NVIDIA GeForce GT 640 vs AMD Radeon Sky 900

VS

NVIDIA GeForce GT 640

AMD Radeon Sky 900

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 3GB VRAM Radeon Sky 900 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 's Advantages

Lower TDP (65W vs 300W)

AMD Radeon Sky 900 's Advantages

Released 9 months late

Boost Clock950MHz

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (240.0GB/s vs 28.51GB/s)

1408 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

Radeon Sky 900 +391%

3.405 TFLOPS

GeForce GT 640

VS

Radeon Sky 900

Graphics Card

Jun 2012

Release Date

Mar 2013

GeForce 600

Generation

Radeon Sky

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

825 MHz

-

Boost Clock

950 MHz

891 MHz

Memory Clock

1250 MHz

Memory

2GB

Memory Size

3GB

DDR3

Memory Type

GDDR5

128bit

Memory Bus

384bit

28.51GB/s

Bandwidth

240.0GB/s

Render Config

-

Compute Units

28

-

384

Shading Units

1792

32

TMUs

112

16

ROPs

32

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

768 KB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

30.40 GPixel/s

28.86 GTexel/s

Texture Rate

106.4 GTexel/s

-

692.7 GFLOPS

FP32 (float)

3.405 TFLOPS

28.86 GFLOPS

FP64 (double)

851.2 GFLOPS

Board Design

65W

TDP

300W

250 W

Suggested PSU

700 W

1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

Outputs

1x DVI 1x mini-DisplayPort 1.2

None

Power Connectors

2x 8-pin

Graphics Processor

GK107

GPU Name

Tahiti

GK107-300-A2

GPU Variant

Orthrus

Kepler

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.27 billion

Transistors

4.313 billion

118 mm²

Die Size

352 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

3.0

OpenCL

1.2

1.1

Vulkan

1.2

3.0

CUDA

-

5.1

Shader Model

5.1

Related GPU Comparisons

1

NVIDIA GeForce GT 640 vs NVIDIA GeForce GTX 285 Mac Edition

2

NVIDIA GeForce GT 640 vs NVIDIA P104 100

3

NVIDIA GeForce GT 640 vs ATI Radeon HD 2900 XTX

4

NVIDIA GeForce GT 640 vs AMD Radeon HD 6770

5

NVIDIA GeForce GT 640 vs AMD FirePro S9100

6

NVIDIA GeForce GT 640 vs ATI Radeon HD 4350 PCIe x1

7

NVIDIA GeForce GT 640 vs NVIDIA GeForce GT 710 OEM

8

NVIDIA GeForce GT 640 vs AMD Radeon Pro WX 8200

9

NVIDIA GeForce GT 640 vs ATI Radeon HD 2400 XT

10

NVIDIA GeForce GT 640 vs AMD Radeon RX 570

Related News

1

CPU-Z Minor Update: Support for Intel's Four New Products and New Memory

2

CXMT Reportedly Achieves 80% Yield in DDR5 Production

3

Intel Wildcat Lake Appears on Shipping List with FCBGA1516 Socket, Poised to Replace Alder Lake-N

4

The Commencement of ARM and Qualcomm Licensing Dispute Trial: Potential Major Impact on PC Market

5

NVIDIA Allegedly Equips RTX 5080 with 30Gbps Memory Speed, Other Models to Feature 28Gbps

6

Intel Reports High Return Rates for Devices Featuring Snapdragon X Series; Qualcomm Counters with 'Industry Standard' Claim

7

Intel Confirms Panther Lake Adopts 18A Process, ES0 Samples Already Sent to Customers

8

Complete Lineup of Core Ultra 200HX/H/U and Core 200H/U Revealed: 31 Models to Dazzle the Eyes

9

Amechi Unveils V1 Mini PC: Only 0.33L Volume with 150W Power Consumption

10

iPhone 17 Series Set for Major Design Overhaul: Camera Module Transformed into Sleek Strip