wich one should i buy?

if you're planning on using it for Games, remove the sempron from your check list. it probably only run on 333/400 bus, somewhat slow. Go for the Athlon64 or the AthlonFX, these babies run on HT (not hyperthreading, hyper transport  ). For motherboards, any Asus brands over there?

And dont forget, games also depend on other stuffs like RAM and of course a kick ass video card.

Look for an nforce 3 (for agp only) or nforce 4 chipset (for pci-e only) in whatever brand of motherboard you can find.

I would recommend ordering a socket 939 nForce4 motherboard and 939 CPU online.

939 supports a 1000MHz hypertransport vs. only 800MHz in the 754
939 supports dual channel while 754 only does single channel
939 is Dual core capable whereas 754 is only single core

There may be legal ways to avoid the importation tax - you might want to check the status of the South American free trade agreement and do some research on your local laws. Maybe you can have a friend ship it to you or something.

Good luck! :-)

Hey there, I have pretty much your same problem, I'm from Peru, and I can't find any good AMD processors, and if I order something from US I would also have to pay lots of taxes =/ Luckly for me, my uncle is coming from US to Peru, so I'm asking him to bring me a new processor and video card. You should try to do the same, find a friend or relative who is returning from US and ask him to bring you stuff.

Can't you find 939 processors over there? Are you absolutely sure? I think I can even find those here and your country is more devoloped lol

no, i (probaly) can find 939 processors.... but they are hmmm.... 100% more expensive than 754 =D and I live in Belo Horizonte, Minas Gerais state, and everything considered "hi-tech" here is in São Paulo or Manaus... sometimes Rio... but still hard to find...

60% importation tax??... never heard of it. what kind of scam operation are those greedy con artists in south america running?

A Sempron 3400 would be about as fast as an Athlon 64/3000+, roughly....so I think it would do the job if you canot actually find an Athlon 64/3200+ or 3500+ reasonably priced...

(The Via and SIS chipsets are not *that* much slower in gaming, although an older Nforce 3 socket 754 would offer the best performance..)

(For gaming, the largest factor is the graphics card anyway...see if you can find a 6600GT, or perhaps a 6800GS, for roughly $130 and $209 at current US prices.....

Listen.. the only difference between the Sempron and real A64 are the cache. Some Sempron has 128, some 256. A64 has 512. That being said, ignore all the blurb about bus speed, dual channel.. and all fuzzy term that people want to use to look knowledgeable.

The sempron, higher than 3100+ would perform very good, if they have 512 megs and more RAM and a nice video card.

A nice 6600gt in AGP or PCIe or ATI X1600XT will do great for all game today. Unless you have more budget, then a faster video card would help more than a faster CPU.

Then, as for the mobo, maybe the nforce chipset is faster than the other, but the question is, will you notice it?? The answer is no. Unless you benchmark the machine, everything will look the same no matter the chipset used. And don't be fooled, current A64 chipset are very good. I've used them all and none of them has to give me problem yet.

Now, to look more knowledgeable, I'll put some buzz word and sentences at the end of my post..Dual core, opteron, dual channel, latency, timing, hyper transport, RAID, bandwidth, cool and quiet,...