4 replies to this topic

[kration]

I've upgraded my ram to from 4GB to 8GB, using these : G.Skill 8GB (2 x 4GB) Ripjaws-X DDR3 PC3-12800 1600MHz CL9

http://www.dabs.com/...b%20DDR3&src=16

But I'm confused about the DRAM frequency - which is rated at 1600mhz. According to Speccy, it's running at 669.7 MHz. I appreciate I need to double that to get the 'true' speed, but even then it's not up to 1600mhz.

Do I need to reset anything to get the proper frequency recognised e.g. the BIOS settings? If so, how?

I'm pleased with the RAM - it's great value and my system is stable. I'm not that fussed about overclocking, so if there's no signigicant perfomance gain in changing the settings then I'm happy to leave them as they are. But any advice would be appreciated.

Cheers.

RAM specs:
RAM
Memory slots
Total memory slots 4
Used memory slots 2
Free memory slots 2
Memory
Type DDR3
Size 8192 MBytes
Channels # Dual
DRAM Frequency 669.7 MHz
CAS# Latency (CL) 9 clocks
RAS# to CAS# Delay (tRCD) 9 clocks
RAS# Precharge (tRP) 9 clocks
Cycle Time (tRAS) 24 clocks
Bank Cycle Time (tRC) 33 clocks
Command Rate (CR) 1T
Physical Memory
Memory Usage 36 %
Total Physical 8.00 GB
Available Physical 5.09 GB
Total Virtual 16 GB
Available Virtual 12 GB
SPD
Number Of SPD Modules 2
Slot #1
Slot #2

System specs:

MS Windows 7 Home Premium 64-bit SP1
CPU - AMD Phenom II X4 955 80 °C Deneb 45nm Technology
RAM - 8.00 GB Dual-Channel DDR3 @ 669MHz (9-9-9-24)
Motherboard - Gigabyte Technology Co., Ltd. GA-MA785GT-UD3H (Socket M2) 36 °C
Graphics - X223W (1680x1050@60Hz) ATI Radeon HD 5700 Series (Sapphire/PCPartner) 56 °C
Hard Drives - 625GB Western Digital WDC WD6400AAKS-00A7B2 ATA Device (SATA) 42 °C
313GB Western Digital WDC WD3200AAJS-65VWA0 ATA Device (SATA) 39 °C
Optical Drives - ATAPI DVD A DH20A1S ATA Device
Audio - Realtek High Definition Audio

[Vulpesveritas]

You're ram is running at 1333mhz. You may have to change it manually to 1600mhz, although you would have to overclock your memory controller as Deneb - based Phenom II processors only support up to DDR3-1333mhz RAM.
The thing to remember is DDR stands for "Double data rate" and therefore you will have to double your given value.

Hope that helps.

[Clay Pigeon]

Speccy always reports ddr variant ram at 1/2 its effective speed.

You need to OC the uncore (used to be called bus back in the smb days) to get benefits of 1600 on phenom IIs.

Edited by Clay Pigeon, 25 May 2012 - 09:57 AM.

[kration]

I'll probably keep the settings as they are as I don't like messing around with basic specs. Even if I did successfully overclock the memory controller and increase the speed to 1600 I doubt I'd really notice the difference.

Thanks for the advice.

[Nasty9]

You could leave the speed alone and decrease the CAS latency to 8-8-8-20 without having to OC your IMC at all too.