The RX 480, Whats wrong with the Tflops?

[SEPH]

Ok so i might be doing smthing rly stupid writing this but i just don't get it. The RX 480 has 5.833 Tflops of compute at stock boost clocks (1266Mhz), the r9 390 has 5.1 Tflops of compute at its stock clock of 1Ghz, lets give it a little boost to 1100Mhz, that takes it to 5.6 Tflops. So what i dont get is how the 390 is outpreforming the RX 480 when the 480 is a card based on a newer itteration of GCN (AMD claims 15% improved IPC, that should easily make up for those 256 cores missing form the 480 even if its more like 10% better IPC) with faster clocks and whatnot. I will also add that the OC to 1350Mhz on the RX 480 takes it to 6.22 Tflops and even that doesn't beat the 390's 5.8 Tflops (with OC). So i am just a bit lost in this, the r9 390X has 5.8 Tflops so what the hell, It's probably drivers or smthing but to me thats a big gap for drivers especially considering the fact that It's still GCN. Do any of you guys have any ideas as to why this is happening? Anyway, waiting for the custom coolers maybe things will become more transparent when those arrive to market. 

[TheRandomness]

tFlops isn't everything. Also, the 480 still needs it's drivers to mature. 

[Stefan1024]

The card is not fully utilized, that's why it's to slow compared to it's raw performance. Just look at the TFlops of the 970 or 1070 and compare that to the FPS in games.

[HKZeroFive]

You can't use TFlops to determine performance. That's evident when you compare the Fury X with the GTX 980Ti.

[SEPH]

10 minutes ago, HKZeroFive said:

You can't use TFlops to determine performance. That's evident when you compare the Fury X with the GTX 980Ti.

i know but the thing is this isn't AMD vs. Nvidia its AMD vs. AMD and GCN vs. GCN albeit different itterations and the newer version with the higher Tflops is losing??? like wtf

[HKZeroFive]

26 minutes ago, SEPH said:

i know but the thing is this isn't AMD vs. Nvidia its AMD vs. AMD and GCN vs. GCN albeit different itterations and the newer version with the higher Tflops is losing??? like wtf

It's a very common misconception.

 

TFlops isn't a measure of gaming performance. Made even more so by the number of other variables. It's a measure of peak compute power.

 

Think of it as comparing the clockspeeds of different CPUs. It's utterly useless in determining relative performance.

[DXMember]

teraflops if the theoretical peak compute performance, drivers have not matured yet, more performance is to be expected from that card with newer drivers

as evidenced by the promisse to considerably boost GTA V performance on RX 480 and all GCN 1.1 and up cards with upcomming updates

 

theoretical peak compute performance means that with perfect software that is the absolute maximum number of floating point operations you can achieve per second, it's a good measure to evaluate the efficiency of software, it's mostly pretty easy to get around 50~70% of the performance you can push it to 90% with very clever software, going above that is insanely expensive and doesn't really pay off for the effort, 100% theoretical performance is very rarely if ever achieved