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AMD Athlon X4 740 and AMD Athlon X4 750K Processors

The new stars of the budget CPU market.

March 7, 2013



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Today we'll focus on a pair of AMD's Trinity-based budget processors. Our summer review proved the FM1-based Athlon II X4 processors to be quite good. Now we're going to see if their counterparts can keep up.

Testbeds

CPU Athlon X4 740 Athlon X4 750K A10-5700
Core Trinity Trinity Trinity
Process technology, nm 32 32 32
Core clock (std/max), GHz 3.2/3.7 3.4/4.0 3.4/4.0
Modules/threads 2/4 2/4 2/4
L1 cache (sum), I/D, KB 128/64 128/64 128/64
L2 cache, KB 2 x 2048 2 x 2048 2 x 2048
RAM 2 x DDR3-1866 2 x DDR3-1866 2 x DDR3-1866
GPU - - Radeon HD 7660D
Socket FM2 FM2 FM2
TDP, W 65 100 65

Though the lowest-end FM1-based Athlon is X2 340, it's unlikely to be often seen in stores or ready PCs. Manufacturers would prefer A4-5300, because, having the same capabilities, it would let them save on a discrete GPU.

The situation is different with the top Athlon X4 solutions: being cheaper than AMD's A8/A10 GPUs, they offer the same CPU part, which makes them the best FM2 processors for use with discrete graphics. Athlon X4 740 is just like an A8-5500 with the GPU disabled. Athlon X4 750K, in turn, is similar to a A10-5700 with the GPU disabled, but it also has unlocked multipliers and higher TDP.

Processor Athlon II X4 651 Phenom II X4 955 FX-4100 Pentium G870
Core Name Llano Deneb Zambezi Sandy Bridge
Process technology, nm 32 45 32 32
Core clock (std/max), GHz 3.0 3.2 3.6/3.8 3.1
Number of cores/threads 4/4 4/4 2/4 2/2
L1 Cache (sum), I/D, KB 256/256 256/256 128/64 64/64
L2 Cache, KB 4 x 1024 4 x 512 2 x 2048 2 x 256
L3 Cache, MiB - 6 8 3
RAM 2 x DDR3-1866 2 x DDR3-1333 2 x DDR3-1866 2 x DDR3-1333
GPU - - - HD Graphics
Socket FM1 AM3 AM3+ LGA1155
TDP, W 100 125 95 65

We threw in Phenom II X4 955, which has recently became cheaper and now falls in our chosen price segment.

AMD FX-4100 is the cheapest AM3+ processor. Its microarchitecture is similar to that of the latest Athlons: while older, it boasts of higher nominal clock rate and more L3 cache. The competition is going to be interesting.

Intel has close to nothing to offer for less than a hundred bucks, except for some dual-thread processors. So we've added Pentium G870, while, for example, Ivy Bridge based G2120 is too expensive for our test needs.

Socket Motherboard RAM
LGA1155 Biostar TH67XE (H67) Corsair Vengeance CMZ8GX3M2A1600C9B (2x1333; 9-9-9-24)
AM3+ ASUS Crosshair V Formula (990 FX) Corsair Vengeance CMZ8GX3M2A1600C9B (2x1333; 9-9-9-24-2T, Unganged Mode)
FM2 MSI FM2-A85XA-G65 (A85) Corsair Dominator Platinum CMD16GX3M4A2666C10(2x1866; 9-10-9-28)
FM1 Gigabyte A75M-UD2H (A75) Corsair Dominator Platinum CMD16GX3M4A2666C10 (2x1866; 9-10-9-28)

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Article navigation:

Page 1: Introduction, testbeds

Page 2: Tests

Page 3: Tests cont'd, final thoughts



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