GPU Memory Clock Speed Question

[Geekazoid]

Hi guys,

I've got a rather curious question about GPU memory clock speeds.

Here it is:

• How come when a GPU memory's clock speed is shown in MHz and they do "x4", why is it then shown in brackets as Gbps?

I'll give you an example.

Take NVIDIA's GPU the GTX 770. It's memory clock speed would be shown as 1750MHz x4 and then in brackets (7Gbps). Shouldn't it be shown as (7GHz)?

I hope that's easy enough to understand. :unsure:

Thanks in advance for your help.

[piggykid1]

Sorry I can't help, but I wanted to say I have had this same question maybe the times 4 makes people buy it hahaha

[Shd0w2]

this is also the same for ram speeds, seems kinda obvious, just thought id throw it out.

edit, except its 2x

[Geekazoid]

I'm more specifically referring to the fact that they put the full clock speed in brackets as "Gbps" instead of "GHz". You wouldn't say that 4,000KG equals 1GHz would you? It just doesn't sound right.

[D3MON]

I'm more specifically referring to the fact that they put the full clock speed in brackets as "Gbps" instead of "GHz". You wouldn't say that 4,000KG equals 1GHz would you? It just doesn't sound right.

its a misprint, 1750mhz(gddr5)=7ghz or 7000mhz "effective"

the only time you can get a transfer speed is when you talk bandwidth i.e r9-290 with 1250mhz(x4)is 5ghz effective and with a 512 bit wide bus that means it can transfer data into the frame buffer (vram) at 320GB/second

fyi its not the same as ram speeds.

ddr3 1333 ram is also named/called 10600 (you wont really hear it called that verbally obviously) this is because it can transfer 10.6GB/s of data, double that if run in dual channel.

[Geekazoid]

its a misprint, 1750mhz(gddr5)=7ghz or 7000mhz "effective"

That's what I thought. But I think NVIDIA and AMD have put "Gbps" instead of "GHz" under the specifications of each of their GPUs.

I think they're a little confused to be honest. :huh:

the only time you can get a transfer speed is when you talk bandwidth i.e r9-290 with 1250mhz(x4)is 5ghz effective and with a 512 bit wide bus that means it can transfer data into the frame buffer (vram) at 320GB/second

Yep, this what I thought also. They really need to fix it.

[A10-FTW]

GDDR5 is x4

 

DDR3 (or GDDR3) is x2

 

 

 

so, if you have 1250 mhz of DDR3 = 2500 mhz of eVram speed

 

and if you have 1250 mhz of GDDR5 = 5000 mhz of eVram speed

 

 

 

(is not perfect, but help to see the point)  :rolleyes:

 

 

 

DDR is x1  :blush:

[Geekazoid]

GDDR5 is x4

 

DDR3 (or GDDR3) is x2

 

so, if you have 1250 mhz of DDR3 = 2500 mhz of eVram speed

 

and if you have 1250 mhz of GDDR5 = 5000 mhz of eVram speed

 

(is not perfect, but help to see the point)  :rolleyes:

 

DDR is x1  :blush:

Thanks for that!