Performance decrease after upgrading ram imac 27 inch 2017 4.2ghz 512 Ssd

[xore]

Hello, sorry if this question is a bit silly but if u guys can help me i will be happy. Ok here is my question;

I bought my 2017 Imac 4.2 ghz 512 ssd with 8 gb ram and i thought i can upgrade as the most other users think. When i bought it i geekbench it with 8gb ram. My scores are :Single Core : 5574 Multi Score is: 18511, Gpu is 118167. Today i bought 8 gb more ram and installed , i geekbenched again and i got lower results like Single score is :5474 Multi Score is: 17274, Gpu score is 117505. I know the difference can be minor but after upgrading this decrease got me suprsise. I saw other geekbench with same specs more higher than my machine and esp when i got my ram higher decrease?. I would be happy if u guys share ur thoughts with me. I have 3 days for returning it back. Thank you for the help in advance.

 

[redheeler]

Is the RAM you bought running at the same speed as the Apple RAM (2400 MHz)?

 

[CE3]

Have you noticed a decrease in performance, or are you just looking at the numbers? Geekbench scores are rarely the same every time. I just ran a quick benchmark on my iPad after reading your post. The results were 4215 single & 9872 multi, whereas a June benchmark gave me 4157 single 9726 multi. Run the benchmark again. Make sure you don’t have any big programs or unnecessary processes running in the background. I don’t think it’s connected to your RAM, but like @redheeler said: double check to ensure the RAM you installed meets the same specifications.

 

[xore]

Is the RAM you bought running at the same speed as the Apple RAM (2400 MHz)?

Yes its the same 8gb 2400 mhz ddr4 kingston ram
[doublepost=1505851008][/doublepost]

Have you noticed a decrease in performance, or are you just looking at the numbers? Geekbench scores are rarely the same every time. I just ran a quick benchmark on my iPad after reading your post. The results were 4215 single & 9872 multi, whereas a June benchmark gave me 4157 single 9726 multi. Run the benchmark again. Make sure you don’t have any big programs or unnecessary processes running in the background. I don’t think it’s connected to your RAM, but like @redheeler said: double check to ensure the RAM you installed meets the same specifications.

If im honest i didn't experience any decrease at performance when using or any increaments. It feels the same to me. But when i see the numbers changed downside even if its minor. I had no program running at background or anything. I run that benchmark just after i opened the Imac. And yes Rams are just exact same specs with Apples rams. I was very careful when buying them

 

[CE3]

Yes its the same 8gb 2400 mhz ddr4 kingston ram
[doublepost=1505851008][/doublepost]
If im honest i didn't experience any decrease at performance when using or any increaments. It feels the same to me. But when i see the numbers changed downside even if its minor. I had no program running at background or anything. I run that benchmark just after i opened the Imac. And yes Rams are just exact same specs with Apples rams. I was very careful when buying them

I think you're ok. I have the same configuration as you (except more installed RAM). I just ran Geekbench on my Mac and my scores are in the same ballpark:

I ran two for each.

CPU:
https://browser.geekbench.com/v4/cpu/4082429
https://browser.geekbench.com/v4/cpu/4082557

GPU:
https://browser.geekbench.com/v4/compute/1133904
https://browser.geekbench.com/v4/compute/1133912

Quite a difference in the two GPU scores.

 

[nambuccaheadsau]

Do not worry about it xore. Geekbench advise installing additional memory has little or no affect on Geekbench scores unless the machine has far too little memory, such as 2GB. Have a read of this:-


http://support.primatelabs.com/disc...ry-upgrade-does-not-give-so-much-higher-score

 

[xore]

I think you're ok. I have the same configuration as you (except more installed RAM). I just ran Geekbench on my Mac and my scores are in the same ballpark:

I ran two for each.

CPU:
https://browser.geekbench.com/v4/cpu/4082429
https://browser.geekbench.com/v4/cpu/4082557

GPU:
https://browser.geekbench.com/v4/compute/1133904
https://browser.geekbench.com/v4/compute/1133912

Quite a different in the two GPU scores.

thank you very much, You helped me a lot with posting these scores. It is weird what and why effects this much and makes the difference but your scores altho u have more ram than me explains a lot. Thank you very much.
[doublepost=1505859180][/doublepost]

Do not worry about it xore. Geekbench advise installing additional memory has little or no affect on Geekbench scores unless the machine has far too little memory, such as 2GB. Have a read of this:-


http://support.primatelabs.com/disc...ry-upgrade-does-not-give-so-much-higher-score

Yes, i wasn't expecting a huge change in performance but still expecting some even if its a minor change. But seeing no difference one side seeing the decrease at scores made me a bit worried but thanks to you guys relieved me about it. I wasn't aware of the link you posted now i'm gonna read it. I appreciate the time and care to reply my issue. Thank you very much.

 

[SaSaSushi]

Yes its the same 8gb 2400 mhz ddr4 kingston ram

Is it Hyper-X? That is overclocked and known to not work well, if at all, in combination with Apple's stock RAM.

 

[xore]

Is it Hyper-X? That is overclocked and known to not work well, if at all, in combination with Apple's stock RAM.

No it is kingston 8gb 2400 mhz ddr4 ram

 

[SaSaSushi]

Did you leave the Apple RAM in its original slots and just add the Kingston to the empty ones? The matching modules should be in staggered slots with a slot between them.

 

[xore]

Did you leave the Apple RAM in its original slots and just add the Kingston to the empty ones? The matching modules should be in staggered slots with a slot between them.

I did just exactly the same way u said.

 

[SaSaSushi]

I did just exactly the same way u said.

The reason I asked is that I noticed a slowdown in testing when the RAM was not in the proper dual-channel configuration. I agree you likely don't need to worry about your results. Geekbench is a synthetic benchmark in which scores will vary to a certain degree each time you run it.

 

[xore]

The reason I asked is that I noticed a slowdown in testing different configurations when the RAM was not in the proper configuration. I agree you likely don't need to worry about your results. Geekbench is a synthetic benchmark in which scores will vary to a certain degree each time you run it.

Mhmm i understand, Thank you for the answer, i was very careful about the ram when i was buying but to be honest i did place the ram like u said without knowing it has to be done that way. Thanks again.

 

[CaptRB]

Geekbench was higher BEFORE I added 16GB of ram from Crucial. Hours later it reported HIGHER numbers. Today it's about the same.

Just ran it it again on my i7 which is the identical spec as yours and got:

Single: 5592 Multi: 19740, Gpu: 115938

I disconnected my 2nd monitor and then got a higher GPU score. I think you'll see variable numbers as the machine "breaks in" and settles. I wouldn't worry.


R.

 

[xore]

Geekbench was higher BEFORE I added 16GB of ram from Crucial. Hours later it reported HIGHER numbers. Today it's about the same.

Just ran it it again on my i7 which is the identical spec as yours and got:

Single: 5592 Multi: 19740, Gpu: 115938

I disconnected my 2nd monitor and then got a higher GPU score. I think you'll see variable numbers as the machine "breaks in" and settles. I wouldn't worry.


R.

Thank you CaptRB, i was worried at first but after seeing you guys answers i relieved. I had no idea even 2nd monitor can effect those results, but after reading your words i got surprised. Well if it is not that, all my thoughts about these tests gonna change. I mean what kind of a test can give you lower results when you upgrade the machine and ppl use these tests to have an idea of their machine. But anyway thank you for your trouble of trying that. I appreciate the help. Have a nice day.

 

[CaptRB]

Dude

Thank you CaptRB, i was worried at first but after seeing you guys answers i relieved. I had no idea even 2nd monitor can effect those results, but after reading your words i got surprised. Well if it is not that, all my thoughts about these tests gonna change. I mean what kind of a test can give you lower results when you upgrade the machine and ppl use these tests to have an idea of their machine. But anyway thank you for your trouble of trying that. I appreciate the help. Have a nice day.

Doing benchmarks is a lot like doing a Dyno on a car. With the Dyno the horsepower results will rarely be the same, even when done in the same day.
Your computer is doing a lot of little things while int appears to be "doing nothing" and this can effect the scores. Running an external monitor isn't "free." The computer has to work to run these things.


R.

 

[kschendel]

Even adding memory isn't free, technically. You have to maintain page tables to track all of the memory, and the more memory, the larger the page tables get. This is almost certainly a non-issue, at least with the amounts of memory we're talking about, but it's (barely) possible that the larger page tables affected the cache access patterns in some very minor negative way, thus disturbing the benchmark numbers.

Benchmarking is an art, not quite a science.