Kingston HyperX DDR3 Sodimm upgrade has less performance?

Asomodai

Asomodai

Asomodai

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11 Jan 2009
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Hey guys.

I recently took out the standard 4GB RAM that was in my Sony Vaio and put in some of the Kingston HyperX 1866mhz RAM instead.

This RAM runs at a far higher frequency with my Sandbridge I5 Processor, I was expecting big gains.

When running different Benchmarks they all show an improvement in RAM performance. However when I run PCMark Vantage, the memories and gaming test results came at a whole 250-500 points lower then it was when performed with the old RAM.

Any ideas?
 
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You'll be disappointed if you were expecting big gains by changing the RAM.

Memory speed has very little impact on Sandybridge systems.

The Best Memory for Sandy Bridge

Your score in PCMark Vantage means nothing to me.

250-500 points lower is relative to the starting point.

Have you checked the RAM is actually running at 1833MHz?

Is the RAM running in dual channel mode?

Does the new RAM have slacker timings than the old RAM?
 
Surveyor said:
You'll be disappointed if you were expecting big gains by changing the RAM.

Memory speed has very little impact on Sandybridge systems.

The Best Memory for Sandy Bridge

Your score in PCMark Vantage means nothing to me.

250-500 points lower is relative to the starting point.

Have you checked the RAM is actually running at 1833MHz?

Is the RAM running in dual channel mode?

Does the new RAM have slacker timings than the old RAM?
Click to expand...

I was not expecting huge changes, but not anything less! I am unsure about timings of the old RAM. The current modules are running at 11.11.11.32.

Dram frequency in CPUZ is running at 931.3mhz which is about right I believe.

According to CPUZ dual channel mode is not enabled, however according to someone else who has Kingston Hyperx in thesame laptop as me, it never does show it as running in dual channel mode. Sony Vaio bios is really limited and I cant really check what it sees.
 
RAM capacity for gaming is pretty much irrelevant once you get to 4GB as 99% of games don't use more than that.

Look at the Gaming page in the link I posted above and you'll see there's very little difference between slowest and the fastest RAM or between the RAM with the tightest or loosest timings.
 
Hmm, I wonder why there is such a large difference in PCMark Vantage then... Every other benchmark shows the Kingston RAM has far better performance and latency then the old RAM.
 
There's a whole world of difference between benchmarks and real world performance.

The memory bandwidth of 1866MHz RAM is nearly 40% more than 1333MHz RAM but this makes virtually no difference to frame rates in games.

It doesn't with Sandybridge anyway.
 
Unless you are using the integrated GPU of course.

However the 1600mhz kits are the best as they give you good speed and latencies.
 
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