|See if you can follow my line of thinking:|
Intel "quad pumps" the FSB & then markets it as if it actually runs at that speed. 1066MHz FSB doesn't run at 1066MHz, it runs at 266MHz (1066/4).
DDR RAM (DDR1, DDR2, DDR3, etc) is double pumped & is also marketed as if it runs at that speed. DDR2-1066 doesn't run at 1066MHz, it runs at 533MHz (1066/2).
Whenever you see the CPU:DRAM ratio mentioned, that ratio is based on the true speeds, not the advertised/theorectical DDR or QDR speeds. In other words, if you pair up a 1066MHz FSB CPU with DDR2-1066, the ratio is 266:533, which reduces to 1:2.
Up until recently, the optimal ratio was always said to be 1:1, but the latest testing has shown that 1:2 is slightly better. And when I say "slightly", a mean a few pecentage points. Hardly anything to write home about.
If your budget is limited, I suggest you juggle things around a bit to try to free up a few bucks, then get 4GB DDR-800.
How about something like this:
GIGABYTE GA-EP45-UD3L - $75
Intel Pentium E5300 2.6GHz/800MHz FSB - $70
ASUS HD4670 512MB (750MHz/1800MHz) - $38
CORSAIR XMS2 4GB (2 x 2GB) DDR2-800 - $80
There are several rebates involved but the total after rebates = $263. I'm sure you'll question the CPU choice & probably the video card too. The video card is easy to explain...the memory runs 200MHz faster than the card you picked, plus I'm sure $38 is a LOT cheaper. The 512MB vs 1GB is a pretty much a non-issue. If you care to take the time to read, here's an article for you:
How Much RAM Does Your Graphics Card Really Need?
Now for the CPU. The Pentium Dual Core is nothing more than a Core 2 Duo that runs at 800MHz FSB & has less L2 cache. By going with the E5300, you'd be saving $50. It's default clock settings are 13 x 200MHz & that provides a TON of room for reclocking without necessarily overclocking. For example:
13 x 200MHz = 2600MHz @ 800MHz FSB (default)
10 x 266MHz = 2666MHz @ 1066MHz FSB
8.0 x 333MHz = 2666MHz @ 1333MHz FSB
6.5 x 400MHz = 2600MHz @ 1600MHz FSB
The last one on the list would be the fastest & would allow you to run DDR2-800 at it's default speed with a 1:1 ratio. And if you're concerned that 2.6GHz is less than 2.93GHz, remember that the FSB is 1600MHz vs 1066MHz. Of course you could always increase the multiplier from 6.5x to 7.5x & run it at 3.0GHz. Actually, it can go a LOT higher than that :)
I have a feeling you're not gonna go for my suggested config, but if you simply change the video card to the ASUS, you'd probably save enough to be able to get 4GB of DDR2-800.
NOTE: Sorry if I went overboard - I'm off sick today & have nothing better to do...lol