NVIDIA GeForce GTX 1080 vs AMD Radeon HD 7990

GTX 1080 HD 7990 Difference
Title NVIDIA GeForce GTX 1080 AMD Radeon HD 7990
Price $499 $999 500 (67%)
Release Year 2016 2013 3 (0%)
Maximum Temperature 83 C 82 C 1 (1%)
Max Noise Level 51.6 dB 54.8 dB 3.2 (6%)
Minimum Power Supply 530W 725W 195 (31%)
Benchmark CPU Intel Core i7-6700K @ 4.00GHz ($334.99) Intel Core i7-3770K @ 3.50GHz ($248.98)
CPU Bottleneck FPS Loss -11.3 FPS 0 FPS 11.3 (-200%)
Benchmark Quality Settings Ultra Quality Settings Ultra Quality Settings
Average 1080p Performance 106.5 FPS 112 FPS 5.5 (5%)
Average 1440p Performance 76.9 FPS 77.4 FPS 0.5 (1%)
Average 4K Performance 44.5 FPS 45.6 FPS 1.1 (2%)
Memory 8 GB 3 GB 5 (91%)
Overall (GPU + CPU + Settings) Score 77/100 49/100 28 (44%)

Our Verdict: The price of HD 7990 is ridiculous. Upgrading from GTX 1080 to HD 7990 is not recommended as it is less than 30% of improvement in performance. In general, a reasonable upgrade is from 30%-50% or more to justify The purchase of new hardware. The price/performance ratio is much better for GTX 1080.

Game Performance (FPS) at ultra quality settings

1920x1080

Year Game Frames Per Second
2013 Crysis 3
113.6
99.6

2560x1440

Year Game Frames Per Second
2013 Battlefield 4
102.8
68
2013 Crysis 3
72.5
71.6

3840x2160

Year Game Frames Per Second
2013 Battlefield 4
74.9
49.5
2013 Crysis 3
35.8
35.2

Questions and Answers

    GTX 1080 vs HD 7990 Specifications Comparison

    Board Design

    GTX 1080 HD 7990
    Board NumberPG413 SKU 0C476
    Length10.5 inches 267 mm12.1 inches 307 mm
    Outputs1x DVI1x HDMI3x DisplayPort1x DVI4x mini-DisplayPort
    Power Connectors1x 8-pin2x 8-pin
    Slot WidthDual-slotDual-slot
    TDP180 W375 W

    Clock Speeds

    GTX 1080 HD 7990
    Boost Clock1733 MHz1000 MHz
    GPU Clock1607 MHz950 MHz
    Memory Clock1251 MHz 10008 MHz effective1500 MHz 6000 MHz effective

    Graphics Card

    GTX 1080 HD 7990
    Bus InterfacePCIe 3.0 x16PCIe 3.0 x16
    GenerationGeForce 1000Southern Islands (HD 7900)
    Launch Price599 USD999 USD
    ProductionActiveEnd-of-life
    Release DateMay 27th, 2016Apr 24th, 2013

    Graphics Features

    GTX 1080 HD 7990
    DirectX12.0 (12_1)12.0 (11_1)
    OpenCL1.21.2
    OpenGL4.64.5
    Shader Model6.15.1
    Vulkan1.1.821.1.77

    Graphics Processor

    GTX 1080 HD 7990
    ArchitecturePascalGCN 1.0
    Die Size314 mm²365 mm²
    GPU NameGP104Malta
    GPU VariantGP104-400-A1Malta XT (215-0849026)
    Process Size16 nm28 nm
    Transistors7,200 million4,313 million

    Memory

    GTX 1080 HD 7990
    Bandwidth320.3 GB/s288.0 GB/s
    Memory Bus256 bit384 bit
    Memory Size8192 MB3072 MB
    Memory TypeGDDR5XGDDR5

    Render Config

    GTX 1080 HD 7990
    ROPs6432
    Shading Units25602048
    TMUs160128

    Theoretical Performance

    GTX 1080 HD 7990
    FP32 (float) performance8,873 GFLOPS4,096 GFLOPS
    FP64 (double) performance277.3 GFLOPS (1:32)1,024 GFLOPS (1:4)
    Pixel Rate110.9 GPixel/s32.00 GPixel/s
    Texture Rate277.3 GTexel/s128.0 GTexel/s