Graphics Terms

[Arshdeep]

Its been a while and I learned more about ibm (pc) architecture and now I am doughtung my old "theories."

Please define the following terms and explain their relations.

 

Memory Bandwith:

 

for example in the forms

Gb/s

and

256 bit

 

How come 192bit results in 1gb and 3 gb cards?

 

For Refrence, I have a XFX 7850 I Gb 256-bit (FX-785A-ZNL4-ish)

 

newegg:http://www.newegg.com/Product/Product.aspx?Item=N82E16814150642

...ncix...

[FireFox]

Its been a while and I learned more about ibm (pc) architecture and now I am doughtung my old "theories."

Please define the following terms and explain their relations.

 

Memory Bandwith:

 

for example in the forms

Gb/s

and

256 bit

 

How come 192bit results in 1gb and 3 gb cards?

 

For Refrence, I have a XFX 7850 I Gb 256-bit (FX-785A-ZNL4-ish)

 

newegg:http://www.newegg.com/Product/Product.aspx?Item=N82E16814150642

...ncix...

 

I'm not really 100% sure but the 256 bit means the memory bus is 256 bits wide (a bit being a 1 or 0) and the Gb/s is gigaBITS per second instead of GB/s which is gigaBYTES per second.

 

I could be wrong but I think it is something like that *starts reading*

 

The wider the memory bus the more you can feed through increasing your bandwidth, 192-bit with 1GB memory but have x-amount of bandwidth but 256-bit memory bus with 1GB memory would have more bandwidth due to the wider bus or something like that.

 

Shit I feel like a dumbass

[Vertifai]

Gb/s is amount of data per second
256 Bits is the with of the bus that data can be transferred through.

Think the amount of Bits as lanes on a highway. more lanes = more cars. and think of Gb/s as cars per second.

So if you have fewer Bits but a higher memory clock, you can have the same amount of Gb/s As a very high amount of Bits but with a lower memory clock.

BTW: The amount of Bits and Gb/s has nothing to do with how many GB of graphics memory the card has.
Edit: With "clock speed" i refer to memory clock NOT GPU clock.
Edit: changed "clock speed" to memory clock

[WoodenMarker]

[Arshdeep]

I know what you mean, I knew a lot of the info already a while back but i was starting to dought myself, thx guys

[Arshdeep]

I'm not really 100% sure but the 256 bit means the memory bus is 256 bits wide (a bit being a 1 or 0) and the Gb/s is gigaBITS per second instead of GB/s which is gigaBYTES per second.

 

I could be wrong but I think it is something like that *starts reading*

 

The wider the memory bus the more you can feed through increasing your bandwidth, 192-bit with 1GB memory but have x-amount of bandwidth but 256-bit memory bus with 1GB memory would have more bandwidth due to the wider bus or something like that.

 

Shit I feel like a dumbass

I know what you mean, thx for confirming the info, apperantly I... we were right

[Kuzma]

The general rule of thumb is 128bits per GB with the exception of amazing memory clocks (GK 110)

[Nertballs]

Its been a while and I learned more about ibm (pc) architecture and now I am doughtung my old "theories."

Please define the following terms and explain their relations.

 

Memory Bandwith:

 

for example in the forms

Gb/s

and

256 bit

 

How come 192bit results in 1gb and 3 gb cards?

 

For Refrence, I have a XFX 7850 I Gb 256-bit (FX-785A-ZNL4-ish)

 

newegg:http://www.newegg.com/Product/Product.aspx?Item=N82E16814150642

...ncix...

the best way of putting it is, that Gb/s is practically the speed your car can do (per second) and the 256 bit bus is the speed limit of the road along the way!

 

Something to remember is that GB/s =/= Gb/s. A Gb/s (Gigabit) is only 1/8th of a GB/s (Gigabyte). the 256 bit bus is usually a 256 Gbit bus, or it will allow UP TO256 Gb/s, hence the speed limit term! :D 

 

Hope this helps!

[Arshdeep]

yeah I got it, thx guys

I once read a fourm on another site, where the quetion was for celuis (2*3+5), the fourm was closed and ended at the discusiona and arguement between a 6yo and a elder in community center saying wheather green is better then yellow. Keep up this fourm, It Has been Very Helpful

[Arshdeep]

256bit is also how wide the neck of the bottle is, the wider it is the more data can go thru it per second.