RAM slot 3 and 4 working other is broken (Solved)

[ˢᵈˣ FatCat]

So i helped my friend build PC by choosing the parts, long story short he somehow made the cpu lil bit bended, thus make that problem.

clearly we cant RMA it because user mistake, so we kinda accept our 600dollar cpu is swimming with the fish
so the question is, what the real impact using not dual channel, because at slot 3 and 4 the speed still 6400M/t
and can a broken CPU make other part broken, like the motherboard?spread out something like that
and his PC working fine , no complain.

[_I_]

check the socket for bent pins

or if the cpus pcb is warped, it can break traces inside it and cause that memory channel not to work (or other things, pci lanes, power delivery parts, igpu or something else)

its effectively half of its potential ram speed, as its only using one ram channel at a time, instead of both at once

most things wont care, but ram intensive tasks will see a larger difference

[Illusion of Progress]

List the (exact) hardware.

Knowing the platform helps because if this is AM5, then 6,400 MHz might not always work.

Knowing the exact RAM helps too. For example, dual rank is harder to stabilize and also might not always work at some settings..

What exact motherboard motherboard is this? Knowing this tells us which RAM slots are 3 and 4. Sometimes people refer to them in ascending order starting with the closest to the CPU, but sometimes the motherboard alternates the numbers. So it would be helpful to know what motherboard slots you're referring to.

Anyway...

Dual channel can be pretty important as it allows for simultaneously managing two DIMMs at once in the same channel, and this increases maximum throughput. In practice, the gain is less than the theoretical maximum because there's usually other factors that get involved. But it can be a pretty big performance difference.

If the CPU is bent, it's possible there's insufficient contact between a pin and pad that is used for memory communication. It's possible there's some other issue and the bending of the CPU isn't related (but you would need another CPU for that socket to test this).

I wouldn't want to run a PC for gaming without it. But if "the current level of performance I'm getting is satisfactory for me" then... everything else is arbitrary.

[ˢᵈˣ FatCat]

Originally posted by _I_:

check the socket for bent pins

or if the cpus pcb is warped, it can break traces inside it and cause that memory channel not to work (or other things, pci lanes, power delivery parts, igpu or something else)

its effectively half of its potential ram speed, as its only using one ram channel at a time, instead of both at once

most things wont care, but ram intensive tasks will see a larger difference

yeah the pin was broken, but MSI put a new socket, then the problem still there so after checking again, the CPU is bended too.

we kinda want make a peace with this problem and be done with it with using slot 3 and 4 , but we still have not sure is this gonna be a problem, we asked the technician on MSI, what is the worse scenario using 3 and 4, and they said it just wont optimized, but they cant explained preciesly what is or how unoptimize gonna be

[ˢᵈˣ FatCat]

Originally posted by Illusion of Progress:

List the (exact) hardware.

Knowing the platform helps because if this is AM5, then 6,400 MHz might not always work.

Knowing the exact RAM helps too. For example, dual rank is harder to stabilize and also might not always work at some settings..

What exact motherboard motherboard is this? Knowing this tells us which RAM slots are 3 and 4. Sometimes people refer to them in ascending order starting with the closest to the CPU, but sometimes the motherboard alternates the numbers. So it would be helpful to know what motherboard slots you're referring to.
.

it's clearly hardware problem, they tried it using other CPU and working fine
his PC are high-end , his ram is kinda sus XPG Adata lancerblade , MSI Z790, CPU i kinda forgot but it's expensive, his GPU 3080ti

[_I_]

if you rma'd the board and they replaced the socket, that should be fine
just the damaged cpu due to it being bent/warped

check everything else to verify its works, pci lanes, cpu controlled usb ports, it would be hard to test power/ground as many pins are redundant for those

anything in windows device manager showing as unknown or broken
*after installing mobo chipset drivers

[Alice Liddell]

How in the world do you bend a CPU?

I have seen people bend GPU PCB's by de-shielding them to attach water blocks but a CPU?

Was this an error where someone attached the cooler and cranked those screws like a 900lb gorilla or something (similar to auto techs using impact drivers on oil filters which is not recommended and can crack the filter enclosure as you are supposed to spin these by hand then crank them about 1/3rd of a turn after hand-tightening with a ratchet).

OP, have your friend stick one RAM stick into slot 2 (A2) and the other in slot 4 (B2) and tell us how that goes because A1 and A2 will fault, A1 and B1 will fault, and B1 and B2 might fault.

[ˢᵈˣ FatCat]

Originally posted by _I_:

if you rma'd the board and they replaced the socket, that should be fine
just the damaged cpu due to it being bent/warped

check everything else to verify its works, pci lanes, cpu controlled usb ports, it would be hard to test power/ground as many pins are redundant for those

no cant do RMA, MSI rejected it, we even paid them to repair the socket
ok we will try those stuff
how do try pcie lanes? he play everything on ultra, tho sometimes stutter because using it on 4k, not stutter, seems like 1% low stuff, tried again 1080p smooth no hiccup

[ˢᵈˣ FatCat]

Originally posted by Alice Liddell:

How in the world do you bend a CPU?

I have seen people bend GPU PCB's by de-shielding them to attach water blocks but a CPU?

that i have no idea, the techician explained the possible caused that he put his CPU not correctly at the socket, so when he put AIO , the heatsink kinda pressured it but not equal , i dont know terms on english

[Alice Liddell]

Originally posted by ˢᵈˣ FatCat:

Originally posted by Alice Liddell:

How in the world do you bend a CPU?

I have seen people bend GPU PCB's by de-shielding them to attach water blocks but a CPU?

that i have no idea, the techician explained the possible caused that he put his CPU not correctly at the socket, so when he put AIO , the heatsink kinda pressured it but not equal , i dont know terms on english

Oh, so they cranked one screw down all the way, that might warp the CPU because you are supposed to turn those screws about 2-3 turns each on par in a rotation (i.e. top left then bottom right, top right then bottom left just like a car wheel lug nuts so it sits flush) those screws are tightened in the "X" formation, or pattern.

A car's lug nuts are tightened in a star pattern, or formation but an engine manifold is per the manufacturer and pictured under the hood on a diagram but usually ends first then mid screws again all fastened at the same per turn so no oil leaks out, hence no gaps but I have seen manifold patterns with varying differences and dependent on if it is a V4, V6, or V8 engine.

And if memory serves me well, the CPU heatsink and AOI faceplates are spring loaded so you are talking more pressure under tension which is even worse than basic screw torque (which reminds me of that engine piston job I did fairly recently which was a beast).

If you are to use an electronics torque wrench, either cordless power or manual hand twist, you start with 1 key torque and work up as it will spin evenly especially with hand twist electronics torque wrenches which I can recommend as they will evenly spin to torque without overtightening at low key but I would not use a power torque at high torque key.

[_I_]

if they used the wrong mounting hardware it can allow to overtighten the screws holding the cpu cooler to the cpu/socket and warp the pcb and/or mobo.

but mobo is much thicker and has support bracket so it wont warp as much and break internal traces

you can see in gpuz that the gpu is using all of its lanes at the correct pci-e rev

if everything shows correctly in device manager, and cores report the correct temps (all cores +/- 10c) from each other max at lod or idle

also let it run ibt or pirme95 small fft tests til temps level off, if they show no errors or bsod/reboots then its fine

[ˢᵈˣ FatCat]

so yeah, using 6400MT on slot 3 and 4 make gaming have weirdly stutter, like froze then moving later, intermitient stutter. and he needs to make the speed to 4800M/t, to make it stable

well it is what it is

[PopinFRESH]

Did you take any pictures of the bent CPU and bent pins in the CPU socket? I think a picture of what you're trying to explain would help people have a better idea of what issue you guys encountered.

If he installed the CPU backwards (e.g. didn't line up the corner triangle on the CPU with the triangle on the socket retention bracket) and then closed the socket it will crush the CPU package (PCB) and bend up the corners.

Is that what you are talking about? If so, the answer to your question "can a broken CPU make other part broken, like the motherboard?" would be yes potentially as this could/may eventually short and cause damage to other components such as the motherboard and/or memory.

[ˢᵈˣ FatCat]

Originally posted by PopinFRESH:

If he installed the CPU backwards (e.g. didn't line up the corner triangle on the CPU with the triangle on the socket retention bracket) and then closed the socket it will crush the CPU package (PCB) and bend up the corners.

.

yes bended the corner, like a wing from some plane, but very very slightly but it is bended, so needs two takes to actually see the bended corner

Originally posted by PopinFRESH:

If so, the answer to your question "can a broken CPU make other part broken, like the motherboard?" would be yes potentially as this could/may eventually short and cause damage to other components such as the motherboard and/or memory.

yes that what i have been wondering, or assumed because one of his RAM suddenly died, from my experienced, RAM is rarely broken, usually dead on arrival

so better we buy new CPU right, i will tell him right now
we kinda still want to appeal to INTEL directly, i heard from one of MSI guy that that if we can appeal right, you can still get RMA directly from them,

[PopinFRESH]

Originally posted by ˢᵈˣ FatCat:

Originally posted by PopinFRESH:

If he installed the CPU backwards (e.g. didn't line up the corner triangle on the CPU with the triangle on the socket retention bracket) and then closed the socket it will crush the CPU package (PCB) and bend up the corners.

.

yes bended the corner, like a wing from some plane, but very very slightly but it is bended, so needs two takes to actually see the bended corner

Originally posted by PopinFRESH:

If so, the answer to your question "can a broken CPU make other part broken, like the motherboard?" would be yes potentially as this could/may eventually short and cause damage to other components such as the motherboard and/or memory.

yes that what i have been wondering, or assumed because one of his RAM suddenly died, from my experienced, RAM is rarely broken, usually dead on arrival

so better we buy new CPU right, i will tell him right now
we kinda still want to appeal to INTEL directly, i heard from one of MSI guy that that if we can appeal right, you can still get RMA directly from them,

If I was personally in your (or your friend's) shoes, yes I'd replace the CPU. You could certainly try to RMA it but I wouldn't believe anything some rando MSI support guy told you in regards to what Intel will do. I can almost guarantee that the RMA will be denied; however they may potentially still provide you with a non-warranty replacement which might be cheaper than buying a new replacement CPU at retail. I would however caution you to not try to "hide" the physical damage when trying to ask for an RMA; because they will do an inspection and test when they receive the RMA'd product and if you've misrepresented the condition they will ship it back and charge you for the shipping and possibly a labor fee for the inspection.

[_I_]

Originally posted by ˢᵈˣ FatCat:

yes bended the corner, like a wing from some plane, but very very slightly but it is bended, so needs two takes to actually see the bended corner

wow, hopefully it was not powered on like that
could damage more than just the memory controller

whoever installed it wrong owes you a new cpu

reminds me of way back, someone snipped off pins of a 486 to put it in a 386 socket
they were not pin compatible, but there were 'upgrade' adapters for 386 boards to use a cyrix 486 cpu