EVGA's Halloween offering, the mystical graphics accelerator with two different GPUs - each handing one kind of task - is official. Behold the EVGA GTX 275 Co-op PhysX accelerator. This unique graphics accelerator uses an NVIDIA GeForce GTX 275 GPU to handle the primary task of graphics processing, while offloads GPGPU related tasks, such as game physics acceleration using the company's PhysX technology, to a second GeForce GTS 250 GPU. While the GTX 275 component has 896 MB of GDDR3 memory across its usual 448-bit wide interface, the GTS 250 has 512 MB of it across its 256-bit wide interface, 1280 MB total on board (though not the total amount of memory available to a 3D application).

While not intended to be a true dual-GPU accelerator in essence that the two GPUs work in tandem to render graphics, the design ensures that the GeForce GTX 275 works with zero overhead from processing PhysX. The two GPUs are not part of an SLI multi-GPU array. With the provision of two SLI fingers, users can pair up to three of these in a 3-way SLI array. It is logically possible to pair this with other normal GeForce GTX 275 accelerators as well.The construction involves placing the two distant cousin GPUs on a single PCB, each with its designated areas for memory and VRM, and connected to an NVIDIA nForce 200 bridge chip, which connects to the system over a PCI-Express 2.0 x16 interface. The design is heavily borrowed from NVIDIA's GeForce GTX 295 (single-PCB). A centrally-located fan blows air onto heatsinks located on either of its sides, which cool the GPUs. The display is handled by the GeForce GTX 275 GPU, which connects to the two DVI-D output connectors.All said and done, EVGA expects significant performance increments over the vanilla GeForce GTX 275, in games that make use of NVIDIA's PhysX technology. EVGA's GeForce GTX 275 Co-op carries the stock number 012-P3-1178-AR. Listed on the company's online store, it is priced at US $349.99.