An EVGA nFORCE 680i SLI motherboard which I received second-hand with 4 GB of RAM installed is working fine, but is having problems doing what I want (playing current games) because of RAM-cram. 4 GB is barely enough to run a game these days. For a while now I've been unwilling to buy DDR2 RAM (which is what this MB uses) because it has been so expensive. Well over $100 when similar amounts or even more of DDR3 could be had for much less. It seemed a waste for an old system. Now I am seeing 8 GB of DDR2 as low as $60 on eBay and it is looking more attractive because of the performance problems the system is having with its current amount of RAM.
Here is the concern: This motherboard was said to have problems with a full 8 Gb of RAM. Apparently the memory subsystem does not always handle the load well. (It's one of those electrical engineering level problems that would be difficult to describe even if I understood it myself). Apparently it is a crap-shoot whether any given MB will work fine or have problems. My question is, would this general sort problem be related to the entire memory content, or to individual banks? It's it is a full load condition and not individual banks, maybe I could get 2 new SIMMs of 2 Gb and have 6 GB total without pushing the memory controllers (or whatever it is that is marginal) to the limit? Or would the larger SIMMS in even one bank be too much if these said components have a difficult time with the larger load?
This is very vague, but it's not something I can get much more specific about, not being that much of an expert myself. If anyone knows anything about nForce 2 motherboards and any possible limitations they had, please speak up.