AMD R3xx series

m0LN4r je 22. avg 2015 ob 11:43 izjavil:

Pa kaki bios človek, kartica ni moja last in je še pod garancijo. In ti misliš, da 8gbgddr5 rabi isto štroma kot 4, kako že?

m0LN4r je 22. avg 2015 ob 12:06 izjavil:

Nisem vedel, torej je tut thermal dissipation ločen?

D3m0r4l1z3d je 24. avg 2015 ob 22:11 izjavil:

markic222 je 24. avg 2015 ob 21:33 izjavil:

@Senitel

Sklepal sem po tem, da mu še nihče v temi ni uspel dokazati nasprotno njegovemu mnenju. Zanimivo bi bilo videti njegov odgovor na to kar si ti tukaj podal. Kot sem napisal, žal nimam dovolj znanja da bi si lahko ustvaril lastno mnenje kdo ima prav, mi pa kot laiku njegovi argumenti delujejo ok in logični.

Torej so njegovi sklepi napačni in razlage zavajujoče? Toliko da vemo :)

problem, ker ti mora nekdo drug povedat ali ima prav ali ne in potem si spet na začetku, kot si tako kot marsikateri tukaj sam ugotovil, da nimaš dovolj znanja; verjetno ga ima Senitel še največ in potem spet komu tukaj verjeti, bi bilo res zanimivo videti njegov odgovor na Senitelovo kritiko

sicer pa je ravno bistvo Fanboyizma, da nimajo dovolj pojma o sami tehnologiji, le preusmerjajo svoje frustracije na mešanje navideznih štren stručkotom, ki jih s tem samo še spodbujajo k novim izmišljotinam

še največja zabloda pa je, da naslov teme in/ali lastništvo določene grafične pomeni avtomatsko zagovarjanje "svoje" tehnologije na vsak način

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Hi xxxxxxxxx,

Thanks for your interest in the Ashes of the Singularity benchmark.

In order to get an accurate picture of how well a given CPU will perform, it's important to look at the CPU Frame rate with Infinite GPU on and off ( a check box exists on the benchmark settings panel ). Note, while on, you may see some graphical corruption due to use of async shaders, however the results will be valid.

With Infinite GPU, you should see %90+ workload on your CPU. In this mode, we do not "wait" in the case where the GPU is still busy. You should see excellent scaling between 4-16 thread machines.This can only be tracked on DX12.

Without Infinite GPU, the CPU will "Wait" on a signal from the GPU that the ready to process another frame. During this wait, the CPU tends to power down when there isn't any additional work to do and effectively serializes a portion of the frame. This serialization is what causes the CPU frame rate discrepancy between Infinite GPU on and off.

In addition, due to this "wait", one interesting stat to track is your power draw. On DX11 the power draw tends to be much higher than on DX12, as the additional serial threads that the driver needs to process the GPU commands effectively forces the CPU to be active even if it is only using a fraction of it's cores. This tends to be an overlooked benefit to DX12 since the API is designed so that engines can evenly distribute work.


Regarding specific CPU workloads and the differences between AMD and Intel it will be important to note a few things.

1. We have heavily invested in SSE ( mostly 2 for compatibility reasons ) and a significant portion of the engine is executing that code during the benchmark. It could very well be 40% of the frame. Possibly more.

2. While we do have large contiguous blocks of SSE code ( mainly in our simulations ) it is also rather heavily woven into the entire game via our math libraries. Our AI and gameplay code tend to be very math heavy.

3. The Nitrous engine is designed to be data oriented ( basically we know what memory we need and when ). Because of this, we can effectively utilize the SSE streaming memory instructions in conjunction with prefetch ( both temporal and non temporal ). In addition, because our memory accesses are more predictable the hardware prefetcher tends to be better utilized.

4. Memory bandwidth is definitely something to consider. The larger the scope of the application, paired with going highly parallel puts a lot of pressure on the Memory System. On my i7 3770s i'm hitting close to peak bandwith on 40% of the frame.


I hope this information helps point you in the right direction for your investigation into the performance differences between AMD and Intel. We haven't done exhaustive comparative tests, but generally speaking we have found AMD chips to compare more favorably to Intel than what is displayed via synthetic benchmarks. I'm looking forward to your results.

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n DX11 the power draw tends to be much higher than on DX12, as the additional serial threads that the driver needs to process the GPU commands effectively forces the CPU to be active even if it is only using a fraction of it's cores.

gddr85 je 25. avg 2015 ob 16:35 izjavil:

če bo ista cena kot fury, potem spet vprašanje kdo bi to kupil, torej nekako ne more/sme bit...