Ram In Slot 1 And 3 Or 2 And 4?
RAM Slot Order – RAM slots on a motherboard come in sets, and it is important to make sure you install RAM in sequence corresponding to these sockets. The RAM fits into long channels on the motherboard in sets of two, three or four. If you have a quad channel motherboard, that is a motherboard capable of supporting four memory cards, make sure you install the RAM in corresponding pairs.
The RAM slots will be color coded to indicate which RAM pairs go together. These pairs are usually 1 & 3 or 2 & 4. Make sure the RAM you install is the same (same type, same capacity, same chip) across the pairs, or in the case of a triple channel motherboard, across all three slots. Modern motherboards all come with a feature called “Interleaving” which will bring down the performance of all RAM to the slowest RAM on the board.
This is particularly important if you have one of the motherboards mentioned earlier where it has slots for DDR3 and DDR4 memory. If you use all four slots, your computer will run as if all the slots have DDR3 memory installed and will not make use of the performance of the DDR4 sticks.
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Contents
Does RAM have to be in 2 and 4 slot?
It can, but it depends on the motherboard. Some motherboards require you to use specific slots depending upon how many ram cards you have. In general, however, 1 card by itself can go anywhere. For a dual channel board, each pair of cards must go in specific pairs of slots.
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Can I put my RAM in slot 3 and 4?
You can, but slots 3 and 4 on most motherboards are the same memory channel.
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Can you put RAM in Slot 1 and 4?
Yes, but sometimes certain slots will have better speed. If you have 2 ram sticks put them in the 2nd and 4th slots.
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Does it matter which slots I put RAM in?
Does the RAM slot order matter? It can, but it depends on the motherboard. Some motherboards require you to use specific slots depending upon how many ram cards you have. In general, however, 1 card by itself can go anywhere.
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Which RAM slots to fill first?
Installing Computer Memory Installing memory modules is straightforward. Most recent motherboards automatically detect installed memory modules regardless of the slot they occupy, but it is good practice to install modules in the lowest numbered slots first.
For example, if a single-channel memory motherboard has four memory slots, they will be numbered 0 to 3 (or 1 to 4). Fill slot 0 (or 1) first, then the other slots sequentially as you add modules. If you are installing memory in a dual-channel memory motherboard, install memory modules in pairs, filling the lowest numbered slots first.
For example, if the motherboard has two slots each for channel A and channel B, numbered 0 and 1, fill the slots for channel A slot 0 and channel B slot 0 first. Some motherboards require higher-capacity modules to be installed in lower-numbered slots.
For example, if you are installing two 256 MB DIMMs in a dual-channel motherboard that has four DIMM sockets, with 128 MB DIMMs already installed in the 0 slots for channel A and channel B, you may have to move those 128 MB DIMMs to the 1 slots for channel A and channel B and install the new 256 MB DIMMs in the 0 slots for both channels.
That rule is not invariable, though. A few motherboards require smaller modules to be installed in the lower banks. Some motherboards don’t care which module you install in which bank. Best practice is to check the manual before installing memory. If no documentation is available, experiment by moving modules around.
If some or all of the memory is not recognized during the boot-time memory check or in CMOS Setup, power down the system, rearrange the modules, and restart the system. If all memory is recognized, you can safely assume that you have the modules installed correctly. To install a DIMM, locate a free memory slot and pivot the ejector arms on each side of the socket as far as possible toward the horizontal.
The contact edge of the DIMM module is keyed with notches that correspond to protuberances in the DIMM socket. Align the notches and slide the DIMM straight down into the socket. Position your thumbs on top of the DIMM at each end and press down firmly, as shown in Figure 6-5,
- Figure 6-5: Align the memory module and press straight down until it seats DON’T CRACK UP Some motherboards particularly cheap ones are thin and very flexible.
- The pressure required to seat a DIMM may flex the motherboard enough to crack it.
- When you install a DIMM in a motherboard that’s already in the case, pay close attention to how much pressure you’re applying.
If the motherboard appears to be flexing too much, remove the motherboard from the case before installing the DIMM. Yes, that takes a lot more time, but it’s better than destroying the motherboard. The DIMM slides (sometimes snaps) into the socket, which automatically pivots the ejector arms toward the vertical.
If the ejector arms are not fully vertical, press them toward the DIMM until they lock into the vertical position, as shown in Figure 6-6, Note that some DIMM sockets have minor physical variations. If the DIMM does not fit easily into the socket, do not force it. Contact the vendor who supplied the DIMM for a replacement.
Figure 6-6: When the memory module is fully seated, the ejector arms pivot back to the vertical To remove a DIMM, pivot both ejector arms simultaneously toward the horizontal position. The DIMM simply pops out. DON’T FORGET THE CRIMM If you are installing Rambus RIMMs, also install a Continuity RIMM (CRIMM) in each unused memory slot.
Rambus systems malfunction unless all memory slots are occupied, either by a RIMM or a CRIMM. Most Rambus motherboards have enough CRIMMs bundled with the motherboard to populate all but one memory slot. If you run short of CRIMMs, you can buy them online. After you install the new memory modules and verify that all is as it should be, apply power to the system.
The memory self-test should increment up to the newly installed amount of memory. (If your system displays a logo splash screen rather than the BIOS boot screen, turn off the splash screen in BIOS Setup so that you can see the BIOS boot screen.) If it instead shows only the original amount of memory, the cause is almost always that you have not seated the new memory module completely.
Check the Chipset Setup portion of CMOS Setup to determine how memory is configured for the newly installed bank(s). Most recent chipsets and BIOSs automatically determine the correct size and configuration parameters for installed modules. But some chipsets, BIOSs, and memory modules do not implement SPD correctly. If this occurs, you may have to set the correct size manually, if indeed the module size you have installed is an available option.A limitation on maximum module size may be enforced by the chipset, the BIOS, or both. Before deciding you cannot use the larger module, check the motherboard manufacturer’s web site for a BIOS update. If the restriction on module size is enforced by the BIOS but not by the chipset, you may find that a later BIOS revision adds support for the larger module.If all else fails, the only alternative may be to return the memory module (you did make sure you had the right to return an incompatible module, didn’t you?) and obtain a compatible module.
: Installing Computer Memory
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Can you put RAM in all 4 slots?
If you have four RAM sticks and a four-slot motherboard, then you can just populate all four slots with all four RAM sticks, If you have more than four slots on your motherboard, then you either have a server motherboard or a very fancy high-end desktop / workstation motherboard.
Does all 4 RAM slots need to be the same? Most laptops or computers come with at least two slots for RAM sticks, if not more. Most modern motherboards will provide four RAM slots. There’s a prevailing misconception you cannot use different RAM sizes together or that you cannot mix RAM brands. Simply put, that’s not true,
Do you have to use all RAM slots? No you don’t need 4 ram sticks,2 and 2 is perfectly fine. I have no idea what motherboard you have tho, so i just assume it is Dual-Channel. If you decide to use 2 sticks you’ll have to put em in either slot 1 and 3 or 2 and 4.
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Can I put DDR 4 RAM on a DDR 3 slot?
How does DDR4 differ from DDR3 in appearance? – Physically, a, or dual in-line memory module (DIMM), looks very similar to a DDR3 DIMM. However, DDR4 has 288 pins compared with DDR3’s 240 pins; DDR4 SO-DIMMS have 260 pins instead of 204 in DDR3. The DDR4 key notch is in a different place, and the edge connector looks like a slightly curved “V” to facilitate insertion.
- How does DDR4 differ from other DDR generations?
- The following table compares the different DDR generations.
- DDR Evolution
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- Table 1. Comparison of different DDR generations
- What are the advantages of DDR4 over DDR3?
- Lower power
DDR4 modules are more energy-efficient, operating only at 1.2V compared with DDR3’s 1.5V or 1.35V. The reduced power consumption gives substantial power savings and allows operation at higher speeds without higher power and cooling requirements.
- Higher module density
- DIMM densities start at 2 GB, reaching up to 128 GB – a big leap from DDR3’s 512 MB to 32 GB capacities.
- Faster data transfer speed
ATP’s latest DDR4 modules for embedded and industrial applications deliver high-speed data transfers up to 3200 MT/s. DDR4-3200, the latest industrial DDR4 offering from ATP, transfers data about 70% faster than DDR3-1866, one of the fastest DDR3 versions available, for a big boost in theoretical peak performance.
| Item | DDR3-1866 | DDR4-3200 |
|---|---|---|
| I/O bus clock | 933 MHz | 1600 MHz |
| Data rate | 1866 MT/s | 3200 MT/s |
| Peak transfer rate | 14928 MB/s | 25600 MB/s |
Table 2. DDR3-1866 vs. DDR4-3200 
Figure 2. Performance comparison: DDR3-1866 vs. DDR4-3200. Do the latest Intel® Xeon® Scalable processors support DDR4 modules from ATP? Yes. Each of the latest Intel® Xeon® Scalable processors with Intel® C620 Series Chipsets (formerly code-named Skylake-SP and Lewisburg) provides native support for six memory channels that can operate at the same speed even at full load.
- Which applications and industries will benefit most from DDR4-3200/2933/2666/2400?
- The increased interface speed amplifies theoretical peak performance for the most critical computing applications in industries such as telecommunication infrastructures, networking storage systems, network-attached storage (NAS) servers, micro/cloud servers, and embedded systems like industrial PCs.
- What are available from ATP Electronics?
| Form Factor | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Category | LRDIMM | RDIMM | UDIMM | UDIMM ECC | SO-RDIMM | SO-DIMM | SO-DIMM ECC | Mini-RDIMM | Mini-UDIMM | Mini-UDIMM ECC |
| Data Rate Speed (MT/s) |
|
2400 2133 |
|
2400 2133 | ||||||
| PCB Height | Low profile | VLP: 0.74″ height | ||||||||
| VLP option: 0.74″ height | ULP option: below 0.74″ height | VLP option: 0.74″ height | VLP option: 0.74″ height | |||||||
| Density |
|
|
|
|
|
|
||||
| Voltage | 1.2V | |||||||||
| Working Temperature | Wide Temp: -40-95°C Commercial Grade: 0-85°C | |||||||||
| Golden Finger | 30µ |
Table 3. ATP DDR4 product family How will I know if my system supports DDR4? Can I install a DDR4 DIMM on a DDR3 slot? Every DDR generation is different from the others. DDR4 is not backward-compatible with DDR3 so a DDR4 DIMM will not fit on a DDR3 DIMM slot.
- Not only is the key notch of each DDR generation different (please refer to Figure 1 above), but the DDR4 pin size and arrangement is different from DDR3.
- Notice that towards the middle of the DDR4 module, some pins are longer, giving it a slightly curved “V” shape.
- Refer to your motherboard documentation to make sure that it has the correct DDR4 slot.
Figure 3. A standard DDR4 ECC DIMM module from ATP. Pins in the middle are longer, giving the module a slightly curved “V” shape. How can I choose which DIMM type to use on my system? Different DIMM types serve several purposes. DIMMs may or may not have error correcting code (ECC/non-ECC).
They could be unbuffered or fully buffered (UDIMM/FB-DIMM), registered (RDIMM), or load-reduced (LR-DIMM). Different systems platforms can accommodate different memory types, so make sure to check which DIMMs are supported on your motherboard. For a quick look at common memory types, read “” on the ATP Blog.
Is it possible to combine DIMMs with different data rates on the same system? To get the best memory performance, it is recommended that you install identical DIMMs on the same system. When mixing DIMMs of different operating speeds, the motherboard will underclock the faster one so it will only run at the speed of the slowest DIMM, unless you overclock the slow DIMMs.
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What happens if you put your RAM in the wrong slots?
RAM is keyed so it will only go in the correct way in compatible slots. It isn’t possible to connect it the wrong way. If you don’t use the optimal set of slots for multichannel memory, it will still work in single channel. No harm will be done.
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Can I put my RAM in Slot 1 and 2?
In a motherboard with two RAM slots, you can simply put your first stick of RAM into Slot 1 and a second stick into Slot 2, If you just have one stick, you don’t have to fill Slot 2. In the case of a motherboard with four RAM slots, it’s probable you’ll want to install your first RAM stick into the slot labeled 1.
- How do I activate both RAM slots? Install the DIMM memory upgrades into empty DIMM memory slots.
- Boot the machine and press F1 to get into BIOS, then select Advanced Settings, then Memory Settings, and change the corresponding DIMM slots option to “Row is enabled”,
- Save the BIOS settings and reboot.
- How do I know if my RAM slot is broken? The only way to check your motherboard’s memory slots is to place a working RAM stick into each one and see if your machine boots properly,
Remove all RAM sticks and place one you know is functional into the first slot on your motherboard.
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Can I put RAM in Slot 1 and 3?
It can, but it depends on the motherboard. Some motherboards require you to use specific slots depending upon how many ram cards you have. In general, however, 1 card by itself can go anywhere. For a dual channel board, each pair of cards must go in specific pairs of slots.
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Can I put RAM in Slot 1 and 2?
In a motherboard with two RAM slots, you can simply put your first stick of RAM into Slot 1 and a second stick into Slot 2, If you just have one stick, you don’t have to fill Slot 2. In the case of a motherboard with four RAM slots, it’s probable you’ll want to install your first RAM stick into the slot labeled 1.
How do I activate both RAM slots? Install the DIMM memory upgrades into empty DIMM memory slots. Boot the machine and press F1 to get into BIOS, then select Advanced Settings, then Memory Settings, and change the corresponding DIMM slots option to “Row is enabled”, Save the BIOS settings and reboot. How do I know if my RAM slot is broken? The only way to check your motherboard’s memory slots is to place a working RAM stick into each one and see if your machine boots properly,
Remove all RAM sticks and place one you know is functional into the first slot on your motherboard.
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Do all 4 sticks of RAM have to be the same speed?
Busting RAM Myths One at a Time – These six myths are the most common ones you’ll read regarding RAM. You can do a lot with RAM: mismatched sticks, different speeds, different sizes, and so on. For the most part, you’ll just end up with a slower computer.
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Where to put RAM in 4 slots?
How to install RAM in your PC – With the buying considerations out of the way and 16GB of DDR4 memory freshly delivered to your door step, it’s time to install your new RAM. It’s a quick and rather painless task—assuming you’ve done all your homework. 
These are the motherboard slots you insert your RAM into. Before you can install the new memory you’ve purchased, you have to remove the old kit. Start by toggling the plastic retention clips at either end of the memory slots so you can pull out the old RAM. 
Release the toggles at the end of the RAM channel in order to remove your old memory. While you’re there, remove any dust from the memory slots, either by blasting the area with compressed air or by vacuuming gently. Now it’s time to put in the new RAM kit. 
Make sure the notch in the bottom edge of your RAM modules match up with the rises in the memory channel on your motherboard. Now that you’ve seated the RAM in the slot, toggle the plastic retention levers to lock your new memory modules in place. 
Snap the channel’s toggle closed again to lock in your RAM. Finally, close up your computer case, plug everything back in, and turn on your computer. It may take a couple of restarts for your motherboard to recognize and adjust to the new memory you’ve installed—so don’t panic if your computer is acting funny at first.
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