GeForce GT 640M vs GTX 770

Place in performance ranking	325	807
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.62	0.23
Architecture	Kepler (2012−2018)	Kepler (2012−2018)
GPU code name	GK104	N13P-GS
Market segment	Desktop	Laptop
Release date	30 May 2013 (11 years ago)	22 March 2012 (12 years ago)
Launch price (MSRP)	$399	no data
Current price	$254 (0.6x MSRP)	$310

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

GTX 770 has 1474% better value for money than GT 640M.

Detailed specifications

General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores	1536	384
CUDA cores	1536	384
Core clock speed	1046 MHz	Up to 625 MHz
Boost clock speed	1085 MHz	645 MHz
Number of transistors	3,540 million	1,270 million
Manufacturing process technology	28 nm	28 nm
Power consumption (TDP)	230 Watt	32 Watt
Maximum GPU temperature	98 °C	no data
Texture fill rate	134 billion/sec	Up to 20.0 billion/sec
Floating-point performance	3,333 gflops	480.0 gflops

Form factor & compatibility

Information on GeForce GTX 770 and GeForce GT 640M compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop video cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility). For notebook video cards it's notebook size, connection slot and bus, if the video card is inserted into a slot instead of being soldered to the notebook motherboard.

Laptop size	no data	medium sized
Bus support	PCI Express 3.0	PCI Express 2.0, PCI Express 3.0
Interface	PCIe 3.0 x16	PCIe 3.0 x16
Length	10.5" (26.7 cm)	no data
Height	4.376" (11.1 cm)	no data
Width	2-slot	no data
Minimum recommended system power	600 Watt	no data
Supplementary power connectors	One 8-pin and one 6-pin	no data

VRAM capacity and type

Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.

Memory type	GDDR5	DDR3\GDDR5
Maximum RAM amount	2 GB	2 GB
Memory bus width	256 Bit	128bit
Memory clock speed	7012 MHz	1800 - 4000 MHz
Memory bandwidth	224.3 GB/s	Up to 64.0 GB/s
Shared memory	no data	-

Connectivity and outputs

Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.

Display Connectors	One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort	No outputs
Multi monitor support	4 displays	no data
HDMI	+	+
HDCP	+	+
Maximum VGA resolution	2048x1536	Up to 2048x1536
Audio input for HDMI	Internal	no data

Supported technologies

Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.

3D Blu-Ray	no data	+
Blu Ray 3D	+	no data
3D Gaming	+	no data
3D Vision	+	no data
PhysX	+	no data
Optimus	no data	+
3D Vision Live	+	no data

API compatibility

List of supported graphics and general-purpose computing APIs, including their specific versions.

DirectX	12 (11_0)	12 API
Shader Model	5.1	5.1
OpenGL	4.3	4.5
OpenCL	1.2	1.1
Vulkan	1.1.126	1.1.126
CUDA	+	+

Synthetic benchmark performance

Non-gaming benchmark performance comparison. The combined score is measured on a 0-100 point scale.

Combined synthetic benchmark score

This is our combined benchmark performance score. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

GTX 770 15.34
+550%

GT 640M 2.36

GTX 770 outperforms GT 640M by 550% based on our aggregate benchmark results.

Passmark

This is the most ubiquitous GPU benchmark, part of Passmark PerformanceTest suite. It gives the graphics card a thorough evaluation under various types of load, providing four separate benchmarks for Direct3D versions 9, 10, 11 and 12 (the last being done in 4K resolution if possible), and few more tests engaging DirectCompute capabilities.

Benchmark coverage: 25%

GTX 770 5931
+549%

GT 640M 914

GTX 770 outperforms GT 640M by 549% in Passmark.

3DMark Fire Strike Graphics

Fire Strike is a DirectX 11 benchmark for gaming PCs. It features two separate tests displaying a fight between a humanoid and a fiery creature made of lava. Using 1920x1080 resolution, Fire Strike shows off some realistic graphics and is quite taxing on hardware.

Benchmark coverage: 14%

GTX 770 8150
+565%

GT 640M 1225

GTX 770 outperforms GT 640M by 565% in 3DMark Fire Strike Graphics.

GeekBench 5 OpenCL

Geekbench 5 is a widespread graphics card benchmark combined from 11 different test scenarios. All these scenarios rely on direct usage of GPU's processing power, no 3D rendering is involved. This variation uses OpenCL API by Khronos Group.

Benchmark coverage: 9%

GTX 770 18382
+475%

GT 640M 3197

GTX 770 outperforms GT 640M by 475% in GeekBench 5 OpenCL.

GeekBench 5 Vulkan

Benchmark coverage: 5%

GTX 770 17057
+524%

GT 640M 2732

GTX 770 outperforms GT 640M by 524% in GeekBench 5 Vulkan.

GeekBench 5 CUDA

Benchmark coverage: 4%

GTX 770 13785
+527%

GT 640M 2200

GTX 770 outperforms GT 640M by 527% in GeekBench 5 CUDA.

Octane Render OctaneBench

This is a special benchmark measuring graphics card performance in OctaneRender, which is a realistic GPU rendering engine by OTOY Inc., available either as a standalone program, or as a plugin for 3DS Max, Cinema 4D and many other apps. It renders four different static scenes, then compares render times with a reference GPU which is currently GeForce GTX 980. This benchmark has nothing to do with gaming and is aimed at professional 3D graphics artists.

Benchmark coverage: 4%

GTX 770 57
+533%

GT 640M 9

GTX 770 outperforms GT 640M by 533% in Octane Render OctaneBench.