780Ti Underperforming R9 280X CrossFire in 3DMark, why??

[jasperhuang93]

Running a single monitor setup for gaming (though I have 2 monitors), saw my 3DMark FireStrike drop almost 2000 points just with the GPU swap... thought the 780Ti could keep up with the 280s in CrossFire

780Ti score: 10438
280 xfire score: 12230

My setup is as follows

- i7-4770K OC'ed to 4.00Ghz
- 16GB Corsair Vengeance (4x4GB)
- ASUS 780Ti DirectCUII OC
- Maximus VII Gene Z97

No change in cooling or case setup, found a great deal on the 780Ti, ~$400, so I figured I'd sell the 280X's before they got too cheap.. saw them drop to ~$180 over black friday.

One anomaly to note... in the results for 3DMark, though I didn't change the OC settings on my processor, the result with the 780Ti showed weird numbers

 

[Undying89]

280X is a still powerful card. Two of them as you can see beats even 780ti and almost 980. Besides that you are stuck with 3GB vram again, idk how good upgrade this was and why you did it.

 

[jasperhuang93]

Hopefully in game performance will not suffer that much in game - looking at many of the benchmarks or comparisons of 780Ti's vs 280Xs in Xfire seem to have mixed results, some games performing better with the AMD, other times the nVidia exceeding the dual cards by a significant margin...

Any idea what's going on with my processor showing a turbo clock of 2Ghz, though?

 

[renz496]

Hopefully in game performance will not suffer that much in game - looking at many of the benchmarks or comparisons of 780Ti's vs 280Xs in Xfire seem to have mixed results, some games performing better with the AMD, other times the nVidia exceeding the dual cards by a significant margin...

Any idea what's going on with my processor showing a turbo clock of 2Ghz, though?

the very benefit with going 780Ti is you don't need to deal with scaling. also with two card you need game profile for it. if there is none then the second GPU will doing nothing except consuming power. about the 2Ghz thingy it might report the wrong clock. when you see 780Ti exceeding 2 280X performance that's mean CF support might be broken for that particular application.