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Welcome back Asynchronous Compute Queues (GCN 1.0)

shankly1985

shankly1985

shankly1985

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As we predicted some time ago, AMD has finally restored the Asynchronous Compute Queues feature in Catalyst driver for GCN 1.0 GPUs.



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Though it did not improve at all the performance in the AMD modified D3D12nBodyGravity sample, looks like last drivers (17.2.1) re-enabled async-compute for GCN1 GPUs. Not sure how much will impact games (Currently my 280 is used as slave gpus for non-game applications), but at least this should cause less problem to developers.

Here's a shot by GPU View, as you can see, the compute queue is back and runs in concurrency with the default queue. Please note that some flip and presentation issues are caused since the GCN1 GPU does not directly output to the monitor (which is controlled by a R9 380X, a GCN3 GPU) and all is handled by WDDM magic.
http://www.bitsandchips.it/52-english-news/8053-welcome-back-asynchronous-compute-queues-gcn-1-0

http://forums.guru3d.com/showpost.php?p=5393835&postcount=101
 
It was a tricky bug to fix so it took a while, but it's been fixed and Async should now work on all apps that use the feature.
 
I'd better download the latest drivers pretty soon! I'm playing Total War Warhammer at the moment which I believe uses this functionality, and it certainly is a bit slow on higher settings on my 7950 at the moment!

This may give me a nice little boost! Will have to do a run of the ingame benchmark 'before and after'.
 
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Asa said:
Don't suppose that means aynchronous time/space warp will be available on older cards?
Click to expand...
Pre GCN cards aren't designed for asynchronous compute are they?

Guess it gives me a reason to upgrade my drivers. It's been like what, 6 years since I had this card? Some crazy support AMD :p.
 
Lol I'm on my second one
Had a VTX 7950 years ago, have had a run of 7850/7850 Crossfire/R9 290 since then, and then I sold my R9 290 last year. The RX480 wasn't quite fast enough for me to get (had one on order but cancelled) and waiting for something new, now hopefully with a complete system rebuild :)
 
Orcvader said:
Pre GCN cards aren't designed for asynchronous compute are they?

Guess it gives me a reason to upgrade my drivers. It's been like what, 6 years since I had this card? Some crazy support AMD :p.
Click to expand...

Sorry for resurrecting a relatively old thread. Went on holiday immediately after asking the question.

I have an R9-295x-2 in the PC i use with my Rift, so it does support async compute to some degree but not the (highly desirable) VR features. AMD haven't really been very clear about whether it is ever going to so I don't have high expectations, but figured it was worth asking.

it's a shame because a 295x-2 with a freesync monitor is still pretty formidable, but the lack of these particular features (and extremely limited mGPU VR content) mean it isn't really viable, but I have no appetite to swap down to a 480.
 
IIRC some of the new VR tech requires new hardware and is only available on Polaris (or Pascal) cards and newer when available.
 
Asa said:
Sorry for resurrecting a relatively old thread. Went on holiday immediately after asking the question.

I have an R9-295x-2 in the PC i use with my Rift, so it does support async compute to some degree but not the (highly desirable) VR features. AMD haven't really been very clear about whether it is ever going to so I don't have high expectations, but figured it was worth asking.

it's a shame because a 295x-2 with a freesync monitor is still pretty formidable, but the lack of these particular features (and extremely limited mGPU VR content) mean it isn't really viable, but I have no appetite to swap down to a 480.
Click to expand...

I would personally hold on for Vega as it looks to be a full next Gen architecture from AMD. I would then buy the best Vega card that you can. Multi gpu ain't worth it atm.
 
Does this affect R9 270s or are they too old? I am reluctant to upgrade to 17.x.x because last time I did that, I got really nasty flickering whilst in the Windows desktop at 60 Hz.
 
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