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Slow RAM for slow people

[OLD VERSION] RAM x2 --> RAM speed /4

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Hi to all the Novabenchers here,
I have a problem concerning my RAM.
I had 2 GB of Samsung RAM PC2 5300U in my computer (complete reference: 1GB 2Rx8 PC2 - 5300U - 555 - 12 - E3 M378T2953EZ3 - CE6 0720). Here is the Novabench's benchmark with those 2 GB:
NovaBench Score: 331 (RAM 2 GB, Samsung)
15/09/2012 14:33:17
Microsoft Windows 7 Edition Familiale Premium
Intel Core2 Duo E4500 2.20GHz @ 2200 MHz
Graphics Card: NVIDIA GeForce 7100 GS
2048 MB System RAM (Score: 100)
- RAM Speed: 2541 MB/s
CPU Tests (Score: 211)
- Floating Point Operations/Second: 50734236
- Integer Operations/Second: 126255018
- MD5 Hashes Generated/Second: 709107
Graphics Tests (Score: 10)
- 3D Frames Per Second: 38
Hardware Tests (Score: 10)
- Primary Partition Capacity: 58 GB
- Drive Write Speed: 53 MB/s

After that, I wanted to add more RAM.
I saw on internet that it seems I could buy DDR2 5300, the "U" at the end of Samsung's reference (5300U) wouldn't matter. So I bought 2 GB of generic RAM (in fact, it is Crucial RAM).
Here are the references: DDR2 667 Mhz / PC5300 1 GB.
Here is the Novabench's benchmark ONLY with those 2 new GB (so I remove the Samsung RAM for this benchmark):
NovaBench Score: 327 (RAM 2GB, generic)
15/09/2012 04:42:03
Microsoft Windows 7 Edition Familiale Premium
Intel Core2 Duo E4500 2.20GHz @ 2200 MHz
Graphics Card: NVIDIA GeForce 7100 GS
2048 MB System RAM (Score: 97)
- RAM Speed: 1931 MB/s
CPU Tests (Score: 211)
- Floating Point Operations/Second: 50735644
- Integer Operations/Second: 126303410
- MD5 Hashes Generated/Second: 709234
Graphics Tests (Score: 10)
- 3D Frames Per Second: 38
Hardware Tests (Score: 9)
- Primary Partition Capacity: 58 GB
- Drive Write Speed: 49 MB/s

Not the best, but still OK.

Finally, I installed all the 4GB in my computer, and now the RAM benchmark is awful:
NovaBench Score: 318 (RAM 4 GB, Samsung + generic)
13/09/2012 01:23:15
Microsoft Windows 7 Edition Familiale Premium
Intel Core2 Duo E4500 2.20GHz @ 2200 MHz
Graphics Card: NVIDIA GeForce 7100 GS
3328 MB System RAM (Score: 85)
- RAM Speed: 755 MB/s
CPU Tests (Score: 212)
- Floating Point Operations/Second: 50716850
- Integer Operations/Second: 127483306
- MD5 Hashes Generated/Second: 711694
Graphics Tests (Score: 10)
- 3D Frames Per Second: 37
Hardware Tests (Score: 11)
- Primary Partition Capacity: 58 GB
- Drive Write Speed: 72 MB/s

During the 3 times, my RAM worked in dual chanel (as seen in CPU-Z), and the caracteristics of both types of RAM are absolutely identical in CPU-Z (except for the manufacturer/model and the year).
Curiously, Novabench only detects 3328 MB, and not 4000 MB (I'm using Windows 7 64 bits).

Well, I'm a little bit lost concerning all this affair. I don't know what to think. If somebody has an opinion about what's happening that makes my RAM speed collapses as it does, I would be glad to hear it.
Anyway, I thank everybody who will have a little bit of time to answer to this topic!
Have a good day.

Edited by Slow RAM for slow people

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The timing, voltage, latency, etc. are both the same for the two different types of RAM?

With all 4GB in, I would run memtest to check for anything else that might be going on.

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The timing, voltage, latency, etc. are both the same for the two different types of RAM?

With all 4GB in, I would run memtest to check for anything else that might be going on.


Hi Nathan,
and thank you for your answer.

Yes, when checked with CPU-Z, all the specs were the same (tab "SPD", and checked for the 4 slots).
Then, I ran 2 tests:
- first, a memory test done by windows 7: everything was OK.
and then, I ran MEMTEST86+ that I have on a G-parted CD, and everything went fine.
I then retried Novabench benchmark, and it went as low as 400 Mhz. But curiously, the computer is not slow.

Anyway, it smelling incompatibility of some sort I guess.
So I took them off from the computer, and sent them back to the seller.
I have 2 other RAM modules on their way from UK, but this time, they are not new but refurbished, but are exactly the same model as I have.

I will let you know if it solve the problem.
Thank you for your interest in my problem! :wink: Edited by Slow RAM for slow people

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Hi Nathan,
I finally received my RAM from UK, and everything is fine now.
Here is my last benchmark:

NovaBench Score: 323




24/09/2012 01:08:53
Microsoft Windows 7 Edition Familiale Premium
Intel Core2 Duo E4500 2.20GHz @ 2200 MHz
Graphics Card: NVIDIA GeForce 7100 GS

3328 MB System RAM (Score: 94)
- RAM Speed: 2489 MB/s

CPU Tests (Score: 208)
- Floating Point Operations/Second: 50669674
- Integer Operations/Second: 122690458
- MD5 Hashes Generated/Second: 697029

Graphics Tests (Score: 10)
- 3D Frames Per Second: 37

Hardware Tests (Score: 11)
- Primary Partition Capacity: 58 GB
- Drive Write Speed: 66 MB/s


Guess that was some incompatibility of some sort.
Thank you for your attention.
:smile:

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