New M6500 Discussion Thread

I think 720 running 4 cores at 1.6 GHz, 820 running 4 cores at 1.73 GHz, or 920 running 4 cores at 2.0 GHz is not throttling. They are running base frequency. I read that 720 can run upto 2.8 GHz, 820 upto 3.06 GHz, and 920 upto 3.2GHz. I think that is what Intel calls Intel Turbo Boost. So, My M6500 Covet 920XM running 4 cores at 2.0 GHz isn't throttling. BTW, I saw it running 4 cores at 2.26GHz (x14). I see it go upto 3.2GHz with single core when Intel turbo Boost kicks in.

 

I'm using 1333 memory, as for WEI I'm not sure if its speed or total amount based.

 

Would you mind running the SandraSoft Lite's Memory bandwidth benchmark and posting the numbers for comparison? Your i7-920XM chip is supposed to have a better memory interface (max of 21 GB/s according to the Intel specs).

It would be interesting to see how close Dell has come to reaching the 21 GB/s limit.

I found this link that shows the memory SandraSoft benchmarks between your chip and mine. My benchmarks were close to theirs. It would be interesting to see if yours also matches theirs.

16.9GB/s versus 5.8GB/s

http://www.intel.com/performance/mobile/extreme/table.htm

The memory bandwidth delta is almost 300% where all of the other benchmarks are only @ 10%-20%.

Thanks,
Tim

 

I get 16.1 with my i7 820qm

 

I ran the test out of interest.

Here are my results in reference to the memory:

Please do note that I am currently working with VLC playing audio ms word ms excel firefox thunderbird and other small apps open I don't know if they affects anything but if it does just take that into consideration i guess.

Code:

SiSoftware Sandra

Benchmark Results
Aggregate Memory Performance : 16GB/s
Integer Buff'd iSSE2 Memory Bandwidth : 16GB/s
Float Buff'd iSSE2 Memory Bandwidth : 16.14GB/s
Results Interpretation : Higher scores are better.

Windows Experience Index
Current Chipset/Memory : 7.4
Results Interpretation : Higher scores are better.

Performance vs. Speed
Aggregate Memory Performance : 12.39MB/s/MHz
Integer Buff'd iSSE2 Memory Bandwidth : 12.36MB/s/MHz
Float Buff'd iSSE2 Memory Bandwidth : 12.42MB/s/MHz
Results Interpretation : Higher scores are better.

Performance vs. Power
Chipset(s)/Memory Power : 17.98W
Aggregate Memory Performance : 916.69MB/s/W
Integer Buff'd iSSE2 Memory Bandwidth : 914.35MB/s/W
Float Buff'd iSSE2 Memory Bandwidth : 919.08MB/s/W
Results Interpretation : Higher scores are better.

Capacity vs Power
Memory Capacity : 456MB/W
Results Interpretation : Higher scores are better.

Integer Buff'd iSSE2 Memory Bandwidth
Assignment : 16GB/s
Scaling : 16GB/s
Addition : 16GB/s
Triad : 16.14GB/s
Data Item Size : 16bytes
Buffering Used : Yes
Offset Displacement : Yes
Bandwidth Efficiency : 77.26%

Float Buff'd iSSE2 Memory Bandwidth
Assignment : 16GB/s
Scaling : 16.1GB/s
Addition : 16.17GB/s
Triad : 16.17GB/s
Data Item Size : 16bytes
Buffering Used : Yes
Offset Displacement : Yes
Bandwidth Efficiency : 77.66%

Performance Test Status
Result ID : Intel Clarksfield/Lynnfield DMI; 2x 4GB Kingston 9905428-023A00LF DDR3 SO-DIMM (1.33GHz) PC3-10700 (7-7-7-20 4-27-11-6)
Platform Compliance : x64
Total Memory : 8GB
Memory Used by Test : 4GB
NUMA Support : No
SMP (Multi-Processor) Benchmark : No
Total Test Threads : 4
Multi-Core Test : Yes
SMT (Multi-Threaded) Benchmark : Yes
Processor Affinity : P0C0T0 P0C1T0 P0C2T0 P0C3T0 
System Timer : 1.69MHz
Page Size : 4kB
Use Large Memory Pages : No

Features
SSE Technology : Yes
SSE2 Technology : Yes
SSE3 Technology : Yes
Supplemental SSE3 Technology : Yes
SSE4.1 Technology : Yes
SSE4.2 Technology : Yes
AVX - Advanced Vector eXtensions : No
FMA - Fused Multiply/Add eXtensions : No
SSE4A Technology : No
FMA4 - 4 Operands Fused Multiply/Add eXtensions : No
HTT - Hyper-Threading Technology : Yes

Chipset
Model : Dell Clarksfield/Lynnfield DMI
OEM Device Name : Intel Clarksfield/Lynnfield DMI
Revision : B2
Front Side Bus Speed : 2x 2.4GHz (4.79GHz)
In/Out Width : 20-bit / 20-bit
Maximum Bus Bandwidth : 18.7GB/s

Chipset
Model : Intel Core Mobile (Clarksfield) UnCore
OEM Device Name : Intel Core Mobile (Clarksfield) UnCore
Revision : A5
Front Side Bus Speed : 2x 2.4GHz (4.79GHz)

Logical/Chipset Memory Banks
Bank 0 : 2GB DDR3 SO-DIMM 7-7-7-20 4-27-11-6 2T
Bank 1 : 2GB DDR3 SO-DIMM 7-7-7-20 4-27-11-6 2T
Bank 3 : 2GB DDR3 SO-DIMM 7-7-7-20 4-27-11-6 2T
Bank 4 : 2GB DDR3 SO-DIMM 7-7-7-20 4-27-11-6 2T
Channels : 2
Memory Bus Speed : 2x 665MHz (1.33GHz)
Multiplier : 5x
Width : 64-bit
Integrated in Processor : Yes
Cores per Memory Controller : 4 Unit(s)
Maximum Memory Bus Bandwidth : 20.78GB/s

Memory Module(s)
Memory Module : Kingston 9905428-023A00LF 2GB DDR3 SO-DIMM PC3-10700S DDR3-1334 (7-7-7-20 4-33-10-5)
Memory Module : Kingston 9905428-023A00LF 2GB DDR3 SO-DIMM PC3-10700S DDR3-1334 (7-7-7-20 4-33-10-5)
Memory Module : Kingston 9905428-023A00LF 2GB DDR3 SO-DIMM PC3-10700S DDR3-1334 (7-7-7-20 4-33-10-5)
Memory Module : Kingston 9905428-023A00LF 2GB DDR3 SO-DIMM PC3-10700S DDR3-1334 (7-7-7-20 4-33-10-5)

Performance Tips
Notice 5008 : To change benchmarks, click Options.
Notice 5004 : Synthetic benchmark. May not tally with 'real-life' performance.
Notice 5006 : Only compare the results with ones obtained using the same version!
Warning 5010 : Cannot use Large Memory Pages due to lack of privileges.
Tip 2 : Double-click tip or press Enter while a tip is selected for more information about the tip.

 

Thanks much. It looks like DELL has about tripled their memory bandwidth between the M6400 and the M6500, but hasn't reached the theoretical limit quoted in the Intel specs.

BTW, what memory are you using DDR3-1066, 1333, or 1600?

Tim

 

Altoid,

Thank you for the detailed benchmarks. I am sure with almost any benchmarks, the fewer the other processes and context switching the better.

It looks like WEI gives @ 0.2 points for tripling the memory bandwidth.

These are also interesting numbers. I wonder if these Dell chipset limits are for all M6500's.

Aggregate Memory Performance : 16GB/s
Bandwidth Efficiency : 77.26%

Chipset
Maximum Bus Bandwidth : 18.7GB/s

Logical/Chipset Memory Banks
Maximum Memory Bus Bandwidth : 20.78GB/s

Sincerely,
Tim

 

I have DDR3-1333 - 8GB with 4*2GB modules

 

any linux with any tablet. I don't use a tablet at the moment, so I really just want to know people's experiences.

 

"If you have a machine that has sufficient cooling and proper voltage/current, throttling should not occur... correct? "

It depends on your power management settings, if you are not fully utilizing the CPUs and have the machine setup to throttle on idle, it might still throttle even with great cooling.

I realize the fan coming on is not the same thing as throttling. They are two different issues, though they are both related to the Bios seemingly being too conservative about temperature. Presumably because this is because Dell had some problems with laptops overheating which is a big PR problem for them as well as expensive to replace. I understand completely that they would want to ship the laptops out with a conservative temperature management profile - but as a power user I would like to be able to override the Bios and control the fan & CPU throttling a bit more myself.

The way I can tell it's throttling is by running something that uses heavy CPU like IntelBurnTest. Then I can literally watch the core temps and clocks with something like CPUID. You can see the clock rates run at 100% and the temperature crawls up to 55 C or so, and then the core throttle and I see them go down to 70% speed or so and the temperature stabilizes around 54 C.

Intel's melt-down temp is 100 C , and I know lots of people run these cores around 70 C, so this seems way too conservative.