SWING! and a miss.If you're expecting DDR4 to radically change this scheme, prepare to be disappointed. DDR4-2800 won't be any different from DDR3-2800.
Strike THREE!... DDR3-2400 is only a tiny fraction better than DDR3-2133
You do realize that FBDIMMs are actually SERIAL using TMDS signaling, right? This exactly what I said... serial interfaces have a much easier time getting through sockets and slots at very high speeds because every bit can be locked on individually, no need to worry about clock skew between bits the way wide high speed parallel interfaces do.That the GPU is soldered, memory is soldered, and differences in chip count are all insignificant to my point. They prove that it can be done and in the past, we've had FB-DIMMS with huge transfer rates
But the overall latency x period yields roughly the same effective latency in terms of nanoseconds and gimping your clock rates achieves nothing more than sacrifice bandwidth. In benchmarks, higher bandwidth with lower effective latency practically always wins even if latency is numerically higher.Again, no serious loss for DDR3. Furthermore, many newer high-frequency DDR3 modules with decent timings can be underclocked and timing-tightened much tighter than even DDR2 modules achieved.