AMD Radeon RX 7900 XTX vs AMD Radeon HD 8990 OEM

VS

AMD Radeon RX 7900 XTX

AMD Radeon HD 8990 OEM

We compared two Desktop platform GPUs: 24GB VRAM Radeon RX 7900 XTX and 3GB VRAM Radeon HD 8990 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 7900 XTX 's Advantages

Released 9 years and 7 months late

Boost Clock has increased by 150% (2498MHz vs 1000MHz)

More VRAM (24GB vs 3GB)

Larger VRAM bandwidth (960.0GB/s vs 288.0GB/s)

4096 additional rendering cores

Lower TDP (355W vs 375W)

Score

Benchmark

FP32 (float)

Radeon RX 7900 XTX +1398%

61.39 TFLOPS

Radeon HD 8990 OEM

4.096 TFLOPS

Radeon RX 7900 XTX

VS

Radeon HD 8990 OEM

Graphics Card

Nov 2022

Release Date

Apr 2013

Navi III

Generation

Sea Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1929 MHz

Base Clock

950 MHz

2498 MHz

Boost Clock

1000 MHz

2500 MHz

Memory Clock

1500 MHz

Memory

24GB

Memory Size

3GB

GDDR6

Memory Type

GDDR5

384bit

Memory Bus

384bit

960.0GB/s

Bandwidth

288.0GB/s

Render Config

96

Compute Units

32

-

6144

Shading Units

2048

384

TMUs

128

192

ROPs

32

-

96

RT Cores

-

256 KB per Array

L1 Cache

16 KB (per CU)

6 MB

L2 Cache

768 KB

96 MB

L3 Cache

-

Theoretical Performance

479.6 GPixel/s

Pixel Rate

32.00 GPixel/s

959.2 GTexel/s

Texture Rate

128.0 GTexel/s

122.8 TFLOPS

FP16 (half)

-

61.39 TFLOPS

FP32 (float)

4.096 TFLOPS

1.918 TFLOPS

FP64 (double)

1024 GFLOPS

Board Design

355W

TDP

375W

750 W

Suggested PSU

750 W

1x HDMI 2.1a 2x DisplayPort 2.1 1x USB Type-C

Outputs

1x DVI 4x mini-DisplayPort 1.2

2x 8-pin

Power Connectors

2x 8-pin

Graphics Processor

Navi 31

GPU Name

Malta

Navi 31 XTX (215-145000146)

GPU Variant

Malta XT (215-0849026)

RDNA 3.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

5 nm

Process Size

28 nm

57.7 billion

Transistors

4.313 billion

529 mm²

Die Size

365 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.2

OpenCL

1.2

1.3

Vulkan

1.2

-

6.7

Shader Model

5.1

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