ACER Predator Orion 7000 PO7-650 - What's the max memory clock rate / transfer rate?

Re4LyZed

Regarding the model ACER Predator Orion 7000 PO7-650 (nr. DG.E39EZ.008)

The desktop pc comes with 32 GB built in RAM (2x 16 GB) with DDR5 4000 "MHz". However, most retailers dont get the difference between clock rate and transfer rate. I am planning to upgrade the memory with faster RAM modules and therefore i am wondering what the maximal supported clock rate / transfer rate of the model is.

Does anybody have information about that or where can i find the detailed datasheets of this model for such information?

As of my understanding the CPU (i9-13900KF) will certainly be no hold back, but the mainboard may be the bottleneck as i have no information about it.

As wikipedia displays in its DDR5 SDRAM article, 4000 MHz clock rate vs 4000 MT/s transfer rate is a huge difference.

DDR5: Clock rate 2,000–4,000 MHz & Transfer rate 4,000-8,000 MT/s

Thank you very much!

brummyfan2

https://community.acer.com/en/discussion/comment/1202068#Comment_1202068

The snip is from the Service guide, I agree with @StevenGen, if you install 2x16GB 4800MHz modules in 1&2 the system will run at 4400MHz, if you use all 4 slots(64GB) the system will run at 4000MHz, have a look at other users' results.

https://www.userbenchmark.com/UserRun/60279950

https://www.userbenchmark.com/UserRun/60793031

https://www.userbenchmark.com/UserRun/61394660

StevenGen

https://community.acer.com/en/discussion/685261/acer-predator-orion-7000-po7-650-whats-the-max-memory-clock-rate-transfer-rate

The PO7-650 eManual states catagorically that the memory frequency will only support 4000MHz, whether plugging in memory that is 4800MHz or higher, which means that this board will not support any higher ram than DDR5-4000Mhz. You can fit XMP type ram but you have to turn XMP on, as XMP has different memory profiles that you can take advantage of and get better speeds for different applications. Read this article as far as "DDR5 Memory, Transfer Rate in MT/s Explained" as its not the same as DDR4, as one element that differentiates DDR5 memory from other DDR memory to date and that is the fact that it supports two memory channels per DIMM.

MT / s do not measure the amount of data that is sent per shipment. So despite the fact that DDR5 has gone from sending 64 bits of data per transfer to 32 bits per DIMM, the number of transfers has increased. So if we compare a DDR4-3200 module with a hypothetical DDR5-3200 module, the first will have a speed of 6400 MT / s, while the second of 12800 MT / s.

brummyfan2

Hi,

Your model supports 4400MHz frequency for JEDEC profile modules and 6600MHz for XMP profile modules but don't mix JEDEC RAM with XMP RAM modules.

As for the MT/s vs MHz query, please read the article for explanation.

https://www.cgdirector.com/mts-vs-mhz/

Re4LyZed

Many thanks for your elaborations @StevenGen & @brummyfan2.

The User Manual writes on page 15 the following: "In the combination of installed memory, as long as DIMM3 or DIMM4 is used, the memory frequency will only support 4000MHz, wheater plugging in memory is 4800MHz or higher."

But what if i only use 2x 16GB memory on DIMM1 and DIMM2, will i be able to reach higher values without XMP?

@brummyfan2 where can i find the datasheet you send a screenshot from?

User Manual: https://www.acer.com/us-en/support?search=PO7-650&filter=global_download&suggest=PO7-650;1

StevenGen

https://community.acer.com/en/discussion/comment/1202068#Comment_1202068

See specs below

brummyfan2

https://community.acer.com/en/discussion/comment/1202068#Comment_1202068

The snip is from the Service guide, I agree with @StevenGen, if you install 2x16GB 4800MHz modules in 1&2 the system will run at 4400MHz, if you use all 4 slots(64GB) the system will run at 4000MHz, have a look at other users' results.

https://www.userbenchmark.com/UserRun/60279950

https://www.userbenchmark.com/UserRun/60793031

https://www.userbenchmark.com/UserRun/61394660

StevenGen

https://community.acer.com/en/discussion/comment/1202068#Comment_1202068

This is the SG memory specs and HDD for your PO7-650 as addtional info.

chugzilla

https://community.acer.com/en/discussion/comment/1202068#Comment_1202068

you would need a new MB to get the ram speed you are asking about, acer locks the bios so we cannot enable XMP on them, i have 4x16 ddr5@4800mhz and i only get 4000mhz, when i had 2x16 i got 4400mhz, all 4 of my sticks are matched crucial 16 gig sticks, and to get the desired speeds you want on a new MB would require XMP and or using the memory OC presets built in, i have called several places that sell MB's and picked their brains and some only get 4000 out of the box unless XMP or OC presets are enabled so you know.

billsey

It's not a factor of the motherboard specifically, the Intel Z790 Chipset runs the memory at 4400 MT/s when populated with two DIMMs and 4000 MT/s when populated with four. Any Z790 motherboards will have that same spec.

NeoGeo

https://community.acer.com/en/discussion/comment/1202636#Comment_1202636

Yes that's intels base spec for the z690 too, however with a decent MB with good overclocking features, even the acer base ram with no XMP profiles on it can be overclocked easily, with stability, as i'm running in a config of four sticks.

Also worth noting most if not all prebuilt manufacturer MBs don't allow ram overclocking even from ones who manufacture their own high end MBs and instead give a stripped down bios.