VisionTek 4850 1GB B2 ReviewRHKCommander959 -
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The VisionTek 4850 1GB B2 is powered by a 55nm production RV770 core, with 800 pixel shader processors, 16 ROPS, and 1GB of Qimonda GDDR3 memory rated for 1000MHz operation. The card comes with an Arctic Cooling heat sink, the Accelero L2, a small lightweight and quiet aluminum heat sink. The fan motor hub has a V sticker for the VisionTek company logo. The memory that runs parallel to the PCI Express slot is cooled by five notches cut into the heat sink to allow some airflow to them, while the rest of the memory sits under the fins nicely. The card has DVI, VGA, and HDMI connectors, so most setups will be easily installed. Personally I prefer a pair of DVI ports to a DVI and VGA as a simple and cheap adapter, which this card came with, can downgrade the image to VGA, while also allowing the card to provide two DVI ports for multi-monitor setups. The PCB is red, as is common with ATI graphics cards, and the memory does not have much to cool it down, save some airflow, so memory overclocking will definitely be limited. The back side of the card is clean, with four screws and two push-pins used to mount the two heat sinks. Three small holes are available to mount heat sinks to the memory. With some modifications this card should do really well.
Connectivity isn't a problem with this 4850, except for users that want dual DVI, or that use component out. The power circuitry of the VisionTek 4850 is cooled by a large orange heat sink that is held in place by two push-pins. Nice capacitors and chokes are dotted around the heat sink. Next to it is the 6-pin PCI Express power plug - this card uses so little energy that it only requires one supplementary power cable rather than two like the high-end cards. Just as with most ATI cards, this card has two CrossFire connections for CrossFireX with any other compatible ATI card.
To cool this video card, VisionTek uses the Arctic Cooling Accelero L2 heat sink to cool the core and blow air across the memory ICs. The fan runs off of 12V and 0.15A, and runs extremely quietly. The fan snaps onto the heat sink with two clips. The heat sink itself is simple aluminum with two sets of holes for mounting to various video cards.
With the cooler removed, the core is exposed. A shim is installed around the core to protect it and the small resistors around it. This definitely helps people who replace the stock cooler by helping protect the core from cracking accidentally. The Qimonda memory is under clocked 50MHz to 950MHz, probably because of stability issues from heat, since they have no cooling at all save for the faint airflow from the fan.
Let's move on.