Bit Bus ?

[Flawizz]

hey guys, i looked into the specs of the 2080ti and i see it has a 352bit bus, bit bus is a specification i dont know much about so i think yeah thats pretty high, but then i look at the Vega 64 and i see 2048bit bus, i was like wow, thats way more than the 2080ti, 

When looking from a gaming perspective, what benefit does this give? or is this nothing to be amazed by?

 

 

[wojtepanik]

yeah, it isn't really comperable, it is different kind of memory, ddr6 vs hbm2 

[jj9987]

How many bits can be simultaneously transferred on the bus. HBM2 memories have much wider bus compared to GDDR memories.

[Flawizz]

Just now, wojtepanik said:

yeah, it isn't really comperable, it is different kind of memory, ddr6 vs hbm2 

lets say they're the exact same gpu, one has 352bit and other has 2048 bit bus, what would i notice from this gain in gaming and outside gaming? what does this help the card with?

[GoldenLag]

for the average person it is nothing to look at. while higher bandwhitth is provided by higher bit busses you can also clock the memmory higher. 

 

the Vega 64 is also more memmory bandwhidth dependant which is why it has such a wide buss. the wide bus is not indicative of what the memmory bandwidth actually is though. Memmory clockspeed is also important and you will fine the Vega 64 memmory clocking lower than the memmory of the 2080ti, not to mention them using 2 different types of memmory. (vega 64 uses HBM2 and 2080ti uses GDDR6, HBM being more power efficient and in general offering more bendwhidth)

 

the 2080ti is the fastest card on the market. followed by the 2080/1080ti then the 2070/1080/Vega64

[i_build_nanosuits]

13 minutes ago, jj9987 said:

How many bits can be simultaneously transferred on the bus. HBM2 memories have much wider bus compared to GDDR memories.

but it has much lower clock speed...

 

19 minutes ago, Flawizz said:

hey guys, i looked into the specs of the 2080ti and i see it has a 352bit bus, bit bus is a specification i dont know much about so i think yeah thats pretty high, but then i look at the Vega 64 and i see 2048bit bus, i was like wow, thats way more than the 2080ti, 

When looking from a gaming perspective, what benefit does this give? or is this nothing to be amazed by?

memory bandwidth is the ''amount'' of data that can travel through a memory subsystem...

Bandwidth is determined by the width of the memory bus and the clockspeed of the memory.

 

Think of it as a highway...the Bus width would be how many lanes you have available on the freeway, and clockspeed would be the speed limit the cars can travel at...so the more lanes you have and the faster you can go the better right? In that sense, AMD has an extremely wide freeway with many many lanes but the cars aren't allowed to drive fast, where as the 2080ti has much less ways on it's highway but the cars travel much faster...and at the end of those highway, about the same amount of cars are reaching the exit ramp at a given time

 

TLDR, it doesn't matter lol

[jj9987]

4 hours ago, i_build_nanosuits said:

but it has much lower clock speed...

Yea, so you move less traffic on each bus.

 

Compare it like this - 2-way road with 60mph or 100km/h speed limit vs 4-way road with 30mph or 50 km/h speed limit.

[Mira Yurizaki]

4 hours ago, Flawizz said:

hey guys, i looked into the specs of the 2080ti and i see it has a 352bit bus, bit bus is a specification i dont know much about so i think yeah thats pretty high, but then i look at the Vega 64 and i see 2048bit bus, i was like wow, thats way more than the 2080ti, 

When looking from a gaming perspective, what benefit does this give? or is this nothing to be amazed by?

You have to look at what speed the memory is operating at along with how wide the memory bus is. These two values form how much data per second, or bandwidth, that can be passed between the GPU and VRAM. If you look at the specs, the RTX 2080 Ti operates at an effective clock speed of 14 GHz (1.75GHz x 8), which sounds much more impressive than Vega 64's boost clock speed of 1.677 GHz. However, the total bandwidth of the RTX 2080 Ti is something like 672 GB/sec while the total bandwidth of the Vega 64 is 484 GB/sec

 

However in the long run it doesn't matter. Memory speed requirements are dependent on how fast the GPU can crunch data. There's no point in sticking something like this onto say a GeForce GT 1030, because the GPU will never process data near the speeds that it can get it, making it a waste. It's the same reason why cities don't build 16-lane high ways for neighborhood roads.