Helpful ReplyMatched pairs RAM - Is this still a thing

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Kamikaze
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2016/12/11 09:24:33 (permalink)

Matched pairs RAM - Is this still a thing

I recently discovered that my Laptop has a second slot. The info I had when I bought it was that it had just one. My model number has a few configurations, and I kept seeing that models had a max of 16GB with 2 x8. HP engineer had it apart the other day, and when I asked hi to check, he whipped out the single 8GB and confirmed it has 2 slots and a maximum of 16GB (I've noticed slot info is also shown in task Manager now (not sure if it used to)).
 
I was taught not to just handle RAM unless you are earthed. I had corrupted new RAM on my old EMU 6400 when I upgraded. Even though I thought I was earthed (earth strap) I couldn't be sure if I corrupted the RAM, or if it came that way.
 
They way the HP Engineer handled it, was no surprise. Even when you buy ram here, someone just after you pay will whip it out the packaging and stick a sticker direct onto a chip, with no concern over static.
 
So I'm thinking, maybe I should get a matched pair, from overseas (to avoid shop staff handling), then move this current 8 to my work laptop,
 
Is there a benefit to both RAM chips being the same type? Do I need to think about matched pair. or should I just get another 8, chuck it in and stop overthinking. I can't earth myself anyway, they don't seem to have anything connected to earth.

 
#1
fireberd
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Re: Matched pairs RAM - Is this still a thing 2016/12/11 09:37:51 (permalink)
You should always install memory in "pairs" - same brand/type for best performance.  With only one memory module its not running "dual channel" which is needed for best performance (two 4GB RAM modules is better than one 8GB).
 
Before you just randomly order memory, you must get compatible memory that includes the type and speed.
Also avoid the Kingston Value Ram (VR) as it is crap and almost always saw problems with the Value Ram on the Dell forums.  The higher priced Kingston is OK.  
 
You can check what is needed on the Crucial Memory site (what we always advised on the Dell forum for non-Dell as it was guaranteed to work in a Dell, and probably the same applies to a HP).
www.crucial.com

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#2
Kamikaze
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Re: Matched pairs RAM - Is this still a thing 2016/12/11 10:17:08 (permalink)
My specific model doesn't seem listed on Crucial, but it was their ram I was thinking of.
I had seen this on amazon
https://www.amazon.co.uk/Crucial-PC3-12800-SODIMM-204-Pin-Memory/dp/B008PSEHAS/ref=pd_sbs_147_2?_encoding=UTF8&psc=1&refRID=GXY4KDJ6PMWSW6R9RH2X
 
SSDs seem about the same price here, so I I think I'd do that at the same time.
My father is visiting in January, so I think I'll get him to bring some RAM

 
#3
Kamikaze
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Re: Matched pairs RAM - Is this still a thing 2016/12/11 10:27:55 (permalink)
Just ran their system scanner. Which seems to say 8gb is the max, or am I reading that wrong
http://www.crucial.com/us...nview/04FE733F31D926C3

 
#4
fireberd
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Re: Matched pairs RAM - Is this still a thing 2016/12/11 10:33:39 (permalink)
I found an 8 GB memory module, that is the same as the part number listed in the HP manual for your model.
That would be cheaper than buying new memory.  It would give you the same part number so it would be a "pair"
http://www.impactcomputers.com/693374-005.html

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#5
Kamikaze
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Re: Matched pairs RAM - Is this still a thing 2016/12/11 10:58:18 (permalink)
Thanks for doing that. I'm just looking to see if that's available in the UK.
 
Where did you get that part number from, or is it just HP's RAM of the same spec?
 
 
 
 

 
#6
Kamikaze
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Re: Matched pairs RAM - Is this still a thing 2016/12/11 11:01:30 (permalink)

Your HP - Compaq ENVY 15 (4th Gen Intel Core)

system specs as shipped


memory

*Not to exceed manufacturer supported memory.
8GB
 
This is from the scan, is it say 8gb is my systems ram, or that 8gb is the maximum supported memory
http://www.crucial.com/us...nview/04FE733F31D926C3
 

 
#7
abacab
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Re: Matched pairs RAM - Is this still a thing 2016/12/11 11:39:47 (permalink)
Kamikaze

Your HP - Compaq ENVY 15 (4th Gen Intel Core)

system specs as shipped


memory

*Not to exceed manufacturer supported memory.
8GB

This is from the scan, is it say 8gb is my systems ram, or that 8gb is the maximum supported memory
http://www.crucial.com/us...nview/04FE733F31D926C3




That scan says "system specs as shipped".  8GB.
 
The max manufacturer supported memory would involve two things:
1. Number of physical RAM slots.  Check!  You found two...
2. Is the BIOS capable of handling additional RAM?  Probably, but to be sure check with HP support, or post on their forum.
 
I agree with Firebird's advice on the RAM matching.  I have also found that if you mix two different speeds of RAM, the whole memory bus will run at the slowest latency and frequency of the module with lowest common spec.

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#8
Kamikaze
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Re: Matched pairs RAM - Is this still a thing 2016/12/11 11:50:40 (permalink)
Yeah I think buying a pair, and moving the existing 8 to my single slotted work laptop (which supports up to 8, but has 2) will be the best option. Seems less messy with getting the pairing right.

 
#9
Kamikaze
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Re: Matched pairs RAM - Is this still a thing 2016/12/11 12:22:14 (permalink)
Wow, I cannot see the actual specifications for this machine. Set on a loop of inputing the product number G0T59AV, Selecting how to see how much ram I can add, which says deduct what's installed from the specified max, which I find by entering my product number and starting the loop again.
 
http://support.hp.com/us-en/product/HP-ENVY-15-k100-Notebook-PC/7234894/model/7415731/manuals
 
this pdf is linked and says 16 is the max
http://h10032.www1.hp.com/ctg/Manual/c04434142
 
but refers to the range in general and doesn't confirm my machine.
 
I'm going to guess it's 16 as there are 2 slots and a factory 8 in the first
 
Memory
Two SODIMM slots
DDR3L-1600 MHz Dual Channel Support
Supports up to 16 GB of system RAM in the following configurati
ons:


4096 MB total system memory (4096×1)

8192 MB total system memory (4096×2)

8192 MB total system memory (8192×1)

12288 MB total system memory (8192×1 + 4096×1)

16384 MB total system memory (8192×2

 
#10
abacab
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Re: Matched pairs RAM - Is this still a thing 2016/12/11 12:56:33 (permalink)
http://www.tomshardware.c...-ddr3-module-size.html
For all intents and purposes, 8GB is the maximum available for a single stick of normal (non-ECC) DDR3 RAM. While the chipset on the laptop may support 32GB, the chipset is likely used in many different laptops from many different manufacturers; some manufacturers will equip their laptops with 4 slots, and some with 2 slots. With 2 slots you're essentially limited to 16GB, regardless of the fact the chipset can cope with 32GB.

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#11
Kamikaze
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Re: Matched pairs RAM - Is this still a thing 2016/12/11 13:05:28 (permalink)
I think several things are pointing towards it being 2x8gb maximum. I'll contact HP support here, and see if they can actually give me my systems factory specification. Product number and the word specification is supposed to bring it up on a search of the HP site, but doesn't. Other searches seem to suggest 16 max too.

 
#12
drewfx1
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Re: Matched pairs RAM - Is this still a thing 2016/12/11 13:12:44 (permalink)
FYI - I use a free program called CPU-Z, which shows low level system info, including the memory timing info, part numbers and whatnot:
 
http://www.cpuid.com/softwares/cpu-z.html
 
Highly recommended.

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#13
abacab
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Re: Matched pairs RAM - Is this still a thing 2016/12/11 13:24:26 (permalink)
drewfx1
FYI - I use a free program called CPU-Z, which shows low level system info, including the memory timing info, part numbers and whatnot:
 
http://www.cpuid.com/softwares/cpu-z.html
 
Highly recommended.




+1
 
Another good freebie is this one, it lets you dive into details for all of your CPU, RAM, motherboard devices, drives,  and ports.
https://www.hwinfo.com/

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#14
Sycraft
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Re: Matched pairs RAM - Is this still a thing 2016/12/11 13:51:08 (permalink)
RAM is best done in pairs (or sometimes triples or quads) but it doesn't have to be matched as in two identical sticks. The reason for sets is memory controllers have multiple channels and can read/write to more than one stick at once. Normal desktop systems are dual channel. Older high end systems and some servers were triple channel. Current high end systems and servers are quad channel.
 
So what is important in multi-channel RAM is both sticks need to be the same size, and they should be the same speed (if not the faster one will be slowed down to the slower one's speed). They can be from different vendors though, that is no issue normally.
 
Now all that said, occasionally you find systems that are extremely fussy and everything has to be perfect RAM wise. They'll only work with the specific stuff they want and refuse otherwise. But for 99.999% of consumer hardware all that matters is two sticks that are the same size and speed and they are happy.
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abacab
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Re: Matched pairs RAM - Is this still a thing 2016/12/11 14:12:28 (permalink)
It's not a law, but it is a great suggestion!
 
According to my ASUS motherboard manual:
 
"Always install DIMMs with the same CAS latency.  For optimal compatibility, we recommend that you install memory modules of the same version or date code (D/C) from the same vendor.  Check with the retailer to get the correct memory modules."
 
Have always done this, and never had an issue with RAM.  Been building computers for over 15 years. 

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Kamikaze
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Re: Matched pairs RAM - Is this still a thing 2016/12/11 21:27:33 (permalink)
Thanks guys. I think I'm sold on buying a pair, and moving the current 8 to my work laptop. I don't need 8 in my work laptop, but more than 2 will help. So It seems obvious to move the 8 and get buy a pair to make sure they are identically spec'd.
 
I'll probably put an ssd in my Music laptop at the same time. It has a CD drive I considered getting a caddy for and putting an SSD in there. But I don't push my hardrive hard enough, so I think I think a single SSD with suffice. I can add a HDD to that slot if I need to in the future.
 
I maye test run the SSD with a small 124 ssd for my work laptop.  Fast load up times will really help my work, more than my music. 5-7 year olds have very short attention spans. You can loose a class just waiting for a song to load.  

 
#17
abacab
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Re: Matched pairs RAM - Is this still a thing 2016/12/11 22:30:18 (permalink)
Kamikaze
Thanks guys. I think I'm sold on buying a pair, and moving the current 8 to my work laptop. I don't need 8 in my work laptop, but more than 2 will help. So It seems obvious to move the 8 and get buy a pair to make sure they are identically spec'd.
 
I'll probably put an ssd in my Music laptop at the same time. It has a CD drive I considered getting a caddy for and putting an SSD in there. But I don't push my hardrive hard enough, so I think I think a single SSD with suffice. I can add a HDD to that slot if I need to in the future.
 
I maye test run the SSD with a small 124 ssd for my work laptop.  Fast load up times will really help my work, more than my music. 5-7 year olds have very short attention spans. You can loose a class just waiting for a song to load.  




Yup, there are a few other threads in the computer forum discussing the best placement for SSD's.  In my experience, the system drive is the most effective SSD upgrade.  If you locate the Windows boot partition here, along with your program folders you will see a huge boost in boot speed, as well as with launching applications

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mettelus
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Re: Matched pairs RAM - Is this still a thing 2016/12/11 23:07:18 (permalink)
I am not sure if this has been mentioned above, but the MB specs should have the RAM reqts (both physical and OC capability) listed. The OC would be specific to the BIOS, but the MB specs would say what the board is capable of, and the BIOS should match accordingly. I didn't catch in this thread (may have missed it) if you had pulled the actually MB specs though. (I did a quick look on the links above but didn't find a MB model listed.)

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Kamikaze
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Re: Matched pairs RAM - Is this still a thing 2016/12/12 05:02:14 (permalink)
I can't find the specs, I just go in a loop on the HP site.

 
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AntManB
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Re: Matched pairs RAM - Is this still a thing 2016/12/12 08:19:47 (permalink)
Here's your model on Amazon with 16GB installed so it looks like it supports it.
 
https://www.amazon.co.uk/HP-15T-K100-i7-4710HQ-Speakers-Subwoofers/dp/B00ZD695NE
 
It also states that 16GB is the maximum capacity.
 
AMB
 
#21
Kamikaze
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Re: Matched pairs RAM - Is this still a thing 2016/12/12 09:08:19 (permalink)
Thanks. I've seen a few models that also indicate this, but never my product. I had a look at the reviews, as there was only 2. This first two sentences could have been written by me.
"In less than 3 months I had to buy a new charger. And now, after 6 months only the battery doesn't charge."
Although the battery does charge, but windows says it doesn't

 
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Jim Roseberry
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Re: Matched pairs RAM - Is this still a thing 2016/12/14 16:37:47 (permalink) ☄ Helpfulby DrLumen 2017/01/01 00:38:26
Mixing RAM type invites compatibility issues.
Absolutely make sure to have matching RAM sticks.

Best Regards,

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burgerproduction
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Re: Matched pairs RAM - Is this still a thing 2016/12/28 14:24:05 (permalink)
Hi Kamikaze,
I've got an HP which I recently updated the RAM on. I had exactly the same headache as you.
The HP site didn't list my model. Crucial told me I needed a particular speed of RAM (which I bought only to find it wasn't compatible). Don't trust the Crucial scanner....it doesn't give correct results.
In the end, the guys on the HP support site game me the best advice.
HP models can be particularly picky with RAM types. Make sure you use the same type as is installed (DDR2, DDR3 etc..) and the same speed. G-Skill is a brand of RAM which works with HP. I bought it and it worked on mine, and many people on the HP site said it worked with their laptops.
If in doubt, as an Expert on the HP site.
BTW: I'm running 6GB or RAM (one 2GB+4GB) of different brands, and I don't seem to have any problems.
Having said that, I am going to get a matching stick very soon, to bump mine up to 8GB.

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#24
DrLumen
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Re: Matched pairs RAM - Is this still a thing 2017/01/01 00:50:04 (permalink)
Part of the issue is HP/Compaq is showing that to be a Config To Order (CTO) system. It will have a blanket top tier model but not a unique specific model number for your machine. Try checking the warranty with the serial and see what model it returns. If the warranty check requires you to enter a model# just enter AAAAA - 5 or 6 A's (whatever the site requires). If you get a valid return, it will show the actual model# for you to use.
 
Even at that though, don't be surprised to find inconsistencies. It has been said that Compaq is not really sure exactly what parts were installed as they source and use the lowest priced parts on a weekly basis.
 
If you want to PM your serial and the suspected model number I will see what I can find. I have quite a bit of experience with the compaq site and can use a vendor login if needed.

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#25
Kamikaze
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Re: Matched pairs RAM - Is this still a thing 2017/01/01 02:23:53 (permalink)
Yeah, I've exhausted the site options, and searches.
 
I'm just going to buy a pair, and put the existing 8gb in my new work laptop, in place of it's 2gb
 
 

 
#26
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