What's the best memory RAM for my computer?

I do not believe Phenoms support speeds greater than 800Mhz at the quantity you are looking to use. Please check with your motherboard maker as to what they do support.

hmmm but badge, your motherboard is m3a78-em, mine is just m3a78.

i think theres a diference well i dunno.

i heard that my motherboard wont be able to use 8gb ddr 2 at 1066.

but well iam ok with this, i know that there are very good ddr2 800 high performance.

so which one shuld i buy?

Product page.

http://www.asus.com/product.aspx?P [...] templete=2

i dont undestand this

"Due to AMD CPU limitation, DDR2 1066 is supported by AM2+ CPU for one DIMM per channel only. Please refer to www.asus.com or user manual for Memory QVL."

Your MB will support 8 GBs of RAM no matter if you install PC2 8500 or PC2 6400. But the chipset will not attain PC2 8500 1066MHz. speeds. Bottom line, you can use 8 GBs DDR2, but the top speed is limited when doing so. PC2 8500 is simply overclockable PC2 6400 800Mhz. RAM.

thanks mate. so do you think is worth to buy the best ddr2 800 and then make a overclock ?

Haha! Yeah just buy 8 GBs PC2 6400 800MHz. for that board. BIOS will have a setting for 800MHz. Should work without issue in that configuration. The PII 940 has an unlocked multiplier, which I use to overclock. I then set my RAM speed to 1066MHz. in BIOS, 8 GBs at 1066MHz. with the processor at 3.6GHz. via the unlocked multiplier. Your board will not run at 1066MHz. like this with 8GBs. But 8 gigs will run at something less than 1066MHz.

I had 8 GBs of this PC26400 running fine in my board. But, even by OCing the system BUS these kits would not reach 1066MHz. They would run at around 900MHz. or slightly less with the board which is pretty well for price/performance.

http://www.newegg.com/Product/Prod [...] 6820231122

bios is up to the date.


what do you think about this one http://www.newegg.com/Product/Prod [...] 6820145184

iam about to buy those corsair i showed above. do you think they are good for overclocking?

hmmm cool but i think ill buy the corsair 1066 dominator anyway, ill try to make the 8gb run at 1066 and even if they dont, ill w8 for any update in bios or something, and then if they update bios..ill be already ready to use the 1066 what do you think?

If Ocing by the unlocked multiplier, the RAM does not move to higher clocks because the system BUS is not OC'ed, the CPU multiplier is. Anyway, if OCing by increasing the BUS speed, the G. Skill PC26400 RAM I linked will run at near 900MHz. @ 4-4-4-12. That's why everyone on the 'egg gives it such a high rating.

So you plan on overclocking? Overclocking by raising the system BUS? Or overclocking by raising the CPU's unlocked multiplier? Or not overclocking at all?

If you are overclocking by the CPU's multiplier, the RAM is set at 800MHz in BIOS and does not 'overclock' along with the CPU. This is because the system BUS has not been increased taking the RAM to higher speeds with it. This is the way I overclock to 3.6GHz. with the PII 940. I overclock with the CPU multiplier. Tyhen in BIOS using the 1066MHz. setting for my RAM speed.

If you overclock the system BUS speed, it takes the RAM to higher speeds along with the CPU. You are probably confused by now. 8)

btw are you using memories ganged or ungaged?

hmmm lol ok..so ill just buy an decent memory ddr2 800..and put 8gb.. what you think?

ok. ill look for the best corsair, brazil sucks for buy those things..too expensive and we dont have many options. so what memory ddr2 you recommend boss? hehehe

Memory at 1066MHz.

so you mean to me get a ddr800 and set on setup to 533mhz..then it would work at 1066?

Well, hard to find 800Mhz. RAM that will run at 1066MHz., no guarantee and every system is different. And if you populate all four slots, your board will not run the RAM at 1066MHz. or 8.5GB/sec transfer rate. So, if using 8GB, looks like PC2 6400 4 x 2 GB would be the solution. Then with PII 940 use the unlocked multiplier as described and set the RAM to 800MHz. in BIOS and know the RAM will run at 800MHz. and not have to clock faster to keep up with the CPU being overclocked with the system BUS. So, yeah, I mean the Corsair is some nioce RAM. Just look for 2,0v or less to achieve 800MHz. at 4 or 5CAS.

not yet ^^ but ill install vista 64...and ye my mistake those are 2x1..aff lol

btw i found a Corsair Ddr2 Xms2 Dhx 4gb C4 (2 X 2 Gb) Pc6400 Dual Channel with 4-4-4-12 latency..but 2.1V is this ok?

Forgot to mention, BIOS will default the PC26400 to 1.8v in most instances. So, use 1 DIMM in slot 1 to load up everythin, OS etc., then add the other 6 GB later after SP1 and all updates and system drivers have been installed. You will have to go into BIOS and adjust the RAM voltage manually to 2.1v.

Consider Crucial' website. Maybe run the board through that memory configurator on the home page for suggestions.

http://www.crucial.com/

I still think that he could get 4 DIMMS working at 1066 with a bit of effort. As I said before, the x58 only supports one XMP DIMM (>1333MHz) per channel (up to 3 DIMMS total), but plenty of people (myself included) are running systems with 6 DIMMS at >1333MHz anyways. Maybe the AMD system is more difficult to push past the official amount supported, but I would be quite surprised if you couldn't get it to work at all.

ill buy 2 kits of those

http://produto.mercadolivre.com.br [...] 4gb-nf-_JM

i was checking the dominator..it is very expensive and i doubt it would fit ok in my computer..the cooler of processor is to big and the dissipator of memory too..wont fit..

well i guess i made a nice choice right?