Currently running 2x Quadro FX 3500's NOT in SLI. I want to upgrade to a single faster card. The system that it would be going in is in my signature. I've been looking at either a Radeon HD 6670 or a 7790. Would it be worth it to spend the extra money on the 7790? My motherboard is only capable of PCIe 1.1 speeds, so I don't know how much that bottleneck will hurt.
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