@OP I'd ditch the 790i, especially now while you can sell it for a good price... IMO the new generation of GFX typically trumps SLI'd previous generation in both price and performance. Beyond that I still keep reading about multi card solutions putting out decent frames yet suffering from stuttering... Both Nvidia and ATI's next generation highend cards will sport 1GB of video memory, that will own current gen cards(even in SLI which is still only 512mb) @ higher resolutions (1900x1200+).
Originally Posted by Manyak
Well I can tell you one thing for sure - DDR3 is leaps and bounds faster than DDR2. You'll really be surprised how responsive your entire system becomes when you switch to DDR3.
I wholeheartedly disagree...
DDR2 1000mhz 5-5-5-15 $85
DDR3 1333mhz 9-9-9-24 $202
DDR3 1600mhz 7-7-7-24 $287
shipped after $40MIR
DDR3-1333 is a decent buy; DDR3-1600+ will start to take the performance crown away from DDR2.
The performance gain of even DDR3 1600mhz over DDR2 1000mhz is negligble, however we cannot say the same for the price when it's more than 3x that of DDR2.
DDR 3-1600 against DDR2 Performance :
Memory system synthetic tests
As start we used the utility Everest ultimate edition 4.00.
The maximum memory capacity demonstrates DDR 2-1200. Even DDR 3-1600, whose theoretical speed is higher was not capable to win over previous generation memory. Obviously, the fault is due to the high latency in DDR3 SDRAM. However, DDR 2-1000 with the most aggressive latencies 4- 4- 4-12 during memory reading shows lower speed , than DDR 3-1600, and than DDR 3-1333 with latency 5-7-5-15.
Memory writing speed is limited by the practical processor system bus capacity ;
During data copying , the memory latency plays a big role. Therefore the highest result in this test was from DDR 2-1200 with latency 5-5*5-15, and in the second place was for DDR 3-1333 with the latency 5-5-15 and DDR 2-1000 with latency 4- 4- 4-12. However, the memory modules DDR3 with CAS latency equal 7 in this test demonstrate the much worse result.
In other words, today's comparison DDR2 and DDR3 SDRAM , is again converted in test : capacity against latency.
Let us pass to complex benchmarks to tests the real applications performance impact.
SuperPi, PCMark05, 3DMark06
The highest result in superPi test shows DDR 2-1200 SDRAM. However, the second place is finally occupied by DDR 3-1600 with latency 7-6-6-18.