There's a GREAT Gigabyte forum over at:
http://forums.tweaktown.com/f69 You'll find a step-by-step 'sticky' on RAM testing/tweaking; follow the instructions carefully, and odds are 90%+ that you'll find your RAM's OC 'sweet spot' w/no further assistance...
I've heard that Gb boards, in general, 'like' Mushkin RAM. Not to say others' WON"T work, just that Mushkins seem to take less fiddling with, and if you ARE willing to fiddle, might OC better. That said, I just built a GB based new workstation, and NE had such a deal on G.Skill 1066 G.Skill F2-8500CL5D that I just couldn't pass it by; I had absolutely no problems with them. This brings me to the only caveat, and I can't, at this point, check it out for you, as G.Skill seems to have recently revamped their website, and attempts to get info there result in:
"The requested URL /en/techinfo.html was not found on this server
The requested URL /en/ddr2.html was not found on this server"!
The problem I'm refering to is this - when I was investigating using G.Skill one of the types I looked at (and, unfortunately, I can't remember which one it was offhand) had a heat sink/spreader assembly that was about a half millimeter too wide (or thick, depending on how you look at it) to fit the RAM slot spacing in GB (and most other) MOBOs. I'll try to hunt around & see if I can check this out further...
From answering posts here, and reading lots more on TweakTown, the only RAM that seems to really be a consistent problem is Corsair - not only do they appear to cause a lot of grief getting them to work, but they apparently often degrade over time, so an overclock that's been stable will 'break' after six or nine month's use...
GB GA-X48-DS5 w/f8a BIOS - Q9550 stepE0 @ 3.825Ghz:
Arctic Cooling Freezer7Pro w/92mm PWM 'daisy-chained' to CoolIt Systems RamFan w/EverFlow F126025BU 60mm PWM;
Sunon KDE1204PFV2 40mm/NorthBridge; EverCool EC3010M12CA 30mm/SouthBridge;
8Gb (4x2) 1066 G.Skill F2-8500CL5D @ 1080 (DDR2-8640) 5-5-5-15 on 2.4(6:5)mult/1333strap...
CoolerMaster Cosmos 1000 w/Silverstone SST-CMD01 ESA 5ch fan controller/4ch temp sensor:
3 Arctic AC12L exhaust (top x 2 + rear); 2 Scythe SF12D (HDD cage top + rear); Scythe SF12E bottom intake...
Koutech IO-FPM220 3.5" Floppy & Card Reader; 2 IDE DVD's;
4 150Gb WD Velociraptors in two RAID0 pair-OSs & swaps; 2 1Tb WD RE3s in RAID1-data; 1 Sg 1.5Tb backups...
Multiboot via BootIt NextGeneration:
VistaUltimateX86/VistaUltimateX64/XpProX86/XpProX64(courtesy of TechNet)
SBD!
Mind you, the problem I spoke of is a non-issue if you only ever intend to use two sticks; I planned to populate all four slots, and thus couldn't use it...
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