet again, so real memory clock is 1/8 effective clock speed. Regular GDDR5 (which is what I'm used to) clock speed is reported as 1/4 effective speed in GPU-Z.

Good to know, now I know WHY it is reporting that. I wonder if GDDR6 will double it again? Volta Perhaps? That should be some INSANELY fast VRAM, right? lol.