Diffrent Between 192 Bit,128 Bit,256 Bit And 384 Bit On Gpu

[CryptoLocker]

Please.Just Want To Know

 

[Gam3r01]

That is the interface the card runs on to transfer data.
My card runs on a 256 bit interface, some cards have large interfaces to support more Vram (384 on the 280x for example with its 3GB of Vram)
Now some cards run more efficiently compared to other models, the 960 runs 2GB on a 128 bit interface, where my older 760 has to run on a 256 bit interface for the same 2GB.

 

[Darkbreeze]

This, explains it in detail:

http://www.playtool.com/pages/vramwidth/width.html

 

[iam2thecrowe]

it usuallt applies to the video RAM, not the gpu. It is one aspect that affects the total memory bandwidth. The other is Mhz. eg. 128bit ram @ 500mhz has the same bandwidth as 256bit @250mhz. This is not the only deciding factor in gpu performance, so it is important to read through more than one benchmark/review of a particular card tested in real-wolrld gaming situations to figure out how fast it is. Just like putting a race car on a race track and timing it to see how fast it is, instead of just looking at how many KW/hp the engine produces.

 

[CryptoLocker]

Hello Guys,

Example Can I Sli With Diffrent Interface

 

[Darkbreeze]

No. GPU architecture must be identical. Same amount of memory, same memory architecture, same number and core platform, same everything. Brand is the only thing that can be different, and sometimes that might even be an issue if something isn't the same between cards. Two cards with different bit architecture cannot be used together in SLI.

 

[hotter-than-Vishera]

Hello Guys,

Example Can I Sli With Diffrent Interface

The two cards must have the same core. For example, you can only Crossfire two R9 290Xs, or two R9 295X2s, or two R9 280Xs, or two R9 285s.... They can be different specific models, though. For example, a Club3D R9 290 Royal Ace can be Crossfired with a Sapphire R9 290 Vapor-X.

Same goes for Nvidia. You can't SLI a GTX 980 with a GTX Titan X, but you could SLI a Gigabyte G1 Gaming GTX 980 Ti with an Asus Strix Direct CU III GTX 980 Ti.

The thing about running two different cards together is that sometimes they will have different clocks. If I run a G1 Gaming GTX 980 Ti, which has a clock speed of 1190MHz, in SLI with a reference GTX 980 Ti, which has a clock speed of 1000MHz, then both cards will be forced to run at 1000MHz because that is the speed of the slower card. Same applies to AMD Crossfire.

 

[Darkbreeze]

IF they have different memory bus rates or different amounts of VRAM, they will not work in SLI either. The core architecture is not the only consideration. A 4GB GTX 960 will not SLI with a 2GB GTX 960, at least, not yet. DirectX 12 may change the entire landscape.

 

[hotter-than-Vishera]

True, but you shouldn't even be buying a 4GB 960. It only has a 128-bit bus and a bit over 1000 CUDA cores. It can't support 4GB memory, it's just a marketing ploy. You should only buy cards which have the same memory as the reference card, unless the reference card had plenty of extra stream processing units or CUDA cores and can actually handle the additional memory.

 

[Darkbreeze]

It makes sense though if you decide to SLI down the road with the 960. I don't recommend BUYING two 960's for the purpose of SLI, but if you MIGHT add another one down the road due to budget restrictions, then it might make sense as the 4GB WILL be beneficial with dual cards, plus there ARE some titles that benefit from and utilize the 4GB using a single card. Not many, but some:

https://www.youtube.com/watch?v=iX_mW36BDKs