e2180 Stable OC on GA P35C DS3R at 3.4GHz

Just thought I'd make a contribution and post the results of my recent OC.

By reducing the multiplier to 9...I was able to increase the RAM to 950 MHz at +0.2 v ( = 2.1v)

The FSB is runing at 378 MHz.

Voltages are CPU (Stock was 1.25v): 1.475v (1.445 with droop)
FSB: +0.2
MCH: +0.2

Using Antec P180 Case: Stock fans at medium settings and Arctic Cooler Pro 7.....with stock paste (ie. brand new)

Currently getting 3.4 at a max temp of 60 deg C whilst running Orthos.

Achieving SuperPi 1M: 18 secs / 2M: 44secs
PC Mark 05 CPU: 8660 / MEM: 6760
SiSoft Sandra Proc Arith D: 31,558...W: 21,833
Multi-core Efficy: 7267
Inter-core Latency: 27 ns
Mem Latency: 89 ns
HotCPU Benchmark: 15,900

3D Mark 05: 1680x1050 no AA/AF : Graphics: 15,500 CPU: 12,000
4 AA / 8 AF: Graphics: 10,658 CPU: 11,200

3D Mark 06: 1680x 1050 no AA/AF: Graphics: 10,150 CPU: 2900 SM2: 4537
4 AA / 8 AF: Graphics: 6,138 CPU: 2877 SM2: 2596

F.E.A.R Built-in Benchmark: 1680x 1050 4AA/8AF All Max - no soft Shadows Min: 42/ Mean 75 / Max: 135 (no Vert Sych !)

Hope the above is useful. (My entire PC costs £600 at todays best prices).

Antec P180 Aluminium
Deskstar 320GB PK7250 (or something like that - rec. by Custompc.co.uk)
Corsair XMS2 800Mhz 5/5/5/15 2GB (Twin 2x1GB) pack
e2180 1MB cache MO revision (1.25v / 2.0 GHz 10x multiplier at stock)
eVGA Geforce 8800GTS 320MB at 640 / 970 MHz (never goes over 60deg C with 80% Fan (via Rivatuner control)
Gigabyte P35C DS3R m/b Revision 1.1
Antec Truepower Trio 650 Watts - 3x12v rails with 18amps per rail
Pioneer BK 212 (?) DVD ROM

I have seen other 2180's overclocked all the way to 3.6, but that is at the expenses of 1.5 volts to the cpu along with the max. +0.3v to the RAM,FSB and MCH Northbridge...with temperatures on air at over 70deg.

Personally, I'd like my system to last more than a few months and value a reasonable balance of performance, heat, power consumption and stability; and of vourse...longevity !!!

I thought stock voltage for E2180 was 1.3125V? Thanks for your specs though, im going for the same.

I did mine at 3 ghz, (300x10). All i wanted out of this chip was it to run at 3 ghz, stable, and it does that fine. Im using 1.39V according to cpu-z, and its been stable, no reboots, etc. What an awesome purchase for 89 bucks

As for running 1:1 RAM, I doubt it would be significantly better than 4:5.

Also, the guy who did a massive amount of tests with the e2180 on various m/boards at different o/c settings, reckoned that the optimum FSB was 350-360, with performance tailing off towards 400.

and surely, running RAM at 950 Mhz beats running it at stock 800 ? !!!

Well actually both CPUz and the Gigabyte monitor that comes with the board - both state the Vuid at 1.25v...as I say, I clearly got lucky with the chip...!

It would likely go to 3.6/3.7, so leaving it at 3.4 means built in headroom, less than max voltage = good temps (never exceed 62deg on Orthos in a warm room, and therefore long life and stability.

Not bad for a £600 PC...especially when the newest (fastest available) processor does SuperPi 1M in 15 secs vs mine at 18 secs...but that processor costs more than my entire PC !