AMD Radeon HD 8990 OEM vs NVIDIA GeForce GT 645 OEM

VS

AMD Radeon HD 8990 OEM NVIDIA GeForce GT 645 OEM

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 8990 OEM and 1024MB VRAM GeForce GT 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 8990 OEM 's Advantages

Released 1 years late

Boost Clock1000MHz

More VRAM (3GB vs 1GB)

Larger VRAM bandwidth (288.0GB/s vs 91.87GB/s)

1760 additional rendering cores

NVIDIA GeForce GT 645 OEM 's Advantages

Lower TDP (102W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 8990 OEM +358%

4.096 TFLOPS

GeForce GT 645 OEM

0.894 TFLOPS

Radeon HD 8990 OEM

VS

GeForce GT 645 OEM

Graphics Card

Apr 2013

Release Date

Apr 2012

Sea Islands

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

950 MHz

Base Clock

-

1000 MHz

Boost Clock

-

1500 MHz

Memory Clock

957 MHz

Memory

3GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

192bit

288.0GB/s

Bandwidth

91.87GB/s

Render Config

-

SM Count

6

32

Compute Units

-

2048

Shading Units

288

128

TMUs

48

32

ROPs

24

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

64 KB (per SM)

768 KB

L2 Cache

384 KB

Theoretical Performance

32.00 GPixel/s

Pixel Rate

9.312 GPixel/s

128.0 GTexel/s

Texture Rate

37.25 GTexel/s

-

FP16 (half)

-

4.096 TFLOPS

FP32 (float)

894.0 GFLOPS

1024 GFLOPS

FP64 (double)

74.50 GFLOPS

Graphics Processor

Malta

GPU Name

GF114

Malta XT (215-0849026)

GPU Variant

-

GCN 1.0

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

4.313 billion

Transistors

1.95 billion

365 mm²

Die Size

332 mm²

Board Design

375W

TDP

102W

750 W

Suggested PSU

300 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

2x DVI 1x mini-HDMI 1.3a

2x 8-pin

Power Connectors

-

Graphics Features

12 (11_1)

DirectX

12 (11_0)

4.6

OpenGL

4.6

1.2

OpenCL

1.1

1.2

Vulkan

N/A

-

CUDA

2.1

5.1

Shader Model

5.1

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