Overheating Memory Module A1?

I recently (a week or more ago) bought 4gb (x2 2GB sticks) Crucial ram to upgrade my mac pro - these look exactly the same as the Apple ones just with a Crucial sticker.

I put the 2gb sticks in A1 and A2 slots and A3, A4, B1 and B2 the original 4x 512mb sticks I got from Apple on the initial purchase.

Are these temps normal, I haven't noticed any problems from the time of installing the memory to now and System Profiler reports everything is OK:

Temperature Monitor:
2007-11-06 10:46:28 +0900

Ambient Air: 23.0℃
CPU A Heatsink: 27.0℃
CPU B Heatsink: 28.0℃
Expansion Slots: 31.0℃
Hard Drive Bay 1: 26.0℃
Hard Drive Bay 2: 26.0℃
Hard Drive Bay 3: 25.0℃
Hard Drive Bay 4: 26.0℃
Memory Bank A Point 1: 32.0℃
Memory Bank A Point 2: 38.0℃
Memory Bank A Point 3: 39.0℃
Memory Bank B Point 1: 31.0℃
Memory Bank B Point 2: 34.0℃
Memory Bank B Point 3: 33.0℃
Memory Module A1: 80.0℃ <-- Concern?
Memory Module A2: 53.0℃
Memory Module A3: 50.0℃
Memory Module A4: 47.0℃
Memory Module B1: 49.0℃
Memory Module B2: 51.0℃
Northbridge Heat Sink: 58.0℃
Power Supply Location 1: 34.0℃
Power Supply Location 2: 38.0℃
SMART Disk ST3160812AS P (4LS4CJ4Q): 34.0℃
CPU Core 1: 30.0℃
CPU Core 2: 32.0℃
CPU Core 3: 30.0℃
CPU Core 4: 32.0℃

Thanks for the Feedback.

 

Ok I'll try to swap the sticks around between A1 / A2, I was thinking of doing that and seeing if it follows.

I only have 6 GB total in the machine, as mentioned 2x 2gb sticks and 4x 512's

How can I lay those out?

A1 - 2gb
A2 - 2gb

B1 - 512mb
B2 - 512mb
B3 - 512mb
B4 - 512mb

as I have according to the manual is to setup like below:

A1 - 2gb
A2 - 2gb
A3 - 512mb
A4 - 512mb

B1 - 512mb
B2 - 512mb

Thanks for the replies again.

 

Ok thanks.

I'll move the memory as you suggest:

A1 - 2gb
A2 - 2gb

B1 - 512mb
B2 - 512mb
B3 - 512mb
B4 - 512mb

Then if no change ill swap A1 and A2 first see if the temp stays in that spot or changes to A2.

I'll report the changes here.

 

OK.
I changed the 2x 512's in A3 and A4 into B3 and B4 and the heat is as follows when I booted up and idled:

2007-11-06 12:07:13 +0900

Ambient Air: 23.0℃
CPU A Heatsink: 28.0℃
CPU B Heatsink: 28.0℃
Expansion Slots: 30.0℃
Hard Drive Bay 1: 25.0℃
Hard Drive Bay 2: 25.0℃
Hard Drive Bay 3: 25.0℃
Hard Drive Bay 4: 25.0℃
Memory Bank A Point 1: 29.0℃
Memory Bank A Point 2: 30.0℃
Memory Bank A Point 3: 30.0℃
Memory Bank B Point 1: 30.0℃
Memory Bank B Point 2: 32.0℃
Memory Bank B Point 3: 35.0℃
Memory Module A1: 64.0℃
Memory Module A2: 40.0℃
Memory Module B1: 49.0℃
Memory Module B2: 51.0℃
Northbridge Heat Sink: 51.0℃
Power Supply Location 1: 30.0℃
Power Supply Location 2: 33.0℃
SMART Disk ST3160812AS P (4LS4CJ4Q): 32.0℃
CPU Core 1: 30.0℃
CPU Core 2: 33.0℃
CPU Core 3: 31.0℃
CPU Core 4: 33.0℃
Memory Module B3: 44.0℃
Memory Module B4: 42.0℃

then the Memory Module A1 started to increase up to 69-78 degrees Celsius.

2007-11-06 12:29:46 +0900

Ambient Air: 23.0℃
CPU A Heatsink: 28.0℃
CPU B Heatsink: 30.0℃
Expansion Slots: 33.0℃
Hard Drive Bay 1: 26.0℃
Hard Drive Bay 2: 26.0℃
Hard Drive Bay 3: 25.0℃
Hard Drive Bay 4: 26.0℃
Memory Bank A Point 1: 35.0℃
Memory Bank A Point 2: 39.0℃
Memory Bank A Point 3: 35.0℃
Memory Bank B Point 1: 36.0℃
Memory Bank B Point 2: 42.0℃
Memory Bank B Point 3: 44.0℃
Memory Module A1: 78.0℃
Memory Module A2: 51.0℃
Memory Module B1: 62.0℃
Memory Module B2: 65.0℃
Northbridge Heat Sink: 66.0℃
Power Supply Location 1: 34.0℃
Power Supply Location 2: 37.0℃
SMART Disk ST3160812AS P (4LS4CJ4Q): 34.0℃
CPU Core 1: 32.0℃
CPU Core 2: 34.0℃
CPU Core 3: 31.0℃
CPU Core 4: 33.0℃
Memory Module B3: 55.0℃
Memory Module B4: 54.0℃

I presume loading the browser, mail, itunes and adium would add some load to it? i just put it back to what I was doing prior to reporting the heat increase.

Also I noticed when pulling out the Ram risers the A1 slot seems to sit near a heatsink?

 

Hmm..
Swapped A1 and A2 around and seems the high temps did follow the memory stick.

2007-11-06 13:01:20 +0900

Ambient Air: 23.0℃
CPU A Heatsink: 28.0℃
CPU B Heatsink: 30.0℃
Expansion Slots: 33.0℃
Hard Drive Bay 1: 26.0℃
Hard Drive Bay 2: 26.0℃
Hard Drive Bay 3: 26.0℃
Hard Drive Bay 4: 26.0℃
Memory Bank A Point 1: 34.0℃
Memory Bank A Point 2: 37.0℃
Memory Bank A Point 3: 35.0℃
Memory Bank B Point 1: 35.0℃
Memory Bank B Point 2: 40.0℃
Memory Bank B Point 3: 43.0℃
Memory Module A1: 49.0℃
Memory Module A2: 75.0℃
Memory Module B1: 59.0℃
Memory Module B2: 63.0℃
Northbridge Heat Sink: 64.0℃
Power Supply Location 1: 34.0℃
Power Supply Location 2: 37.0℃
SMART Disk ST3160812AS P (4LS4CJ4Q): 34.0℃
CPU Core 1: 31.0℃
CPU Core 2: 33.0℃
CPU Core 3: 31.0℃
CPU Core 4: 33.0℃
Memory Module B3: 54.0℃
Memory Module B4: 52.0℃

While a little bit cooler than 80degC still seems high I gather?

 

Thanks, I've emailed them and shall go from there to solve and replace them if need be.

Thanks, for all the help.