ATI Radeon X1900 CrossFire Edition vs GeForce GT 640 Rev. 2

Place in the ranking	724	1285
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.19	no data
Power efficiency	4.96	0.25
Architecture	Kepler 2.0 (2013−2015)	R500 (2005−2007)
GPU code name	GK208	R580
Market segment	Desktop	Desktop
Release date	29 May 2013 (11 years ago)	24 January 2006 (18 years ago)
Launch price (MSRP)	$89	no data

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

no data

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	384	no data
Core clock speed	1046 MHz	625 MHz
Number of transistors	915 million	384 million
Manufacturing process technology	28 nm	90 nm
Power consumption (TDP)	49 Watt	100 Watt
Texture fill rate	33.47	10.00
Floating-point processing power	0.8033 TFLOPS	no data
ROPs	8	16
TMUs	32	16

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 x8	PCIe 1.0 x16
Length	145 mm	no data
Width	1-slot	2-slot
Supplementary power connectors	None	1x 6-pin

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	GDDR3
Maximum RAM amount	1 GB	512 MB
Memory bus width	64 Bit	256 Bit
Memory clock speed	1252 MHz	725 MHz
Memory bandwidth	40.06 GB/s	46.4 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, 1x HDMI, 1x VGA	2x DVI, 1x S-Video
HDMI	+	-

API compatibility

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

DirectX	12 (11_0)	9.0c (9_3)
Shader Model	5.1	3.0
OpenGL	4.6	2.0
OpenCL	1.2	N/A
Vulkan	1.1.126	N/A
CUDA	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	3.55	0.36
Recency	29 May 2013	24 January 2006
Maximum RAM amount	1 GB	512 MB
Chip lithography	28 nm	90 nm
Power consumption (TDP)	49 Watt	100 Watt

GT 640 Rev. 2 has a 886.1% higher aggregate performance score, an age advantage of 7 years, a 100% higher maximum VRAM amount, a 221.4% more advanced lithography process, and 104.1% lower power consumption.

The GeForce GT 640 Rev. 2 is our recommended choice as it beats the Radeon X1900 CrossFire Edition in performance tests.

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