Best Of Tom’s Hardware: How To Build A PC

Remember The Memory!

The easy solution to any memory debate concerning the latest processors might sound simple: just buy 1.5 volt DDR3-1066 (PC3-8500). All Socket AM3, LGA 1156, and LGA 1366 processors are designed to support at least this memory speed. It's inexpensive as both 1GB and 2GB sticks and its available in both dual-channel and triple-channel kits. Yet there are small performance benefits for similarly-priced DDR3-1333 (PC3-10600), and this speed functions normally, even with processors that are not officially designated to use it (mostly early-model Core i7 processors based on the Bloomfield design, for example).

Moving up to DDR3-1600 (PC3-12800) requires a little more consideration. First of all, many DDR3-1600 modules require a nonstandard 1.65V BIOS setting or higher (up to 1.9V) simply to run at its rated speed. Most boards will automatically select 1.5V, which is why many modules are detected at a slower speed determined by the manufacturer to be stable at the lower voltage. This explains why neophytes have been seen rushing, upset, to the Tom’s Hardware Forums when their DDR3-1600 modules are detected as DDR3-1333 or DDR3-1066.

Intel XMP (Extreme Memory Profiles) and EPP 2.0 (Enhanced Performance Profiles) are competing technologies that add overclocking data to the automatic-detection ROM, telling certain motherboards exactly how to overclock some models of performance memory. The use of overclocking profiles still requires the builder to enter the BIOS and manually select the profile they want their motherboard to use, and the use of XMP or EPP 2.0 profiles often overclocks other parts of the system, too.

Memory faster than DDR3-1600 is usually expensive and not really required. Our tests have shown that faster memory doesn’t add noticeably to the performance of applications, and even overclockers can reach the limits of their other components without exceeding DDR3-1600 data rates by simply using a lower DRAM multiplier.

But what about low-cost systems that still use dated DDR2 memory? PC2-5300 (DDR2-667) is so common that 1GB modules can be found for as little as $25. Because it's so cheap, there's no need to choose slower PC2-4200 in any new system build, even if the processor runs at a slower bus speed. You might even do better and find DDR2-800 for the same price.

In terms of memory quantity, Tom's Hardware recommends at least 1GB for the cheapest single-task 32-bit Windows systems. Users with a 64-bit version of Windows should have at least 2GB for light tasks and 4GB for regular use of 64-bit programs or heavy multitasking. Users who run multiple memory-intensive programs simultaneously can usually live with 8GB, and those who need more than 8GB are probably completely aware of their needs already.

Our memory reviews show a wide range of options, and buying name-brand modules with lifetime warranties from reputable venders is good insurance against "unexplained" system instability.

This thread is closed for comments
32 comments
    Your comment
  • AndrewJacksonZA
    "the power supply is actually one of the more important parts of a build"
    Thank you!!

    Or rather, let's do what the cool kids are doing and rather post a GIF:
    https://giphy.com/gifs/the-office-thank-you-michael-scott-1Z02vuppxP1Pa
  • Eggz
    Great piece for a lot of first-time builders. This should have a sticky somewhere on the site so it doesn't get buried :-)
  • jkhoward
    Quote:
    "the power supply is actually one of the more important parts of a build" Thank you!! Or rather, let's do what the cool kids are doing and rather post a GIF: https://giphy.com/gifs/the-office-thank-you-michael-scott-1Z02vuppxP1Pa


    Seriously, not enough people realize how import a good PSU is. I am working with someone is heavily overclocking an i7 and two 970 in SLI as well as 4 SSD and a few hard drives, a bunch of fans, with a 750W PSU.
  • jkhoward
    Also... I am digging the age of some of these images.
  • blackmagnum
    This article brings back embarrassing memories. https://giphy.com/gifs/the-office-thank-you-michael-scott-1Z02vuppxP1Pa
  • alidan
    Quote:
    Quote:
    "the power supply is actually one of the more important parts of a build" Thank you!! Or rather, let's do what the cool kids are doing and rather post a GIF: https://giphy.com/gifs/the-office-thank-you-michael-scott-1Z02vuppxP1Pa
    Seriously, not enough people realize how import a good PSU is. I am working with someone is heavily overclocking an i7 and two 970 in SLI as well as 4 SSD and a few hard drives, a bunch of fans, with a 750W PSU.


    unless i'm thinking wrong, isn't that within the power limits of a 750? im even assuming that each gpu is 300 watts and i know they shouldn't hit that even with the most aggressive of ocs

    granted there is a distinction between a good psu and a bad one, but im just assuming its a good one.
  • chimera201
    Motherboard slots haven't evolved much. Wished every slot was like a USB slot
  • turkey3_scratch
    612443 said:
    Seriously, not enough people realize how import a good PSU is. I am working with someone is heavily overclocking an i7 and two 970 in SLI as well as 4 SSD and a few hard drives, a bunch of fans, with a 750W PSU.


    Your point being... ?
  • renosablast
    Steps 1 and 3 should be combined, and step 2 comes after 1 and 3. You better worry about the CPU and motherboard combo compatibility before you worry about a graphics card.
  • renosablast
    Sorry, meant steps 2 and 4 before 3.
  • Dark Lord of Tech
    I love when you see a $1500.00 build with top quality components and then they have a $40.00 PSU listed with it.
  • Outlander_04
    IMO the very first component selection for a gaming build should always be the .... MONITOR.
    Decisions on where and how to spend the rest of the budget can only be made once you know the resolution , and whether its 60 Hz, 144 Hz or whatever else is available
  • MasterMace
    Gonna throw in my disagreement on the priority, mentioned nice and early in the article. The first thing you pick is never your case. There's 3 things you can decide to be your starting point when building a pc to make it a smooth ride; either, 1. Budget. 2. CPU 3. Graphics. By picking 1 of these 3 things as your starting point, you can have a very smooth build process. Does that mean you buy your case last? No, I've seen plenty of builds where the case arrives first as a way of storing the items, but when you want a solid build, your case is last priority, as it has no impact on your performance and restricts the size of your items.

    Even if you wanted to build an odd form factor, like an itx, you would still pick the cpu or the budget before the case.
  • Thank you for explaining ESD correctly. I have been annoyed with articles over exaggerating about ESD a lot. So just touching something metal can help? Well, next time I think I'll set a PC on my wooden desk instead of the carpet.
  • kunstderfugue
    Quote:
    I love when you see a $1500.00 build with top quality components and then they have a $40.00 PSU listed with it.


    The XFX TS Bronze 550 comes down to $43 ish from time to time and that's a mighty fine PSU to power a single graphics card build.
  • nitrium
    Quote:
    "the power supply is actually one of the more important parts of a build" Thank you!!

    While not unimportant, it gets far too much attention on the forum's here. PSU's are only relatively rarely the cause of issues, and I'll go out on a limb and say that virtually ANY modern 650W PSU (even ultra-cheap China garbage) will reliably power a single GPU and CPU, regardless of model or how much OCing you do to them.
  • Crashman
    269694 said:
    Quote:
    I am working with someone is heavily overclocking an i7 and two 970 in SLI as well as 4 SSD and a few hard drives, a bunch of fans, with a 750W PSU.
    unless i'm thinking wrong, isn't that within the power limits of a 750? im even assuming that each gpu is 300 watts and i know they shouldn't hit that even with the most aggressive of ocs granted there is a distinction between a good psu and a bad one, but im just assuming its a good one.
    You're exactly right. We've been using high-quality power supplies in most of our System Builder Marathon machines, and dual 970s was in one of the builds. The super-high recommendations you see from other sites are a response to most builders using mediocre-quality units.
  • Crashman
    416912 said:
    Gonna throw in my disagreement on the priority, mentioned nice and early in the article. The first thing you pick is never your case. There's 3 things you can decide to be your starting point when building a pc to make it a smooth ride; either, 1. Budget. 2. CPU 3. Graphics. By picking 1 of these 3 things as your starting point, you can have a very smooth build process. Does that mean you buy your case last? No, I've seen plenty of builds where the case arrives first as a way of storing the items, but when you want a solid build, your case is last priority, as it has no impact on your performance and restricts the size of your items. Even if you wanted to build an odd form factor, like an itx, you would still pick the cpu or the budget before the case.
    Exactly wrong. The first thing people do is say "I want a LAN box" or "I want a media player" or "I want a big gorgeous office PC". They're picking a case SIZE when they make those FIRST statements, so size comes first in the discussion.
  • beoza
    Quote:
    416912 said:
    Gonna throw in my disagreement on the priority, mentioned nice and early in the article. The first thing you pick is never your case. There's 3 things you can decide to be your starting point when building a pc to make it a smooth ride; either, 1. Budget. 2. CPU 3. Graphics. By picking 1 of these 3 things as your starting point, you can have a very smooth build process. Does that mean you buy your case last? No, I've seen plenty of builds where the case arrives first as a way of storing the items, but when you want a solid build, your case is last priority, as it has no impact on your performance and restricts the size of your items. Even if you wanted to build an odd form factor, like an itx, you would still pick the cpu or the budget before the case.
    Exactly wrong. The first thing people do is say "I want a LAN box" or "I want a media player" or "I want a big gorgeous office PC". They're picking a case SIZE when they make those FIRST statements, so size comes first in the discussion.


    I have to agree with you on this Crashman. Whenever I go to build a new system for friends or relatives I always ask what they're going for in terms of use. I like to go with the Form follows function principle which is that the shape of a building or object should be primarily based upon its intended function or purpose.
  • Libero
    Quote:
    Gonna throw in my disagreement on the priority, mentioned nice and early in the article. The first thing you pick is never your case. There's 3 things you can decide to be your starting point when building a pc to make it a smooth ride; either, 1. Budget. 2. CPU 3. Graphics. By picking 1 of these 3 things as your starting point, you can have a very smooth build process. Does that mean you buy your case last? No, I've seen plenty of builds where the case arrives first as a way of storing the items, but when you want a solid build, your case is last priority, as it has no impact on your performance and restricts the size of your items. Even if you wanted to build an odd form factor, like an itx, you would still pick the cpu or the budget before the case.

    Quote:
    Sorry, meant steps 2 and 4 before 3.

    It is same meaning as define a purpose and choose a case. When you buy a computer you must know what the purpose for first example for home/office, web browsing, gaming or multi-tasking. Budget also is depend to each person. So it is not CPU or GPU before case.
  • James Mason
    I wish the pictures of PSU weren't just all Corsairs. That leads people to believe that all Corsair PSUs are "good" PSUs, when we know a vast majority aren't, and the ones a new builder are most likely to be definitely aren't.
  • Crashman
    297651 said:
    I have to agree with you on this Crashman. Whenever I go to build a new system for friends or relatives I always ask what they're going for in terms of use. I like to go with the Form follows function principle which is that the shape of a building or object should be primarily based upon its intended function or purpose.

    It is same meaning as define a purpose and choose a case. When you buy a computer you must know what the purpose for first example for home/office, web browsing, gaming or multi-tasking. Budget also is depend to each person. So it is not CPU or GPU before case.
    Yeh, I should have just kept his last statement and deleted the rest before responding:
    416912 said:
    Even if you wanted to build an odd form factor, like an itx, you would still pick the cpu or the budget before the case.
    What he's saying is even if you choose a form factor first, you're still buying the other parts first. Which is a backwards way of saying that the order of the article, form factor first, makes sense...and he still wants to disagree...

    The problem is that one needs keep a general concept of the case in mind when picking the actual components. One can often pick the exact case to fit that concept at the end, but the "Define a purpose" leads immediately to form factor, and chopping the article off there only to come back to case selection doesn't really make sense.
  • Bjorn_2
    I miss one important piece of advice: do not install anyhting but your primary drive before installing Windows. I have recently gone through the nightmare of trying to aggregate Windows onto my primary drive when replacing my SSD for a bigger one. It seems that if you have multiple drives installed, windows will happily use all for various purposes. So feel free to install everything but please, before installing Windows, disconnect your secondary and other drives.