ATI Radeon HD 2900 XTX vs ATI HD 3870

Primary details

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

Place in the ranking	1046	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.05	no data
Power efficiency	0.94	no data
Architecture	TeraScale (2005−2013)	TeraScale (2005−2013)
GPU code name	RV670	R600
Market segment	Desktop	Desktop
Release date	19 November 2007 (17 years ago)	no data
Launch price (MSRP)	$269	no data

Cost-effectiveness evaluation

The higher the performance-to-price ratio, the better. We use the manufacturer's recommended prices for comparison.

Performance to price scatter graph

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	320
Core clock speed	777 MHz	743 MHz
Number of transistors	666 million	720 million
Manufacturing process technology	55 nm	80 nm
Power consumption (TDP)	106 Watt	240 Watt
Texture fill rate	12.43	11.89
Floating-point processing power	0.4973 TFLOPS	no data
ROPs	16	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	241 mm	315 mm
Width	2-slot	2-slot
Supplementary power connectors	1x 6-pin	2x 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	GDDR4	GDDR3
Maximum RAM amount	512 MB	512 MB
Memory bus width	256 Bit	512 Bit
Memory clock speed	1126 MHz	1656 MBps
Memory bandwidth	72.06 GB/s	106.0 GB/s

Connectivity and outputs

This section shows the types and number of video connectors on each GPU. The data applies specifically to desktop reference models (for example, NVIDIA’s Founders Edition). OEM partners often modify both the number and types of ports. On notebook GPUs, video‐output options are determined by the laptop’s design rather than the graphics chip itself.

Display Connectors

2x DVI, 1x S-Video

2x DVI, 1x S-Video

API and SDK compatibility

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

DirectX	10.1 (10_1)	10.0 (10_0)
Shader Model	4.1	4.0
OpenGL	3.3	3.3 (full) 4.0 (partial)
OpenCL	N/A	N/A
Vulkan	N/A	N/A

Pros & cons summary

---

Chip lithography	55 nm	80 nm
Power consumption (TDP)	106 Watt	240 Watt

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite graphics card.

---