Solved!
Go to SolutionCPU Upgrade for Optiplex 755 - Core 2 Quad?
Hey guys!
I've got a Dell Optiplex 755 desktop. It's a SFF, and I picked it up from the recycling room at my office. It just needed an HD fan, and it runs great. It's got a Core 2 vPro 3.0ghz in it right now, 4mb cache, and 1333-FSB.
It runs great, but I'd like to upgrade it to a slightly faster processor and I'm considering my options. I looked at the fastest Core 2 Duo I could get, and they only offer a 3.33ghz, however, it's something like $350 bucks for the processor.
I started thinking maybe I should see what else there is, and realized that there is also the Core 2 Quad, and the Core 2 Extreeme that both are available with 1333mhz FSB a larger cache, and still PGA775 (or whatever).
I'm curious, but do you guys know if it's possibly to install a Core 2 Quad, or a Core 2 Extreme in my Dell Optiplex 755? This PDF shows on Page 10 that it SHOULD take a Core 2 Quad. http://www.dell.com/downloads/global/products/optix/en/opti_755_techspecs.pdf
Is that the maximum that the BIOS will recognize / support? Can I use a QX6850?
Thanks guys!!!
Todd
The QX8200 May not work due to
CPUID 010677h
Core stepping M1
I also think the 130W and 150W cpu's would require a Tower with Greater than
305W power supply AND the Copper heatpipe heatsink.
These are the Quads we validated -
N652J 3.00GHz YorkfieldQuad Core Q9650, 12MB Q9650
F886J 2.83GHz Yorkfield Quad Core Q9550 12MB, 1333FSB, E0
N650J 2.66GHz Yorkfield Quad Core Q9400, 6MB, 1333FSB, R0
MP627 2.66GHz Kentsfield Quad Core Q6700, 8MB, 1066FSB, G0
Dell recommends applying this update during your next scheduled update cycle. The update contains feature enhancements or changes that will help keep your system software current and compatible with other system modules (firmware, BIOS, drivers and software).
UPDATING the bios must be done BEFORE trying another cpu.
Dell Dell DeviceRelease Date: 12/22/2011 Version: A21 Importance: Recommended Download Type: BIOS File Format: Non-Packaged File Size: 2MB CPUIDs 10677 (SLB5M)
1067A (SLG9S)Manufacturing process 0.045 micron CPUs, related to Intel Core 2 Quad Q8200
Model Cores /
ThreadsFreq. L2
cacheTDP Features Intel Core 2 Quad family, Socket 775 Intel Core 2 Quad Q9500 4 / 4 2.83 GHz 6 MB 95 Watt SSE4, VT, ESS Intel Core 2 Quad Q9505 4 / 4 2.83 GHz 6 MB 95 Watt SSE4, VT, TXT, ESS Intel Core 2 Quad Q9505S 4 / 4 2.83 GHz 6 MB 65 Watt SSE4, VT, TXT, ESS Intel Core 2 Quad Q9450S 4 / 4 2.66 GHz 12 MB 65 Watt SSE4, VT, ESS Intel Core 2 Quad Q9450 4 / 4 2.66 GHz 12 MB 95 Watt SSE4, VT, TXT, ESS Intel Core 2 Quad Q9550 4 / 4 2.83 GHz 12 MB 95 Watt SSE4, VT, TXT, ESS Intel Core 2 Quad Q9550S 4 / 4 2.83 GHz 12 MB 65 Watt SSE4, VT, TXT, ESS Intel Core 2 Quad Q9700 4 / 4 3.16 GHz 6 MB 95 Watt SSE4, VT, ESS Intel Core 2 Quad Q9705 4 / 4 3.16 GHz 6 MB 95 Watt SSE4, VT, TXT, ESS Intel Core 2 Quad Q9650 4 / 4 3 GHz 12 MB 95 Watt SSE4, VT, TXT, ESS CPUs, related to Intel Core 2 Extreme QX9650
Model Cores /
ThreadsFreq. L2
cacheMulti-
processingTDP Features Intel Core 2 Extreme family, Socket 775 Intel Core 2 Extreme X6800 2 / 2 2.93 GHz 4 MB 1 75 Watt SSE4, VT, ESS Intel Core 2 Extreme QX6700 4 / 4 2.66 GHz 8 MB 1 130 Watt SSE4, VT, ESS Intel Core 2 Extreme QX6800 4 / 4 2.93 GHz 8 MB 1 130 Watt SSE4, VT, ESS Intel Core 2 Extreme QX6850 4 / 4 3 GHz 8 MB 1 130 Watt SSE4, VT, ESS Intel Core 2 Extreme QX9770 4 / 4 3.2 GHz 12 MB 1 136 Watt SSE4, VT, ESS Intel Core 2 Extreme family, Core micro-architecture, Other sockets Intel Core 2 Extreme QX9775 4 / 4 3.2 GHz 12 MB 2 150 Watt SSE4, VT, ESS Processor
Intel Core 2 Quad Q6700 Processor (2.66GHz, 8MB L2 cache, 1066MHz FSB, VT)
Intel Core 2 Quad Q6600 Processor (2.4GHz, 8MB L2 cache, 1066MHz FSB, VT)Intel Core 2 Duo E6850 Processor (3.0GHz, 4MB L2 cache, 1333MHz FSB, vPro, VT)
Intel Core 2 Duo E6750 Processor (2.66GHz, 4MB L2 cache, 1333MHz FSB, vPro, VT)
Intel Core 2 Duo E6550 Processor (2.33GHz, 4MB L2 cache, 1333MHz FSB, vPro, VT)Intel Core 2 Duo E4600 Processor (2.4GHz, 2MB L2 cache, 800MHz FSB)
Intel Core 2 Duo E4500 Processor (2.2GHz, 2MB L2 cache, 800MHz FSB)
Intel Core 2 Duo E4400 Processor (2.0GHz, 2MB L2 cache, 800MHz FSB)Intel Core 2 Duo E2180 Processor (2.0GHz, 1MB L2 cache, 800MHz FSB)
Intel Core 2 Duo E2160 Processor (1.8GHz, 1MB L2 cache, 800MHz FSB)
Intel Core 2 Duo E2140 Processor (1.6GHz, 1MB L2 cache, 800MHz FSB)
Intel Celeron 440 Processor (2.0GHz, 512K L2 cache, 800MHz FSB)
Intel Celeron 430 Processor (2.0GHz, 512K L2 cache, 800MHz FSB)Hello,
I have a Dell Optiplex 755 and received a Intel Core 2 Extreme QX6700 BUT it will not work in my 755 it says it is
not compatible and will not boot. A Intel Core 2 Q6700 will work SO is the Intel Core 2 Extreme QX6700 a waste of $$
for me and will not work with a 755 at all OR.... what can I do???.
PLEASE HELP!!!
Cheeseiron
2 Posts
58681
0
Posted June 11th, 2012 02:00
Ok, so have you upgraded the PSU from the stock one? It is not powerful enough to run that CPU if you havent. I have an Optiplex 755 as well and I upgraded it to a 750Watt... So anyways did you upgrade it?
Cheeseiron
2 Posts
58681
0
Posted June 11th, 2012 08:00
Oh , yeah right I forgot, yea h you need the newest BIOS also... thanks @Speedstep...
Hi Chris I have a question for you. I am currently running a Q6600 on my optiplex775 I would like to know if it's worth the extra ££s to buy a Q9650... Would i see a great performance increase or notice much diffrence. Another Question is Iv'e just added more ram from 4gb to 8gb all the sticks are 800mhz but are diffrent brands and have diffrent latency's so the system has now set the ram clock speed to 667mhz would this be a performance issue for the current or if i was to buy. The Q9650.. The way I have worked it out it wont. As the bus speed of my current cpu is 266mhz and the ram is 333mhz as reported by cpu-z..And if im right the Q9650 has a bus speed of 333mhz so the Fsb:Spd ratio would be 1:1.. Is this correct??? Or would I benefit from faster ram bandwidth?
Many Thanks in advance Chris.
Rob
DELL-Chris M
Community Manager
•
56891 Posts
•
232143 Points
58635
1
Posted July 30th, 2011 16:00
These are the Quads we validated -
N652J 3.00GHz Yorkfield Quad Core Q9650, 12MB
F886J 2.83GHz Yorkfield Quad Core Q9550 12MB, 1333FSB, E0
N650J 2.66GHz Yorkfield Quad Core Q9400, 6MB, 1333FSB, R0
MP627 2.66GHz Kentsfield Quad Core Q6700, 8MB, 1066FSB, G0
DELL-Chris M (old account)
#IWork4Dell