I want to get new updated better RAM, but I dont know what I can use, I currently have tried RAM recomending software, but I want to be sure I can get the best.
I currently have a
Hardware Overview:

Model Name: iMac
Model Identifier: iMac10,1
Processor Name: Intel Core 2 Duo
Processor Speed: 3.06 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 3 MB
Memory: 4 GB
Bus Speed: 1.07 GHz
Boot ROM Version: IM101.00CC.B00

Current RAM is
Memory Slots:

ECC: Disabled

BANK 0/DIMM0:

Size: Empty
Type: Empty
Speed: Empty
Status: Empty
Manufacturer: Empty
Part Number: Empty
Serial Number: Empty

BANK 1/DIMM0:

Size: Empty
Type: Empty
Speed: Empty
Status: Empty
Manufacturer: Empty
Part Number: Empty
Serial Number: Empty

BANK 0/DIMM1:

Size: 2 GB
Type: DDR3
Speed: 1067 MHz
Status: OK
Manufacturer: 0x80AD
Part Number: 0x484D54313235533642465238432D47…
Serial Number: 0x24416576

BANK 1/DIMM1:

Size: 2 GB
Type: DDR3
Speed: 1067 MHz
Status: OK
Manufacturer: 0x80AD
Part Number: 0x484D54313235533642465238432D47…
Serial Number: 0x24716589

and I want to know
-Can I use different speed RAM (i.e. MHz)
-Can I use DDR2 DDR1 DDR5 or any other RAM type?
-Can I use single channel, dual channel, or triple channel RAM?

Please help I would really Appreciate it.

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