|VisionTek Killer HD5770 Combo Card|
|Reviews - Featured Reviews: Video Cards|
|Written by Steven Iglesias-Hearst|
|Wednesday, 16 February 2011|
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VisionTek Killer HD5770 Detailed Features
In this section we shall take an in depth look a the Killer HD5770 and see what is going on beneath the shroud of mystery.
The fan is a model GA9202H 90mm fan made by a Taiwanese company called Apistek who design and manufacture high quality heatsinks solutions for GPU and CPU applications, so it might well be safe to say that the heatsink was made by Apistek too. Neither VisionTek nor Apistek have any specs on the fan, it is a simple two wire design and the speed is controlled by voltage rather than PWM. The design looks simple but effective, using a mixture of solid surface area and extended fins to actively cool the GPU and allow air to get to the other on board components.
On the PCI bracket we have an HDMI port (with audio), two dual link DVI-I ports and a CAT5 LAN port. The top part is also vented but I don't think much air will be exhausting here due to the design of the cooler but the more ventilation the better, right?
In the image below I have zoomed in on what I consider to be the highlights of this card. On the right we have the all important 40nm Juniper GPU driving the Killer HD5770 with its 800 unified shaders and core clock at the reference speed of 850MHz. Next to that we see that VisionTek have opted for Elpida GDDR5 RAM module's over the usual Samsung chips that we normally see, there are eight units in total (four front, four back) for a total 1GB of memory running at 1200MHz (4.8GHz effective) and these Elpida chips are rated at 5GHz so there is a little bit of headroom for overclocking.
On the left hand side we have the E2100 network processing unit which runs at 400MHz and utilizes two Elixir 64MB DDR2 modules for a total of 128MB RAM running at 266MHz. The Killer HD5770 also has its own PLX bridge chip on board, and I can only assume its purpose to be for bandwidth management. The PLX PEX8624-BB50BC F is a 24 lane, 6 port PCI Express Gen 2 (5.0 GT/s) switch and should provide all the bandwidth this card may need since it is using more than the 16 PCI-E lanes provided by the PCI-E slot.
Supporting the Killer E2100 NPU (on the reverse side of the card) is the Marvell Alaska 88E1118R 10/100/1000BASE-T PHY with RGMII which is a Ethernet Physical transceiver (Ethernet PHYceiver) Its purpose is physical, analogue signal access to the link which in this case is the E2100 NPU thus completing the NIC (Network Integrated Controller) portion of the card.
The VisionTek Killer HD5770 utilizes a 3-Phase uP6204BJ voltage controller, there is no software or BIOS level voltage control, when the card is idle it uses 0.95v and uses 1.2v at full load.
The last chip to point out is the uP7706U8 memory voltage controller which is fairly standard on Radeon HD5XXX and HD6XXX video cards.