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Best socket 775 CPU for Radeon HD 3850 AGP

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First post, by Lazar81

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Hello,
At the moment I am using a P4 prescott with 3,4Ghz.. it looks like my 3850 can't show its whole power with that CPU.

So my question is: what 775 CPU would be a perfect match for this card?

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Reply 1 of 72, by The Serpent Rider

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All boils down to what your motherboard can support. Faster is better.
I would advise not to chase "perfect match" dream. Some games, modes or quality options can cripple 3850 even on Prescott and some can be very hungry for raw CPU power.

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Reply 2 of 72, by Lazar81

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I own a 775i65g revision 2.03...
I have also lying around a cedar mill with 3.40ghz.. but that's also single core ...

PIII-S 1400 | CHAINTECH 6VIA5T | 2 x 256 MB HYNIX RAM | ASUS V8460 ULTRA DELUXE | CREATIVE SOUNDBLASTER 16 CT1740 | CRUCIAL 120 GB SSD | LG DVD WRITER | GOTEK FLOPPY EMULATOR

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Reply 3 of 72, by vetz

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As The Serpent Rider says, boils down to what your motherboard supports.

Experiences from my own Win9x/WinXP build with testing both the HD4650 AGP and HD3850 AGP with a varetity of games is that you'll come to about 2009-2011 in games no matter what. In about that age range games started to become multithreaded and a single core CPU just won't cut it. Also this is about the same time these cards were introduced, but remember they were not highend cards at the time. So running games in 1080p with everything turned to max at 60fps+ is just not going to happen, as you'll be GPU bound (Bulletstorm from 2011 is an example). So if you have a quick P4 that works fine with that card if you limit yourself to 2007-2008 and below (Crysis not included).

Last edited by vetz on 2021-02-07, 11:56. Edited 2 times in total.

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Reply 4 of 72, by winuser_pl

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ATI drivers always had a lot more of CPU overhead comparing to nvidia. I would suggest to go with high clocked Core2Duo with high IPC.
Core 2 Duo E6600 oc'ed to 3..3.1 GHz will do the job.

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Reply 5 of 72, by Lazar81

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I will try and compare the p4 (cedar mill) and a core2duo e6700.. the cooler is a noctua nh-u9b - that should give some room for overclocking...

PIII-S 1400 | CHAINTECH 6VIA5T | 2 x 256 MB HYNIX RAM | ASUS V8460 ULTRA DELUXE | CREATIVE SOUNDBLASTER 16 CT1740 | CRUCIAL 120 GB SSD | LG DVD WRITER | GOTEK FLOPPY EMULATOR

ROLAND MT-32 | ROLAND CM-32L | YAMAHA S-YXG50

Reply 6 of 72, by duga3

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Best socket 775 CPU for Radeon HD 3850 AGP

Intel® Core™2 Extreme Processor QX9770
https://ark.intel.com/content/www/us/en/ark/p … 00-mhz-fsb.html

Intel® Xeon® Processor X5470
https://ark.intel.com/content/www/us/en/ark/p … 33-mhz-fsb.html

Last edited by duga3 on 2021-02-13, 12:25. Edited 2 times in total.

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Reply 7 of 72, by Lazar81

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My Mainboard does not support fsb1600... Otherwise this would be a nice catch

PIII-S 1400 | CHAINTECH 6VIA5T | 2 x 256 MB HYNIX RAM | ASUS V8460 ULTRA DELUXE | CREATIVE SOUNDBLASTER 16 CT1740 | CRUCIAL 120 GB SSD | LG DVD WRITER | GOTEK FLOPPY EMULATOR

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Reply 9 of 72, by Lazar81

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duga3 wrote on 2021-02-13, 12:24:

Updated my post with Xeon which should support 1333.

😀... Nice CPU also... But also not supported... 1066mhz fsb max

PIII-S 1400 | CHAINTECH 6VIA5T | 2 x 256 MB HYNIX RAM | ASUS V8460 ULTRA DELUXE | CREATIVE SOUNDBLASTER 16 CT1740 | CRUCIAL 120 GB SSD | LG DVD WRITER | GOTEK FLOPPY EMULATOR

ROLAND MT-32 | ROLAND CM-32L | YAMAHA S-YXG50

Reply 10 of 72, by duga3

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Lazar81 wrote on 2021-02-13, 12:30:
duga3 wrote on 2021-02-13, 12:24:

Updated my post with Xeon which should support 1333.

😀... Nice CPU also... But also not supported... 1066mhz fsb max

Aargh, that's a pickle. But sometimes getting newer mobo+cpu can be cheaper than getting that one specific/fastest older CPU that your older mobo can support. Not saying that is the case here, but maybe take at least a quick look at other options, outside of focusing on your current mobo. There are often (overlooked) eBay auctions where people sell their obsolete mobo+cpu in bundles for example.

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Reply 12 of 72, by The Serpent Rider

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My Mainboard does not support fsb1600.

Irrelevant. All Core 2 Extreme have unlocked multiplier.

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Reply 13 of 72, by ODwilly

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Q6700 or Q6600 would be my pick. Try to find the G0 iirc stepping if you can, it overclocks better and has better power consumption.

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Reply 14 of 72, by Lazar81

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Hello ... I did some research and it looks like the qx9770 and x5470 are not supported by the mainboard... But please - proof me wrong.

I looked further and am wondering if I just should get following CPUs and just see how they perform:
E6700
Q6700
X6800
672
965

--------
Edit:
Just ordered a q6700 ... Will see how it works

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Reply 15 of 72, by Old_Jelly

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If it's any help here are some 3DMark runs from Q6600 & HD 3850 AGP

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Reply 16 of 72, by pixel_workbench

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Just get any decently fast Core2 Duo, even something like a cheap e7500 or e7600 that's rated for FSB 1066 will blow the doors off any P4. What's the point of using a P4 if you board supports Core2?

Games from 2007 - 2010 will run better with a fast dual core, and typically don't benefit from quads.

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Reply 17 of 72, by mothergoose729

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Lazar81 wrote on 2021-02-13, 12:30:
duga3 wrote on 2021-02-13, 12:24:

Updated my post with Xeon which should support 1333.

😀... Nice CPU also... But also not supported... 1066mhz fsb max

A 3850 was a mid range card in 2008. Any 1066mhz core 2 duo with a decent clock speed will be more than a good match. IMO you don't need to overthink it.

Games didn't start making use of quad cores until well after that card had become completely obsolete. I would suggest an E5000 processor, like the E5800. You won't miss the L2 cache and with its high base multiplier you can easily overclock it to 4.0ghz if you really want to.

Reply 18 of 72, by Lazar81

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Ah well...

thx for the many replies.. every single one is useful for me.

PIII-S 1400 | CHAINTECH 6VIA5T | 2 x 256 MB HYNIX RAM | ASUS V8460 ULTRA DELUXE | CREATIVE SOUNDBLASTER 16 CT1740 | CRUCIAL 120 GB SSD | LG DVD WRITER | GOTEK FLOPPY EMULATOR

ROLAND MT-32 | ROLAND CM-32L | YAMAHA S-YXG50

Reply 19 of 72, by Lazar81

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mothergoose729 wrote on 2021-02-14, 16:03:
Lazar81 wrote on 2021-02-13, 12:30:
duga3 wrote on 2021-02-13, 12:24:

Updated my post with Xeon which should support 1333.

😀... Nice CPU also... But also not supported... 1066mhz fsb max

A 3850 was a mid range card in 2008. Any 1066mhz core 2 duo with a decent clock speed will be more than a good match. IMO you don't need to overthink it.

Games didn't start making use of quad cores until well after that card had become completely obsolete. I would suggest an E5000 processor, like the E5800. You won't miss the L2 cache and with its high base multiplier you can easily overclock it to 4.0ghz if you really want to.

The e5800 looks nice to me. Will try that too

PIII-S 1400 | CHAINTECH 6VIA5T | 2 x 256 MB HYNIX RAM | ASUS V8460 ULTRA DELUXE | CREATIVE SOUNDBLASTER 16 CT1740 | CRUCIAL 120 GB SSD | LG DVD WRITER | GOTEK FLOPPY EMULATOR

ROLAND MT-32 | ROLAND CM-32L | YAMAHA S-YXG50