What is the fastest CPU that can be used with a Socket 5 and a Socket 7 mobo?

[Wirehead]

What is the fastest CPU that can be used with a Socket 5 and a Socket 7 mobo?

 

[Russ]

Some socket 5's will work up to 166, and will also sometimes work with a K6-233Mhz because it has a 3.2v core. Standard socket 7 will work up to 233Mhz if it is MMX capable (split voltage). Super socket 7 will work up to 550Mhz, which is the highest AMD CPU available.

Russ, NCNE

 

[AndyHui]

Depending on the motherboard, a lot of Socket 5 boards didn't have multiplier support for anything above 133. Like Russ says, may do Pentium 166 and K6-233 (not K6-x).

Socket 7 will all handle Pentiums up to 200, and if they support dual plane voltage, Pentium MMX up to 233, K6, K6-2, and perhaps higher speeds such as 300 and above with a bit of a mod.

What motherboard do you have anyway?

 

[randypj]

I can only speak about Socket 7. Super Socket 7's should get a boost from any AMD K6-3. IME, they also have been very o/c friendly. For Socket 7, you will need the ability to split voltage core/IO.

This is what I just did to get a kick. It boosted my 3DMark2000 score from ~420 to ~848 (I'm not at home and don't have the figures with me). It also now specs higher than (going by memory) similar configured PII 333 and K6-2 500. Kinda gave it new life.

FIC PA-2012 mobo. Previously, AMD K6-233 o/c to 266, Banshee 16MB PCI.

I was clued into this by a buddy that sells 'em. Site in my sig, but get 'em anywhere. He's got some comparison specs on his site.

AMD K6-III 350. Yes, it is a III. They were intended for the mobile market, and seem to be much more o/c friendly. The core voltage is spec'd to be 2.1 to 2.3. My 2012 only has 2.1 and 75mhz FSB, but runs it rock solid at 2.1 volt, 75mhz and 4.5 mult.(mobo's max). This is 4.5 x 75 = 337.5. If it was a SuperSocket 7 that supported 112 FSB, this would be equivalent to 4.5 x 112 = 504. Heck, I may have to break out one of my 503+ mobo's just to see what it really can do. I felt this gave me the best cost to performance ratio.
FWIW.
--Randy

 

[Eli]

Hmm.... You guys are forgetting the 2x multiplier remap AMD blessed us with.

You should be able to use a K6-2/400 @ 2x66MHz in a lot of MMX-enabled Socket-7 boards.

 

[Wirehead]

Great answers. Just what I was looking for. Thanks.

 

[randypj]

Eli--Correct me if I'm wrong, but wouldn't 2 x 66 = 132? Yes it could be used, but I would think most mobos would have higher multiplers and a person would want a cpu that supports a higher multipler? I think you'd agree that a K6-III is a good bit better than a K6-2?
--Randy

 

[Russ]

Eli,

The remap doesn't do one any good if you don't have the core voltage to support it. Many S7 boards that are MMX capable do not have voltages that low (2.2v).

randypj,

The 400Mhz part remaps 2x to 6x just as the 233Mhz part remaps 1.5x to 3.5x. Thus, on some boards, 6x66=400Mhz.

Russ, NCNE

 

[randypj]

Russ and Eli--thanks for the information. I didn't know that. Makes sense. I guess I quit following AMD too soon, or started drinking too early.
--Randy