AMD slashed prices on some PC processors by as much as 57 percent in a listing released today, firing the latest salvo in a battle with rival Intel.

The new price list is a sign the company is defending its hard-won market share against Intel. The world's largest chip maker cut its microprocessor prices last month, and is widely expected to reduce them again soon. AMD has been grabbing market share from Intel for the past several months, fighting percent by percent in various product segments. But Intel has staged a comeback recently by boosting the technology in its processors and announcing several new products.

Price competition has been the latest weapon of choice for the companies, which is great for users since the processor is the most expensive component inside a PC. It's not good for the companies, however. Both Intel and AMD missed earnings estimates when they announced second-quarter results last week, with Intel blaming lower average selling prices for part of its shortfall.

Users can look forward to bargains in the PC space in coming months as the two companies battle it out. AMD dropped the price of its dual-core Athlon 64 X2 5000+ (socket AM2 only) to $301 (about £163) today, from $696 (£376) when it last published a price list in May. It also cut the price of the Athlon 64 X2 4600+ (socket AM2 and 939) by 57 percent to $240 (£130) from $558 (£301).

Although the biggest AMD price reductions were in PC processors, the company also cut prices for laptop processor prices.

Prices of its AMD Turion 64 mobile chips fell by as much as 26 percent, with its Model ML-44 down to $263 (£142) from $354 (£191) in May. Prices for AMD Sempron chips for desktops and laptops also fell.