Win 7 Ultimate 64bit.... 4gigs of DDR2 enough?

Am I upgrading from Win XP 32bit to Win 7 64bit, I currently have 3gigs, 1 slot left open.... trying to decide whether to fill the last slot with 1gig stick or buy 4 x 2GB sticks for a total of 8gigs? What do you think?

I use my PC mainly for gaming

Just put 1GB stick ddr2. Just so you can do dual channel, just don't forget to buy the same frequency you had, if you others ddr2 are 667,800 or 1033mhz buy the same frequency

There is no point on going 8gb ddr2, specially if you are just upgrading OS and not hardware, won't make you PC any better because the bottleneck will be the CPU/GPU or even motherboard data transfer.

The only reason to go past the 4gb sweet spot for gaming is if you running i7 cpu with DDR3 6GB and a very good motherboard and GPU.

(you can use memory of diferent size on same mobo, only thing thing is that dual channel will always be of the lower size, frequency and latency of both)

So you could keep your memory but go for a larger single stick.

But again.. you won't see any gain on GAMES whatsoever.

what your PC specs?

Q6600 2.4 Ghz

3gigs of DDR2

P35D Motherboard

gtx 275

Found on your post history.

you overcloaked like you were trying?

Your rig is fine with 4gb... save for when you decide to upgrade to a ddr3 mobo, if you ever do...

I miself think you rig is great for now(going 4gb 64bit), and wouldn't bother upgrading parts, would be better to make a new PC from scratch later.

Thx alot for the advice... I think I'll get the extra 1 gig stick then... and stay with 4gigs, until I decide to upgrade the MB and CPU

One more thing... using CPU-Z i see that my RAM is PC2-6400 (400... 800 dual channel) but since I have 3 sticks of 1 gig each... its not running at 800Mhz... but it should be running at 400 right? but CPU-z says its running at 333.4 Mhz... half of 667?

If it recognizes the RAM as PC2-6400 400Mhz Dual Channel, then why is it running at 333.4Mhz.... any idea?