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27 Posts

11-01-2016

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P70 BIOS 2.11 degrades RAM performance

2016-11-01, 10:36 AM

Recently I've upgraded the BIOS of my ThinkPad P70 from 2.10 to 2.11. After this upgrade the speed of my DDR4-SODIMM went down by 20% , from 2666 MHz downto 2133 MHz. The release notes mention something about fixing specific memory modules, but they sure broke mine!

 

On a related subject, the P70 apparently does not support XMP2.0. The maximum speed support by my RAM is  is XMP-3002 @ 3000 MHz. The P70 only supports the JEDEC speed: #7 @ 2666 MHz with BIOS 2.10, now #5 @ 2133 MHz with BIOS 2.11.

 

The P70 is supposed to be Lenovo's high-end machine, it needs support for up-to-date hardware.

It really is a shame that

A) Lenovo does not support regular RAM (afer all, XMP is a common memory standard), and

B) the latest BIOS upgrade just cripples the machine by another 20%.

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X1 Yoga 2nd gen - i7-7600U - 16 GB - 1 TB NVMe - 2k
P73 - Xeon E-2276M - 128GB - 2+2 TB NVMe - 4k - Quadro RTX5000
P70 - Xeon E3-1575M v5 - 64GB - 2+2 TB NVMe - 4k - Quadro M5000M
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27 Posts

11-01-2016

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  • Message 2 of 19

Re: P70 BIOS 2.11 degrades RAM performance

2016-11-01, 10:37 AM
X1 Yoga 2nd gen - i7-7600U - 16 GB - 1 TB NVMe - 2k
P73 - Xeon E-2276M - 128GB - 2+2 TB NVMe - 4k - Quadro RTX5000
P70 - Xeon E3-1575M v5 - 64GB - 2+2 TB NVMe - 4k - Quadro M5000M
W520 - i7-2820QM - 32 GB - 2 TB SSD - FHD - Quadro 2000M
T140 - Xeon E3-1245 v3 - 32 GB - 1+1 TB SSD
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4968 Posts

11-22-2011

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  • Message 3 of 19

Re: P70 BIOS 2.11 degrades RAM performance

2016-11-01, 11:19 AM

Specs from psref, western europe,show P70 DDR4-2133.

http://www.lenovo.com/psref/pdf/ThinkPad_WE.pdf

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109 Posts

09-06-2016

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  • Message 4 of 19

Re: P70 BIOS 2.11 degrades RAM performance

2016-11-01, 21:31 PM

I think P50's use the same type of memory as P70's:

I

I've never seen P70's or P50's with 2666 MHz RAM (not yet, at least).

:

 

 

 

________________________________________________________________
P50 - Xeon E3-1535M v5 - 32 GB RAM - FHD display - Quadro M2000M - Win7 x64
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  • Message 5 of 19

Re: P70 BIOS 2.11 degrades RAM performance

2016-11-01, 22:44 PM

User installed memory is not to Lenovo specs.  If the memory happens to work, user should be very happy.

https://www.scan.co.uk/products/32gb-(2x16gb)-corsair-ddr4-so-dimm-vengeance-pc4-24000-(3000)-non-ecc-unbuffered-cas-16-18-18-39-aut

 

169 GBP (before Vat) =~~ 207 USD

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4968 Posts

11-22-2011

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  • Message 6 of 19

Re: P70 BIOS 2.11 degrades RAM performance

2016-11-02, 0:34 AM

Your CPU-z shows 16GB memory in slot 1, 2666 transfer rate and 1333mhz Frequency, which is JEDEC#7, Corsair part #CMSX32GX4M2A3000C16  >advertised as • 3000MHz.  Transfer rate of 2666 exists. 

Your CPU-z states 64GB installed, which would be 16GB x 4 slots, as shown in your screenshot 2.

 

Your transfer rate is now 2133, the same as user DA(rth)Vader above, ie within Lenovo  specs. Darth has 1066MHZ spec per Cpu-z.   Is Darth running 1066MHZ?

Did the BIOS change result in your corsair,  transfer change from 2666 to 2133, I dont know. You have some very expensive memory! .

MHZ vs transfer speed is VERY confusing.   

 

Use memtest86 next time. Passmark folks are the #1 resource about memory.

http://memtest86.com/

Intel Memory approval:

http://www.cmtlabs.com/x-cmtlpdfreports/026430.pdf

 

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27 Posts

11-01-2016

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  • Message 7 of 19

Re: P70 BIOS 2.11 degrades RAM performance

2016-11-02, 8:13 AM

Thanks for all the feedback, nice to be on this forum. I was aware of the DDR4 specification. The minimum speed for DDR4-SODIMM I've seen so far is 2133 MHz. However, JEDEC 2666 MHz and XMP 3000 MHz memory modulea also are available since the launch of the P70. My point is, that Lenovo's flagship laptop should be able to support these product improvements. What they did however was degrade the performance with the newest BIOS. The hardware is capable of at least 2666 MHz, as shown with BIOS 2.10. Why should I be happy with an unnecessary 20% performance degradation?

X1 Yoga 2nd gen - i7-7600U - 16 GB - 1 TB NVMe - 2k
P73 - Xeon E-2276M - 128GB - 2+2 TB NVMe - 4k - Quadro RTX5000
P70 - Xeon E3-1575M v5 - 64GB - 2+2 TB NVMe - 4k - Quadro M5000M
W520 - i7-2820QM - 32 GB - 2 TB SSD - FHD - Quadro 2000M
T140 - Xeon E3-1245 v3 - 32 GB - 1+1 TB SSD
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27 Posts

11-01-2016

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  • Message 8 of 19

Re: P70 BIOS 2.11 degrades RAM performance

2016-11-02, 9:40 AM

I have installed memtest86 (thanks sclexman) and have benchmarked the memory performance with BIOS 2.11 and BIOS 2.10. To my surprise, the speed after dongrading to BIOS 2.10 stayed at 2133 MHz. Maybe the 2666 MHz speed is not reproduciable? Ot I have a terrible memory myself ;-)

 

Ther was a differnece in the latency reported by memtest, but the memory transfer speeds are exactly the same, so maybe that's an issue with memtest. The BIOS 2.11 reported49.3 nsec latency, whilst 2.10 reported 22.2 nsec. Weird. The maximum memory read speed for both BIOS versions 2.10 and 2.11 was 25924 MB/s.

 

MemTest86 V7.1 Pro Build: 1000
PassMark (R) Software
www.passmark.com

System Information
=============================================
CPU Type: Intel Xeon E3-1575M v5 @ 3.00GHzCPU Type
CPU Clock: 1960 MHz [Turbo: 3535.9 MHz]
L1 Cache: 4 x 64K (122013 MB/s)
L2 Cache: 4 x 256K (51369 MB/s)
L3 Cache: 8192K (28470 MB/s)
Total Physical Memory: 65498M (10318 MB/s)
DIMM Slot #0: PC4-17000 DDR4 2133MHz / 029E CMSX32GX4M2A3000C16
DIMM Slot #1: PC4-17000 DDR4 2133MHz / 029E CMSX32GX4M2A3000C16
DIMM Slot #2: PC4-17000 DDR4 2133MHz / 029E CMSX32GX4M2A3000C16
DIMM Slot #3: PC4-17000 DDR4 2133MHz / 029E CMSX32GX4M2A3000C16

X1 Yoga 2nd gen - i7-7600U - 16 GB - 1 TB NVMe - 2k
P73 - Xeon E-2276M - 128GB - 2+2 TB NVMe - 4k - Quadro RTX5000
P70 - Xeon E3-1575M v5 - 64GB - 2+2 TB NVMe - 4k - Quadro M5000M
W520 - i7-2820QM - 32 GB - 2 TB SSD - FHD - Quadro 2000M
T140 - Xeon E3-1245 v3 - 32 GB - 1+1 TB SSD
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27 Posts

11-01-2016

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  • Message 9 of 19

Re: P70 BIOS 2.11 degrades RAM performance

2016-11-02, 9:47 AM

BIOS 2.10 was removed from Lenovo website, so I have atttached it for your experimenting.

X1 Yoga 2nd gen - i7-7600U - 16 GB - 1 TB NVMe - 2k
P73 - Xeon E-2276M - 128GB - 2+2 TB NVMe - 4k - Quadro RTX5000
P70 - Xeon E3-1575M v5 - 64GB - 2+2 TB NVMe - 4k - Quadro M5000M
W520 - i7-2820QM - 32 GB - 2 TB SSD - FHD - Quadro 2000M
T140 - Xeon E3-1245 v3 - 32 GB - 1+1 TB SSD
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9 Posts

11-04-2016

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  • Message 10 of 19

Re: P70 BIOS 2.11 degrades RAM performance

2016-11-04, 11:04 AM

This is why I pretty much bought the Xeon version and use ECC, that way I don't get too irritated when I get no XMP and 2133 heh.  The idea that you could ever get that memory speed on a laptop seems amazing, makes me think I may get some other memory to play with!

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