RAM upgrade from 0,5 GB to 2,5GB help needed

First will Xp reckognize 2,5gb ram
my manual says (i have toshiba Sat pro A100-828) it can do max 4GB ram(it does have two slots only)
and it can be upgraded with following

PC4200 and sodimm-200

second the ram i want to buy is this will it work (worth 60£ or not)

CAS Latency : CL4
Voltage: 1.8 V
Memory Frequency: 533 MHz
Memory technology: DDR II SDRAM
capacity: 2 GB
Model: SO DIMM 200-pin
Modulkonfiguration: 256 x 64
Upgrade type: Industristandard
RAM: DRAM
Ram sokkel: SO DIMM 200-PIN
Registreret eller buffered: Ikke bufferet
Model: SO DIMM 200-pin
Number of devices: 1
Type: Memory
Product code: KVR533D2S4/2G


Review/more info
Kingston is the world's largest independent memory manufacturer. In today's performance-driven environment, memory upgrades provide an easy, economical alternative to increase system performance. Every memory product Kingston offers is designed to help you get maximum performance at the best price to you.This memory is designed for the following systems:AOpen MP945-VXR Series;AOpen MP945-X Series.

 

Yes it will if you mean 2.5GB. I would not do 2.5 read other threads on 1st or second page of this section to learn why. I would buy 2X1GB sticks. About $60 to $80.

 

£60 for a 2GB ram stick is about right for UK prices. Yes XP will recognise 2.5GB of ram.

 

i read that but i have the stupid hypermemory(atix1600128mb>>>521mb) so i thought that those 500mb goes to video while rest runs the pc? isnt it far better like this ?

 

Don't think it works like that (allocation) so you only have 1GB running in "dual channel" out of 2.5 and in a perfect theoretical world at best 40% chance of using 128 bit bus but really much less, I do not think the 1/2GB is worth that. A 3GB config at least has a 67% shot in a theoretical world and gives 1/2GB more wich is 2GB running dual. Just my opinion many disagree.

 

so conclusion must be replacing the 512mb ram with 2 *1 gb ram for 50£ is more valuable than adding additional 2gb of ram?

*my pc does not support dual channel!

 

If it does not support "dual channel" then forget everything I have said and 2.5 is fine!!!!!!!! Can't believe does not support Dual channel but if so more RAM better any config!

 

I think you are wrong the Intel 945 chipset supports DDR2 "dual channel" RAM so if true don't forget anything I said!!!!!!!!!! 2X1GB or 1X1GB + 1X2GB! Nothing wrong w/using 512MB stick as a paper wieght!

 

the crucial test which is also little bit stupid says that my pc does not support dual channel but it also says that i can only take max 1gb of ram per module which is obviously a lie

 

Mine says the same and it is wrong so do not trust that, I have called them and talked to them about that they have no answer. CPU-Z is better and free if you are still unsure. I have used that and SiSoft Sandra (free) says I have a 128 bit bus which means dual channel.

 

Thanx Powerpack i will definitely consider dual channel it shows that i have it!

 

cpu-z says that the current ram has 64 bit bus bandwith

 

Where? Which tab? Also don't you have 1 stick 512MB RAM anyway? Which 64 bit would be correct.

 

yeah i have one stick samsung pc2-4300(266mhz) so-dimm 512mb ram says cpu-z

 

OK but where are you seeing 64 bit? I only ask because on mine I do not see. But 64 is right since you only have 1 stick. If you ever download SiSoft Sandra I would like to know your bandwidth.

 

I dont really get it toshiba says this note book can handle 4gb while the test i recently runned says it only can have max 2GB
here are the results
SiSoftware Sandra

System
Manufacturer : TOSHIBA
Model : SATELLITE PRO A100
Version : PSAACE-00V00VED


System Chassis
Manufacturer : No Enclosure
Can be locked : No
Version : N/A
Serial Number : None
Asset Tag : No Asset Tag
Boot-up State : Safe
Power State : Safe
Thermal State : Safe
Security State : External Interface Locked-out

Mainboard
Platform Compliance : Intel Centrino Mobile Technology
Manufacturer : Intel Corporation
Multi-Processor (MP) Support : 1 Processor(s)
MPS Version : 1.40
Model : CAPELL VALLEY(NAPA) CRB
Version : Not Applicable
Serial Number : Not Applicable

On-board Devices
HD-Audio : Sound Adapter (Disabled)

System Memory Controller
Location : Mainboard
Error Correction Capability : None
Number of Memory Slots : 2
Maximum Installable Memory : 2GB
Bank 0 - M1 : SO-DIMM Synchronous DDR2-SDRAM 512MB/32 @ 533Mt/s
Bank 1 - M2 : Empty

Chipset 1
Model : Toshiba America Information Systems 955XM/945GM/PM/GMS/940GML Express Processor to DRAM Controller
Revision : A4
Bus : Intel AGTL+
Front Side Bus Speed : 4x 166MHz (664MHz data rate)
Maximum FSB Speed : 4x 200MHz (800MHz data rate)
Width : 64-bit
I/O Queue Depth : 12 request(s)
Maximum Bus Bandwidth : 5312MB/s (estimated)

Chipset 1 Hub Interface
Type : DMI (Direct Media Interface)
Version : 1.00
Number of Ports : 4
In/Out Width : 4-bit / 4-bit
Multiplier : 3/1x
Speed : 1x 100MHz (100MHz data rate)

Logical/Chipset 1 Memory Banks
Bank 0 : 256MB DDR2-SDRAM 4.0-4-4-11 (tCL-tRCD-tRP-tRAS) CR1
Bank 1 : 256MB DDR2-SDRAM 4.0-4-4-11 (tCL-tRCD-tRP-tRAS) CR1
Supported Memory Types : DDR2-SDRAM
Channels : 1
Memory Bus Speed : 4x 132MHz (528MHz data rate)
Maximum Memory Speed : 4x 167MHz (668MHz data rate)
Multiplier : 4/5x
Width : 64-bit
Memory Controller in Processor : No
Refresh Rate : 7.80µs
Power Save Mode : No
Fixed Hole Present : No
Maximum Memory Bus Bandwidth : 4224MB/s (estimated)

APIC 1
Version : 2.00
Multiplier : 1/2x
Maximum Interrupts : 24
IRQ Handler Engaged : Yes
Enhanced Support : Yes

Memory Module 1
Manufacturer : Samsung
Model : M4 70T6554CZ3-CD5
Serial Number : F4492FCC
Type : 512MB DDR2-SDRAM SO-DIMM
Technology : 8x(32Mx16)
Speed : PC2-4300U DDR2-267
Standard Timings : 4.0-4-4-11 (tCL-tRCD-tRP-tRAS)
Version : 1.2
Date of Manufacture : 14. januar 2007
Memory DC Line : 1.8V
Set Timing @ 267MHz : 5.0-4-4-11 (tCL-tRCD-tRP-tRAS)
Set Timing @ 267MHz : 4.0-4-4-11 (tCL-tRCD-tRP-tRAS)
Set Timing @ 200MHz : 3.0-3-3-8 (tCL-tRCD-tRP-tRAS)

Environment Monitor 1
Model : Intel Core CPU [P1, C2, M1]
Version : 15.06
Mainboard Specific Support : No

Temperature Sensor(s)
CPU Temperature : 47.0°C / 116.6°F td

 

I studied what yours said and compared to mine. SANDRA is somtimes wrong. Says mine has 4 memory slots and I now it only has 2, it says I can install 4GB but My MFG says only 2GB. I guess I would trust the MFG you have an Intel MoBo I will see if I can find. Could you run the Memory Bandwidth benchmark and report your speed?

 

im on the job

 

If your laptop's manual says it can only handle max 1GB per slot (2GB total), then it might just be true. I wouldn't attempt to use more memory than that without getting a definitive answer from the manufacturer.

And no, SiSoft or CPU-Z aren't really relevant here, since this might be a bios-specific limitation or something else that they don't recognize.

And now, you won't be able to run dual-channel unless both RAM sticks are exactly the same size. a 2GB and a 512MB will only run in single channel.

However, usually, the performance boost of dual-channel is only a couple of percent, so it's not all that important.

 

Cool if and when you have time can your run "memory bandwidth" and "cache and memory" bench marks in SiSoft and post here?

 

im on school so i will have results in 3 hours

and can someone tell me if kingston wants me to buy a much more expensive module or is it true that it will be incompatible

With regards to your query we can advise that the memory module with the part number KVR533D2S4/2G is a ValueRAM generic memory module. These modules are manufactured according to general technical specifications of motherboards and meet the JEDEC standard. However, they are not tested on any motherboard and therefore we cannot guarantee compatibility of these modules with a specific system.

According to the information about your system that you have provided, we would suggest that you use the memory module with part number (see link):

http://www.ec.kingston.com/ecom/con...ite+Pro+A100-828&distributor=0&submit1=Search

These parts are designed to be used on a Toshiba Sattelite pro A100-828 and have been tested on this machine. Therefore we guarantee compatibility and provide help in case of any trouble.

Although technical specifications are quite similar we do not recommend that you use the module KVR533D2S4/2G on Toshiba as we will not provide you with either technical support or a replacement.

We trust that the above information will be of assistance to you.

 

They are messing with peoples ignorance, that JEDEC standard they mention is what is important. They are trying to sell you a different kind that “coincidently” costs more. I went on NewEgg http://www.newegg.com/Store/SubCategory.aspx?SubCategory=381&name=Laptop-Memory
You do not need to buy a kit (I only saw one) just buy 2 of the same. Remember it is not the RAM itself that is dual channel it is the MoBo that does that. You should expect to pay about $80 to $90 (2X1GB) after tax and S&H. One advantage of 2X1GB is you should should be able to up the speed from 533Mhz to 667Mhz it looks like your system supports. Do make a separate thread asking once you have picked out so someone else can confirm. Pick a PC4200/4300 DDR2 200pin SODIMM (533Mhz) and PC5300/5400 DDR2 200pin SODIMM in case the faster is in fact not compatible. Cas Latency of 4 is standard for 4200, 5 for 5300 anything lower better but costs more. On your link it said your system uses both 533Mhz and 667Mhz, so that is why I think you can use the faster. Brand does not really matter, but nothing wrong spending a few more dollars if it makes you feel better, lots of brand names on the site for good price.

 

Memory bandwith
Benchmark Results
RAM Bandwidth Int Buff'd iSSE2 : 3248 MB/s
RAM Bandwidth Float Buff'd iSSE2 : 3245 MB/s
Results Interpretation : Higher index values are better.

Int Buff'd iSSE2 (Integer STREAM) Results Breakdown
Assignment : 3221MB/s
Scaling : 3198MB/s
Addition : 3290MB/s
Triad : 3284MB/s
Data Item Size : 16 byte(s)
Buffering Used : Yes
Offset Displacement Used : Yes
Bandwidth Efficiency : 77% (estimated)

Float Buff'd iSSE2 (Float STREAM) Results Breakdown
Assignment : 3195MB/s
Scaling : 3200MB/s
Addition : 3303MB/s
Triad : 3284MB/s
Data Item Size : 16 byte(s)
Buffering Used : Yes
Offset Displacement Used : Yes
Bandwidth Efficiency : 77% (estimated)

Performance Test Status
Run ID : YOUR-946E80F7CF on 21. august 2007 at 17:01:50
Platform Compliance : Win32 x86
Memory Used by Test : 255MB
NUMA Support : No
SMP Test : No
Total Test Threads : 1
Multi-Core Test : Yes
SMT Test : No
Dynamic MP/MT Load Balance : No
Processor Affinity : P0C0T0
System Timer : 3.6MHz
Page Size : 4kB
Use Large Memory Pages : No

Features
SSE Technology : Yes
SSE2 Technology : Yes
SSE3 Technology : Yes
Supplemental SSE3 Technology : Yes
SSE4 Technology : No
EMMX - Extended MMX Technology : No
SSE4A Technology : No
HTT - Hyper-Threading Technology : No

Chipset 1
Model : Toshiba America Information Systems 955XM/945GM/PM/GMS/940GML Express Processor to DRAM Controller
Front Side Bus Speed : 4x 166MHz (664MHz data rate)
Width : 64-bit
Maximum Bus Bandwidth : 5312MB/s (estimated)

Logical/Chipset 1 Memory Banks
Bank 0 : 256MB DDR2-SDRAM 4.0-4-4-11 (tCL-tRCD-tRP-tRAS) CR1
Bank 1 : 256MB DDR2-SDRAM 4.0-4-4-11 (tCL-tRCD-tRP-tRAS) CR1
Channels : 1
Speed : 4x 132MHz (528MHz data rate)
Width : 64-bit
Memory Controller in Processor : No
Maximum Memory Bus Bandwidth : 4224MB/s (estimated)

Performance Tips
Notice 5008 : To change benchmarks, click Options.
Notice 5004 : Synthetic benchmark. May not tally with 'real-life' performance.
Notice 5006 : Only compare the results with ones obtained using the same version!
Tip 2 : Double-click tip or press Enter while a tip is selected for more information about the tip.

CACHe and memory
SiSoftware Sandra

Benchmark Results
Combined Index : 11922 MB/s
Results Interpretation : Higher index values are better.
Speed Factor : 39.8
Results Interpretation : Lower index values are better.

Float SSE2 Cache/Memory Results Breakdown
Data Item Size : 16 byte(s)
Buffering Used : No
Offset Displacement Used : Yes

Benchmark Breakdown
2kB Blocks : 66419 MB/s
4kB Blocks : 74053 MB/s
8kB Blocks : 78905 MB/s
16kB Blocks : 79367 MB/s
32kB Blocks : 79379 MB/s
64kB Blocks : 69099 MB/s
128kB Blocks : 22433 MB/s
256kB Blocks : 22475 MB/s
512kB Blocks : 22510 MB/s
1MB Blocks : 22517 MB/s
4MB Blocks : 4324 MB/s
16MB Blocks : 1994 MB/s
64MB Blocks : 2012 MB/s
256MB Blocks : 1998 MB/s

Performance Test Status
Run ID : YOUR-946E80F7CF on 21. august 2007 at 17:04:19
Platform Compliance : Win32 x86
NUMA Support : No
SMP Test : No
Total Test Threads : 2
Multi-Core Test : Yes
SMT Test : No
Dynamic MP/MT Load Balance : No
Processor Affinity : P0C0T0 P0C1T0
System Timer : 3.6MHz
Page Size : 4kB
Use Large Memory Pages : No

Processor
Model : Intel(R) Core(TM)2 CPU T5500 @ 1.66GHz
Speed : 1.66GHz
Cores per Processor : 2 Unit(s)
Type : Mobile, Dual-Core
L2 On-board Cache : 1x 2MB ECC Synchronous, ATC, 8-way set, 64 byte line size, 2 threads sharing

Features
SSE Technology : Yes
SSE2 Technology : Yes
SSE3 Technology : Yes
Supplemental SSE3 Technology : Yes
SSE4 Technology : No
EMMX - Extended MMX Technology : No
SSE4A Technology : No
HTT - Hyper-Threading Technology : No

Chipset 1
Model : Toshiba America Information Systems 955XM/945GM/PM/GMS/940GML Express Processor to DRAM Controller
Front Side Bus Speed : 4x 166MHz (664MHz data rate)
Width : 64-bit
Maximum Bus Bandwidth : 5312MB/s (estimated)

Logical/Chipset 1 Memory Banks
Bank 0 : 256MB DDR2-SDRAM 4.0-4-4-11 (tCL-tRCD-tRP-tRAS) CR1
Bank 1 : 256MB DDR2-SDRAM 4.0-4-4-11 (tCL-tRCD-tRP-tRAS) CR1
Channels : 1
Speed : 4x 132MHz (528MHz data rate)
Width : 64-bit
Memory Controller in Processor : No
Maximum Memory Bus Bandwidth : 4224MB/s (estimated)

Performance Tips
Notice 5008 : To change benchmarks, click Options.
Notice 5004 : Synthetic benchmark. May not tally with 'real-life' performance.
Notice 5006 : Only compare the results with ones obtained using the same version!
Tip 11 : Use the 'Switch Chart Type' button to switch between Detailed and Combined charts.
Warning 5009 : Mobile processors yield lower indexes in power management modes. Check power settings if index is low.