GeForce GT 640 Rev. 2 vs Quadro FX 3800

Place in the ranking	866	722
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.06	0.19
Power efficiency	1.45	5.32
Architecture	Tesla 2.0 (2007−2013)	Kepler 2.0 (2013−2015)
GPU code name	GT200B	GK208
Market segment	Workstation	Desktop
Release date	30 March 2009 (15 years ago)	29 May 2013 (11 years ago)
Launch price (MSRP)	$799	$89

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

GT 640 Rev. 2 has 217% better value for money than FX 3800.

Detailed specifications

General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores	192	384
Core clock speed	600 MHz	1046 MHz
Number of transistors	1,400 million	915 million
Manufacturing process technology	55 nm	28 nm
Power consumption (TDP)	108 Watt	49 Watt
Texture fill rate	38.40	33.47
Floating-point processing power	0.4623 TFLOPS	0.8033 TFLOPS
ROPs	16	8
TMUs	64	32

Form factor & compatibility

Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).

Interface	PCIe 2.0 x16	PCIe 2.0 x8
Length	198 mm	145 mm
Width	1-slot	1-slot
Supplementary power connectors	1x 6-pin	None

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	GDDR3	GDDR5
Maximum RAM amount	1 GB	1 GB
Memory bus width	256 Bit	64 Bit
Memory clock speed	800 MHz	1252 MHz
Memory bandwidth	51.2 GB/s	40.06 GB/s

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	1x DVI, 2x DisplayPort	1x DVI, 1x HDMI, 1x VGA
HDMI	-	+

API compatibility

List of supported 3D and general-purpose computing APIs, including their specific versions.

DirectX	11.1 (10_0)	12 (11_0)
Shader Model	4.0	5.1
OpenGL	3.3	4.6
OpenCL	1.1	1.2
Vulkan	N/A	1.1.126
CUDA	1.3	3.5

Gaming performance

Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.

Pros & cons summary

Performance score	2.14	3.55
Recency	30 March 2009	29 May 2013
Chip lithography	55 nm	28 nm
Power consumption (TDP)	108 Watt	49 Watt

GT 640 Rev. 2 has a 65.9% higher aggregate performance score, an age advantage of 4 years, a 96.4% more advanced lithography process, and 120.4% lower power consumption.

The GeForce GT 640 Rev. 2 is our recommended choice as it beats the Quadro FX 3800 in performance tests.

Be aware that Quadro FX 3800 is a workstation graphics card while GeForce GT 640 Rev. 2 is a desktop one.

Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.