2GB RAM, what is fastest?

Greetings:

I tried upgrading the RAM to 2GB versions of CAS 3 or CAS 4 rated RAM, and the system would not proceed to boot. They are:

http://www.newegg.com/Product/Product.a ... 6820104100

http://www.newegg.com/Product/Product.a ... 6820231153

My questions are (for 2GB modules), what is the fastest speed (533, 667, 800?) and/lowest CAS (5, 4?) one has installed? Could you also let me know the brand?

also, is it such that the SPDs on the mobile modules don't allow for different speeds/CAS (like in desktop modules)? Thanks again all!

 

Why not contact Acer customer support and find out what type of RAM they have installed on the 2GB models? Or what RAM specifications are compatible? Ideally, before buying, but better to do this late than never. Also, Crucial and Kingston are better bets for memory and have much better customer support for returns and exchanges. Worth the extra $4 over brands like GSkill.

If I get ambitious later, I'll see about opening one of those little doors on the bottom of my system and seeing if the specs are listed on the RAM module (I have a 2GB model, Vista model).

 

http://www.crucial.com/

Click on scan my system and allow the active x.

 

Crap. I think we both steered him wrong. I checked out the scanner on the Crucial website (which normally works like a charm), but apparently our systems just aren't in their databases yet. All it could determine was that I had a single 2 GB module. And that Dual Channel was not possible. It could not determine what memory types would be compatible for him.

 

Anybody upgraded to 2gb yet and know what does work? thanks

 

Transcend DDR2-SDRAM PC2-6400 Part # JM800QSU-2G

 

Bought this one, runs fast



Greetings,
Felix

In your Acer 751? :lol:

 

before i took it back Yes :roll: And Not Generic RAM Like ^^^^

General Information
Brand Name: Transcend

Manufacturer: Transcend Information, Inc

Manufacturer Part Number: JM800QSU-2G

Manufacturer Website Address: http://www.transcendusa.com

Marketing Information: The JM800QSU-2G is a 256M x 64bits DDR2-800 SO-DIMM. The JM800QSU-2G consists of 16pcs 128Mx8bits DDR2 SDRAMs in 68 ball FBGA packages and a 2048 bits serial EEPROM on a 200-pin printed circuit board. The JM800QSU-2G is a Dual In-Line Memory Module and is intended for mounting into 200-pin edge connector sockets. Synchronous design allows precise cycle control with the use of system clock. Data I/O transactions are possible on both edges of DQS. Range of operation frequencies, programmable latencies allow the same device to be useful for a variety of high bandwidth, high performance memory system applications.


Product Line: JetRAM

Product Name: JetRAM 2GB DDR2 SDRAM Memory Module

Product Type: RAM Module



Manufacturer : Transcend Information
Part Number : JM800QSU-2G
Serial Number : Unspecified
Type : DDR2-SDRAM PC2-6400 (399 MHz) - [DDR2-800]
Format : SO-DIMM (67.6 x 3)
Size : 2048 MB (2 ranks, 8 banks)
Module Buffered : No
Module Registered : No
Module SLi Ready (EPP) : No
Width : 64-bit
Error Correction Capability : No
Max. Burst Length : 8
Refresh : Reduced (.5x)7.8 µs, Self Refresh
Voltage : SSTL 1.8v
Prefetch Buffer : 4-bit
Manufacture : Week 52 of 2008
Supported Frequencies : 200 MHz, 266 MHz, 400 MHz
CAS Latency (tCL) : 3 clocks @200 MHz, 4 clocks @266 MHz, 5 clocks @400 MHz
RAS to CAS (tRCD) : 3 clocks @200 MHz, 4 clocks @266 MHz, 5 clocks @400 MHz
RAS Precharge (tRP) : 3 clocks @200 MHz, 4 clocks @266 MHz, 5 clocks @400 MHz
Cycle Time (tRAS) : 9 clocks @200 MHz, 12 clocks @266 MHz, 18 clocks @400 MHz
Min TRC : 12 clocks @200 MHz, 16 clocks @266 MHz, 23 clocks @400 MHz

Warranty
Standard Warranty: Lifetime
Green Compliance: Yes

Green Compliance Certificate/Authority: RoHS

 

Your Welcome

 

I've upgraded my 751h to 2GB ram. OCZ PC2-6400 CL 5-5-5-15 DDR2 800MHz SODIMM 2GB Module.

Available on Amazon: http://www.amazon.com/OCZ-OCZ2M8002G-PC ... 427&sr=1-2

 

hi teckhian,
Is there a noticeable difference after upgrading to 2GB ram?

 

My model has 2Gb of RAM. However, even with Windows Vista and a large number of open programs, I don't usually exceed 1GB of RAM usage. With Windows XP, you are even less likely to use more than 1 GB of memory.

I'd guess that most people on this forum won't see any speed gain from the extra RAM. However, it's a cheap upgrade. So if it makes you feel good, get it.