Home GPU Comparison NVIDIA GeForce GT 640 OEM Rebrand vs AMD Radeon R7 265

NVIDIA GeForce GT 640 OEM Rebrand vs AMD Radeon R7 265

We compared two Desktop platform GPUs: 1536MB VRAM GeForce GT 640 OEM Rebrand and 2GB VRAM Radeon R7 265 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 OEM Rebrand 's Advantages
Lower TDP (75W vs 150W)
AMD Radeon R7 265 's Advantages
Released 1 years and 10 months late
Boost Clock925MHz
More VRAM (2GB vs 1536GB)
Larger VRAM bandwidth (179.2GB/s vs 38.40GB/s)
880 additional rendering cores

Score

Benchmark

FP32 (float)
GeForce GT 640 OEM Rebrand
0.415 TFLOPS
Radeon R7 265 +356%
1.894 TFLOPS
VS

Graphics Card

Apr 2012
Release Date
Feb 2014
GeForce 600
Generation
Volcanic Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16

Clock Speeds

-
Base Clock
900 MHz
-
Boost Clock
925 MHz
800 MHz
Memory Clock
1400 MHz

Memory

1536MB
Memory Size
2GB
DDR3
Memory Type
GDDR5
192bit
Memory Bus
256bit
38.40GB/s
Bandwidth
179.2GB/s

Render Config

-
Compute Units
16
3
SM Count
-
144
Shading Units
1024
24
TMUs
64
24
ROPs
32
-
-
-
-
-
-
64 KB (per SM)
L1 Cache
16 KB (per CU)
384 KB
L2 Cache
512 KB
-
-
-

Theoretical Performance

4.320 GPixel/s
Pixel Rate
29.60 GPixel/s
17.28 GTexel/s
Texture Rate
59.20 GTexel/s
-
-
-
414.7 GFLOPS
FP32 (float)
1.894 TFLOPS
34.56 GFLOPS
FP64 (double)
118.4 GFLOPS

Board Design

75W
TDP
150W
250 W
Suggested PSU
450 W
2x DVI 1x mini-HDMI 1.3a
Outputs
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
None
Power Connectors
1x 6-pin

Graphics Processor

GF116
GPU Name
Pitcairn
GF116-150-A1
GPU Variant
Pitcairn PRO (215-0828062)
Fermi 2.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
40 nm
Process Size
28 nm
1.17 billion
Transistors
2.8 billion
238 mm²
Die Size
212 mm²

Graphics Features

12 (11_0)
DirectX
12 (11_1)
4.6
OpenGL
4.6
1.1
OpenCL
1.2
N/A
Vulkan
1.2
2.1
CUDA
-
5.1
Shader Model
5.1

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