About how much of a performance hit does one take between the two set-ups in subject. The 2x1Gb sticks are dropping into the basement for even 4-4-4-12 Quality sticks like G.Skill. By comparison 2x2Gb Quality sticks still well over 2 bennies. (Except the G.Skill 5-5-5-15 at 1.8-1.9V).
Although 4X1 gig sticks are nice,having 2x2gig sticks is better.Reason being is with the 2 2gig sticks you can set your command rate to 1 time instead of 2,thereby increasing overall performance.Unfortunately with 4 sticks of ram,your command rate will only run 2 times.This is done to ensure compatability between the memory sticks.Goodluck.
AMD X2 5600+ @ 2.8ghz(stock)
M2N32-SLI DELUXE MB
2 GIGS DDR2 800 RAM
THERMALTAKE 850WATT PSU
7950GT KO(WAITING FOR MY OTHER TO COME BACK FROM RMA)
ACER 22IN. LCD
SMILIDON RAIDMAX GAMING CASE
80GIG/250gig SATA2 HD's
1. Command rate needing to be set to 2T for 4 DIMMs is an issue with the Athlon 64 memory controller. We do not know if the OP has an Athlon or a Core 2. All a 2T command rate does is posts the command to the modules for 2 cycles rather than 1, and is much less of a limitation than the horrible latencies in 2GB modules anyway.
2. While 2x1GB is better than 4x512MB, the same CANNOT be said about 2x2GB vs 4x1GB. While 1GB DDR2 DIMMs have been out for a long time and they are now cheap and have nice speeds and timings, 2GB modules usually cap at 667MHz (there are a very small selection that will run at 800MHz for $$$), and have horrible latencies.
5-5-5-15 @ 667MHz is not uncommon for 2GB modules, while 1GB modules come in 3-3-3-12 @ 667MHz and 4-4-4-12 @ 800MHz.
3. 2GB modules are significantly more expensive in terms of $/GB.
Basically, unless you can forsee a future need for 6GB or 8GB, and by the time games need that you'll be using DDR3 anyway, go with the 4x1GB.
One should presume that this is for the signature build at bottom of post, and it will be an AMx2. But when the price cuts are done in about a month, I might very well go for a C2D6600 or Q6600 (Q66 a bit more than I need, but with vista... who knows ) And judging the graphx card, I'm not a HC gamer, but interested. No SLi/XF forseeable, but an upgrade to DX10.
Considering the 2T aspect there are some 2x2Gb GSkill that run 4-4-4-12 2T 1.8-1.9V. about $215 and dropping. 2 sets of 2x1Gb same manufacturer and latency: Volt is 1.9 cost $90 each = $180.
and how about that one?I'm looking for memory for p35... What is the voltage limit for memory at p35? I'm considering about this one as well:
OCZ DDR2 PC2-8500 SLI-Ready Edition Dual Channel, OCZ2N1066SR2GK
Well, in a way you're right about the 2x2Gb G.Skill ram. Its rated 1.8V and 5-5-5-15, and thats what it boots up as. As I look around at other builds and boards, not all boards boot up as 1.8V. From what I've read about this situation, there is a tendancy for these chips to default as 5-5-5-15 at any boot up. Quite a few readers/owners have pointed out quite correctly to check voltage when using these particular chips. If its 1.9V at bootup, then set the latencies as 4-4-4-12. I don't see anything about auto-detection, and what THAT voltage/latency is. I'll keep looking.
I see that newegg has changed the way they're selling larger forms of RAM, notably the afore mentioned 2x2Gb sticks. Well, it seems that the egg is now also selling them as single sticks of 2Gb with a notice about use in x64 only systems. There are still offerings of them as 2x2Gb located here.