5770 crossfire 16x/4x

metafan · Jan 2, 2010, 08:55 PM

I want to buy two 5770 (150 Euro each one) that have in crossfire superior or equal performance to those of 5870 :

http://www.xbitlabs.com/misc/picture...58_big.png&1=1

I have a p35 motherboard, I was surprised by reading the manual that the 1st port is 16x while the second is only 4x.
Will this limit the performance so much?
I want at least the performance of a 5850 (that I can't find on the market).

thank you

El_Mayo · Jan 2, 2010, 09:09 PM

i read somewhere it x4 offers only slightly reduced relative performance of x16

metafan · Jan 2, 2010, 09:20 PM

so what do you think ?

Goodman · Jan 2, 2010, 09:39 PM

I did some test with single card (3Dmark & some games) on my crossfirex board (1x16 & 1x8) i didn't see any difference between both & all i'ved got was about 20 points more in 3dmark06 in x16 slot but that was it lol!

So between x8 or x16 there is not really a difference but your's is x4 & pci-e 1.0 or 1.1? , so it may do much difference in your case but i'm not sure?

metafan · Jan 2, 2010, 10:35 PM

PCI-Express 2.0 x16 electrical x4

MKmods · Jan 2, 2010, 10:44 PM

what mobo do you have?

metafan · Jan 2, 2010, 10:46 PM

http://www.gigabyte.com.tw/Products/...ProductID=2742

MKmods · Jan 2, 2010, 10:50 PM

The reason for asking is (I am no intel expert) but isant the P35 a PCI X 1.0?
(if so I dont think X4 would be cool even for the second card)

I run a pair of 5770s on PCI X 2.0 X16's and they are fine but I wish I had gone with a 5850 instead (and added another later if needed)

metafan · Jan 2, 2010, 10:57 PM

Quote:

Originally Posted by MKmods

but isant the P35 a PCI X 1.0?

?? i don't know ??

MKmods · Jan 2, 2010, 11:02 PM

Im pretty sure it is, if so than a x4 on a modern mobo would be like a X2 on yours (and that wouldnt be good for the 5770) Im sure it would work ok but the prob is you are paying top dollar for the GPUs and to lose a chunk of performance on ur mobo its just wasting money.

What size LCD are you using? I run a 24" and the 5770s are fine but I wish they were more (especially for their cost)
If you have anything smaller than a 24 that a single 5850 is plenty (I know they are hard to find and $$ now but in a short while when Nvidia releases its new cards they should be cheaper and more plentiful)

Oh yea, what GPU are you using now?

scope54 · Jan 2, 2010, 11:03 PM

p35 only supports pci-e 1.1

metafan · Jan 2, 2010, 11:05 PM

1600x900
"p35 only supports pci-e 1.1"

but the first pci-express 16x is 2.0 ?

DrPepper · Jan 2, 2010, 11:14 PM

P35 is PCI-E 1.1 only

http://en.wikipedia.org/wiki/Intel_P35

The second slot will be 4x 1.1 I wouldn't go crossfire I'd just get a single 5850.

metafan · Jan 2, 2010, 11:17 PM

it's the first time i heard that

so 5850 (or any) on a 16x 2.0 will be weaker then on 16x 1.1 ?

MKmods · Jan 2, 2010, 11:19 PM

Nope PCI Express 2.0 is allows double the bandwidth of a PCI Express 1.0/1.1 (basically on your mobo(1.0/1.1) the X16 is equal to a modern mobo(2.0) thats X8)

And the second card dosent need as much bandwidth as the first one but to run a card as expensive as the 5770 on a PCI X 1.0 at X4 is a waste of money. (It will work but its just a waste)

The single 5850 is a much better option.

DrPepper · Jan 2, 2010, 11:21 PM

Quote:

Originally Posted by metafan

it's the first time i heard that

so 5850 (or any) on a 16x 2.0 will be weaker then on 16x 1.1 ?

No it should be fine.

metafan · Jan 2, 2010, 11:24 PM

Thanks
so i have to wait for 5850 price's to drop and get one

DrPepper · Jan 2, 2010, 11:25 PM

Quote:

Originally Posted by metafan

Thanks
so i have to wait for 5850 price's to drop and get one

Not likely to be anytime soon. By the time they do chances are better cards will be round the corner.

MKmods · Jan 2, 2010, 11:25 PM

They were supposed to be $279US and I think thats a reasonable price for them.

But lower is always better

InnocentCriminal · Jan 2, 2010, 11:25 PM

Definitely recommend you fill in your System Specifications metafan.

No point going over the same ground, but unfortunately you're going to notice a pretty big performance hit if you go down the Crossfire route. Depending on what the rest of your specification is, upgrading your GFX might not be as easy as you think...

erocker · Jan 2, 2010, 11:31 PM

W1zzard did a full review of PCI-E scaling with a 5870 : http://www.techpowerup.com/reviews/A...press_Scaling/

It's not too hard to draw a conclusion from that.

metafan · Jan 2, 2010, 11:41 PM

i will change first my processor and wait a little for the graphics, and what do you think about that motherboard should i change it too ?

DrPepper · Jan 2, 2010, 11:42 PM

changing cpu and motherboard so you can get two 5770's will cost more than just getting a 5850

metafan · Jan 2, 2010, 11:44 PM

Yeah for the motherboard i can wait, but you see my cpu it will limit the config

DrPepper · Jan 2, 2010, 11:46 PM

Might as well get the 5850 now then upgrade the rest. Unless you upgrade to x58, p55 or phenom II you'd be cheaper just getting the 5850 even though there might be some bottleneck.

Jan 2, 2010, 08:55 PM	#1
metafan Join Date: Dec 2009 Posts: 23 (0.02/day) Thanks: 0 Thanked 0 Times in 0 Posts System Specs	5770 crossfire 16x/4x I want to buy two 5770 (150 Euro each one) that have in crossfire superior or equal performance to those of 5870 : http://www.xbitlabs.com/misc/picture...58_big.png&1=1 I have a p35 motherboard, I was surprised by reading the manual that the 1st port is 16x while the second is only 4x. Will this limit the performance so much? I want at least the performance of a 5850 (that I can't find on the market). thank you

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Jan 2, 2010, 09:09 PM	#2
El_Mayo Join Date: Apr 2009 Location: Bristol, England Posts: 2,100 (1.40/day) Thanks: 1,262 Thanked 193 Times in 155 Posts System Specs	i read somewhere it x4 offers only slightly reduced relative performance of x16 __________________ Battlefield 3: My Battlelog Twitter

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Jan 2, 2010, 09:20 PM	#3
metafan Join Date: Dec 2009 Posts: 23 (0.02/day) Thanks: 0 Thanked 0 Times in 0 Posts System Specs	so what do you think ?

Jan 2, 2010, 09:39 PM	#4
Goodman Join Date: Jun 2009 Location: Canada/Québec/Montreal Posts: 1,506 (1.05/day) Thanks: 253 Thanked 328 Times in 247 Posts System Specs	I did some test with single card (3Dmark & some games) on my crossfirex board (1x16 & 1x8) i didn't see any difference between both & all i'ved got was about 20 points more in 3dmark06 in x16 slot but that was it lol! So between x8 or x16 there is not really a difference but your's is x4 & pci-e 1.0 or 1.1? , so it may do much difference in your case but i'm not sure?

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Jan 2, 2010, 10:35 PM	#5
metafan Join Date: Dec 2009 Posts: 23 (0.02/day) Thanks: 0 Thanked 0 Times in 0 Posts System Specs	PCI-Express 2.0 x16 electrical x4

Jan 2, 2010, 10:44 PM	#6
MKmods Case Mod Guru Join Date: Feb 2008 Location: Nevada Posts: 4,711 (2.46/day) Thanks: 2,879 Thanked 1,766 Times in 1,364 Posts System Specs	what mobo do you have? __________________ Buy tin snips FIRST!

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Jan 2, 2010, 10:46 PM	#7
metafan Join Date: Dec 2009 Posts: 23 (0.02/day) Thanks: 0 Thanked 0 Times in 0 Posts System Specs	http://www.gigabyte.com.tw/Products/...ProductID=2742

Jan 2, 2010, 10:50 PM	#8
MKmods Case Mod Guru Join Date: Feb 2008 Location: Nevada Posts: 4,711 (2.46/day) Thanks: 2,879 Thanked 1,766 Times in 1,364 Posts System Specs	The reason for asking is (I am no intel expert) but isant the P35 a PCI X 1.0? (if so I dont think X4 would be cool even for the second card) I run a pair of 5770s on PCI X 2.0 X16's and they are fine but I wish I had gone with a 5850 instead (and added another later if needed) __________________ Buy tin snips FIRST!

Jan 2, 2010, 11:02 PM	#10
MKmods Case Mod Guru Join Date: Feb 2008 Location: Nevada Posts: 4,711 (2.46/day) Thanks: 2,879 Thanked 1,766 Times in 1,364 Posts System Specs	Im pretty sure it is, if so than a x4 on a modern mobo would be like a X2 on yours (and that wouldnt be good for the 5770) Im sure it would work ok but the prob is you are paying top dollar for the GPUs and to lose a chunk of performance on ur mobo its just wasting money. What size LCD are you using? I run a 24" and the 5770s are fine but I wish they were more (especially for their cost) If you have anything smaller than a 24 that a single 5850 is plenty (I know they are hard to find and $$ now but in a short while when Nvidia releases its new cards they should be cheaper and more plentiful) Oh yea, what GPU are you using now? __________________ Buy tin snips FIRST!

Jan 2, 2010, 11:03 PM	#11
scope54 Join Date: Mar 2005 Location: Southern California :) Posts: 257 (0.09/day) Thanks: 12 Thanked 28 Times in 24 Posts System Specs	p35 only supports pci-e 1.1 __________________ CPU-Z validation sig pics temporarily blocked

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Jan 2, 2010, 11:05 PM	#12
metafan Join Date: Dec 2009 Posts: 23 (0.02/day) Thanks: 0 Thanked 0 Times in 0 Posts System Specs	1600x900 "p35 only supports pci-e 1.1" but the first pci-express 16x is 2.0 ?

Jan 2, 2010, 11:14 PM	#13
DrPepper The Doctor is in the house Join Date: Jan 2008 Location: Scotland (It rains alot) Posts: 6,423 (3.29/day) Thanks: 977 Thanked 828 Times in 667 Posts System Specs	P35 is PCI-E 1.1 only http://en.wikipedia.org/wiki/Intel_P35 The second slot will be 4x 1.1 I wouldn't go crossfire I'd just get a single 5850.

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Jan 2, 2010, 11:17 PM	#14
metafan Join Date: Dec 2009 Posts: 23 (0.02/day) Thanks: 0 Thanked 0 Times in 0 Posts System Specs	it's the first time i heard that so 5850 (or any) on a 16x 2.0 will be weaker then on 16x 1.1 ?

Jan 2, 2010, 11:19 PM	#15
MKmods Case Mod Guru Join Date: Feb 2008 Location: Nevada Posts: 4,711 (2.46/day) Thanks: 2,879 Thanked 1,766 Times in 1,364 Posts System Specs	Nope PCI Express 2.0 is allows double the bandwidth of a PCI Express 1.0/1.1 (basically on your mobo(1.0/1.1) the X16 is equal to a modern mobo(2.0) thats X8) And the second card dosent need as much bandwidth as the first one but to run a card as expensive as the 5770 on a PCI X 1.0 at X4 is a waste of money. (It will work but its just a waste) The single 5850 is a much better option. __________________ Buy tin snips FIRST! Last edited by MKmods; Jan 2, 2010 at 11:24 PM.

Jan 2, 2010, 11:24 PM	#17
metafan Join Date: Dec 2009 Posts: 23 (0.02/day) Thanks: 0 Thanked 0 Times in 0 Posts System Specs	Thanks so i have to wait for 5850 price's to drop and get one

Jan 2, 2010, 11:25 PM	#19
MKmods Case Mod Guru Join Date: Feb 2008 Location: Nevada Posts: 4,711 (2.46/day) Thanks: 2,879 Thanked 1,766 Times in 1,364 Posts System Specs	They were supposed to be $279US and I think thats a reasonable price for them. But lower is always better __________________ Buy tin snips FIRST!

Jan 2, 2010, 11:25 PM	#20
InnocentCriminal Resident Grammar Amender Join Date: Feb 2005 Location: 'ereyfurd, UK Posts: 5,471 (1.82/day) Thanks: 198 Thanked 855 Times in 667 Posts System Specs	Definitely recommend you fill in your System Specifications metafan. No point going over the same ground, but unfortunately you're going to notice a pretty big performance hit if you go down the Crossfire route. Depending on what the rest of your specification is, upgrading your GFX might not be as easy as you think... __________________ *Post count isn't* an intelligence meter. During the rectification of the Vuldronaii the Traveler came as a large, moving Torb. Then, during the third reconciliation of the last of the Meketrex supplicants they chose a new form for him—that of a giant Sloar! Many Shubs and Zuuls knew what it was to be roasted in the depths of the Sloar that day, I can tell you. Musek*: "InnocentCriminal - a Chuck Norris of the TPU - knows what you are about to type and he WILL type it faster than you."*

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Jan 2, 2010, 11:31 PM	#21
erocker Senior Moderator Join Date: Jul 2006 Location: Milwaukee, WI. Posts: 31,930 (12.77/day) Thanks: 2,789 Thanked 12,304 Times in 7,823 Posts System Specs	W1zzard did a full review of PCI-E scaling with a 5870 : http://www.techpowerup.com/reviews/A...press_Scaling/ It's not too hard to draw a conclusion from that.

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Jan 2, 2010, 11:41 PM	#22
metafan Join Date: Dec 2009 Posts: 23 (0.02/day) Thanks: 0 Thanked 0 Times in 0 Posts System Specs	i will change first my processor and wait a little for the graphics, and what do you think about that motherboard should i change it too ?

Jan 2, 2010, 11:42 PM	#23
DrPepper The Doctor is in the house Join Date: Jan 2008 Location: Scotland (It rains alot) Posts: 6,423 (3.29/day) Thanks: 977 Thanked 828 Times in 667 Posts System Specs	changing cpu and motherboard so you can get two 5770's will cost more than just getting a 5850

Jan 2, 2010, 11:44 PM	#24
metafan Join Date: Dec 2009 Posts: 23 (0.02/day) Thanks: 0 Thanked 0 Times in 0 Posts System Specs	Yeah for the motherboard i can wait, but you see my cpu it will limit the config

Jan 2, 2010, 11:46 PM	#25
DrPepper The Doctor is in the house Join Date: Jan 2008 Location: Scotland (It rains alot) Posts: 6,423 (3.29/day) Thanks: 977 Thanked 828 Times in 667 Posts System Specs	Might as well get the 5850 now then upgrade the rest. Unless you upgrade to x58, p55 or phenom II you'd be cheaper just getting the 5850 even though there might be some bottleneck.

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