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4gb vs. 8gb : 1333 vs. 1600. Please help

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Last response: in Memory
January 20, 2011 10:06:54 AM

Hi guys. I don't know much about ram and this is my first time building a computer.
So far, I already got 2500K, case, 120GB SSD, 620W PSU, 1920x1080 monitor, and mouse.
Now is time for picking rams.

First of all, I am not sure if I ever gonna need 8GB. I want to start from minimum of 4GB.
Second of all, are there noticable difference between 1333 and 1600? I also heard that frequency such as 7-7-7 is faster than 9-9-9.

I have never paid attention to timing and frequency before so I have never had chance to compare them in terms of speed.

So here are my questions.
1) are there noticable difference between 4gb and 8gb, 1333 and 1600, and 9-9-9 and 7-7-7?

2) newegg user review said whoever got 1600 had to go to BIOS and play with voltage setting to get 1600 otherwise it is 1333. I have never used BIOS before. Is this what people call Overclocking? isn't it dangerous for a person like me to play with voltage?

3) Would you recommend me rams that would be perfect fit for my situation? I am planning on getting Asrock extreme 4 p67 motherboard.

Thank you.

More about : 4gb 8gb 1333 1600

a b } Memory
January 20, 2011 7:05:59 PM

1) Not as much as you would think; read some reviews. Amount of memory will help drastically in some apps and not others; timings might be noticeable if you do things like video editing or benchmarking, but not otherwise.

2) Well, we were all once people like you. Yes, it's dangerous. You could, theoretically fry the motherboard or memory. If that's an acceptable risk, have fun playing with it! If you want to make playing with hardware a hobby, learn it. If you want to use your computer like it was a car, that is, it's a great tool but I let someone else tinker with it when it needs service, don't learn it.

3) Did you read the intro:
Nobody here can tell what is perfect for your situation without, at a minimum, knowing what exactly you will use the machine for.

For a quick build that you can use in the future for whatever you want without tinkering with it, skip the 1600, buy the 8 GB, even if it's overkill, so you will never find that you need more, leave the BIOS at defaults and go use the nice new tool without worrying what's inside it.
a b } Memory
January 20, 2011 7:15:54 PM

You have picked a nice setup. Similar to mine actually. :D 

I strongly recommend you buy 8GB RAM now (2x4GB DIMMS) and not 4GB. See this article for more detail on why: You can always add more later.

I would suggest 9-9-9-24 stock RAM that runs at 1.5v, not 1.65v. There have been lots of reports of trouble using 1.65v RAM. There are lots of choices that fit this: Corsair Vengence, G.Skill Ripjaw X, G.Skill Sniper and Kingston ValueRam. I have the Kingston stuff and have not had a single RAM issue todate. Read this link too:

Yes, you should go in the BIOS to check the settings but it isn't hard to do. Just read the owners' manual first. You can usually press F5 to load stock settings if you make a mistake. Use caution of course. If you need to play with the RAM settings, it is easy to do. You also set your overclocking in the BIOS but unless you need to, I suggest you stick with Turbo mode (3700) for now. I played with mine and got 4400 without any effort although the CPU does get warm. Some are getting over 5Gb stable with air cooling. It is a great platform and a low price!!!

Hope this helps.

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January 20, 2011 8:56:32 PM

I have been intrigued by the same question, I was about to open a new thread, OP please dont mind i if i post the same query here again, not trying to hijack the thread.

Earlier i thought that better CAS latency and tighter T1 timings means better the RAM, later i read couple of places that faster the frequency of ram better the speed. Now with sandy bridge i hear that anything above 1600 is an over kill, and wont have much effect on the performance. Hence the best bet is to go for 1333 or 1600. Now today i learn something new that 1.65v is not an ideal module instead 1.5v is a better one.

Well for now i am really confused on choosing a memory module. I am planning to build a i7 2600K with Asus Deluxe Mobo, thermalright Silver Arrow Cooler, GTX570, Corsiar Professional AX850 PSU. Still not able to decide about a good ram.

With the above considerations in mind please guide me on how this ram is?
This one has a CAS of 8 with T1 timings of 8-8-8-24 is 1600 Ripjaw 2x4 8Gb and is on 1.5v

I have been also looking into this memory module.. which is again on 1600 CAS 7 and T1 tighter timings.. but is on 1.65v

Please guide.

a c 108 } Memory
January 20, 2011 9:10:31 PM

1. Read this to answer your question

2. Y wanted 1600 with 1156 / 1366 cause using the default memory multiplier of 8, you could adjust BCLK to take a 2.66GHZ CPU to 4.0 GHZ.

BCLK 133 x 20 CPU multiplier = 2.66 GHz
BCLK 133 x 8 CPU multiplier = 1066 MHz

BCLK 200 x 20 CPU multiplier = 4.00 GHz
BCLK 200 x 8 CPU multiplier = 1600 MHz

Another OC
BCLK 160 x 20 CPU multiplier = 3.20 GHz
BCLK 160 x 10 CPU multiplier = 1600 MHz

With the 1155 chipset, the CPU multiplier is unlocked so witha BCLK of 100, you can raise the CPU multiplier to 46 and get a 4.6 OC.....getting BCLK above 105 seems to be a real tough while you can still change the memory multiplier to OC the RAM via the BIOS so to speak, the entire system isn't benefitting from the OC since BCLK is still low

There seems to be a lot of confusion about RAm voltage ratings, when ya look at the SPD, I find that most 1.65 rated RAM is 1.5 V at 800, 1066, 1333 and only 1.65 at the XMP setting of 1600.

With CAS 6 at $80, I been using these in 4 GB systems, sometimes opting for two sets

In CAS 9, (2 x 4GB) builds, I use these for $110:
a c 196 } Memory
January 20, 2011 10:03:34 PM

1)a. There is no noticeable difference in real application (vs. synthetic benchmark)performance or FPS between 1333 1nd 1600 speed ram. Think 1-3%
Synthetic benchmarks will look good though, but are meaningless.
1)b. Lower timings are better, but not enough better to pay the premium that competitive overclockers will pay for the best. Again think 1-3% real impact.
1)c. Extra ram can only be good. How good depends on what you are doing. Some apps, like photoshop can use lots of ram to improve performance.
Here is some idea of the benefit of 8gb vs. 4gb:

2) You will need to use the bios if you build your own. It is not hard, particularly with the new asus P67 motherboards which have a web page like interface.
You will use the bios to select boot order, and to set the system time. With a 2500K, and a P67 motherboard, you can overclock, but the chip is so good that you may find no real need to. Overclocking on the K chips consists of increasing the maximum multiplier that the cpu can go to if cooling is good enough. So long as you leave voltages on auto, you are safe.

As to ram settings, just leave them alone with the auto defaults. everything will work just fine. There are settings to increase the ram speed, but you will then get slower timings, so there is not much benefit of doing so.

3) This is the g.skil ram I got for my Asus P8P67-M PRO:
It works well, but I suspect that the cheaper 1333 version would do.

Regardless, you will want 1.5v ram.

With 8gb of ram, you will need Windows-7 home premium 64 bit or better.
March 29, 2011 6:40:43 PM

I have been wondering this myself. I'm putting a sandy bridge system together and so far have found that 1333 runs about the same as 1600.

I just picked up 8gb (2x4gb) of Mushkin enhanced silverline to put into the new build I'm currently working on.

Such a great price for basically the same performance. The extra money can go toward another gtx 580 etc.. :)