It's been a while since Asus launched their AMD Radeon HD 7850 Series using Direct Cu II cooling technology. The GPU, Pitcairn, is a downscale from the HD 7900 "Tahiti" silicon, which introduced AMD's new "GCN" Graphics Core Next architecture. Targeting gamers at mid-range budget of $200-$300.
Specifications
Graphics Engine AMD Radeon HD 7850
Bus Standard PCI Express 3.0
Video Memory 2GB GDDR5
Engine Clock 870 MHz
Memory Interface 256-bit
Testing System:
Intel Core i7 2600k
ASUS P8Z77-V
G.Skill 16Gb 2133Mhz CL9
OCZ SSD 128Gb
FSP HEXA 550W
------------------------------------------------------------------------
Unboxing Graphic Card
Asus HD7850 Direct Cu II Box
Asus HD7850 Direct Cu II features:
A nice black box after removing from the packaging boxe
Open black box cover and another small black box of Accessory package
Accessory Item:
1x Manual book
1x VGA Driver
1x DVI-I to D-sub converter
Here come the card
The card: Asus HD7850 Direct Cu II 2Gb
I/O:
2x Mini-Display Port
1x HDMI 1.4
1x DVI
Back of the card
Extended 6-pin cable for you to insert power from your PSU and the card is smaller size so this extend cable help you easily plug-in without damage the card.
Dismantle PCB and Direct Cu II heatsink
This card require 6-pin power
AMD GPU Core
Red: Eight Hynix Memory chips
Blue: 1 power phase for 12v and one mosfet driver on the right
Orange: 1 Power Phase for Vram and one mosfet driver on the right
Video Memory of 8x 256MB Hynix BGA GDDR5 modules clocked at 1250MHz (5000MHz QDR)
GPU core Power Phase area
Total 4 Power Phase for GPU cores:
Per color is 1 power phase and they are switching on and off very fast.
Asus used High Quality Mosfets, Two 4935N MOSFETs act on the low-side, and a single A4921N is used as the high-side. These MOSFETs have very low RDS(ON)
A ON Semiconductor NCP5395T 4-phase PWM is used as control voltage and monitoring.
Crossfire link: Allow you to link another Asus HD7850 card to boost up to 1.5-2.0 times performance
This black Asus heat-sink allow inner PCB layer to spread heat and lower down the PCB temperature
Video of Asus Direct Cu II
[YOUTUBE]http://www.youtube.com/watch?v=8inXR-LqPNc[/YOUTUBE]
Asus Direct Cu II heat-sink & Fans
ASUS Dust-Proof Fan design used on the DirctCU II cooler. The fan’s housing and hub assembly is double sealed to prevent dust and particles from entering.
The two fans used in the setup are actually different - a 10-bladed 72mm 0.35A model taking care of dissipating the heat from the GPU and the other 9-bladed 80mm 0.5A unit handling VRM.
HD7850 Direct Cu II heat-pipe, seem like a difference Direct Cu II design from HD7970
Side view: Direct Cu II
Direct Cu II direct contact GPU Core using copper heat pipe
Specifications
Graphics Engine AMD Radeon HD 7850
Bus Standard PCI Express 3.0
Video Memory 2GB GDDR5
Engine Clock 870 MHz
Memory Interface 256-bit
Testing System:
Intel Core i7 2600k
ASUS P8Z77-V
G.Skill 16Gb 2133Mhz CL9
OCZ SSD 128Gb
FSP HEXA 550W
------------------------------------------------------------------------
Unboxing Graphic Card
Asus HD7850 Direct Cu II Box
Asus HD7850 Direct Cu II features:
A nice black box after removing from the packaging boxe
Open black box cover and another small black box of Accessory package
Accessory Item:
1x Manual book
1x VGA Driver
1x DVI-I to D-sub converter
Here come the card
The card: Asus HD7850 Direct Cu II 2Gb
I/O:
2x Mini-Display Port
1x HDMI 1.4
1x DVI
Back of the card
Extended 6-pin cable for you to insert power from your PSU and the card is smaller size so this extend cable help you easily plug-in without damage the card.
Dismantle PCB and Direct Cu II heatsink
This card require 6-pin power
AMD GPU Core
Red: Eight Hynix Memory chips
Blue: 1 power phase for 12v and one mosfet driver on the right
Orange: 1 Power Phase for Vram and one mosfet driver on the right
Video Memory of 8x 256MB Hynix BGA GDDR5 modules clocked at 1250MHz (5000MHz QDR)
GPU core Power Phase area
Total 4 Power Phase for GPU cores:
Per color is 1 power phase and they are switching on and off very fast.
Asus used High Quality Mosfets, Two 4935N MOSFETs act on the low-side, and a single A4921N is used as the high-side. These MOSFETs have very low RDS(ON)
A ON Semiconductor NCP5395T 4-phase PWM is used as control voltage and monitoring.
Crossfire link: Allow you to link another Asus HD7850 card to boost up to 1.5-2.0 times performance
This black Asus heat-sink allow inner PCB layer to spread heat and lower down the PCB temperature
Video of Asus Direct Cu II
[YOUTUBE]http://www.youtube.com/watch?v=8inXR-LqPNc[/YOUTUBE]
Asus Direct Cu II heat-sink & Fans
ASUS Dust-Proof Fan design used on the DirctCU II cooler. The fan’s housing and hub assembly is double sealed to prevent dust and particles from entering.
The two fans used in the setup are actually different - a 10-bladed 72mm 0.35A model taking care of dissipating the heat from the GPU and the other 9-bladed 80mm 0.5A unit handling VRM.
HD7850 Direct Cu II heat-pipe, seem like a difference Direct Cu II design from HD7970
Side view: Direct Cu II
Direct Cu II direct contact GPU Core using copper heat pipe
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