ATI Radeon X800 XT vs HD 6390

Primary details

GPU architecture, market segment, value for money and other general parameters compared.

Place in the ranking	not rated	1359
Place by popularity	not in top-100	not in top-100
Power efficiency	no data	0.32
Architecture	TeraScale 2 (2009−2015)	R400 (2004−2008)
GPU code name	Redwood	R423
Market segment	Desktop	Desktop
Release date	4 July 2011 (13 years ago)	1 December 2004 (20 years ago)

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	320	no data
Core clock speed	550 MHz	500 MHz
Number of transistors	627 million	160 million
Manufacturing process technology	40 nm	130 nm
Power consumption (TDP)	39 Watt	54 Watt
Texture fill rate	8.800	8.000
Floating-point processing power	0.352 TFLOPS	no data
ROPs	8	16
TMUs	16	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 x16	PCIe 1.0 x16
Length	165 mm	no data
Width	1-slot	1-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	DDR2	GDDR3
Maximum RAM amount	1 GB	256 MB
Memory bus width	128 Bit	256 Bit
Memory clock speed	500 MHz	500 MHz
Memory bandwidth	16 GB/s	32 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	1x DVI, 1x VGA, 1x S-Video
HDMI	+	-

API compatibility

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

DirectX	11.2 (11_0)	9.0b (9_2)
Shader Model	5.0	no data
OpenGL	4.4	2.0
OpenCL	1.2	N/A
Vulkan	N/A	N/A

Pros & cons summary

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Recency	4 July 2011	1 December 2004
Maximum RAM amount	1 GB	256 MB
Chip lithography	40 nm	130 nm
Power consumption (TDP)	39 Watt	54 Watt

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