No. No. No. And also no.
First, I just recommend the GTX 970, not the Titan X. I never mentioned the Titan X in this thread, nor did I mention anything about the Tyan chassis. In fact, rarely do I even mention the Tyan chassis on these forums.
Second, even when we were recommending AMD GPUs prior to Maxwell, we never once recommended that anyone buy the 295X2 because it is a horrible card for oclHashcat. We always recommended that people buy 2x 290X instead of 1x 295X2.
Third, the 295X2 is the same price as the Titan X, is roughly the same speed as the Titan X, and yet requires 2.5x more power than the Titan X, doesn't work well with oclHashcat, has braindead firmware, requires watercooling, and grossly violates the PCI-e specification. So no, 295X2 is certainly not the way for enthusiasts to go. I'd take a Titan X over a 295X2 any day of the week, and 4x Titan X rig would definitely be the ultimate enthusiast rig -- less money than your 4x 295X2 rig even, since you could easily power the whole system on a single 1400W PSU.
Fourth, bringing this thread back on topic, the OP wants to build a 7-GPU rig. I recommended he use the GTX 970. 7x GTX 970 is half the price of 4x 295X2, requires 62% less power than 4x 295X2, and yet would only be ~17% slower than 4x 295X2. 7x GTX 970 also won't be causing any fires anytime soon, while the 295X2 is just a fire waiting to happen (250W through a single 8pin!?!)
So I stand by my assertions. There's absolutely no reason to buy an AMD GPU for a new build -- regardless of whether you're a professional, an enthusiast, or a hobbyist. Nvidia is just plain better on every level.
First, I just recommend the GTX 970, not the Titan X. I never mentioned the Titan X in this thread, nor did I mention anything about the Tyan chassis. In fact, rarely do I even mention the Tyan chassis on these forums.
Second, even when we were recommending AMD GPUs prior to Maxwell, we never once recommended that anyone buy the 295X2 because it is a horrible card for oclHashcat. We always recommended that people buy 2x 290X instead of 1x 295X2.
Third, the 295X2 is the same price as the Titan X, is roughly the same speed as the Titan X, and yet requires 2.5x more power than the Titan X, doesn't work well with oclHashcat, has braindead firmware, requires watercooling, and grossly violates the PCI-e specification. So no, 295X2 is certainly not the way for enthusiasts to go. I'd take a Titan X over a 295X2 any day of the week, and 4x Titan X rig would definitely be the ultimate enthusiast rig -- less money than your 4x 295X2 rig even, since you could easily power the whole system on a single 1400W PSU.
Fourth, bringing this thread back on topic, the OP wants to build a 7-GPU rig. I recommended he use the GTX 970. 7x GTX 970 is half the price of 4x 295X2, requires 62% less power than 4x 295X2, and yet would only be ~17% slower than 4x 295X2. 7x GTX 970 also won't be causing any fires anytime soon, while the 295X2 is just a fire waiting to happen (250W through a single 8pin!?!)
So I stand by my assertions. There's absolutely no reason to buy an AMD GPU for a new build -- regardless of whether you're a professional, an enthusiast, or a hobbyist. Nvidia is just plain better on every level.