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dbman190
Posts: 22
Registered: ‎05-19-2011
Location: USA
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Re: Performance gain from dual memory modules (including graphics)

[ Edited ]

I have a 5.7 rating with an i5-2520 and only 4gb (2x2gb) of ram, so yeah, you should have more than 5. Maybe try updating to the newest Lenovo video drivers.

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JNavas
Posts: 570
Registered: ‎08-07-2010
Location: San Francisco Bay Area
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Re: Performance gain from dual memory modules (including graphics)

[ Edited ]

figarro wrote:

John
I have the same config as you but my rating is 5.8. There's something wrong with your software (my guess)...


dbman190 wrote:

I have a 5.7 rating with an i5-2520 and only 4gb (2x2gb) of ram, so yeah, you should have more than 5. Maybe try updating to the newest Lenovo video drivers.


I'm guessing you got that on a 90W Adapter.

I'm using the standard 65W Adapter, which results of graphics throttling, as shown here.

Hope that helps,
John
ThinkPad T420s [ i7-2640M CPU | 8GB RAM | 1TB SSD | Bay Battery | BT | Webcam | FR | Win7Pro64 ]
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thinkpadding
Posts: 15
Registered: ‎04-07-2011
Location: Canada
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Re: Performance gain from dual memory modules (including graphics)

hmmm... that is odd. Bought my x220 (i5-2420, 320GB 7200) with 2GB installed. I ran WEI twice in the first week and got 4.6 and 4.4 for the graphics rating. Just received 2 GB from Lenovo and installed it. With 4GB, WEI now showing 5.8 for graphics. 65 W power adapter for all measurements. No special name on the RAM modules.
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JNavas
Posts: 570
Registered: ‎08-07-2010
Location: San Francisco Bay Area
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Re: Performance gain from dual memory modules (including graphics)

[ Edited ]

thinkpadding wrote:
hmmm... that is odd. Bought my x220 (i5-2420, 320GB 7200) with 2GB installed. I ran WEI twice in the first week and got 4.6 and 4.4 for the graphics rating. Just received 2 GB from Lenovo and installed it. With 4GB, WEI now showing 5.8 for graphics. 65 W power adapter for all measurements. No special name on the RAM modules.

The obvious big difference between our systems is that you have the i5-2420* and I have the i7-2620M.

My guess™ is that the higher power drain of the i7-2620M results in more throttling of the graphics core on the 65W Adapter.

(I haven't yet received the 90W Adapter I ordered, so can't confirm if it solves the problem or not.)

 

* i5-2420? X220 Datasheet only lists:

  • Intel® Core™ i7-2620M Processor (2.7GHz, 4MB L3 Cache) USB 3.0
  • Intel® Core™ i5-2540M Processor (2.5GHz, 3MB L3 Cache)
  • Intel® Core™ i5-2520M Processor (2.5GHz, 3MB Cache)
  • Intel® Core™ i5-2410M Processor (2.3GHz, 3MB L3 Cache)
  • Intel® Core™ i3-2310M Processor (2.1GHz, 3MB L3 Cache)

The painful irony is that more CPU is giving me less performance! Here's what's happening:

 

The Good News:



The Bad News:

Hope that helps,
John
ThinkPad T420s [ i7-2640M CPU | 8GB RAM | 1TB SSD | Bay Battery | BT | Webcam | FR | Win7Pro64 ]
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thinkpadding
Posts: 15
Registered: ‎04-07-2011
Location: Canada
0

Re: Performance gain from dual memory modules (including graphics)

oops... my typo... i5-2410.
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Alexo
Posts: 98
Registered: ‎06-19-2011
Location: Canada
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Re: Performance gain from dual memory modules (including graphics)

"Sandy Bridge's improved memory controller has all but eliminated the need for extreme memory bandwidth, at least for this architecture. It's only when you get down to DDR3-1333 that you see a minor performance penalty. The sweet spot appears to be at DDR3-1600, where you will see a minor performance increase over DDR3-1333 with only a slight increase in cost. The performance increase gained by going up to DDR3-1866 or DDR3-2133 isn't nearly as pronounced."

-- http://www.anandtech.com/print/4503

 

John, please use an external image host.  All your images show as triangles here and, yes, I am signed in.

 

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HiVolt
Posts: 500
Registered: ‎03-20-2011
Location: Toronto, Canada
0

Re: Performance gain from dual memory modules (including graphics)

Alexo, but does that apply to Sandy Bridge mobile, with regard to memory speeds?
---------------------
| X220 i7-2620M | 12.5" IPS | Intel 520 Series 180GB Main SSD | Mushkin 120GB mSATA SSD | 8GB RAM | Intel 6205 WiFi | BT | Win7 Pro 64 SP1 |
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JNavas
Posts: 570
Registered: ‎08-07-2010
Location: San Francisco Bay Area
0

Re: Performance gain from dual memory modules (including graphics)

[ Edited ]

Alexo wrote:
John, please use an external image host.  All your images show as triangles here and, yes, I am signed in.

It's not enough to be signed in -- you may also need to force a full page refresh in your browser with Ctrl+F5.

I've now replaced all my images in this topic with external hosting, but you may still need Ctrl+F5 to see them.

Hope that helps,
John
ThinkPad T420s [ i7-2640M CPU | 8GB RAM | 1TB SSD | Bay Battery | BT | Webcam | FR | Win7Pro64 ]
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Alexo
Posts: 98
Registered: ‎06-19-2011
Location: Canada
0

Re: Performance gain from dual memory modules (including graphics)


HiVolt wrote:
Alexo, but does that apply to Sandy Bridge mobile, with regard to memory speeds?

Don't know.

 

802.11n
JNavas
Posts: 570
Registered: ‎08-07-2010
Location: San Francisco Bay Area
0

Re: Performance gain from dual memory modules (including graphics)

BIOS 1.21 solves the throttling issue!

Hope that helps,
John
ThinkPad T420s [ i7-2640M CPU | 8GB RAM | 1TB SSD | Bay Battery | BT | Webcam | FR | Win7Pro64 ]