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ATI Radeon HD 5950

Hemlock x2
Graphics Processor
1440 x2
Cores
72 x2
TMUs
32 x2
ROPs
1024 MB x2
Memory Size
GDDR5
Memory Type
256 bit x2
Bus Width
ATI Radeon HD 5950 Photo ATI Hemlock Photo
The Radeon HD 5950 was a graphics card by ATI, launched in January 2009. Built on the 40 nm process, and based on the Hemlock graphics processor, in its Hemlock PRO variant, the card supports DirectX 11.2. The Hemlock graphics processor is a large chip with a die area of 334 mm² and 2,154 million transistors. Unlike the fully unlocked Radeon HD 5970, which uses the same GPU but has all 1600 shaders enabled, ATI has disabled some shading units on the Radeon HD 5950 to reach the product's target shader count. Radeon HD 5950 combines two graphics processors to increase performance. It features 1440 shading units, 72 texture mapping units and 32 ROPs per GPU. ATI has placed 2,048 MB GDDR5 memory on the card, which are connected using a 256-bit memory interface per GPU (each GPU manages 1,024 MB). The GPU is operating at a frequency of 725 MHz, memory is running at 1000 MHz.
Being a dual-slot card, the ATI Radeon HD 5950 draws power from 1x 6-pin + 1x 8-pin power connectors, with power draw rated at 302 W maximum. Display outputs include: 2x DVI, 1x HDMI, 1x DisplayPort. Radeon HD 5950 is connected to the rest of the system using a PCI-Express 2.0 x16 interface. The card measures 279 mm in length, and features a dual-slot cooling solution.

Graphics Processor

GPU Name
Hemlock
GPU Variant
Hemlock PRO
Architecture
TeraScale 2
Process Size
40 nm
Transistors
2,154 million
Die Size
334 mm²

Graphics Card

Release Date
Never Released
Generation
ATI Evergreen HD 5900
Production Status
End-of-life
Bus Interface
PCIe 2.0 x16

Relative Performance

4%
5%
6%
8%
9%
9%
12%
15%
16%
17%
18%
18%
21%
22%
24%
25%
26%
26%
28%
30%
30%
31%
32%
37%
37%
38%
38%
38%
39%
39%
41%
44%
44%
46%
46%
47%
47%
47%
47%
48%
51%
52%
55%
56%
56%
59%
59%
61%
65%
67%
68%
69%
69%
72%
72%
73%
74%
78%
79%
80%
80%
81%
81%
87%
88%
90%
91%
92%
93%
93%
94%
95%
97%
100%
Radeon HD 5950
105%
107%
110%
111%
112%
113%
116%
119%
121%
124%
126%
126%
140%
154%
156%
166%
167%
170%
172%
173%
174%
175%
177%
177%
180%
193%
196%
196%
198%
217%
222%
232%
239%
263%
272%
297%
297%
309%
362%
371%
Based on TPU review data: "Performance Summary" at 1920x1080
Performance estimated based on architecture, shader count and clocks.

Clock Speeds

GPU Clock
725 MHz
Memory Clock
1000 MHz
4000 MHz effective

Memory

Memory Size
1024 MB
Memory Type
GDDR5
Memory Bus
256 bit
Bandwidth
128.0 GB/s

Render Config

Shading Units
1440
TMUs
72
ROPs
32
Compute Units
18

Theoretical Performance

Pixel Rate
23.20 GPixel/s
Texture Rate
52.20 GTexel/s
FP32 (float) performance
2,088 GFLOPS

Board Design

Slot Width
Dual-slot
Length
11 inches
279 mm
TDP
302 W
Outputs
2x DVI
1x HDMI
1x DisplayPort
Power Connectors
1x 6-pin + 1x 8-pin

Graphics Features

DirectX
11.2 (11_0)
OpenGL
4.4
OpenCL
1.2
Vulkan
N/A
Shader Model
5.0

Card Notes

Reference Design to ATi Radeon HD 5850 X2

dubbed HD 5950

Never Released Test Prototype

Hemlock GPU Notes

Chip Variant: Cypress
Graphics/Compute: GFX4
Display Core Engine: 4.0
Unified Video Decoder: 2.3