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Mobo and PC manufacture Differ in size Limit......

Last response: in Memory
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September 18, 2007 8:50:52 PM

ok normally i can answer this myself but this week my brain has been fried (think i am headed into a breakdown)

this is the computer i have at work. Currently it has 1 stick of 512 PC2700, and HP says that it can handle a max of 1gb :
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00090221&lc=en&cc=us&dlc=&product=405460



Ram [b said:
(installed) 512 MB (1X512MB) up to 64 MB shared video memory
Maximum allowed 1 GB (2 x 512MB)]

Ram (installed) 512 MB (1X512MB) up to 64 MB shared video memory
Maximum allowed 1 GB (2 x 512MB)
[/b]


but when you look up the Motherboard specifications it says it can handle max 2 gb:
http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&cc=us&dlc=&product=405460&docname=c00069442#c00069442_doc


Support up to maximum 2 GB memory [b said:
(PC manufacturer's maximum memory may differ)]

Support up to maximum 2 GB memory (PC manufacturer's maximum memory may differ)
[/b]

so who should i go with the Mobo manufacture or HP?

and should i get 1 stick of 1gb ram or should i get 2 sticks of 512. i read somewhere:

today's ram does run faster in pairs, meaning 2x512MB chips, 2x1GB, and so on. but i don't know if that pertains to my older system, the specs are below
September 18, 2007 10:05:49 PM

Specs for the system:

SiSoftware Sandra

System
Manufacturer : HP Pavilion 061
Model : DW232A-ABA A510N
Version : 0n81211RE101KELUT10

System Chassis
Manufacturer : Hewlett-Packard
Type : Desktop
Can be locked : No

Mainboard
Manufacturer : ASUSTek Computer INC.
MP Support : 1 Processor(s)
MPS Version : 1.40
Model : Kelut
Version : 2.02
Serial Number : MB-1234567890
System BIOS : 02/09/2004-KM400-8237-6A6LYA0EC-00
Chipset : VIA KT400/A, KT600

System Memory Controller
Location : Mainboard
Error Correction Capability : None
Number of Memory Slots : 2
Maximum Installable Memory : 2GB
Bank0/1 - A0 : None None None None DIMM 512MB
Bank2/3 - A1 : Empty

Chipset 1
Model : ASUSTeK Computer Inc KM400 CPU to PCI Bridge
Bus(es) : ISA AGP PCI IMB USB FireWire/1394 i2c/SMBus
Front Side Bus Speed : 2x 200MHz (400MHz data rate)
Maximum FSB Speed / Max Memory Speed : 2x 166MHz / 2x 200MHz
Width : 64-bit
IO Queue Depth : 4 request(s)


Logical/Chipset 1 Memory Banks
Bank 0 : 256MB DDR-SDRAM 2.5-3-2-7 (tCL-tRCD-tRP-tRAS) CR2
Bank 1 : 256MB DDR-SDRAM 2.5-3-2-7 (tCL-tRCD-tRP-tRAS) CR2
Bank Interleave : 4-way
Speed : 2x 200MHz (400MHz data rate)
Multiplier : 1/1x
Width : 64-bit
Memory Controller in Processor : No
Power Save Mode : No
Fixed Hole Present : No

APIC 1
Version : 0.03
Speed : 20MHz
Multiplier : 1/2x
Maximum Interrupts : 24
IRQ Handler Engaged : Yes
Enhanced Support : Yes

Memory Module 1
Manufacturer : Siemens
Model : 64D64320GU6B
Serial Number : 020A3D12
Type : 512MB DDR-SDRAM
Technology : 16x(32Mx8)
Speed : PC2700U
Standard Timings : 2.5-3-3-7 (tCL-tRCD-tRP-tRAS)
Date of Manufacture : Thursday, April 15, 2004
Set Timing @ 167MHz : 2.5-3-3-7 (tCL-tRCD-tRP-tRAS)
Set Timing @ 133MHz : 2.0-2-2-6 (tCL-tRCD-tRP-tRAS)

Voltage Sensor(s)
CPU Voltage : 1.65V
+3.3V Voltage : 3.36V
+5V Voltage : 5.16V
+12V Voltage : 11.19V
-12V Voltage : 0.72V
Standby Voltage : 5.02V
Battery Voltage : 3.30V

AGP Bus(es) on Hub 1
Version : 3.05
Speed : 8x 80MHz (640MHz data rate)
Multiplier : 1/2x
Fast-Writes Enabled : No
Isochronous Mode Enabled : No
Addressing Enabled : 32-bit
Aperture Size : 64MB
September 18, 2007 11:35:55 PM

I have seen this before. I had a laptop that claimed 192MB of RAM max(which isn't a bit limit for RAM). I bought 2x256MB sticks and it worked great. I'd do whichever is higher(in this case 2GB). What I would do in your case is buy a 1GB stick, and do 1 GB and 512 to see if it works. Then if it does, get the second 1GB stick. If I had to put money on it, i'd bet 2GB works great(lasts long time).
!