Katp'n, I'm using 2 sets of G.Skill F2-8500PHU2-2GBHZ. These babies are certified to operate at 4-4-4-5-1T@2.2-2.4V.
http://www.gskill.com/indexen.html -> products -> DDR2 -> F2-8500PHU2-2GBHZ
However what G.Skill fails to mention is that you definitely need some extra cooling in order to hit the specified timings. At the beginning I had nothing of sorts and after just 5 minutes @1066 the sticks were getting so hot that I was getting all sorts of memory errors. Now I'm using an OCZ XTC cooler and everything works fine.
http://www.ocztechnology.com/p...roducts/ocz_xtc_cooler
I was also able to run stable at 4-3-3-3 but had the best results at 4-3-3-5 & 4-3-3-7, thus I 've chosen to stay at 4-3-3-5-2T@2.275V. I would love to have them running at 1T but this is out of the question with 4 sticks.
The G.Skills are also the main reason for me switching boards from GA-965P-DQ6 rev 1 to GA-N680SLI-DQ6 rev 1. The GA-965P-DQ6 was a great board and my 1st non ASUS board the last 4 years but it gave me lots of trouble during boot. Despite the fact that I had asked both my retailer and G.Skill Europe for advise on compatibility issues prior to buying the board, and despite both of them claiming that the G.Skill - Gigabyte combo would work trouble free, I ended up between a rock and a hard place. After a month of efforts to get the sticks from Germany and after endless hours on top of my pc I found myself ready to RMA the RAMs and send the board to hell.
Whenever I tried to operate the memories near their specs it was an 80 vs 20 chance that it would boot and the 80 was not in my favor. Once there, it was like a dream but most of the time it was a nightmare. After a couple of months straggling with boot problems when running @1066 and after many BIOS updates without the anticipated results I gave up. Since the G.Skills were far more expensive than the board I had no choice but to sell it.
I was looking to get the striker extreme from ASUS since it is a good board and I've never had problems with ASUS boards in the past but the rest of my setup was a bit too much for it. On the other hand the GA-N680SLI-DQ6 was exactly what I was looking for in terms of features and specs and although my first Gigabyte was not a success I'm glad that I went with it instead. With the exception of the RAID controller, this is much better than the GA-965P-DQ6, and it is exactly what I was hopping/praying for in terms of performance and compatibility with my G.Skills.
No matter what anyone may say about heat issues etc, this is a great board.
-------------------------------
Chieftech BA-01B-B-B, Enermax Galaxy 850W, GA-N680SLI-DQ6 rev 1 - F5b BIOS, Thermalright SI-128 + Thermaltake A2018 120x120x25 Smart Fan, 2 x G.Skill F2-8500PHU2-2GBHZ - 4 x 1GB DDR2-1066 @1066 4-3-3-5-2T@2.275V + OCZ XTC Cooler, ASUS EN8800GTX 768MB HTDP, 6 x WD 74GB Raptors in 3 sets of Raid 0, 2 x Seagate Barracudas 7200.10 320GB in Raid 0, Plextor PX-716SA, Plextor PX-760SA, LG GSA-H20L, Iomega REV (35/90GB ver), LG L1980Q, Kitchen Sink.