5600MHz to 6400MHz?

Zeebedy · Friday at 17:24

Hey guys,

Pc all up and running nicely, my only thing I’m looking at now is my RAM. It’s a 6400MHz kit 64gb, and it’s not on EXPO yet at 5600MHz.

A mate on this forum said to try it out with memtest, but I’m wanting to know first if the extra OC on the RAM will make much difference for gaming?

I’m on a 9800X3D and 5070 atm.

Cheers.

tamzzy · Friday at 17:26

Zeebedy said:
RAM will make much difference for gaming?

Not on a x3d chip

Tetras · Friday at 17:29

It won't matter, but if you spent the money to get a 6400 rated kit, I'd imagine you want to try and use it.

Zeebedy · Friday at 17:39

Tetras said:
It won't matter, but if you spent the money to get a 6400 rated kit, I'd imagine you want to try and use it.

yeah, just wasnt sure how stable it would be, i though initially it would have been like 4800MHz or something I didnt realise it was default at 5600Mhz.

Tetras · Friday at 19:08

Zeebedy said:
yeah, just wasnt sure how stable it would be, i though initially it would have been like 4800MHz or something I didnt realise it was default at 5600Mhz.

6400 is considered on the edge of what a 9000 CPU would like to run (at least, optimally at a 1:1 ratio), so it might not be stable at stock. There's only one way to find out though.

tamzzy · Friday at 20:22

Just enable expo, if 6400 don't work then run it at 6000.

Just make sure that the IF is running at 1:1

deviation · Friday at 20:43

If you want to know it definitely isn't going to cause you hassle and randomly crash 1 game but not others etc, and make you have no idea why in 6 months, then just do a memtest, I did one recently for around 22 hours with a bootable USB and just left it and checked it every X amount of hours.

For the sake of a day leaving it running and then turning it off the next morning, it's worth it. Then you know it's solid.

Use Rufus to make the bootable USB.

Rufus - Create bootable USB drives the easy way

Rufus: Create bootable USB drives the easy way

rufus.ie

And use the better opensource free memtest86+, don't waste your time with the trail of the paid one, it won't do looped runs, and screw paying for something like this when opensource exists.

Memtest86+ | The Open-Source Memory Testing Tool

Memtest86+ is an advanced, free, open-source, stand-alone memory tester for 32- and 64-bit computers (UEFI & BIOS supported)

memtest.org

JollyJamma · 2025-09-21T08:13:38+0100

…Or just use Testmem5 with the ANTA777 extreme preset in windows which is a better tool to make sure memory is stable.

Google for download links.

OP, manually set your RAM to 6000 MT/s or 6200 MT/s and see if that helps performance.

6400 MT/s is a little spicy for AMD but is possible but requires more stability testing.

deviation · 2025-09-21T12:32:48+0100

JollyJamma said:
…Or just use Testmem5 with the ANTA777 extreme preset in windows which is a better tool to make sure memory is stable.

Google for download links.

OP, manually set your RAM to 6000 MT/s or 6200 MT/s and see if that helps performance.

6400 MT/s is a little spicy for AMD but is possible but requires more stability testing.

It's definitely not a better tool, as your ram is being used to run Windows as well. So you can't test all of it, like you can with a bootable usb tester...

JollyJamma · 2025-09-22T09:16:31+0100

deviation said:
It's definitely not a better tool, as your ram is being used to run Windows as well. So you can't test all of it, like you can with a bootable usb tester...

Memtest86+ does load on a dedicated bootloader but isn't regarded as a very tough method of testing RAM by serious memory overclockers like Buildzoid.

The tools that Buildzoid uses include Testmem5 with the Anta 777 extreme preset, SuperPi, Y-Cruncher, LinPack Extreme and HCI MemTest and they are happy if the tools run in Windows and not in a dedicated bootable drive.

deviation · 2025-09-22T09:19:56+0100

JollyJamma said:
Memtest86+ does load on a dedicated bootloader but isn't regarded as a very tough method of testing RAM by serious memory overclockers like Buildzoid.

The tools that Buildzoid uses include Testmem5 with the Anta 777 extreme preset, SuperPi, Y-Cruncher, LinPack Extreme and HCI MemTest and they are happy if the tools run in Windows and not in a dedicated bootable drive.

Memtest86+ was just an example of a bootable dedicated tester being more thorough dude

Wasn't trolling you

I forget the other one I've used, it also is bootable, and does various other system stability functions - I'm pretty sure it's in those examples you've listed but I haven't bothered to google each one to remember lol no offense.
It's got a red and black interface IIRC and has a paid for version.

Either way if said tester is loading in Windows and being denied X amount of ram due to the OS stealing it, then that section never gets properly tested. So I still stand by what I said, as it was literally the difference between being told everything was fine, and that it wasn't - when I found the issue with a bootable