Thinkpads Forum

Hi,

I've recently installed 2x2 gb Kingston HyperX in my laptop and in a laptop of my friend. His thinkpad is a T61p, and he get's a higher rating for his memory in vista even though we have the exact same memory. Does anyone have a reasonable explanation for this?

Looks like my memory is only running at half speed (checked with cpuz). Is the changeable?

exactly what does cpu-z report under the memory tab?

Type: DDR2
Size: 4030 MBytes
Channels # Dual
DC mode Symmetric

DRAM frequency: 330 mhz
FSB:DRAM 3:5
CAS# Latency (CL) 4.0 clocks
RAS# to CAS# Delay (tRCD) 4 clocks
RAS# Precharge(tRCD) 4 clocks
Cycle Time (rRAS) 12 clocks

But it's the same on the T61p, yet he gets better points

Would it help anything flashing the BIOS?

snoby wrote:DRAM frequency: 330 mhz

This number is correct. You don't have anything to worry about. CPU-Z reports the actual memory PLL. In this case, 330 MHz means effective 660 millions of transactions per second, which is pretty close to the DDR2-667 spec.

snoby wrote:But it's the same on the T61p, yet he gets better points

better points?   i don't follow.

everything looks correct to me.

Sorry for my lack of information then.

I don't know if it means anything, but his rating in vista is better for the memory, like 4.8 vs 5.1.

Anyway, will a T61 (6460-65g) run with PC2-6400 (800mhz) memory?

It most probably would, but you wouldn´t benefit from it as it will downclock to 667 MHz.

Cheers

Marin

Okay, some says it won't benefit from the 800mhz because of what you say and some says it will. What's your argument?

What hardware do you both have (and BIOS/Embedded Controller versions)? The Vista numbers for memory can be affected by more than just the memory chips.

It's a 6460-65g

2ghz T7300
Intel PM965
4gb kingston hyperx PC2-5300

BIOS: 2.21

And his is a

2,5ghz T9300
Intel PM965
4gb kingston hyperx PC2-5300

BIOS: Don't know but can't be newer than mine, and don't know his modelnumber

Hmm...... don't see anything with the hardware that would explain it (the memory runs asynchronously to the CPU FSB, and they are both 800MHz). Maybe your buddie has an older BIOS and maybe there's a bug in your newer one?

He has a T61p with dedicated video memory - I presume you don't? If you have integrated graphics, the shared memory architecture could be doing something to the memory performance.

Snoby it is to do with how the T9xxx processors address memory. I have a T61p 6064 XG. With the original cpu, a T7500, my WEI score was 4.8. The same memory now scores 5.1 since I replaced the T7500 with a T9300

T9300 has 6MB of L2 cache and T7300/T7500 has 4MB. That could be the difference.