New
#1
Why does R9 380 perform worse than R9 280X?
PC1
PSU: BeQuiet Pure Power L7 530W
Mobo: Gigabyte Z68MA-D2H
Processor: Intel Core i5-2500K 3.30GHz (Sandybridge)
Memory: G.Skill RipJawsX 8GB (2x4GB) DDR3 PC3-12800C9 1600MHz Dual Channel Kit
GPU: Sapphire AMD Radeon R9 280X DUAL-X
OS: Windows 10
PC2
PSU: Cougar STX 650W 80 Plus Corsair 430W V2 CX Series PSU
Mobo: Asrock A75M-HVS P1.80
Processor: AMD Llano A6-3650 2.60GHz Socket FM1
Memory: Corsair Vengeance 8GB (2x4GB) DDR3 1866Mhz Memory Kit CL9 1.5V
GPU: XFX Radeon R9 380 4GB
OS: Windows 10
I ran the unigine valley benchmark for both PCs. Results:
PC1 (with R9 280X)
FPS: 67.1
Score: 2806
PC2 (with R9 380)
FPS: 40.1
Score: 1680
PC2 is bottlenecked by the CPU/mobo, I think. So I swapped the GPUs over in the PCs and here are the new results:
PC1 (with R9 380):
FPS: 63.1
Score: 2642
PC2 (with R9 280X):
FPS: 40.5
Score: 1696
I expected PC1 with the R9 380 to be much better than all the tests, but it wasn't, it was slower than the R9 280X. I was not surprised that the R9 380 in PC2 was no better than the R9 280 because it's being bottlenecked. Any ideas on why the R9 380 is so underwhelming?