AMD Radeon HD 7990 vs NVIDIA T400

VS

AMD Radeon HD 7990

NVIDIA T400

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7990 and 2GB VRAM T400 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7990 's Advantages

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (288.0GB/s vs 80.00GB/s)

1664 additional rendering cores

NVIDIA T400 's Advantages

Released 8 years and 1 months late

Boost Clock has increased by 42% (1425MHz vs 1000MHz)

Lower TDP (30W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 7990 +274%

4.096 TFLOPS

T400

1.094 TFLOPS

Radeon HD 7990

VS

T400

Graphics Card

Apr 2013

Release Date

May 2021

Southern Islands

Generation

Quadro

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

950 MHz

Base Clock

420 MHz

1000 MHz

Boost Clock

1425 MHz

1500 MHz

Memory Clock

1250 MHz

Memory

3GB

Memory Size

2GB

GDDR5

Memory Type

GDDR6

384bit

Memory Bus

64bit

288.0GB/s

Bandwidth

80.00GB/s

Render Config

32

Compute Units

-

SM Count

6

2048

Shading Units

384

128

TMUs

24

32

ROPs

16

-

16 KB (per CU)

L1 Cache

64 KB (per SM)

768 KB

L2 Cache

1024 KB

-

Theoretical Performance

32.00 GPixel/s

Pixel Rate

22.80 GPixel/s

128.0 GTexel/s

Texture Rate

34.20 GTexel/s

-

FP16 (half)

2.189 TFLOPS

4.096 TFLOPS

FP32 (float)

1094 GFLOPS

1024 GFLOPS

FP64 (double)

34.20 GFLOPS

Board Design

375W

TDP

30W

750 W

Suggested PSU

200 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

3x mini-DisplayPort 1.4a

2x 8-pin

Power Connectors

None

Graphics Processor

Malta

GPU Name

TU117

Malta XT (215-0849026)

GPU Variant

-

GCN 1.0

Architecture

Turing

TSMC

Foundry

TSMC

28 nm

Process Size

12 nm

4.313 billion

Transistors

4.7 billion

365 mm²

Die Size

200 mm²

Graphics Features

12 (11_1)

DirectX

12 (12_1)

4.6

OpenGL

4.6

1.2

OpenCL

3.0

1.2

Vulkan

1.3

-

CUDA

7.5

5.1

Shader Model

6.6

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