NVIDIA GeForce GT 645 OEM vs AMD Radeon HD 7770 GHz Edition

Comparative analysis of NVIDIA GeForce GT 645 OEM and AMD Radeon HD 7770 GHz Edition videocards for all known characteristics in the following categories: Essentials, Technical info, Video outputs and ports, Compatibility, dimensions and requirements, API support, Memory, Technologies. Benchmark videocards performance analysis: PassMark - G2D Mark, PassMark - G3D Mark, GFXBench 4.0 - T-Rex (Frames), GFXBench 4.0 - T-Rex (Fps), Geekbench - OpenCL, CompuBench 1.5 Desktop - Face Detection (mPixels/s), CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s), CompuBench 1.5 Desktop - T-Rex (Frames/s), CompuBench 1.5 Desktop - Video Composition (Frames/s), CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s), GFXBench 4.0 - Car Chase Offscreen (Frames), GFXBench 4.0 - Manhattan (Frames), GFXBench 4.0 - Car Chase Offscreen (Fps), GFXBench 4.0 - Manhattan (Fps), 3DMark Fire Strike - Graphics Score.

NVIDIA GeForce GT 645 OEM

AMD Radeon HD 7770 GHz Edition

Differences

Reasons to consider the NVIDIA GeForce GT 645 OEM

Videocard is newer: launch date 2 month(s) later
Around 23% lower typical power consumption: 102 Watt vs 125 Watt
3.4x more memory clock speed: 3828 MHz vs 1125 MHz

Launch date	24 April 2012 vs 15 February 2012
Thermal Design Power (TDP)	102 Watt vs 125 Watt
Memory clock speed	3828 MHz vs 1125 MHz

Reasons to consider the AMD Radeon HD 7770 GHz Edition

Around 8% higher texture fill rate: 40 GTexel / s vs 37.2 GTexel / s
2.2x more pipelines: 640 vs 288
Around 43% better floating-point performance: 1,280 gflops vs 894.0 gflops
A newer manufacturing process allows for a more powerful, yet cooler running videocard: 28 nm vs 40 nm
Around 4% better performance in PassMark - G2D Mark: 461 vs 443
Around 8% better performance in PassMark - G3D Mark: 2169 vs 2006
7.6x better performance in GFXBench 4.0 - T-Rex (Frames): 14630 vs 1914
7.6x better performance in GFXBench 4.0 - T-Rex (Fps): 14630 vs 1914

Specifications (specs)
Texture fill rate	40 GTexel / s vs 37.2 GTexel / s
Pipelines	640 vs 288
Floating-point performance	1,280 gflops vs 894.0 gflops
Manufacturing process technology	28 nm vs 40 nm
Benchmarks
PassMark - G2D Mark	461 vs 443
PassMark - G3D Mark	2169 vs 2006
GFXBench 4.0 - T-Rex (Frames)	14630 vs 1914
GFXBench 4.0 - T-Rex (Fps)	14630 vs 1914

Compare benchmarks

GPU 1: NVIDIA GeForce GT 645 OEM
GPU 2: AMD Radeon HD 7770 GHz Edition

PassMark - G2D Mark

GPU 1

GPU 2

443

461

PassMark - G3D Mark

GPU 1

GPU 2

2006

2169

GFXBench 4.0 - T-Rex (Frames)

GPU 1

GPU 2

1914

14630

GFXBench 4.0 - T-Rex (Fps)

GPU 1

GPU 2

1914

14630

Name	NVIDIA GeForce GT 645 OEM	AMD Radeon HD 7770 GHz Edition
PassMark - G2D Mark	443	461
PassMark - G3D Mark	2006	2169
GFXBench 4.0 - T-Rex (Frames)	1914	14630
GFXBench 4.0 - T-Rex (Fps)	1914	14630
Geekbench - OpenCL		14263
CompuBench 1.5 Desktop - Face Detection (mPixels/s)		33.836
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)		506.712
CompuBench 1.5 Desktop - T-Rex (Frames/s)		3.01
CompuBench 1.5 Desktop - Video Composition (Frames/s)		49.787
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)		153.657
GFXBench 4.0 - Car Chase Offscreen (Frames)		3707
GFXBench 4.0 - Manhattan (Frames)		4524
GFXBench 4.0 - Car Chase Offscreen (Fps)		3707
GFXBench 4.0 - Manhattan (Fps)		4524
3DMark Fire Strike - Graphics Score		711

Compare specifications (specs)

	NVIDIA GeForce GT 645 OEM	AMD Radeon HD 7770 GHz Edition
Essentials
Architecture	Fermi 2.0	GCN 1.0
Code name	GF114	Cape Verde
Launch date	24 April 2012	15 February 2012
Place in performance rating	557	558
Type	Desktop	Desktop
Design		AMD Radeon HD 7000 Series
Launch price (MSRP)		$159
Technical info
Core clock speed	776 MHz
Floating-point performance	894.0 gflops	1,280 gflops
Manufacturing process technology	40 nm	28 nm
Pipelines	288	640
Texture fill rate	37.2 GTexel / s	40 GTexel / s
Thermal Design Power (TDP)	102 Watt	125 Watt
Transistor count	1,950 million	1,500 million
Boost clock speed		1000 MHz
Stream Processors		640
Video outputs and ports
Display Connectors	2x DVI, 1x mini-HDMI	1x DVI, 1x HDMI, 2x mini-DisplayPort
DisplayPort support
Dual-link DVI support
Eyefinity
HDMI
VGA
Compatibility, dimensions and requirements
Interface	PCIe 2.0 x16	PCIe 3.0 x16
Length	210 mm	210 mm
Bus support		PCIe 2.1 x16
Supplementary power connectors		1x 6-pin
API support
DirectX	12.0 (11_0)	11
OpenGL	4.6	4.5
Memory
Maximum RAM amount	1 GB	1 GB
Memory bandwidth	91.9 GB / s	72 GB/s
Memory bus width	192 Bit	128 Bit
Memory clock speed	3828 MHz	1125 MHz
Memory type	GDDR5	GDDR5
Technologies
AMD Eyefinity
CrossFire
FreeSync