Discussion in 'Videocards - AMD Radeon' started by OnnA, Jun 11, 2019.
Navi RDNA Owners Thread
Spoiler: Navi in depth Specs
Power consumption: TDP, TBP and TGP at Nvidia and AMD graphics cards recalculated with destruction of a PR slide | igorsLAB
Spoiler: The ATI
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Reserving for my thoughts on 5700 XT.
Spoiler: 5700 XT tech Specs:
- 4x Geometry Engines
- 4x ACEs
- 5x Dual-CU per ACE (20 Dual-CUs)
- 4x Schedulers per Dual-CU (80 Schedulers)
- 8x TMUs per Dual-CU (160 TMUs)
- 4x Scallar Procs per Dual-CU (80 sALUs)
- 64x ROPs
Spoiler: Comparison to Vaga 64:
- Geometry Engines ratio 1x
- TMUs ratio 0.625x
- Schedulers ratio 1.25x (1 instruction per clock instead of GCN's 1 instruction per 4 clocks)
- sALUs ratio 1.25x
- ROPs ratio 1x
- I have hard time figuring out what is going to fall this. (Is it really just 10.3B transistor GPU?)
- Change in schedulers and in move from SIMD16 to SIMD32 enables up to 2x utilization of "shaders" => 2560SP can deliver results of Vega(GCN) with up to 5120SP at same clock for usual gaming workloads.
- Change in scheduling will enable much higher fps in older (poorly threaded/coded) games
- Same changes will enable much higher utilization of everything inside CU in newer games
- Above is reason why so high clock range => TDP has to be kept in check. Modern games will utilize everything heavily, while older games will get to benefit from higher clock.
Just to add, bios are locked same style as vega was.
Very intrigued to see these in the wild. AMD's slides basically have the XT trading blows with the 1080ti at a theoretically lower power draw. IF this holds true then this card is a win for AMD even though Nvidia has faster cards that are just as good on power draw or better (but cost a frack ton more).
No word about crossfire anymore, guess its dead?
Cannot use with DX12.
Fail? (IMhO Yes)
379-500€ Mid range? -> Really?
It's Polaris replacement BTW....
Should be 299-349€
and L.Su Ed. at 399€
Spoiler: Rant about it
LDA are supported in DirectX 12, but they need to manually handled by developers. Enabling crossfire from the Radeon Settings or SLI from the Geforce control panel will set multiple compatible adapter (ie: graphics card that can be set in Crossfire or SLI mode) as a single linked display adapter (LDA) with multiple nodes (1 per GPU). DX12 also allows also developers to manage multiple LDAs (as it does with multiple single graphics card of different capabilities and manufacturer).. DX12 also expose the sharing capabilities of different LDAs hardware/driver.
So the main difference is you cannot enable Crossfire/SLI and magically see performance improvement via driver hacks like it was in many DX11/10/9 games if the game itself does not support them.
Yes, that was my point with DX12, multi GPU is "only" supported by the game itself, not the driver (plus in game tweaks).
DX12 mGPU cannot be enabled with hacks on a none compliant game.
SLI/Crossfire cannot be used at all with DX12 despite the settings wisely being utilised for mGPU.
That's why I'm saying CF, so for dx9-11 games, not expliciet Multi adapter as in dx12.
sort of, dx9-11 crossfire does work on the radeon VII, despite it not being supported, though wouldn't expect much from navi, if the new RDNA is truly divergent from gcn( like having a new ISA that is not compatible) , the software implementation of crossfire would likely need to be reworked (specfically for modes like SFR ,).
I wish crossfire were a thing in dx12 I always had crossfire. Atm I just go with one card.
Strange brigade you can use crossfire and it works really well, it has dx12 and vulkan.
Are you sure? IN that case I want to try two Vega VII's for its 16 GB Ram and 5K res.
working as of the launch driver, dunno if that has changed since then
^ I'm afraid that's only explicit multi adapter (developer enabled AFR) for dx12. Only for a handfull of titles. But it's intresting its showing crossfire in Wattman. To bad he didn't test dx9-11 games.
Ah ic my mistake
edit:upon second look, he does try apex legends, it doesnt work, but that doesnt mean no games will work, as apex legends didnt have a crossfire profile at the time, all the typical crossfire options are available in radeon settings
so I guess this will remain a mystery until someone trys it again with a proper crossfire compatible game
R9 380 -> RX 5700 Custom
Yeah, thats probably the plan.