shawn_eary :
I am thinking about upgrading from a home built Pentium D 2.8 GHZ with 95W TDP computer to a Lenovo with a W3503 with 130 W TDP. After reading the www.spec.org benchmarks I was almost convinced since it appears that the W3503 Xeon is 2x as fast as the Pentium D 2.8 GHZ for typical tasking; unfortunately, the 130 W TDP of the Xeon W3503 really scares me. I think that's about 36 % more power usage and heat.
I am afraid that if I throw a new Xeon 3503 at a 4 hour MPEG rendering session via PowerDirector, that it will blow up. My current Pentium D gets pretty cranky when I render a full 4.7 GB DVD of images.
Do you think the Xeon 3503 will run too hot for the Lenovo? Should I crank out the cash and get a more expensive Xeon E5502 system which only has a TDP of 80W.
BTW: The main reason I am looking at Xeons is the fact that I desire ECC memory for my new computer. I could potentially go with a Core 2 type processor if the motherboard had an onboard ECC correction.
Here are a few things to think about:
1. I'll bet you are using the stock heatsink that came with your Pentium D if you are complaining about it overheating. Intel's stock heatsinks are not all that great and don't stand up well to extended full-load use, as you found out. However, you can always get a much better aftermarket heatsink for that Xeon W3530 for $40 or so that will keep the CPU running nice and cool no matter how heavily you load it.
2. The Xeon E5502 is a dual-core CPU with only 4 MB of L3 cache, no HyperThreading, no Turbo Boost, and is limited to using only DDR3-800 memory. If you are wanting to do a lot of rendering, you want as many cores and threads as you can get, so the W3530 with 4 cores and 8 threads is going to be much faster than the E5502. The E5502 is also a dual-CPU-capable unit and is this going to be more expensive than the single-CPU-only Xeon 3000 series.
3. There are two lines of new Xeons that support ECC- the socket 1366 Xeon 3500 series with 3 memory channels and then the socket 1156 Xeon 3400 series with 2 memory channels. Other than the number of memory channels and socket, the chips are pretty much the same as most are 4-core, 8-thread units with 8 MB of L3 cache. The Xeon 3400 line has a 95-watt TDP as opposed to the 3500 line's 130 watts. I would avoid the X3430 as it does not have HyperThreading enabled, but the other members of the Xeon 3400 line should perform relatively similarly to the 3500s at similar clock speeds for rendering.
4. ECC support in Intel's LGA775 CPUs depends on the chipset in the motherboard. The Xeon chipsets support ECC, as does the 975 chipset. Motherboards with the Xeon chipset will always have ECC support. Some 975 board makers did not put in the BIOS options and such to support ECC, so you will need to look at the specific motherboard to see if the motherboard supports ECC or not.
5. Like the Xeon 3400s, 3500s, and 5500s, AMD's Opteron, Phenom, Phenom II, and Athlon II CPUs all support ECC. ECC support with these CPUs thus depends on if the particular motherboard, just like with Intel 975 motherboards. I will say that not all that many "non-server-oriented" Socket AM2/AM2+/AM3 motherboards have ECC support, so you will need to look around a bit.