Question about the Vulkan API

[Taroko]

Hi guys 

 

just wondering why the amd rx 480 that run on the DOOM Vulkan API receive such a big boost in fps, and correct me if i'm wrong but the 1070 doesn't scale at all? I know that Vulkan creator is working with AMD but i just don't know how it won't benefit the 1070 at all, again correct me if i'm wrong. Actually while on this topic is there any games in the future that support the Vulkan API announced yet?

 

Thank you,

[Godlygamer23]

Hardware Unboxed did a test and found that asynchronous compute doesn't really help AMD video cards. The big benefit to AMD cards is the low level API aspect as it gives back CPU performance and allows the GPUs to perform the way they are.

 

The reason why NVIDIA GPUs don't really benefit much right now is that NVIDIA is pretty much already at the pinnacle for driver optimization, and therefore the CPU isn't really being held back by drivers.

Video for reference:

 

[AlTech]

2 minutes ago, Taroko said:

Hi guys 

 

just wondering why the amd rx 480 that run on the DOOM Vulkan API receive such a big boost in fps, and correct me if i'm wrong but the 1070 doesn't scale at all? I know that Vulkan creator is working with AMD but i just don't know how it won't benefit the 1070 at all, again correct me if i'm wrong. Actually while on this topic is there any games in the future that support the Vulkan API announced yet?

 

Thank you,

It's due to how AMD's graphics hardware works.

 

It uses Asynchronous Compute Engines which Vulkan can take advantage of. These ACEs manage the Compute Units which make up AMD GPUs. 1 Compute Unit features 64 Stream Processors, 4 Texture mapping units and 1-2 ROPs.

 

Many Compute Units make up a GPU. The RX 480 is made up of 36 Compute Units.

 

AMD is only now finally optimizing their performance of their unique hardware.

[Godlygamer23]

1 minute ago, AluminiumTech said:

It's due to how AMD's graphics hardware works.

 

It uses Asynchronous Compute Engines which Vulkan can take advantage of. These ACEs manage the Compute Units which make up AMD GPUs. 1 Compute Unit features 64 Stream Processors, 4 Texture mapping units and 1-2 ROPs.

 

Many Compute Units make up a GPU. The RX 480 is made up of 36 Compute Units.

 

AMD is only now finally optimizing their performance of their unique hardware.

Asynchronous compute doesn't necessarily seem to be doing much for AMD hardware as the above video will show.

[AlTech]

14 minutes ago, Godlygamer23 said:

Asynchronous compute doesn't necessarily seem to be doing much for AMD hardware as the above video will show.

Yeah I just realized that. I just finished watching the video you posted.

 

There are other reasons why some AMD GPUs like the RX 480 and R9 Fury series didn't scale well to begin with.

 

Including the fact that they didn't scale the amount of ROPs from a 390 to a Fury X. It features the same 64 ROPs when in reality it should have featured 128. @DocSwag and a few others have argued this case for the RX 480 where it should have had 64 ROPs instead of 32.

 

Also, for what it's worth the RX 480 features 15% higher performance per CU over the R9 290X