Home GPU Comparison ATI Radeon HD 4870 Mac Edition vs NVIDIA GeForce GT 640 OEM Rebrand

ATI Radeon HD 4870 Mac Edition vs NVIDIA GeForce GT 640 OEM Rebrand

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4870 Mac Edition and 1536MB VRAM GeForce GT 640 OEM Rebrand to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4870 Mac Edition 's Advantages
Larger VRAM bandwidth (108.8GB/s vs 38.40GB/s)
656 additional rendering cores
NVIDIA GeForce GT 640 OEM Rebrand 's Advantages
Released 3 years and 3 months late
More VRAM (1536GB vs 512GB)
Lower TDP (75W vs 150W)

Score

Benchmark

FP32 (float)
Radeon HD 4870 Mac Edition +189%
1.2 TFLOPS
GeForce GT 640 OEM Rebrand
0.415 TFLOPS
VS

Graphics Card

Jan 2009
Release Date
Apr 2012
Radeon R700
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x16

Clock Speeds

-
-
-
-
-
-
850 MHz
Memory Clock
800 MHz

Memory

512MB
Memory Size
1536MB
GDDR5
Memory Type
DDR3
256bit
Memory Bus
192bit
108.8GB/s
Bandwidth
38.40GB/s

Render Config

10
Compute Units
-
-
SM Count
3
800
Shading Units
144
40
TMUs
24
16
ROPs
24
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
64 KB (per SM)
256 KB
L2 Cache
384 KB
-
-
-

Theoretical Performance

12.00 GPixel/s
Pixel Rate
4.320 GPixel/s
30.00 GTexel/s
Texture Rate
17.28 GTexel/s
-
-
-
1200 GFLOPS
FP32 (float)
414.7 GFLOPS
240.0 GFLOPS
FP64 (double)
34.56 GFLOPS

Board Design

150W
TDP
75W
450 W
Suggested PSU
250 W
1x DVI 1x mini-DisplayPort 1.0
Outputs
2x DVI 1x mini-HDMI 1.3a
2x 6-pin
Power Connectors
None

Graphics Processor

RV770
GPU Name
GF116
RV770 XT Mac (215-0669080)
GPU Variant
GF116-150-A1
TeraScale
Architecture
Fermi 2.0
TSMC
Foundry
TSMC
55 nm
Process Size
40 nm
0.956 billion
Transistors
1.17 billion
256 mm²
Die Size
238 mm²

Graphics Features

10.1 (10_1)
DirectX
12 (11_0)
3.3
OpenGL
4.6
1.1
OpenCL
1.1
N/A
Vulkan
N/A
-
CUDA
2.1
4.1
Shader Model
5.1

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