Need help with RAM

[Lon3_Wolfie]

So I'm planning to eventually get a RAM upgrade for my laptop. It is running on an AMD A10-5757M with dual graphics. So anyways. From what I managed to dig up, is that G.Skill is one of the better companies to get RAM from. This is kind of a stupid question since it's probably obvious, but I want to know for sure how much of a difference in performance there would be between getting this:

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231704

1600 MHz CAS 9 (9-9-9-28) @ 1.35V

and this: 

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231708

1866 MHz CAS 10 (10-10-10-32) @ 1.35V

 

I'm just having a hard time because both run at 1.35v...if the 1866 was at 1.5, then I would just say screw it and get the 1600 since again, it's for a laptop. As shown in the link, I am only getting 1 stick. As I only have 1 slot...so as I've asked plenty of times. Which one should I get? Or should I look at another company? The price isn't really a factor unless I'm going to be paying an insane amount for only 1 stick of 8 GBs. I would just prefer something that will give me the best performance without requiring me to cut my battery life in half. 

[CoolaxGaming]

Corsair would be nice option

[tmlhalo]

Integrated graphics work better with higher MHz ram. So the 1866 MHz ram. It also has better latency.

[Lon3_Wolfie]

Corsair would be nice option

I did look at corsair, but the amount of volts required doesn't appeal to me, nor the latency that is higher.

[Lon3_Wolfie]

Integrated graphics work better with higher MHz ram. So the 1866 MHz ram. It also has better latency.

It's an Acer laptop with Insyde20 or what ever BIOS. So I cannot customize anything when it comes to hardware. So...I need to know for sure if it will run at 1866 by default without downclocking to 1600. 

[tmlhalo]

It's an Acer laptop with Insyde20 or what ever BIOS. So I cannot customize anything when it comes to hardware. So...I need to know for sure if it will run at 1866 by default without downclocking to 1600. 

Can you get me a model number? I will see what I can find.

[bcredeur97]

It's an Acer laptop with Insyde20 or what ever BIOS. So I cannot customize anything when it comes to hardware. So...I need to know for sure if it will run at 1866 by default without downclocking to 1600. 

for only $5 more you cant go wrong finding that out for yourself...

[Lon3_Wolfie]

Can you get me a model number? I will see what I can find.

Acer V5 552G-X412

[Lon3_Wolfie]

for only $5 more you cant go wrong finding that out for yourself...

The frequency can go down, but will the latency also go down automatically? Since 1600 MHz, doesn't automatically mean 9 CL. There is 1600MHz with higher CLs. Like the stick I currently have. Just only 4 GBs and CL of 11 (11-11-12-28-39) That $5 can easily turn to be quite a bit more if I have to pay for return shipping just to get something else. 

[CoolaxGaming]

Integrated graphics work better with higher MHz ram. So the 1866 MHz ram. It also has better latency.

Actually the 1600mhz has better latency

[tmlhalo]

Acer V5 552G-X412

This is probably my favorite tool from a company.

http://www.crucial.com/usa/en/compatible-upgrade-for/Acer/aspire-v5-552g-x412#memoryResults

One of the results is

http://www.crucial.com/usa/en/aspire-v5-552g-x412/CT5545220

DDR3 PC3-14900 • CL=13 • Unbuffered • NON-ECC • DDR3-1866 • 1.35V • 1024Meg x 64 •

So all good.

[tmlhalo]

Actually the 1600mhz has better latency

Nope, you don't use cas latency like that.

http://en.wikipedia.org/wiki/CAS_latency#Memory_timing_examples

[Lon3_Wolfie]

Actually the 1600mhz has better latency

That's why I'm asking as well. Will the increased speed overcome the latency going from 9 to 10? when it comes to performance? The 5757m is an APU...and as much as I wish to use the discrete GPU that is in here as well, I cannot do that. As the APU iGPU is used for stuff as well. EVEN if I did throw most of the stuff onto the GPU, my battery would last me about 1-2 hours if that. So...I kinda have no choice but to use the iGPU unless I really need the performance of my discrete GPU. 

[Lon3_Wolfie]

This is probably my favorite tool from a company.

http://www.crucial.com/usa/en/compatible-upgrade-for/Acer/aspire-v5-552g-x412#memoryResults

One of the results is

http://www.crucial.com/usa/en/aspire-v5-552g-x412/CT5545220

DDR3 PC3-14900 • CL=13 • Unbuffered • NON-ECC • DDR3-1866 • 1.35V • 1024Meg x 64 •

So all good.

CL13? That's gonna be even worse than the current stick I have with CL... 

Edit: Also, you're using Crucial's Tool...they are of course only gonna suggest their own products. That doesn't help me. I want something that gives the best performance out of all brands available that offer a single stick of 8 GBs. 

[tmlhalo]

CL13? That's gonna be even worse than the current stick I have with CL... 

Your motherboard can support 1866 Cas 10. That was simply an example one I picked from Cruical's products to show that 1866 MHz is supported. Also the 1866 MHz cas 10 has better latency than the 1600 MHz cas 9. Cas latency is based on clock speed. You can see this chart here for how many ns it takes to get the first, 4th, and 8th word from memory.

http://en.wikipedia.org/wiki/CAS_latency#Memory_timing_examples

[Lon3_Wolfie]

Your motherboard can support 1866 Cas 10. That was simply an example one I picked from Cruical's products to show that 1866 MHz is supported. Also the 1866 MHz cas 10 has better latency than the 1600 MHz cas 9. Cas latency is based on clock speed. You can see this chart here for how many ns it takes to get the first, 4th, and 8th word from memory.

http://en.wikipedia.org/wiki/CAS_latency#Memory_timing_examples

I apologize, as I completely missed the point you were trying to make with that. But thank you for putting it right infront of my face. So G.Skill 1866 it is then. 

[tmlhalo]

-snip-

I'm using Crucial's tool because it has an easy to use database of compatibility because finding information from an OEM is often difficult and time consuming. I don't recommend getting the stick I linked. It was simply an example to show your motherboard has support for 1866 MHz DRAM.

[tmlhalo]

I apologize, as I completely missed the point you were trying to make with that. But thank you for putting it right infront of my face. So G.Skill 1866 it is then. 

No problem, ignore the last post. I was typing it while you were typing.

[CoolaxGaming]

Nope, you don't use cas latency like that.

http://en.wikipedia.org/wiki/CAS_latency#Memory_timing_examples

Lower latency is better. Period.

[tmlhalo]

Lower latency is better. Period.

Yeah, 10.72 ns is lower than 11.25 ns which is why the 1866 MHz is better.